/************************************************************************* * * * YAP Prolog * * * * Yap Prolog was developed at NCCUP - Universidade do Porto * * * * Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 * * * ************************************************************************** * * * File: cdmgr.c * * comments: Code manager * * * * Last rev: $Date: 2008-07-22 23:34:44 $,$Author: vsc $ 8 *************************************************************************/ #ifdef SCCS static char SccsId[] = "@(#)cdmgr.c 1.1 05/02/98"; #endif #include "Yap.h" #include "YapEval.h" #include "clause.h" #include "tracer.h" #include "yapio.h" #ifdef YAPOR #include "or.macros.h" #endif /* YAPOR */ #ifdef TABLING #include "tab.macros.h" #endif /* TABLING */ #if HAVE_STRING_H #include #endif #include #include #include #include static void retract_all(PredEntry *, int); static void add_first_static(PredEntry *, yamop *, int); static void add_first_dynamic(PredEntry *, yamop *, int); static void asserta_stat_clause(PredEntry *, yamop *, int); static void asserta_dynam_clause(PredEntry *, yamop *); static void assertz_stat_clause(PredEntry *, yamop *, int); static void assertz_dynam_clause(PredEntry *, yamop *); static void expand_consult(void); static int not_was_reconsulted(PredEntry *, Term, int); static int RemoveIndexation(PredEntry *); static Int number_of_clauses(USES_REGS1); static Int p_compile(USES_REGS1); static Int p_purge_clauses(USES_REGS1); static Int p_setspy(USES_REGS1); static Int p_rmspy(USES_REGS1); static Int p_startconsult(USES_REGS1); static Int p_showconslultlev(USES_REGS1); static Int p_endconsult(USES_REGS1); static Int p_undefined(USES_REGS1); static Int new_multifile(USES_REGS1); static Int p_is_multifile(USES_REGS1); static Int p_optimizer_on(USES_REGS1); static Int p_optimizer_off(USES_REGS1); static Int p_is_dynamic(USES_REGS1); static Int p_kill_dynamic(USES_REGS1); static Int p_is_profiled(USES_REGS1); static Int p_profile_info(USES_REGS1); static Int p_profile_reset(USES_REGS1); static Int p_is_call_counted(USES_REGS1); static Int p_call_count_info(USES_REGS1); static Int p_call_count_set(USES_REGS1); static Int p_call_count_reset(USES_REGS1); static void kill_first_log_iblock(LogUpdIndex *, LogUpdIndex *, PredEntry *); #define PredArity(p) (p->ArityOfPE) #define TRYCODE(G, F, N) ((N) < 5 ? (op_numbers)((int)F + (N)*3) : G) static void InitConsultStack(void) { CACHE_REGS LOCAL_ConsultLow = (consult_obj *)Yap_AllocCodeSpace(sizeof(consult_obj) * InitialConsultCapacity); if (LOCAL_ConsultLow == NULL) { Yap_Error(RESOURCE_ERROR_HEAP, TermNil, "No Heap Space in InitCodes"); return; } LOCAL_ConsultCapacity = InitialConsultCapacity; LOCAL_ConsultBase = LOCAL_ConsultSp = LOCAL_ConsultLow + LOCAL_ConsultCapacity; } void Yap_ResetConsultStack(void) { CACHE_REGS Yap_FreeCodeSpace((char *)LOCAL_ConsultLow); LOCAL_ConsultBase = LOCAL_ConsultSp = LOCAL_ConsultLow = NULL; LOCAL_ConsultCapacity = InitialConsultCapacity; } /****************************************************************** ADDING AND REMOVE INFO TO A PROCEDURE ******************************************************************/ /* * we have three kinds of predicates: dynamic DynamicPredFlag * static CompiledPredFlag fast FastPredFlag all the * database predicates are supported for dynamic predicates only abolish and * assertz are supported for static predicates no database predicates are * supportted for fast predicates */ PredEntry *Yap_get_pred(Term t, Term tmod, const char *pname) { Term t0 = t; restart: if (IsVarTerm(t)) { Yap_Error(INSTANTIATION_ERROR, t0, pname); return NULL; } else if (IsAtomTerm(t)) { PredEntry *ap = RepPredProp(Yap_GetPredPropByAtom(AtomOfTerm(t), tmod)); return ap; } else if (IsIntegerTerm(t) && tmod == IDB_MODULE) { return Yap_FindLUIntKey(IntegerOfTerm(t)); } else if (IsPairTerm(t)) { t = Yap_MkApplTerm(FunctorCsult, 1, &t); goto restart; } else if (IsApplTerm(t)) { Functor fun = FunctorOfTerm(t); if (IsExtensionFunctor(fun)) { Yap_Error(TYPE_ERROR_CALLABLE, Yap_PredicateIndicator(t, tmod), pname); return NULL; } if (fun == FunctorModule) { Term tmod = ArgOfTerm(1, t); if (IsVarTerm(tmod)) { Yap_Error(INSTANTIATION_ERROR, t0, pname); return NULL; } if (!IsAtomTerm(tmod)) { Yap_Error(TYPE_ERROR_ATOM, t0, pname); return NULL; } t = ArgOfTerm(2, t); goto restart; } PredEntry *ap = RepPredProp(Yap_GetPredPropByFunc(fun, tmod)); return ap; } else { Yap_Error(TYPE_ERROR_CALLABLE, t0, pname); } return NULL; } /** Look for a predicate with same functor as t, create a new one of it cannot find it. */ static PredEntry *new_pred(Term t, Term tmod, char *pname) { Term t0 = t; restart: if (IsVarTerm(t)) { Yap_Error(INSTANTIATION_ERROR, t0, pname); return NULL; } else if (IsAtomTerm(t)) { return RepPredProp(PredPropByAtom(AtomOfTerm(t), tmod)); } else if (IsIntegerTerm(t) && tmod == IDB_MODULE) { return Yap_FindLUIntKey(IntegerOfTerm(t)); } else if (IsApplTerm(t)) { Functor fun = FunctorOfTerm(t); if (IsExtensionFunctor(fun)) { Yap_Error(TYPE_ERROR_CALLABLE, Yap_PredicateIndicator(t, tmod), pname); return NULL; } if (fun == FunctorModule) { Term tmod = ArgOfTerm(1, t); if (IsVarTerm(tmod)) { Yap_Error(INSTANTIATION_ERROR, t0, pname); return NULL; } if (!IsAtomTerm(tmod)) { Yap_Error(TYPE_ERROR_ATOM, t0, pname); return NULL; } t = ArgOfTerm(2, t); goto restart; } return RepPredProp(PredPropByFunc(fun, tmod)); } else return NULL; } /****************************************************************** Mega Clauses ******************************************************************/ #define OrArgAdjust(P) #define TabEntryAdjust(P) #define DoubleInCodeAdjust(D) #define IntegerInCodeAdjust(D) #define IntegerAdjust(D) (D) #define PtoPredAdjust(X) (X) #define PtoOpAdjust(X) (X) #define PtoLUClauseAdjust(P) (P) #define PtoLUIndexAdjust(P) (P) #define XAdjust(X) (X) #define YAdjust(X) (X) #define AtomTermAdjust(X) (X) #define CellPtoHeapAdjust(X) (X) #define FuncAdjust(X) (X) #define CodeAddrAdjust(X) (X) #define CodeComposedTermAdjust(X) (X) #define ConstantAdjust(X) (X) #define ArityAdjust(X) (X) #define OpcodeAdjust(X) (X) #define ModuleAdjust(X) (X) #define ExternalFunctionAdjust(X) (X) #define AdjustSwitchTable(X, Y, Z) #define DBGroundTermAdjust(X) (X) #define rehash(A, B, C) static Term BlobTermInCodeAdjust(Term t) { CACHE_REGS #if TAGS_FAST_OPS return t - LOCAL_ClDiff; #else return t + LOCAL_ClDiff; #endif } static Term ConstantTermAdjust(Term t) { if (IsAtomTerm(t)) return AtomTermAdjust(t); return t; } #include "rclause.h" #ifdef DEBUG static UInt total_megaclause, total_released, nof_megaclauses; #endif void Yap_BuildMegaClause(PredEntry *ap) { CACHE_REGS StaticClause *cl; UInt sz; MegaClause *mcl; yamop *ptr; size_t required; UInt has_blobs = 0; if (ap->PredFlags & (DynamicPredFlag | LogUpdatePredFlag | MegaClausePredFlag #ifdef TABLING | TabledPredFlag #endif /* TABLING */ | UDIPredFlag) || ap->cs.p_code.FirstClause == NULL || ap->cs.p_code.NOfClauses < 16) { return; } cl = ClauseCodeToStaticClause(ap->cs.p_code.FirstClause); sz = cl->ClSize; while (TRUE) { if (!(cl->ClFlags & FactMask)) return; /* no mega clause, sorry */ if (cl->ClSize != sz) return; /* no mega clause, sorry */ if (cl->ClCode == ap->cs.p_code.LastClause) break; has_blobs |= (cl->ClFlags & HasBlobsMask); cl = cl->ClNext; } /* ok, we got the chance for a mega clause */ if (has_blobs) { sz -= sizeof(StaticClause); } else { sz -= (UInt)NEXTOP((yamop *)NULL, p) + sizeof(StaticClause); } required = sz * ap->cs.p_code.NOfClauses + sizeof(MegaClause) + (UInt)NEXTOP((yamop *)NULL, l); while (!(mcl = (MegaClause *)Yap_AllocCodeSpace(required))) { if (!Yap_growheap(FALSE, required, NULL)) { /* just fail, the system will keep on going */ return; } } #ifdef DEBUG total_megaclause += required; cl = ClauseCodeToStaticClause(ap->cs.p_code.FirstClause); total_released += ap->cs.p_code.NOfClauses * cl->ClSize; nof_megaclauses++; #endif Yap_ClauseSpace += required; /* cool, it's our turn to do the conversion */ mcl->ClFlags = MegaMask | has_blobs; mcl->ClSize = required; mcl->ClPred = ap; mcl->ClItemSize = sz; mcl->ClNext = NULL; cl = ClauseCodeToStaticClause(ap->cs.p_code.FirstClause); mcl->ClLine = cl->usc.ClLine; ptr = mcl->ClCode; while (TRUE) { memcpy((void *)ptr, (void *)cl->ClCode, sz); if (has_blobs) { LOCAL_ClDiff = (char *)(ptr) - (char *)cl->ClCode; restore_opcodes(ptr, NULL PASS_REGS); } ptr = (yamop *)((char *)ptr + sz); if (cl->ClCode == ap->cs.p_code.LastClause) break; cl = cl->ClNext; } ptr->opc = Yap_opcode(_Ystop); cl = ClauseCodeToStaticClause(ap->cs.p_code.FirstClause); /* recover the space spent on the original clauses */ while (TRUE) { StaticClause *ncl, *curcl = cl; ncl = cl->ClNext; Yap_InformOfRemoval(cl); Yap_ClauseSpace -= cl->ClSize; Yap_FreeCodeSpace((ADDR)cl); if (curcl->ClCode == ap->cs.p_code.LastClause) break; cl = ncl; } ap->cs.p_code.FirstClause = ap->cs.p_code.LastClause = mcl->ClCode; ap->PredFlags |= MegaClausePredFlag; Yap_inform_profiler_of_clause(mcl, (char *)mcl + required, ap, GPROF_MEGA); } static void split_megaclause(PredEntry *ap) { StaticClause *start = NULL, *prev = NULL; MegaClause *mcl; yamop *ptr; UInt ncls = ap->cs.p_code.NOfClauses, i; mcl = ClauseCodeToMegaClause(ap->cs.p_code.FirstClause); if (mcl->ClFlags & ExoMask) { Yap_Error(PERMISSION_ERROR_MODIFY_STATIC_PROCEDURE, TermNil, "while deleting clause from exo predicate %s/%d\n", RepAtom(NameOfFunctor(ap->FunctorOfPred))->StrOfAE, ap->ArityOfPE); return; } RemoveIndexation(ap); for (i = 0, ptr = mcl->ClCode; i < ncls; i++) { StaticClause *new = (StaticClause *)Yap_AllocCodeSpace( sizeof(StaticClause) + mcl->ClItemSize + (UInt)NEXTOP((yamop *)NULL, p)); if (new == NULL) { if (!Yap_growheap(FALSE, (sizeof(StaticClause) + mcl->ClItemSize) * (ncls - i), NULL)) { while (start) { StaticClause *cl = start; start = cl->ClNext; Yap_InformOfRemoval(cl); Yap_ClauseSpace -= cl->ClSize; Yap_FreeCodeSpace((char *)cl); } if (ap->ArityOfPE) { Yap_Error(RESOURCE_ERROR_HEAP, TermNil, "while breaking up mega clause for %s/%d\n", RepAtom(NameOfFunctor(ap->FunctorOfPred))->StrOfAE, ap->ArityOfPE); } else { Yap_Error(RESOURCE_ERROR_HEAP, TermNil, "while breaking up mega clause for %s\n", RepAtom((Atom)ap->FunctorOfPred)->StrOfAE); } return; } break; } Yap_ClauseSpace += sizeof(StaticClause) + mcl->ClItemSize + (UInt)NEXTOP((yamop *)NULL, p); new->ClFlags = StaticMask | FactMask; new->ClSize = mcl->ClItemSize; new->usc.ClLine = Yap_source_line_no(); new->ClNext = NULL; memcpy((void *)new->ClCode, (void *)ptr, mcl->ClItemSize); if (prev) { prev->ClNext = new; } else { start = new; } ptr = (yamop *)((char *)ptr + mcl->ClItemSize); prev = new; } ap->PredFlags &= ~MegaClausePredFlag; ap->cs.p_code.FirstClause = start->ClCode; ap->cs.p_code.LastClause = prev->ClCode; } /****************************************************************** Indexation Info ******************************************************************/ #define ByteAdr(X) ((Int) & (X)) /* Index a prolog pred, given its predicate entry */ /* ap is already locked. */ static void IPred(PredEntry *ap, UInt NSlots, yamop *next_pc) { yamop *BaseAddr; #ifdef DEBUG CACHE_REGS if (GLOBAL_Option['i' - 'a' + 1]) { Term tmod = ap->ModuleOfPred; if (!tmod) tmod = TermProlog; Yap_DebugPutc(stderr, '\t'); Yap_DebugPlWrite(tmod); Yap_DebugPutc(stderr, ':'); if (ap->ModuleOfPred == IDB_MODULE) { Term t = Deref(ARG1); if (IsAtomTerm(t)) { Yap_DebugPlWrite(t); } else if (IsIntegerTerm(t)) { Yap_DebugPlWrite(t); } else { Functor f = FunctorOfTerm(t); Atom At = NameOfFunctor(f); Yap_DebugPlWrite(MkAtomTerm(At)); Yap_DebugPutc(stderr, '/'); Yap_DebugPlWrite(MkIntTerm(ArityOfFunctor(f))); } } else { if (ap->ArityOfPE == 0) { Atom At = (Atom)ap->FunctorOfPred; Yap_DebugPlWrite(MkAtomTerm(At)); } else { Functor f = ap->FunctorOfPred; Atom At = NameOfFunctor(f); Yap_DebugPlWrite(MkAtomTerm(At)); Yap_DebugPutc(stderr, '/'); Yap_DebugPlWrite(MkIntTerm(ArityOfFunctor(f))); } } Yap_DebugPutc(stderr, '\n'); } #endif /* Do not try to index a dynamic predicate or one whithout args */ if (is_dynamic(ap)) { Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "trying to index a dynamic predicate"); return; } if ((BaseAddr = Yap_PredIsIndexable(ap, NSlots, next_pc)) != NULL) { ap->cs.p_code.TrueCodeOfPred = BaseAddr; ap->PredFlags |= IndexedPredFlag; } if (ap->PredFlags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag)) { if (ap->PredFlags & ProfiledPredFlag) { Yap_initProfiler(ap); } ap->OpcodeOfPred = Yap_opcode(_spy_pred); ap->CodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); #if defined(YAPOR) || defined(THREADS) } else if (ap->PredFlags & LogUpdatePredFlag && !(ap->PredFlags & ThreadLocalPredFlag) && ap->ModuleOfPred != IDB_MODULE) { ap->OpcodeOfPred = LOCKPRED_OPCODE; ap->CodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); #endif } else { ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred; ap->OpcodeOfPred = ap->CodeOfPred->opc; } #ifdef DEBUG if (GLOBAL_Option['i' - 'a' + 1]) Yap_DebugPutc(stderr, '\n'); #endif } void Yap_IPred(PredEntry *p, UInt NSlots, yamop *next_pc) { IPred(p, NSlots, next_pc); } #define GONEXT(TYPE) code_p = ((yamop *)(&(code_p->y_u.TYPE.next))) static void RemoveMainIndex(PredEntry *ap) { yamop *First = ap->cs.p_code.FirstClause; int spied = ap->PredFlags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag); ap->PredFlags &= ~IndexedPredFlag; if (First == NULL) { ap->cs.p_code.TrueCodeOfPred = FAILCODE; } else { ap->cs.p_code.TrueCodeOfPred = First; } if (First != NULL && spied) { ap->OpcodeOfPred = Yap_opcode(_spy_pred); ap->CodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); } else if (ap->cs.p_code.NOfClauses > 1 #ifdef TABLING || ap->PredFlags & TabledPredFlag #endif /* TABLING */ ) { ap->OpcodeOfPred = INDEX_OPCODE; ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); } else { ap->OpcodeOfPred = ap->cs.p_code.TrueCodeOfPred->opc; ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred; } #if defined(YAPOR) || defined(THREADS) if (ap->PredFlags & LogUpdatePredFlag && !(ap->PredFlags & ThreadLocalPredFlag) && ap->ModuleOfPred != IDB_MODULE) { ap->OpcodeOfPred = LOCKPRED_OPCODE; ap->CodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); } #endif } static void decrease_ref_counter(yamop *ptr, yamop *b, yamop *e, yamop *sc) { if (ptr != FAILCODE && ptr != sc && (ptr < b || ptr > e)) { LogUpdClause *cl = ClauseCodeToLogUpdClause(ptr); cl->ClRefCount--; if (cl->ClFlags & ErasedMask && !(cl->ClRefCount) && !(cl->ClFlags & InUseMask)) { /* last ref to the clause */ Yap_ErLogUpdCl(cl); } } } static yamop *release_wcls(yamop *cop, OPCODE ecs) { if (cop->opc == ecs) { cop->y_u.sssllp.s3--; if (!cop->y_u.sssllp.s3) { UInt sz = (UInt)NEXTOP((yamop *)NULL, sssllp) + cop->y_u.sssllp.s1 * sizeof(yamop *); LOCK(ExpandClausesListLock); #ifdef DEBUG Yap_expand_clauses_sz -= sz; Yap_ExpandClauses--; #endif if (cop->y_u.sssllp.p->PredFlags & LogUpdatePredFlag) { Yap_LUIndexSpace_EXT -= sz; } else { Yap_IndexSpace_EXT -= sz; } if (ExpandClausesFirst == cop) ExpandClausesFirst = cop->y_u.sssllp.snext; if (ExpandClausesLast == cop) { ExpandClausesLast = cop->y_u.sssllp.sprev; } if (cop->y_u.sssllp.sprev) { cop->y_u.sssllp.sprev->y_u.sssllp.snext = cop->y_u.sssllp.snext; } if (cop->y_u.sssllp.snext) { cop->y_u.sssllp.snext->y_u.sssllp.sprev = cop->y_u.sssllp.sprev; } UNLOCK(ExpandClausesListLock); Yap_InformOfRemoval(cop); Yap_FreeCodeSpace((char *)cop); } } return FAILCODE; } static void cleanup_dangling_indices(yamop *ipc, yamop *beg, yamop *end, yamop *suspend_code) { OPCODE ecs = Yap_opcode(_expand_clauses); while (ipc) { op_numbers op = Yap_op_from_opcode(ipc->opc); /* fprintf(stderr,"op: %d %p->%p\n", op, ipc, end);*/ switch (op) { case _Ystop: /* end of clause, for now */ return; case _index_dbref: case _index_blob: case _index_long: ipc = NEXTOP(ipc, e); break; case _lock_lu: case _unlock_lu: /* locking should be done already */ ipc = NEXTOP(ipc, e); case _retry_profiled: case _count_retry: ipc = NEXTOP(ipc, p); break; case _try_clause2: case _try_clause3: case _try_clause4: ipc = NEXTOP(ipc, l); break; case _retry2: case _retry3: case _retry4: decrease_ref_counter(ipc->y_u.l.l, beg, end, suspend_code); ipc = NEXTOP(ipc, l); break; case _retry: case _trust: decrease_ref_counter(ipc->y_u.Otapl.d, beg, end, suspend_code); ipc = NEXTOP(ipc, Otapl); break; case _try_clause: case _try_me: case _retry_me: case _profiled_trust_me: case _trust_me: case _count_trust_me: ipc = NEXTOP(ipc, Otapl); break; case _try_logical: case _retry_logical: case _count_retry_logical: case _profiled_retry_logical: { yamop *oipc = ipc; decrease_ref_counter(ipc->y_u.OtaLl.d->ClCode, beg, end, suspend_code); ipc = ipc->y_u.OtaLl.n; Yap_LUIndexSpace_CP -= (UInt)NEXTOP((yamop *)NULL, OtaLl); Yap_FreeCodeSpace((ADDR)oipc); #ifdef DEBUG Yap_DirtyCps--; Yap_FreedCps++; #endif } break; case _trust_logical: case _count_trust_logical: case _profiled_trust_logical: #ifdef DEBUG Yap_DirtyCps--; Yap_FreedCps++; #endif decrease_ref_counter(ipc->y_u.OtILl.d->ClCode, beg, end, suspend_code); Yap_LUIndexSpace_CP -= (UInt)NEXTOP((yamop *)NULL, OtILl); Yap_FreeCodeSpace((ADDR)ipc); return; case _enter_lu_pred: { yamop *oipc = ipc; if (ipc->y_u.Illss.I->ClFlags & InUseMask || ipc->y_u.Illss.I->ClRefCount) return; #ifdef DEBUG Yap_DirtyCps += ipc->y_u.Illss.s; Yap_LiveCps -= ipc->y_u.Illss.s; #endif ipc = ipc->y_u.Illss.l1; /* in case we visit again */ oipc->y_u.Illss.l1 = FAILCODE; oipc->y_u.Illss.s = 0; oipc->y_u.Illss.e = 0; } break; case _try_in: case _jump: case _jump_if_var: ipc->y_u.l.l = release_wcls(ipc->y_u.l.l, ecs); ipc = NEXTOP(ipc, l); break; /* instructions type xl */ case _jump_if_nonvar: ipc->y_u.xll.l1 = release_wcls(ipc->y_u.xll.l1, ecs); ipc = NEXTOP(ipc, xll); break; /* instructions type p */ case _user_switch: ipc = NEXTOP(ipc, lp); break; /* instructions type e */ case _switch_on_type: ipc->y_u.llll.l1 = release_wcls(ipc->y_u.llll.l1, ecs); ipc->y_u.llll.l2 = release_wcls(ipc->y_u.llll.l2, ecs); ipc->y_u.llll.l3 = release_wcls(ipc->y_u.llll.l3, ecs); ipc->y_u.llll.l4 = release_wcls(ipc->y_u.llll.l4, ecs); ipc = NEXTOP(ipc, llll); break; case _switch_list_nl: ipc->y_u.ollll.l1 = release_wcls(ipc->y_u.ollll.l1, ecs); ipc->y_u.ollll.l2 = release_wcls(ipc->y_u.ollll.l2, ecs); ipc->y_u.ollll.l3 = release_wcls(ipc->y_u.ollll.l3, ecs); ipc->y_u.ollll.l4 = release_wcls(ipc->y_u.ollll.l4, ecs); ipc = NEXTOP(ipc, ollll); break; case _switch_on_arg_type: ipc->y_u.xllll.l1 = release_wcls(ipc->y_u.xllll.l1, ecs); ipc->y_u.xllll.l2 = release_wcls(ipc->y_u.xllll.l2, ecs); ipc->y_u.xllll.l3 = release_wcls(ipc->y_u.xllll.l3, ecs); ipc->y_u.xllll.l4 = release_wcls(ipc->y_u.xllll.l4, ecs); ipc = NEXTOP(ipc, xllll); break; case _switch_on_sub_arg_type: ipc->y_u.sllll.l1 = release_wcls(ipc->y_u.sllll.l1, ecs); ipc->y_u.sllll.l2 = release_wcls(ipc->y_u.sllll.l2, ecs); ipc->y_u.sllll.l3 = release_wcls(ipc->y_u.sllll.l3, ecs); ipc->y_u.sllll.l4 = release_wcls(ipc->y_u.sllll.l4, ecs); ipc = NEXTOP(ipc, sllll); break; case _if_not_then: ipc = NEXTOP(ipc, clll); break; case _switch_on_func: case _if_func: case _go_on_func: case _switch_on_cons: case _if_cons: case _go_on_cons: /* make sure we don't leave dangling references to memory that is going to * be removed */ ipc->y_u.sssl.l = NULL; ipc = NEXTOP(ipc, sssl); break; case _op_fail: return; default: Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "Bug in Indexing Code: opcode %d", op); return; } #if defined(YAPOR) || defined(THREADS) ipc = (yamop *)((CELL)ipc & ~1); #endif } } static void decrease_log_indices(LogUpdIndex *c, yamop *suspend_code) { /* decrease all reference counters */ yamop *beg = c->ClCode, *end, *ipc; if (c->ClFlags & SwitchTableMask) { CELL *end = (CELL *)((char *)c + c->ClSize); CELL *beg = (CELL *)(c->ClCode); OPCODE ecs = Yap_opcode(_expand_clauses); while (beg < end) { yamop **x = (yamop **)(beg + 1); beg += 2; *x = release_wcls(*x, ecs); } return; } end = (yamop *)((CODEADDR)c + c->ClSize); ipc = beg; cleanup_dangling_indices(ipc, beg, end, suspend_code); } static void kill_static_child_indxs(StaticIndex *indx, int in_use) { StaticIndex *cl = indx->ChildIndex; while (cl != NULL) { StaticIndex *next = cl->SiblingIndex; kill_static_child_indxs(cl, in_use); cl = next; } if (in_use) { LOCK(DeadStaticIndicesLock); indx->SiblingIndex = DeadStaticIndices; indx->ChildIndex = NULL; DeadStaticIndices = indx; UNLOCK(DeadStaticIndicesLock); } else { Yap_InformOfRemoval(indx); if (indx->ClFlags & SwitchTableMask) Yap_IndexSpace_SW -= indx->ClSize; else Yap_IndexSpace_Tree -= indx->ClSize; Yap_FreeCodeSpace((char *)indx); } } static void kill_children(LogUpdIndex *c, PredEntry *ap) { LogUpdIndex *ncl; c->ClRefCount++; ncl = c->ChildIndex; /* kill children */ while (ncl) { kill_first_log_iblock(ncl, c, ap); ncl = c->ChildIndex; } c->ClRefCount--; } /* assumes c is already locked */ static void kill_off_lu_block(LogUpdIndex *c, LogUpdIndex *parent, PredEntry *ap) { /* first, make sure that I killed off all my children, some children may remain in case I have tables as children */ if (parent != NULL) { /* sat bye bye */ /* decrease refs */ parent->ClRefCount--; if (parent->ClFlags & ErasedMask && !(parent->ClFlags & InUseMask) && parent->ClRefCount == 0) { /* cool, I can erase the father too. */ if (parent->ClFlags & SwitchRootMask) { kill_off_lu_block(parent, NULL, ap); } else { kill_off_lu_block(parent, parent->ParentIndex, ap); } } } decrease_log_indices(c, (yamop *)&(ap->cs.p_code.ExpandCode)); /* remove from list */ if (c->SiblingIndex) c->SiblingIndex->PrevSiblingIndex = c->PrevSiblingIndex; if (c->PrevSiblingIndex) { c->PrevSiblingIndex->SiblingIndex = c->SiblingIndex; } else { DBErasedIList = c->SiblingIndex; } Yap_InformOfRemoval(c); if (c->ClFlags & SwitchTableMask) Yap_LUIndexSpace_SW -= c->ClSize; else { Yap_LUIndexSpace_Tree -= c->ClSize; } Yap_FreeCodeSpace((char *)c); } static void kill_first_log_iblock(LogUpdIndex *c, LogUpdIndex *parent, PredEntry *ap) { /* parent is always locked, now I lock myself */ if (parent != NULL) { /* remove myself from parent */ if (c == parent->ChildIndex) { parent->ChildIndex = c->SiblingIndex; if (parent->ChildIndex) { parent->ChildIndex->PrevSiblingIndex = NULL; } } else { c->PrevSiblingIndex->SiblingIndex = c->SiblingIndex; if (c->SiblingIndex) { c->SiblingIndex->PrevSiblingIndex = c->PrevSiblingIndex; } } } else { /* I am top node */ if (ap->cs.p_code.TrueCodeOfPred == c->ClCode) { RemoveMainIndex(ap); } } decrease_log_indices(c, (yamop *)&(ap->cs.p_code.ExpandCode)); /* make sure that a child cannot remove us */ kill_children(c, ap); /* check if we are still the main index */ /* always add to erased list */ c->SiblingIndex = DBErasedIList; c->PrevSiblingIndex = NULL; if (DBErasedIList) DBErasedIList->PrevSiblingIndex = c; DBErasedIList = c; if (!((c->ClFlags & InUseMask) || c->ClRefCount)) { kill_off_lu_block(c, parent, ap); } else { if (c->ClFlags & ErasedMask) return; c->ClFlags |= ErasedMask; /* try to move up, so that we don't hold a switch table */ if (parent != NULL && parent->ClFlags & SwitchTableMask) { c->ParentIndex = parent->ParentIndex; parent->ParentIndex->ClRefCount++; parent->ClRefCount--; } } } static void kill_top_static_iblock(StaticIndex *c, PredEntry *ap) { kill_static_child_indxs(c, Yap_static_in_use(ap, TRUE)); RemoveMainIndex(ap); } void Yap_kill_iblock(ClauseUnion *blk, ClauseUnion *parent_blk, PredEntry *ap) { if (ap->PredFlags & LogUpdatePredFlag) { LogUpdIndex *c = (LogUpdIndex *)blk; if (parent_blk != NULL) { LogUpdIndex *cl = (LogUpdIndex *)parent_blk; #if MULTIPLE_STACKS /* protect against attempts at erasing */ cl->ClRefCount++; #endif kill_first_log_iblock(c, cl, ap); #if MULTIPLE_STACKS cl->ClRefCount--; #endif } else { kill_first_log_iblock(c, NULL, ap); } } else { StaticIndex *c = (StaticIndex *)blk; if (parent_blk != NULL) { StaticIndex *cl = parent_blk->si.ChildIndex; if (cl == c) { parent_blk->si.ChildIndex = c->SiblingIndex; } else { while (cl->SiblingIndex != c) { cl = cl->SiblingIndex; } cl->SiblingIndex = c->SiblingIndex; } } kill_static_child_indxs(c, Yap_static_in_use(ap, TRUE)); } } /* This predicate is supposed to be called with a lock on the current predicate */ void Yap_ErLogUpdIndex(LogUpdIndex *clau) { if (clau->ClFlags & ErasedMask) { if (!clau->ClRefCount) { decrease_log_indices(clau, (yamop *)&(clau->ClPred->cs.p_code.ExpandCode)); if (clau->ClFlags & SwitchRootMask) { kill_off_lu_block(clau, NULL, clau->ClPred); } else { kill_off_lu_block(clau, clau->ParentIndex, clau->ClPred); } } /* otherwise, nothing I can do, I have been erased already */ return; } if (clau->ClFlags & SwitchRootMask) { kill_first_log_iblock(clau, NULL, clau->ClPred); } else { #if MULTIPLE_STACKS /* protect against attempts at erasing */ clau->ClRefCount++; #endif kill_first_log_iblock(clau, clau->ParentIndex, clau->ClPred); #if MULTIPLE_STACKS /* protect against attempts at erasing */ clau->ClRefCount--; #endif } } /* Routine used when wanting to remove the indexation */ /* ap is known to already have been locked for WRITING */ static int RemoveIndexation(PredEntry *ap) { if (ap->OpcodeOfPred == INDEX_OPCODE) { return TRUE; } if (ap->PredFlags & LogUpdatePredFlag) { kill_first_log_iblock(ClauseCodeToLogUpdIndex(ap->cs.p_code.TrueCodeOfPred), NULL, ap); } else { StaticIndex *cl; cl = ClauseCodeToStaticIndex(ap->cs.p_code.TrueCodeOfPred); kill_top_static_iblock(cl, ap); } return TRUE; } int Yap_RemoveIndexation(PredEntry *ap) { return RemoveIndexation(ap); } /****************************************************************** Adding clauses ******************************************************************/ #define assertz 0 #define consult 1 #define asserta 2 /* p is already locked */ static void retract_all(PredEntry *p, int in_use) { yamop *q; q = p->cs.p_code.FirstClause; if (q != NULL) { if (p->PredFlags & LogUpdatePredFlag) { LogUpdClause *cl = ClauseCodeToLogUpdClause(q); do { LogUpdClause *ncl = cl->ClNext; Yap_ErLogUpdCl(cl); cl = ncl; } while (cl != NULL); } else if (p->PredFlags & MegaClausePredFlag) { MegaClause *cl = ClauseCodeToMegaClause(q); if (in_use || cl->ClFlags & HasBlobsMask) { LOCK(DeadMegaClausesLock); cl->ClNext = DeadMegaClauses; DeadMegaClauses = cl; UNLOCK(DeadMegaClausesLock); } else { Yap_InformOfRemoval(cl); Yap_ClauseSpace -= cl->ClSize; Yap_FreeCodeSpace((char *)cl); } /* make sure this is not a MegaClause */ p->PredFlags &= ~MegaClausePredFlag; p->cs.p_code.NOfClauses = 0; } else { StaticClause *cl = ClauseCodeToStaticClause(q); while (cl) { StaticClause *ncl = cl->ClNext; if (in_use || cl->ClFlags & HasBlobsMask) { LOCK(DeadStaticClausesLock); cl->ClNext = DeadStaticClauses; DeadStaticClauses = cl; UNLOCK(DeadStaticClausesLock); } else { Yap_InformOfRemoval(cl); Yap_ClauseSpace -= cl->ClSize; Yap_FreeCodeSpace((char *)cl); } p->cs.p_code.NOfClauses--; if (!ncl) break; cl = ncl; } } } p->cs.p_code.FirstClause = NULL; p->cs.p_code.LastClause = NULL; if (is_live(p)) { p->OpcodeOfPred = FAIL_OPCODE; } else { p->OpcodeOfPred = UNDEF_OPCODE; p->PredFlags |= UndefPredFlag; } p->cs.p_code.TrueCodeOfPred = p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); if (trueGlobalPrologFlag(PROFILING_FLAG)) { p->PredFlags |= ProfiledPredFlag; if (!Yap_initProfiler(p)) { return; } } else p->PredFlags &= ~ProfiledPredFlag; if (CALL_COUNTING) { p->PredFlags |= CountPredFlag; } else p->PredFlags &= ~CountPredFlag; Yap_PutValue(AtomAbol, MkAtomTerm(AtomTrue)); } bool Yap_unknown(Term t) { if (t == TermFastFail) { UndefCode->OpcodeOfPred = FAIL_OPCODE; return true; } else if (t == TermError) { UndefCode->OpcodeOfPred = UndefCode->CodeOfPred->opc; return true; } else if (t == TermFail) { UndefCode->OpcodeOfPred = UndefCode->CodeOfPred->opc; return true; } else if (t == TermWarning) { UndefCode->OpcodeOfPred = UndefCode->CodeOfPred->opc; return true; } return false; } static int source_pred(PredEntry *p, yamop *q) { if (p->PredFlags & (DynamicPredFlag | LogUpdatePredFlag)) return FALSE; if (p->PredFlags & MultiFileFlag) return TRUE; if (trueGlobalPrologFlag(SOURCE_FLAG)) { return TRUE; } return FALSE; } /* p is already locked */ static void add_first_static(PredEntry *p, yamop *cp, int spy_flag) { CACHE_REGS yamop *pt = cp; #ifdef TABLING if (is_tabled(p)) { p->OpcodeOfPred = INDEX_OPCODE; p->cs.p_code.TrueCodeOfPred = p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } #endif /* TABLING */ p->cs.p_code.TrueCodeOfPred = pt; p->cs.p_code.FirstClause = p->cs.p_code.LastClause = cp; p->OpcodeOfPred = pt->opc; #if defined(YAPOR) || defined(THREADS) if (p->PredFlags & LogUpdatePredFlag && !(p->PredFlags & ThreadLocalPredFlag) && p->ModuleOfPred != IDB_MODULE) { p->OpcodeOfPred = LOCKPRED_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } else #endif p->CodeOfPred = pt; p->cs.p_code.NOfClauses = 1; if (trueGlobalPrologFlag(PROFILING_FLAG)) { p->PredFlags |= ProfiledPredFlag; if (!Yap_initProfiler(p)) { return; } spy_flag = TRUE; } else { p->PredFlags &= ~ProfiledPredFlag; } if (CALL_COUNTING) { p->PredFlags |= CountPredFlag; spy_flag = TRUE; } else { p->PredFlags &= ~CountPredFlag; } if (spy_flag) { p->OpcodeOfPred = Yap_opcode(_spy_pred); p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } if (source_pred(p, cp)) { p->PredFlags |= SourcePredFlag; } if (!(p->PredFlags & MultiFileFlag) && p->src.OwnerFile == AtomNil) p->src.OwnerFile = Yap_ConsultingFile(PASS_REGS1); } /* p is already locked */ static void add_first_dynamic(PredEntry *p, yamop *cp, int spy_flag) { yamop *ncp = ((DynamicClause *)NULL)->ClCode; DynamicClause *cl; if (trueGlobalPrologFlag(PROFILING_FLAG)) { p->PredFlags |= ProfiledPredFlag; if (!Yap_initProfiler(p)) { return; } spy_flag = true; } else { p->PredFlags &= ~ProfiledPredFlag; } if (CALL_COUNTING) { p->PredFlags |= CountPredFlag; spy_flag = true; } else { p->PredFlags &= ~CountPredFlag; } #ifdef YAPOR p->PredFlags |= SequentialPredFlag; #endif /* YAPOR */ /* allocate starter block, containing info needed to start execution, * that is a try_mark to start the code and a fail to finish things up */ cl = (DynamicClause *)Yap_AllocCodeSpace( (Int)NEXTOP(NEXTOP(NEXTOP(ncp, Otapl), e), l)); if (cl == NIL) { Yap_Error(RESOURCE_ERROR_HEAP, TermNil, "Heap crashed against Stacks"); return; } Yap_ClauseSpace += (Int)NEXTOP(NEXTOP(NEXTOP(ncp, Otapl), e), l); /* skip the first entry, this contains the back link and will always be empty for this entry */ ncp = (yamop *)(((CELL *)ncp) + 1); /* next we have the flags. For this block mainly say whether we are * being spied */ cl->ClFlags = DynamicMask; ncp = cl->ClCode; INIT_LOCK(cl->ClLock); INIT_CLREF_COUNT(cl); /* next, set the first instruction to execute in the dyamic * predicate */ if (spy_flag) p->OpcodeOfPred = ncp->opc = Yap_opcode(_spy_or_trymark); else p->OpcodeOfPred = ncp->opc = Yap_opcode(_try_and_mark); ncp->y_u.Otapl.s = p->ArityOfPE; ncp->y_u.Otapl.p = p; ncp->y_u.Otapl.d = cp; /* This is the point we enter the code */ p->cs.p_code.TrueCodeOfPred = p->CodeOfPred = ncp; p->cs.p_code.NOfClauses = 1; #if defined(YAPOR) || defined(THREADS) if (p->PredFlags & LogUpdatePredFlag && !(p->PredFlags & ThreadLocalPredFlag) && p->ModuleOfPred != IDB_MODULE) { p->OpcodeOfPred = LOCKPRED_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } #endif /* set the first clause to have a retry and mark which will * backtrack to the previous block */ if (p->PredFlags & ProfiledPredFlag) cp->opc = Yap_opcode(_profiled_retry_and_mark); else if (p->PredFlags & CountPredFlag) cp->opc = Yap_opcode(_count_retry_and_mark); else cp->opc = Yap_opcode(_retry_and_mark); cp->y_u.Otapl.s = p->ArityOfPE; cp->y_u.Otapl.p = p; cp->y_u.Otapl.d = ncp; /* also, keep a backpointer for the days you delete the clause */ ClauseCodeToDynamicClause(cp)->ClPrevious = ncp; /* Don't forget to say who is the only clause for the predicate so far */ p->cs.p_code.LastClause = p->cs.p_code.FirstClause = cp; /* we're only missing what to do when we actually exit the procedure */ ncp = NEXTOP(ncp, Otapl); /* and the last instruction to execute to exit the predicate, note the retry is pointing to this pseudo clause */ ncp->opc = Yap_opcode(_trust_fail); /* we're only missing what to do when we actually exit the procedure */ /* and close the code */ ncp = NEXTOP(ncp, e); ncp->opc = Yap_opcode(_Ystop); ncp->y_u.l.l = cl->ClCode; // if (!(p->PredFlags & MultiFileFlag) && p->src.OwnerFile == AtomNil) // p->src.OwnerFile = Yap_ConsultingFile(PASS_REGS1); } /* p is already locked */ static void asserta_stat_clause(PredEntry *p, yamop *q, int spy_flag) { StaticClause *cl = ClauseCodeToStaticClause(q); p->cs.p_code.NOfClauses++; if (is_logupd(p)) { LogUpdClause *clp = ClauseCodeToLogUpdClause(p->cs.p_code.FirstClause), *clq = ClauseCodeToLogUpdClause(q); clq->ClPrev = NULL; clq->ClNext = clp; clp->ClPrev = clq; p->cs.p_code.FirstClause = q; if (p->PredFlags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag)) { p->OpcodeOfPred = Yap_opcode(_spy_pred); p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } else if (!(p->PredFlags & IndexedPredFlag)) { p->OpcodeOfPred = INDEX_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } #if defined(YAPOR) || defined(THREADS) if (p->ModuleOfPred != IDB_MODULE && !(p->PredFlags & ThreadLocalPredFlag)) { p->OpcodeOfPred = LOCKPRED_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } #endif return; } cl->ClNext = ClauseCodeToStaticClause(p->cs.p_code.FirstClause); p->cs.p_code.FirstClause = q; p->cs.p_code.TrueCodeOfPred = q; if (p->PredFlags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag)) { p->OpcodeOfPred = Yap_opcode(_spy_pred); p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } else if (!(p->PredFlags & IndexedPredFlag)) { p->OpcodeOfPred = INDEX_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } } /* p is already locked */ static void asserta_dynam_clause(PredEntry *p, yamop *cp) { yamop *q; DynamicClause *cl = ClauseCodeToDynamicClause(cp); q = cp; LOCK(ClauseCodeToDynamicClause(p->cs.p_code.FirstClause)->ClLock); /* also, keep backpointers for the days we'll delete all the clause */ ClauseCodeToDynamicClause(p->cs.p_code.FirstClause)->ClPrevious = q; cl->ClPrevious = (yamop *)(p->CodeOfPred); cl->ClFlags |= DynamicMask; UNLOCK(ClauseCodeToDynamicClause(p->cs.p_code.FirstClause)->ClLock); q->y_u.Otapl.d = p->cs.p_code.FirstClause; q->y_u.Otapl.s = p->ArityOfPE; q->y_u.Otapl.p = p; if (p->PredFlags & ProfiledPredFlag) cp->opc = Yap_opcode(_profiled_retry_and_mark); else if (p->PredFlags & CountPredFlag) cp->opc = Yap_opcode(_count_retry_and_mark); else cp->opc = Yap_opcode(_retry_and_mark); cp->y_u.Otapl.s = p->ArityOfPE; cp->y_u.Otapl.p = p; p->cs.p_code.FirstClause = cp; q = p->CodeOfPred; q->y_u.Otapl.d = cp; q->y_u.Otapl.s = p->ArityOfPE; q->y_u.Otapl.p = p; } /* p is already locked */ static void assertz_stat_clause(PredEntry *p, yamop *cp, int spy_flag) { yamop *pt; p->cs.p_code.NOfClauses++; pt = p->cs.p_code.LastClause; if (is_logupd(p)) { LogUpdClause *clp = ClauseCodeToLogUpdClause(cp), *clq = ClauseCodeToLogUpdClause(pt); clq->ClNext = clp; clp->ClPrev = clq; clp->ClNext = NULL; p->cs.p_code.LastClause = cp; if (!(p->PredFlags & IndexedPredFlag)) { p->OpcodeOfPred = INDEX_OPCODE; p->cs.p_code.TrueCodeOfPred = p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } #if defined(YAPOR) || defined(THREADS) if (p->ModuleOfPred != IDB_MODULE && !(p->PredFlags & ThreadLocalPredFlag)) { p->OpcodeOfPred = LOCKPRED_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } #endif if (p->PredFlags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag)) { p->OpcodeOfPred = Yap_opcode(_spy_pred); p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } return; } else { StaticClause *cl = ClauseCodeToStaticClause(pt); cl->ClNext = ClauseCodeToStaticClause(cp); } if (p->cs.p_code.FirstClause == p->cs.p_code.LastClause) { if (!(p->PredFlags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag))) { p->OpcodeOfPred = INDEX_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } } p->cs.p_code.LastClause = cp; } /* p is already locked */ static void assertz_dynam_clause(PredEntry *p, yamop *cp) { yamop *q; DynamicClause *cl = ClauseCodeToDynamicClause(cp); q = p->cs.p_code.LastClause; LOCK(ClauseCodeToDynamicClause(q)->ClLock); q->y_u.Otapl.d = cp; p->cs.p_code.LastClause = cp; /* also, keep backpointers for the days we'll delete all the clause */ cl->ClPrevious = q; cl->ClFlags |= DynamicMask; UNLOCK(ClauseCodeToDynamicClause(q)->ClLock); q = (yamop *)cp; if (p->PredFlags & ProfiledPredFlag) q->opc = Yap_opcode(_profiled_retry_and_mark); else if (p->PredFlags & CountPredFlag) q->opc = Yap_opcode(_count_retry_and_mark); else q->opc = Yap_opcode(_retry_and_mark); q->y_u.Otapl.d = p->CodeOfPred; q->y_u.Otapl.s = p->ArityOfPE; q->y_u.Otapl.p = p; p->cs.p_code.NOfClauses++; } void Yap_AssertzClause(PredEntry *p, yamop *cp) { if (p->PredFlags & DynamicPredFlag) { if (p->cs.p_code.FirstClause == NULL) { add_first_dynamic(p, cp, FALSE); } else { assertz_dynam_clause(p, cp); } } else { if (p->cs.p_code.FirstClause == NULL) { add_first_static(p, cp, FALSE); } else { assertz_stat_clause(p, cp, FALSE); } } } static void expand_consult(void) { CACHE_REGS consult_obj *new_cl, *new_cs; UInt OldConsultCapacity = LOCAL_ConsultCapacity; /* now double consult capacity */ LOCAL_ConsultCapacity += InitialConsultCapacity; /* I assume it always works ;-) */ while ((new_cl = (consult_obj *)Yap_AllocCodeSpace( sizeof(consult_obj) * LOCAL_ConsultCapacity)) == NULL) { if (!Yap_growheap(FALSE, sizeof(consult_obj) * LOCAL_ConsultCapacity, NULL)) { Yap_Error(RESOURCE_ERROR_HEAP, TermNil, LOCAL_ErrorMessage); return; } } new_cs = new_cl + InitialConsultCapacity; /* start copying */ memcpy((void *)new_cs, (void *)LOCAL_ConsultLow, OldConsultCapacity * sizeof(consult_obj)); /* copying done, release old space */ Yap_FreeCodeSpace((char *)LOCAL_ConsultLow); /* next, set up pointers correctly */ new_cs += (LOCAL_ConsultSp - LOCAL_ConsultLow); /* put LOCAL_ConsultBase at same offset as before move */ LOCAL_ConsultBase = new_cl + ((LOCAL_ConsultBase - LOCAL_ConsultLow) + InitialConsultCapacity); /* new consult pointer */ LOCAL_ConsultSp = new_cl + ((LOCAL_ConsultSp - LOCAL_ConsultLow) + InitialConsultCapacity); /* new end of memory */ LOCAL_ConsultLow = new_cl; } static int not_was_reconsulted(PredEntry *p, Term t, int mode) { CACHE_REGS register consult_obj *fp; Prop p0 = AbsProp((PropEntry *)p); if (p == LOCAL_LastAssertedPred) return FALSE; if (!LOCAL_ConsultSp) { InitConsultStack(); } if (p->cs.p_code.NOfClauses) { for (fp = LOCAL_ConsultSp; fp < LOCAL_ConsultBase; ++fp) if (fp->p == p0) break; } else { fp = LOCAL_ConsultBase; } if (fp != LOCAL_ConsultBase) { LOCAL_LastAssertedPred = p; return false; /* careful */ } else if (mode) { // consulting again a predicate in the original file. if ((p->cs.p_code.NOfClauses && p->src.OwnerFile == Yap_ConsultingFile(PASS_REGS1) && p->src.OwnerFile != AtomNil && !(p->PredFlags & MultiFileFlag) && p->src.OwnerFile != AtomUserIn)) { // if (p->ArityOfPE) // printf("+ %s %s //%d\n",NameOfFunctor(p->FunctorOfPred)->StrOfAE,p->src.OwnerFile->StrOfAE, // p->cs.p_code.NOfClauses); retract_all(p, Yap_static_in_use(p, TRUE)); } // printf("- %s //%s\n",NameOfFunctor(p->FunctorOfPred)->StrOfAE,p->src.OwnerFile->StrOfAE); } if (mode) { if (LOCAL_ConsultSp <= LOCAL_ConsultLow + 6) { expand_consult(); } --LOCAL_ConsultSp; LOCAL_ConsultSp->p = p0; if (LOCAL_ConsultBase != LOCAL_ConsultLow + LOCAL_ConsultCapacity && LOCAL_ConsultBase[1].mode && !(p->PredFlags & MultiFileFlag)) /* we are in reconsult mode */ { retract_all(p, Yap_static_in_use(p, TRUE)); } // p->src.OwnerFile = Yap_ConsultingFile(PASS_REGS1); } LOCAL_LastAssertedPred = p; return TRUE; /* careful */ } static yamop * addcl_permission_error(const char *file, const char *function, int lineno, AtomEntry *ap, Int Arity, int in_use) { CACHE_REGS Term culprit; if (Arity == 0) culprit = MkAtomTerm(AbsAtom(ap)); else culprit = Yap_MkNewApplTerm(Yap_MkFunctor(AbsAtom(ap),Arity), Arity); return (in_use ? (Arity == 0 ? Yap_Error__(false, file, function, lineno, PERMISSION_ERROR_MODIFY_STATIC_PROCEDURE, culprit, "static predicate %s is in use", ap->StrOfAE) : Yap_Error__(false, file, function, lineno, PERMISSION_ERROR_MODIFY_STATIC_PROCEDURE, culprit, "static predicate %s/" Int_FORMAT " is in use", ap->StrOfAE, Arity) ) : (Arity == 0 ? Yap_Error__(false, file, function, lineno, PERMISSION_ERROR_MODIFY_STATIC_PROCEDURE, culprit, "system predicate %s is in use", ap->StrOfAE) : Yap_Error__(false, file, function, lineno, PERMISSION_ERROR_MODIFY_STATIC_PROCEDURE, culprit, "system predicate %s/" Int_FORMAT, ap->StrOfAE, Arity) ) ); } PredEntry *Yap_PredFromClause(Term t USES_REGS) { Term cmod = LOCAL_SourceModule; arity_t extra_arity = 0; if (IsVarTerm(t)) return NULL; while (IsApplTerm(t)) { Functor f = FunctorOfTerm(t); if (f == FunctorModule) { // module cmod = ArgOfTerm(1, t); if (!IsAtomTerm(cmod)) return NULL; t = ArgOfTerm(2, t); } else if (f == FunctorAssert) { t = ArgOfTerm(1, t); } else if (f == FunctorComma && extra_arity == 2) { t = ArgOfTerm(1, t); } else if (f == FunctorDoubleArrow) { extra_arity = 2; t = ArgOfTerm(1, t); } else if (f == FunctorQuery || f == FunctorAssert1) { // directives return NULL; } else { if (extra_arity) { f = Yap_MkFunctor(NameOfFunctor(f), ArityOfFunctor(f) + 2); } return RepPredProp(Yap_GetPredPropByFunc(f, cmod)); } } if (IsAtomTerm(t)) { if (extra_arity) { Functor f = Yap_MkFunctor(AtomOfTerm(t), 2); return RepPredProp(Yap_GetPredPropByFunc(f, cmod)); } return RepPredProp(Yap_GetPredPropByAtom(AtomOfTerm(t), cmod)); } // ints, lists return NULL; } bool Yap_discontiguous(PredEntry *ap, Term mode USES_REGS) { register consult_obj *fp; if (ap->PredFlags & (DiscontiguousPredFlag | MultiFileFlag) || falseGlobalPrologFlag(DISCONTIGUOUS_WARNINGS_FLAG)) return false; if ((mode != TermConsult && mode != TermReconsult)) return false; if (!LOCAL_ConsultSp) { return false; } if (ap == LOCAL_LastAssertedPred) return false; if (ap->cs.p_code.NOfClauses) { Term repeat = AbsPair((CELL *)AbsPredProp(ap)); for (fp = LOCAL_ConsultSp; fp < LOCAL_ConsultBase; ++fp) if (fp->p == AbsPredProp(ap)) { // detect repeated warnings if (LOCAL_ConsultSp == LOCAL_ConsultLow + 1) { expand_consult(); } --LOCAL_ConsultSp; LOCAL_ConsultSp->r = repeat; return true; } else if (fp->r == repeat && ap->cs.p_code.NOfClauses > 4) { return false; } } return false; } static Int p_is_discontiguous(USES_REGS1) { /* '$is_multifile'(+S,+Mod) */ PredEntry *pe; Int out; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "discontiguous"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(27, pe); out = (pe->PredFlags & DiscontiguousPredFlag); UNLOCKPE(44, pe); return (out); } static Int p_new_discontiguous(USES_REGS1) { /* '$new_discontiguous'(+N,+Ar,+Mod) */ Atom at; int arity; PredEntry *pe; Term t = Deref(ARG1); Term mod = Deref(ARG3); if (IsVarTerm(t)) return false; if (IsAtomTerm(t)) at = AtomOfTerm(t); else return false; t = Deref(ARG2); if (IsVarTerm(t)) return false; if (IsIntTerm(t)) arity = IntOfTerm(t); else return false; if (arity == 0) pe = RepPredProp(PredPropByAtom(at, mod)); else pe = RepPredProp(PredPropByFunc(Yap_MkFunctor(at, arity), mod)); PELOCK(26, pe); pe->PredFlags |= DiscontiguousPredFlag; /* mutifile-predicates are weird, they do not seat really on the default * module */ if (pe->cs.p_code.NOfClauses == 0) { pe->CodeOfPred = pe->cs.p_code.TrueCodeOfPred = FAILCODE; pe->OpcodeOfPred = FAIL_OPCODE; } UNLOCKPE(43, pe); return (TRUE); } bool Yap_multiple(PredEntry *ap, Term mode USES_REGS) { register consult_obj *fp; if ((ap->PredFlags & (MultiFileFlag | LogUpdatePredFlag | DynamicPredFlag)) || mode != TermReconsult) return false; if (LOCAL_consult_level == 0) return false; for (fp = LOCAL_ConsultSp; fp < LOCAL_ConsultBase; ++fp) if (fp->p == AbsPredProp(ap)) { return false; } return ap->cs.p_code.NOfClauses > 0 && ap->src.OwnerFile != AtomNil && Yap_ConsultingFile(PASS_REGS1) != ap->src.OwnerFile && LOCAL_Including != MkAtomTerm(ap->src.OwnerFile); } static int is_fact(Term t) { Term a1; if (IsAtomTerm(t)) return TRUE; if (FunctorOfTerm(t) != FunctorAssert) return TRUE; a1 = ArgOfTerm(2, t); if (a1 == MkAtomTerm(AtomTrue)) return TRUE; return FALSE; } Int Yap_source_line_no(void) { CACHE_REGS return LOCAL_SourceFileLineno; } Atom Yap_source_file_name(void) { CACHE_REGS if (LOCAL_SourceFileName) return LOCAL_SourceFileName; return AtomNil; } /** * @brief we cannot add clauses to the proceduree * * @param p predicate * * @return boolean */ bool Yap_constPred(PredEntry *p) { pred_flags_t pflags; pflags = p->PredFlags; if (pflags & ((UserCPredFlag | CArgsPredFlag | NumberDBPredFlag | AtomDBPredFlag | TestPredFlag | AsmPredFlag | CPredFlag | BinaryPredFlag))) return true; if (p->PredFlags & (SysExportPredFlag | MultiFileFlag | DynamicPredFlag | LogUpdatePredFlag)) return false; if (Yap_isSystemModule(p->ModuleOfPred)) { if (p->cs.p_code.NOfClauses == 0) { p->src.OwnerFile = Yap_source_file_name(); return false; } if (p->src.OwnerFile == Yap_source_file_name()) { return false; } } return false; } bool Yap_addclause(Term t, yamop *cp, Term tmode, Term mod, Term *t4ref) /* * mode 0 assertz 1 consult 2 asserta */ { CACHE_REGS PredEntry *p; int spy_flag = FALSE; Atom at; arity_t Arity; pred_flags_t pflags; Term tf; int mode; if (tmode == TermConsult) { mode = consult; } else if (tmode == TermReconsult) { mode = consult; } else if (tmode == TermAsserta) { mode = asserta; } else if (tmode == TermAssertz) { mode = assertz; } else if (tmode == TermAssertaStatic) { mode = asserta; } else if (tmode == TermAssertzStatic) { mode = assertz; } else { Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, tmode, "compilation mode used to assert"); return false; } if (IsApplTerm(t) && FunctorOfTerm(t) == FunctorAssert) tf = ArgOfTerm(1, t); else tf = t; tf = Yap_YapStripModule(tf, &mod); if (IsAtomTerm(tf)) { at = AtomOfTerm(tf); p = RepPredProp(PredPropByAtom(at, mod)); Arity = 0; } else { Functor f = FunctorOfTerm(tf); Arity = ArityOfFunctor(f); at = NameOfFunctor(f); p = RepPredProp(PredPropByFunc(f, mod)); } PELOCK(20, p); /* we are redefining a prolog module predicate */ if (Yap_constPred(p)) { addcl_permission_error(__FILE__, __FUNCTION__, __LINE__, RepAtom(at), Arity, FALSE); UNLOCKPE(30, p); return false; } Yap_PutValue(AtomAbol, TermNil); pflags = p->PredFlags; /* we are redefining a prolog module predicate */ if (pflags & MegaClausePredFlag) { split_megaclause(p); } /* The only problem we have now is when we need to throw away Indexing blocks */ if (pflags & IndexedPredFlag && p->cs.p_code.NOfClauses > 1) { Yap_AddClauseToIndex(p, cp, mode == asserta); } if (pflags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag)) { spy_flag = true; } if (Yap_discontiguous(p, tmode PASS_REGS)) { Term disc[3], sc[4]; if (p->ArityOfPE) { disc[0] = MkAtomTerm(NameOfFunctor(p->FunctorOfPred)); } else { disc[0] = MkAtomTerm((Atom)(p->FunctorOfPred)); } disc[1] = MkIntTerm(p->ArityOfPE); disc[2] = Yap_Module_Name(p); sc[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomDiscontiguous, 3), 3, disc); sc[1] = MkIntegerTerm(Yap_source_line_no()); sc[2] = MkAtomTerm(LOCAL_SourceFileName); sc[3] = t; t = Yap_MkApplTerm(Yap_MkFunctor(AtomStyleCheck, 4), 4, sc); sc[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomStyleCheck, 1), 1, &t); sc[1] = MkAtomTerm(AtomWarning); Yap_PrintWarning(Yap_MkApplTerm(Yap_MkFunctor(AtomError, 2), 2, sc)); } else if (Yap_multiple(p, tmode PASS_REGS)) { Term disc[4], sc[4]; if (p->ArityOfPE) { disc[0] = MkAtomTerm(NameOfFunctor(p->FunctorOfPred)); } else { disc[0] = MkAtomTerm((Atom)(p->FunctorOfPred)); } disc[1] = MkIntTerm(p->ArityOfPE); disc[2] = Yap_Module_Name(p); disc[3] = MkAtomTerm(p->src.OwnerFile); sc[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomMultiple, 4), 4, disc); sc[1] = MkIntegerTerm(Yap_source_line_no()); sc[2] = MkAtomTerm(LOCAL_SourceFileName); sc[3] = t; t = Yap_MkApplTerm(Yap_MkFunctor(AtomStyleCheck, 4), 4, sc); sc[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomStyleCheck, 1), 1, &t); sc[1] = MkAtomTerm(AtomWarning); Yap_PrintWarning(Yap_MkApplTerm(Yap_MkFunctor(AtomError, 2), 2, sc)); } if (mode == consult) not_was_reconsulted(p, t, true); /* always check if we have a valid error first */ if (LOCAL_ErrorMessage && LOCAL_Error_TYPE == PERMISSION_ERROR_MODIFY_STATIC_PROCEDURE) { UNLOCKPE(31, p); return false; } if (pflags & UDIPredFlag) { Yap_new_udi_clause(p, cp, t); } if (!is_dynamic(p)) { if (pflags & LogUpdatePredFlag) { LogUpdClause *clp = ClauseCodeToLogUpdClause(cp); clp->ClFlags |= LogUpdMask; if (is_fact(t)) { clp->ClFlags |= FactMask; clp->lusl.ClLine = Yap_source_line_no(); } } else { StaticClause *clp = ClauseCodeToStaticClause(cp); clp->ClFlags |= StaticMask; if (is_fact(t) && !(p->PredFlags & TabledPredFlag)) { clp->ClFlags |= FactMask; clp->usc.ClLine = Yap_source_line_no(); } } if (compile_mode) p->PredFlags = p->PredFlags | CompiledPredFlag; else p->PredFlags = p->PredFlags | CompiledPredFlag; } if (p->cs.p_code.FirstClause == NULL) { p->PredFlags &= ~UndefPredFlag; if (!(pflags & DynamicPredFlag)) { add_first_static(p, cp, spy_flag); /* make sure we have a place to jump to */ if (p->OpcodeOfPred == UNDEF_OPCODE || p->OpcodeOfPred == FAIL_OPCODE) { /* log updates */ p->CodeOfPred = p->cs.p_code.TrueCodeOfPred; p->OpcodeOfPred = ((yamop *)(p->CodeOfPred))->opc; } #if defined(YAPOR) || defined(THREADS) if (p->PredFlags & LogUpdatePredFlag && !(p->PredFlags & ThreadLocalPredFlag) && p->ModuleOfPred != IDB_MODULE) { p->OpcodeOfPred = LOCKPRED_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } #endif } else { add_first_dynamic(p, cp, spy_flag); } } else if (mode == asserta) { if (pflags & DynamicPredFlag) asserta_dynam_clause(p, cp); else asserta_stat_clause(p, cp, spy_flag); } else if (pflags & DynamicPredFlag) assertz_dynam_clause(p, cp); else { assertz_stat_clause(p, cp, spy_flag); if (p->OpcodeOfPred != INDEX_OPCODE && p->OpcodeOfPred != Yap_opcode(_spy_pred)) { p->CodeOfPred = p->cs.p_code.TrueCodeOfPred; p->OpcodeOfPred = ((yamop *)(p->CodeOfPred))->opc; } #if defined(YAPOR) || defined(THREADS) if (p->PredFlags & LogUpdatePredFlag && !(p->PredFlags & ThreadLocalPredFlag) && p->ModuleOfPred != IDB_MODULE) { p->OpcodeOfPred = LOCKPRED_OPCODE; p->CodeOfPred = (yamop *)(&(p->OpcodeOfPred)); } #endif } UNLOCKPE(32, p); if (pflags & LogUpdatePredFlag) { LogUpdClause *cl = (LogUpdClause *)ClauseCodeToLogUpdClause(cp); tf = MkDBRefTerm((DBRef)cl); #if MULTIPLE_STACKS TRAIL_CLREF(cl); /* So that fail will erase it */ INC_CLREF_COUNT(cl); #else if (!(cl->ClFlags & InUseMask)) { cl->ClFlags |= InUseMask; TRAIL_CLREF(cl); /* So that fail will erase it */ } #endif } else { tf = Yap_MkStaticRefTerm(ClauseCodeToStaticClause(cp), p); } if (mod == PROLOG_MODULE) mod = TermProlog; if (pflags & MultiFileFlag) { /* add Info on new clause for multifile predicates to the DB */ Term t[5], tn; t[0] = MkAtomTerm(Yap_ConsultingFile(PASS_REGS1)); t[1] = MkAtomTerm(at); t[2] = MkIntegerTerm(Arity); t[3] = mod; t[4] = tf; tn = Yap_MkApplTerm(FunctorMultiFileClause, 5, t); Yap_Recordz(AtomMultiFile, tn); } if (t4ref && *t4ref != TermNil) { if (!Yap_unify(*t4ref, tf)) { return false; } } return true; } void Yap_EraseMegaClause(yamop *cl, PredEntry *ap) { /* just make it fail */ cl->opc = Yap_opcode(_op_fail); } void Yap_EraseStaticClause(StaticClause *cl, PredEntry *ap, Term mod) { /* ok, first I need to find out the parent predicate */ if (ap->PredFlags & MegaClausePredFlag) { split_megaclause(ap); } if (ap->PredFlags & IndexedPredFlag) RemoveIndexation(ap); ap->cs.p_code.NOfClauses--; if (ap->cs.p_code.FirstClause == cl->ClCode) { /* got rid of first clause */ if (ap->cs.p_code.LastClause == cl->ClCode) { /* got rid of all clauses */ ap->cs.p_code.LastClause = ap->cs.p_code.FirstClause = NULL; if (is_live(ap)) { ap->OpcodeOfPred = FAIL_OPCODE; } else { ap->OpcodeOfPred = UNDEF_OPCODE; ap->PredFlags |= UndefPredFlag; } ap->cs.p_code.TrueCodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); } else { yamop *ncl = cl->ClNext->ClCode; ap->cs.p_code.FirstClause = ncl; ap->cs.p_code.TrueCodeOfPred = ncl; ap->OpcodeOfPred = ncl->opc; } } else { StaticClause *pcl = ClauseCodeToStaticClause(ap->cs.p_code.FirstClause), *ocl = NULL; while (pcl != cl) { ocl = pcl; pcl = pcl->ClNext; } if (ocl) { ocl->ClNext = cl->ClNext; } if (cl->ClCode == ap->cs.p_code.LastClause) { ap->cs.p_code.LastClause = ocl->ClCode; } } if (ap->cs.p_code.NOfClauses == 1) { assert(ap->cs.p_code.FirstClause); ap->cs.p_code.TrueCodeOfPred = ap->cs.p_code.FirstClause; ap->OpcodeOfPred = ap->cs.p_code.TrueCodeOfPred->opc; } if (cl->ClFlags & HasBlobsMask || Yap_static_in_use(ap, TRUE)) { LOCK(DeadStaticClausesLock); cl->ClNext = DeadStaticClauses; DeadStaticClauses = cl; UNLOCK(DeadStaticClausesLock); } else { Yap_InformOfRemoval(cl); Yap_ClauseSpace -= cl->ClSize; Yap_FreeCodeSpace((char *)cl); } if (ap->cs.p_code.NOfClauses == 0) { ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred; } else if (ap->cs.p_code.NOfClauses > 1) { ap->OpcodeOfPred = INDEX_OPCODE; ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); } else if (ap->PredFlags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag)) { ap->OpcodeOfPred = Yap_opcode(_spy_pred); ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); } else { ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred; } #if defined(YAPOR) || defined(THREADS) if (ap->PredFlags & LogUpdatePredFlag && !(ap->PredFlags & ThreadLocalPredFlag) && ap->ModuleOfPred != IDB_MODULE) { ap->OpcodeOfPred = LOCKPRED_OPCODE; ap->CodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); } #endif } void Yap_add_logupd_clause(PredEntry *pe, LogUpdClause *cl, int mode) { yamop *cp = cl->ClCode; if (pe->PredFlags & IndexedPredFlag) { Yap_AddClauseToIndex(pe, cp, mode == asserta); } if (pe->cs.p_code.FirstClause == NULL) { add_first_static(pe, cp, FALSE); /* make sure we have a place to jump to */ if (pe->OpcodeOfPred == UNDEF_OPCODE || pe->OpcodeOfPred == FAIL_OPCODE) { /* log updates */ #if defined(YAPOR) || defined(THREADS) if (pe->PredFlags & LogUpdatePredFlag && !(pe->PredFlags & ThreadLocalPredFlag) && pe->ModuleOfPred != IDB_MODULE) { pe->OpcodeOfPred = LOCKPRED_OPCODE; pe->CodeOfPred = (yamop *)(&(pe->OpcodeOfPred)); } else { #endif pe->CodeOfPred = pe->cs.p_code.TrueCodeOfPred; pe->OpcodeOfPred = ((yamop *)(pe->CodeOfPred))->opc; #if defined(YAPOR) || defined(THREADS) } #endif } } else if (mode == asserta) { asserta_stat_clause(pe, cp, FALSE); } else { assertz_stat_clause(pe, cp, FALSE); } } static Int p_compile(USES_REGS1) { /* '$compile'(+C,+Flags,+C0,-Ref) */ Term t = Deref(ARG1); Term t1 = Deref(ARG2); Term mod = Deref(ARG4); yamop *code_adr; if (IsVarTerm(t1) || !IsAtomicTerm(t1)) return false; if (IsVarTerm(mod) || !IsAtomTerm(mod)) return false; /* separate assert in current file from reconsult if (mode == assertz && LOCAL_consult_level && mod == CurrentModule) mode = consult; */ code_adr = Yap_cclause(t, 5, mod, Deref(ARG3)); /* vsc: give the number of arguments to cclause() in case there is a overflow */ t = Deref(ARG1); /* just in case there was an heap overflow */ if (!LOCAL_ErrorMessage) { YAPEnterCriticalSection(); Yap_addclause(t, code_adr, t1, mod, &ARG5); YAPLeaveCriticalSection(); } if (LOCAL_ErrorMessage) { Yap_Error(LOCAL_Error_TYPE, ARG1, LOCAL_ErrorMessage); YAPLeaveCriticalSection(); return false; } return true; } Atom Yap_ConsultingFile(USES_REGS1) { int sno; if ((sno = Yap_CheckAlias(AtomLoopStream)) >= 0) { // if(sno ==0) // return(AtomUserIn); return StreamFullName(sno); } if (LOCAL_SourceFileName != NULL) { return LOCAL_SourceFileName; } if (LOCAL_consult_level == 0) { return (AtomUser); } else { return (Yap_ULookupAtom(LOCAL_ConsultBase[2].f_name)); } } /* consult file *file*, *mode* may be one of either consult or reconsult */ void Yap_init_consult(int mode, const char *filenam) { CACHE_REGS if (!LOCAL_ConsultSp) { InitConsultStack(); } if (LOCAL_ConsultSp >= LOCAL_ConsultLow + 6) { expand_consult(); } LOCAL_ConsultSp--; LOCAL_ConsultSp->f_name = (const unsigned char *)filenam; LOCAL_ConsultSp--; LOCAL_ConsultSp->mode = mode; LOCAL_ConsultSp--; LOCAL_ConsultSp->c = (LOCAL_ConsultBase - LOCAL_ConsultSp); LOCAL_ConsultBase = LOCAL_ConsultSp; #if !defined(YAPOR) && !defined(YAPOR_SBA) /* if (LOCAL_consult_level == 0) do_toggle_static_predicates_in_use(TRUE); */ #endif LOCAL_consult_level++; LOCAL_LastAssertedPred = NULL; } static Int p_startconsult(USES_REGS1) { /* '$start_consult'(+Mode) */ Term t; char *smode = RepAtom(AtomOfTerm(Deref(ARG1)))->StrOfAE; int mode; mode = strcmp("consult", (char *)smode); Yap_init_consult(mode, RepAtom(AtomOfTerm(Deref(ARG2)))->StrOfAE); t = MkIntTerm(LOCAL_consult_level); return (Yap_unify_constant(ARG3, t)); } static Int p_showconslultlev(USES_REGS1) { Term t; t = MkIntTerm(LOCAL_consult_level); return (Yap_unify_constant(ARG1, t)); } static void end_consult(USES_REGS1) { LOCAL_ConsultSp = LOCAL_ConsultBase; LOCAL_ConsultBase = LOCAL_ConsultSp + LOCAL_ConsultSp->c; LOCAL_ConsultSp += 3; LOCAL_consult_level--; LOCAL_LastAssertedPred = NULL; #if !defined(YAPOR) && !defined(YAPOR_SBA) /* if (LOCAL_consult_level == 0) do_toggle_static_predicates_in_use(FALSE);*/ #endif } void Yap_end_consult(void) { CACHE_REGS end_consult(PASS_REGS1); } static Int p_endconsult(USES_REGS1) { /* '$end_consult' */ end_consult(PASS_REGS1); return (TRUE); } static void purge_clauses(PredEntry *pred) { if (pred->PredFlags & UDIPredFlag) { Yap_udi_abolish(pred); } if (pred->cs.p_code.NOfClauses) { if (pred->PredFlags & IndexedPredFlag) RemoveIndexation(pred); Yap_PutValue(AtomAbol, MkAtomTerm(AtomTrue)); retract_all(pred, Yap_static_in_use(pred, TRUE)); } } void Yap_Abolish(PredEntry *pred) { purge_clauses(pred); pred->src.OwnerFile = AtomNil; } static Int p_purge_clauses(USES_REGS1) { /* '$purge_clauses'(+Func) */ PredEntry *pred; Term t = Deref(ARG1); Term mod = Deref(ARG2); MegaClause *before = DeadMegaClauses; Yap_PutValue(AtomAbol, MkAtomTerm(AtomNil)); if (IsVarTerm(t)) return FALSE; if (IsVarTerm(mod) || !IsAtomTerm(mod)) { return FALSE; } if (IsAtomTerm(t)) { Atom at = AtomOfTerm(t); pred = RepPredProp(PredPropByAtom(at, mod)); } else if (IsApplTerm(t)) { Functor fun = FunctorOfTerm(t); pred = RepPredProp(PredPropByFunc(fun, mod)); } else return (FALSE); PELOCK(21, pred); if (pred->PredFlags & StandardPredFlag) { UNLOCKPE(33, pred); Yap_Error(PERMISSION_ERROR_MODIFY_STATIC_PROCEDURE, t, "assert/1"); return (FALSE); } purge_clauses(pred); UNLOCKPE(34, pred); /* try to use the garbage collector to recover the mega clause, in case the objs pointing to it are dead themselves */ if (DeadMegaClauses != before) { if (!Yap_gc(2, ENV, gc_P(P, CP))) { Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage); return FALSE; } } return TRUE; } static Int p_sys_export(USES_REGS1) { /* '$set_spy'(+Fun,+M) */ PredEntry *pred; Term t, mod; t = Deref(ARG1); mod = Deref(ARG2); if (IsVarTerm(mod) || !IsAtomTerm(mod)) return (FALSE); if (IsVarTerm(t)) return (FALSE); if (IsAtomTerm(t)) { Atom at = AtomOfTerm(t); pred = RepPredProp(Yap_PredPropByAtomNonThreadLocal(at, mod)); } else if (IsApplTerm(t)) { Functor fun = FunctorOfTerm(t); pred = RepPredProp(Yap_PredPropByFunctorNonThreadLocal(fun, mod)); } else { return (FALSE); } PELOCK(100, pred); pred->PredFlags |= SysExportPredFlag; UNLOCKPE(100, pred); return TRUE; } /****************************************************************** MANAGING SPY-POINTS ******************************************************************/ static Int p_is_no_trace(USES_REGS1) { /* '$undefined'(P,Mod) */ PredEntry *pe; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "undefined/1"); if (EndOfPAEntr(pe)) return true; PELOCK(36, pe); if (pe->PredFlags & (NoTracePredFlag | HiddenPredFlag)) { UNLOCKPE(57, pe); return true; } UNLOCKPE(59, pe); return false; } static Int p_set_no_trace(USES_REGS1) { /* '$set_no_trace'(+Fun,+M) */ PredEntry *pe; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "undefined/1"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(36, pe); pe->PredFlags |= NoTracePredFlag; UNLOCKPE(57, pe); return TRUE; } int Yap_SetNoTrace(char *name, arity_t arity, Term tmod) { PredEntry *pe; if (arity == 0) { pe = Yap_get_pred(MkAtomTerm(Yap_LookupAtom(name)), tmod, "no_trace"); } else { pe = RepPredProp( PredPropByFunc(Yap_MkFunctor(Yap_LookupAtom(name), arity), tmod)); } if (EndOfPAEntr(pe)) return FALSE; PELOCK(36, pe); pe->PredFlags |= NoTracePredFlag; UNLOCKPE(57, pe); return TRUE; } static Int p_setspy(USES_REGS1) { /* '$set_spy'(+Fun,+M) */ Atom at; PredEntry *pred; pred_flags_t fg; Term t, mod; at = AtomSpy; pred = RepPredProp(PredPropByFunc(Yap_MkFunctor(at, 1), 0)); SpyCode = pred; t = Deref(ARG1); mod = Deref(ARG2); if (IsVarTerm(mod) || !IsAtomTerm(mod)) return (FALSE); if (IsVarTerm(t)) return (FALSE); if (IsAtomTerm(t)) { Atom at = AtomOfTerm(t); pred = RepPredProp(Yap_PredPropByAtomNonThreadLocal(at, mod)); } else if (IsApplTerm(t)) { Functor fun = FunctorOfTerm(t); pred = RepPredProp(Yap_PredPropByFunctorNonThreadLocal(fun, mod)); } else { return (FALSE); } PELOCK(22, pred); restart_spy: if (pred->PredFlags & (CPredFlag | SafePredFlag)) { UNLOCKPE(35, pred); return FALSE; } if (pred->OpcodeOfPred == UNDEF_OPCODE || pred->OpcodeOfPred == FAIL_OPCODE) { UNLOCKPE(36, pred); return FALSE; } if (pred->OpcodeOfPred == INDEX_OPCODE) { int i = 0; for (i = 0; i < pred->ArityOfPE; i++) { XREGS[i + 1] = MkVarTerm(); } IPred(pred, 0, CP); goto restart_spy; } fg = pred->PredFlags; if (fg & DynamicPredFlag) { pred->OpcodeOfPred = ((yamop *)(pred->CodeOfPred))->opc = Yap_opcode(_spy_or_trymark); } else { pred->OpcodeOfPred = Yap_opcode(_spy_pred); pred->CodeOfPred = (yamop *)(&(pred->OpcodeOfPred)); } pred->PredFlags |= SpiedPredFlag; UNLOCKPE(37, pred); return TRUE; } static Int p_rmspy(USES_REGS1) { /* '$rm_spy'(+T,+Mod) */ Atom at; PredEntry *pred; Term t; Term mod; t = Deref(ARG1); mod = Deref(ARG2); if (IsVarTerm(mod) || !IsAtomTerm(mod)) return (FALSE); if (IsVarTerm(t)) return (FALSE); if (IsAtomTerm(t)) { at = AtomOfTerm(t); pred = RepPredProp(Yap_PredPropByAtomNonThreadLocal(at, mod)); } else if (IsApplTerm(t)) { Functor fun = FunctorOfTerm(t); pred = RepPredProp(Yap_PredPropByFunctorNonThreadLocal(fun, mod)); } else return FALSE; PELOCK(23, pred); if (!(pred->PredFlags & SpiedPredFlag)) { UNLOCKPE(38, pred); return FALSE; } #if THREADS if (pred->PredFlags & ThreadLocalPredFlag) { pred->OpcodeOfPred = Yap_opcode(_thread_local); pred->PredFlags ^= SpiedPredFlag; UNLOCKPE(39, pred); return TRUE; } #endif if (!(pred->PredFlags & (CountPredFlag | ProfiledPredFlag))) { if (!(pred->PredFlags & DynamicPredFlag)) { #if defined(YAPOR) || defined(THREADS) if (pred->PredFlags & LogUpdatePredFlag && !(pred->PredFlags & ThreadLocalPredFlag) && pred->ModuleOfPred != IDB_MODULE) { pred->OpcodeOfPred = LOCKPRED_OPCODE; pred->CodeOfPred = (yamop *)(&(pred->OpcodeOfPred)); } else { #endif pred->CodeOfPred = pred->cs.p_code.TrueCodeOfPred; pred->OpcodeOfPred = pred->CodeOfPred->opc; #if defined(YAPOR) || defined(THREADS) } #endif } else if (pred->OpcodeOfPred == Yap_opcode(_spy_or_trymark)) { pred->OpcodeOfPred = Yap_opcode(_try_and_mark); } else { UNLOCKPE(39, pred); return FALSE; } } pred->PredFlags ^= SpiedPredFlag; UNLOCKPE(40, pred); return (TRUE); } /****************************************************************** INFO ABOUT PREDICATES ******************************************************************/ static Int number_of_clauses(USES_REGS1) { /* '$number_of_clauses'(Predicate,M,N) */ Term t = Deref(ARG1); Term mod = Deref(ARG2); int ncl = 0; Prop pe; if (IsVarTerm(mod) || !IsAtomTerm(mod)) { return (FALSE); } if (IsAtomTerm(t)) { Atom a = AtomOfTerm(t); pe = Yap_GetPredPropByAtom(a, mod); } else if (IsApplTerm(t)) { register Functor f = FunctorOfTerm(t); pe = Yap_GetPredPropByFunc(f, mod); } else { return (FALSE); } if (EndOfPAEntr(pe)) return FALSE; PELOCK(24, RepPredProp(pe)); ncl = RepPredProp(pe)->cs.p_code.NOfClauses; UNLOCKPE(41, RepPredProp(pe)); return (Yap_unify_constant(ARG3, MkIntegerTerm(ncl))); } /* @pred '$new_multifile'(+G,+Mod) * sets the multi-file flag * */ static Int new_multifile(USES_REGS1) { PredEntry *pe; Atom at; arity_t arity; pe = new_pred(Deref(ARG1), Deref(ARG2), "multifile"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(30, pe); arity = pe->ArityOfPE; if (arity == 0) at = (Atom)pe->FunctorOfPred; else at = NameOfFunctor(pe->FunctorOfPred); if (pe->PredFlags & MultiFileFlag) { UNLOCKPE(26, pe); return true; } if (pe->PredFlags & (TabledPredFlag | ForeignPredFlags)) { UNLOCKPE(26, pe); addcl_permission_error(__FILE__, __FUNCTION__, __LINE__,RepAtom(at), arity, FALSE); return false; } if (pe->cs.p_code.NOfClauses) { UNLOCKPE(26, pe); addcl_permission_error(__FILE__, __FUNCTION__, __LINE__,RepAtom(at), arity, FALSE); return false; } pe->PredFlags &= ~UndefPredFlag; pe->PredFlags |= MultiFileFlag; /* mutifile-predicates are weird, they do not seat really on the default * module */ if (!(pe->PredFlags & (DynamicPredFlag | LogUpdatePredFlag))) { /* static */ pe->PredFlags |= (SourcePredFlag | CompiledPredFlag); } pe->src.OwnerFile = Yap_ConsultingFile(PASS_REGS1); if (pe->cs.p_code.NOfClauses == 0) { pe->CodeOfPred = pe->cs.p_code.TrueCodeOfPred = FAILCODE; pe->OpcodeOfPred = FAIL_OPCODE; } UNLOCKPE(43, pe); return true; } static Int p_is_multifile(USES_REGS1) { /* '$is_multifile'(+S,+Mod) */ PredEntry *pe; bool out; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_multifile"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(27, pe); out = (pe->PredFlags & MultiFileFlag); UNLOCKPE(44, pe); return (out); } static Int new_system_predicate( USES_REGS1) { /* '$new_system_predicate'(+N,+Ar,+Mod) */ Atom at; arity_t arity; PredEntry *pe; Term t = Deref(ARG1); Term mod = Deref(ARG3); if (IsVarTerm(t)) return (FALSE); if (IsAtomTerm(t)) at = AtomOfTerm(t); else return (FALSE); t = Deref(ARG2); if (IsVarTerm(t)) return (FALSE); if (IsIntTerm(t)) arity = IntOfTerm(t); else return FALSE; if (arity == 0) pe = RepPredProp(PredPropByAtom(at, mod)); else pe = RepPredProp(PredPropByFunc(Yap_MkFunctor(at, arity), mod)); PELOCK(26, pe); if (pe->PredFlags & (LogUpdatePredFlag | DynamicPredFlag | MultiFileFlag)) { UNLOCKPE(43, pe); return false; } pe->PredFlags |= (StandardPredFlag); UNLOCKPE(43, pe); return (true); } static Int p_is_system_predicate(USES_REGS1) { /* '$is_multifile'(+S,+Mod) */ PredEntry *pe; Term t1 = Deref(ARG1); // pe = Yap_get_pred(t1, Deref(ARG2), "system_predicate"); // if (!pe) pe = Yap_get_pred(t1, Deref(ARG2), "system_predicate"); // if (!pe) pe = Yap_get_pred(t1, USER_MODULE, "system_predicate"); if (EndOfPAEntr(pe)) return FALSE; return (pe->ModuleOfPred == 0); // return true; // PELOCK(27, pe); // out = (pe->PredFlags & SystemPredFlags); // UNLOCKPE(44, pe); // return (out); } static Int p_is_opaque_predicate(USES_REGS1) { /* '$is_multifile'(+S,+Mod) */ PredEntry *pe; Term t1 = Deref(ARG1); bool out; // pe = Yap_get_pred(t1, Deref(ARG2), "system_predicate"); // if (!pe) pe = Yap_get_pred(t1, Deref(ARG2), "system_predicate"); // if (!pe) pe = Yap_get_pred(t1, USER_MODULE, "system_predicate"); if (EndOfPAEntr(pe)) return FALSE; return (pe->ModuleOfPred == 0 || pe->PredFlags & (SystemPredFlags | ForeignPredFlags)); UNLOCKPE(44, pe); return (out); } static Int p_is_thread_local(USES_REGS1) { /* '$is_dynamic'(+P) */ PredEntry *pe; bool out; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_log_updatable"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(27, pe); out = (pe->PredFlags & ThreadLocalPredFlag); UNLOCKPE(45, pe); return (out); } static Int p_is_log_updatable(USES_REGS1) { /* '$is_dynamic'(+P) */ PredEntry *pe; bool out; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_log_updatable"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(27, pe); out = (pe->PredFlags & LogUpdatePredFlag); UNLOCKPE(45, pe); return (out); } static Int p_is_source(USES_REGS1) { /* '$is_dynamic'(+P) */ PredEntry *pe; bool out; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_source"); if (EndOfPAEntr(pe)) return false; PELOCK(28, pe); if (pe->PredFlags & SystemPredFlags) { UNLOCKPE(46, pe); return false; } out = (pe->PredFlags & (SourcePredFlag | LogUpdatePredFlag | MegaClausePredFlag | DynamicPredFlag)); UNLOCKPE(46, pe); return out; } static Int p_is_exo(USES_REGS1) { /* '$is_dynamic'(+P) */ PredEntry *pe; bool out; MegaClause *mcl; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_exo"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(28, pe); out = (pe->PredFlags & MegaClausePredFlag); if (out) { mcl = ClauseCodeToMegaClause(pe->cs.p_code.FirstClause); out = mcl->ClFlags & ExoMask; } UNLOCKPE(46, pe); return (out); } static Int owner_file(USES_REGS1) { /* '$owner_file'(+P,M,F) */ PredEntry *pe; Atom owner; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_source"); if (EndOfPAEntr(pe)) return false; PELOCK(29, pe); if (pe->ModuleOfPred == IDB_MODULE) { UNLOCKPE(47, pe); return false; } if (pe->PredFlags & MultiFileFlag) { UNLOCKPE(48, pe); return false; } if (is_system(pe) || is_foreign(pe)) { UNLOCKPE(48, pe); return false; } owner = pe->src.OwnerFile; UNLOCKPE(49, pe); if (owner == AtomNil || owner == NULL) return false; return Yap_unify(ARG3, MkAtomTerm(owner)); } static Int p_set_owner_file(USES_REGS1) { /* '$owner_file'(+P,M,F) */ PredEntry *pe; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_source"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(29, pe); if (pe->ModuleOfPred == IDB_MODULE) { UNLOCKPE(47, pe); return FALSE; } if (pe->PredFlags & MultiFileFlag) { UNLOCKPE(48, pe); return FALSE; } pe->src.OwnerFile = AtomOfTerm(Deref(ARG3)); UNLOCKPE(49, pe); return TRUE; } static Int mk_dynamic(USES_REGS1) { /* '$make_dynamic'(+P) */ PredEntry *pe; Atom at; arity_t arity; pe = new_pred(Deref(ARG1), Deref(ARG2), "dynamic"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(30, pe); arity = pe->ArityOfPE; if (arity == 0) at = (Atom)pe->FunctorOfPred; else at = NameOfFunctor(pe->FunctorOfPred); if (pe->PredFlags & (UserCPredFlag | CArgsPredFlag | NumberDBPredFlag | AtomDBPredFlag | TestPredFlag | AsmPredFlag | CPredFlag | BinaryPredFlag)) { UNLOCKPE(30, pe); addcl_permission_error(__FILE__, __FUNCTION__, __LINE__,RepAtom(at), arity, FALSE); return false; } if (pe->PredFlags & LogUpdatePredFlag) { UNLOCKPE(26, pe); return true; } if (pe->PredFlags & DynamicPredFlag) { UNLOCKPE(26, pe); return true; } if (pe->cs.p_code.NOfClauses != 0) { UNLOCKPE(26, pe); addcl_permission_error(__FILE__, __FUNCTION__, __LINE__, RepAtom(at), arity, FALSE); return false; } if (pe->OpcodeOfPred == UNDEF_OPCODE) { pe->OpcodeOfPred = FAIL_OPCODE; pe->PredFlags &= ~UndefPredFlag; } pe->src.OwnerFile = Yap_ConsultingFile(PASS_REGS1); pe->PredFlags |= LogUpdatePredFlag; UNLOCKPE(50, pe); return true; } static Int p_is_dynamic(USES_REGS1) { /* '$is_dynamic'(+P) */ PredEntry *pe; bool out; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_dynamic"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(31, pe); out = (pe->PredFlags & (DynamicPredFlag | LogUpdatePredFlag)); UNLOCKPE(51, pe); return (out); } /* @pred '$new_multifile'(+G,+Mod) * sets the multi-file flag * */ static Int new_meta_pred(USES_REGS1) { PredEntry *pe; Atom at; arity_t arity; pe = new_pred(Deref(ARG1), Deref(ARG2), "meta_predicate"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(30, pe); arity = pe->ArityOfPE; if (arity == 0) at = (Atom)pe->FunctorOfPred; else at = NameOfFunctor(pe->FunctorOfPred); if (pe->PredFlags & MetaPredFlag) { UNLOCKPE(26, pe); return true; } if (pe->cs.p_code.NOfClauses) { UNLOCKPE(26, pe); addcl_permission_error(__FILE__, __FUNCTION__, __LINE__, RepAtom(at), arity, FALSE); return false; } pe->PredFlags |= MetaPredFlag; if (!(pe->PredFlags & (DynamicPredFlag | LogUpdatePredFlag))) { /* static */ pe->PredFlags |= (SourcePredFlag | CompiledPredFlag); } UNLOCKPE(43, pe); return true; } static Int p_is_metapredicate(USES_REGS1) { /* '$is_metapredicate'(+P) */ PredEntry *pe; bool out; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$is_meta"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(32, pe); out = (pe->PredFlags & MetaPredFlag); UNLOCKPE(52, pe); return out; } static Int p_pred_exists(USES_REGS1) { /* '$pred_exists'(+P,+M) */ PredEntry *pe; bool out; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "$exists"); if (EndOfPAEntr(pe)) return false; PELOCK(34, pe); if (pe->PredFlags & HiddenPredFlag) { UNLOCKPE(54, pe); return false; } out = (is_live(pe) || pe->OpcodeOfPred != UNDEF_OPCODE); UNLOCKPE(55, pe); return out; } static Int p_set_pred_module(USES_REGS1) { /* '$set_pred_module'(+P,+Mod) */ PredEntry *pe; pe = Yap_get_pred(Deref(ARG1), CurrentModule, "set_pred_module/1"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(35, pe); pe->ModuleOfPred = Deref(ARG2); UNLOCKPE(56, pe); return (TRUE); } static Int p_set_pred_owner(USES_REGS1) { /* '$set_pred_module'(+P,+File) */ PredEntry *pe; Term a2 = Deref(ARG2); pe = Yap_get_pred(Deref(ARG1), CurrentModule, "set_pred_module/1"); if (EndOfPAEntr(pe)) return FALSE; PELOCK(35, pe); if (pe->PredFlags & (UserCPredFlag | CArgsPredFlag | NumberDBPredFlag | AtomDBPredFlag | TestPredFlag | AsmPredFlag | CPredFlag | BinaryPredFlag)) { UNLOCKPE(56, pe); return FALSE; } if (IsVarTerm(a2)) { Yap_Error(INSTANTIATION_ERROR, a2, "load_files/2"); UNLOCKPE(56, pe); return FALSE; } if (!IsAtomTerm(a2)) { Yap_Error(TYPE_ERROR_ATOM, a2, "load_files/2"); UNLOCKPE(56, pe); return FALSE; } pe->src.OwnerFile = AtomOfTerm(a2); UNLOCKPE(56, pe); return (TRUE); } /** * Set handler for undefined predicates. */ static Int undefp_handler(USES_REGS1) { /* '$undefp_handler'(P,Mod) */ PredEntry *pe; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "undefined/1"); if (EndOfPAEntr(pe)) return false; PELOCK(59, pe); if (pe->OpcodeOfPred == UNDEF_OPCODE) { UNLOCKPE(59, pe); return false; } UndefCode = pe; UNLOCKPE(59, pe); return true; } static Int p_undefined(USES_REGS1) { /* '$undefined'(P,Mod) */ PredEntry *pe; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "undefined/1"); if (EndOfPAEntr(pe)) return TRUE; PELOCK(36, pe); if (!is_live(pe) && pe->OpcodeOfPred == UNDEF_OPCODE) { UNLOCKPE(58, pe); return TRUE; } UNLOCKPE(59, pe); return FALSE; } /* * this predicate should only be called when all clauses for the dynamic * predicate were remove, otherwise chaos will follow!! */ static Int p_kill_dynamic(USES_REGS1) { /* '$kill_dynamic'(P,M) */ PredEntry *pe; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "kill_dynamic/1"); if (EndOfPAEntr(pe)) return TRUE; PELOCK(37, pe); if (!(pe->PredFlags & (DynamicPredFlag | LogUpdatePredFlag))) { UNLOCKPE(60, pe); return FALSE; } if (pe->cs.p_code.LastClause != pe->cs.p_code.FirstClause) { UNLOCKPE(61, pe); return (FALSE); } pe->cs.p_code.LastClause = pe->cs.p_code.FirstClause = NULL; pe->OpcodeOfPred = UNDEF_OPCODE; pe->cs.p_code.TrueCodeOfPred = pe->CodeOfPred = (yamop *)(&(pe->OpcodeOfPred)); pe->PredFlags = UndefPredFlag; UNLOCKPE(62, pe); return (TRUE); } static Int p_optimizer_on(USES_REGS1) { /* '$optimizer_on' */ optimizer_on = TRUE; return (TRUE); } static Int p_optimizer_off(USES_REGS1) { /* '$optimizer_off' */ optimizer_on = FALSE; return (TRUE); } static Int p_is_profiled(USES_REGS1) { Term t = Deref(ARG1); char *s; if (IsVarTerm(t)) { Term ta; if (trueGlobalPrologFlag(PROFILING_FLAG)) ta = MkAtomTerm(AtomOn); else ta = MkAtomTerm(AtomOff); YapBind((CELL *)t, ta); return (TRUE); } else if (!IsAtomTerm(t)) return (FALSE); s = (char *)RepAtom(AtomOfTerm(t))->StrOfAE; if (strcmp(s, "on") == 0) { Yap_InitComma(); return (TRUE); } else if (strcmp(s, "off") == 0) { PROFILING = FALSE; Yap_InitComma(); return (TRUE); } return (FALSE); } static Int p_profile_info(USES_REGS1) { Term mod = Deref(ARG1); Term tfun = Deref(ARG2); Term out; PredEntry *pe; Term p[3]; if (IsVarTerm(mod) || !IsAtomTerm(mod)) return (FALSE); if (IsVarTerm(tfun)) { return (FALSE); } else if (IsApplTerm(tfun)) { Functor f = FunctorOfTerm(tfun); if (IsExtensionFunctor(f)) { return (FALSE); } pe = RepPredProp(Yap_GetPredPropByFunc(f, mod)); } else if (IsAtomTerm(tfun)) { pe = RepPredProp(Yap_GetPredPropByAtom(AtomOfTerm(tfun), mod)); } else { return (FALSE); } if (EndOfPAEntr(pe)) return (FALSE); LOCK(pe->StatisticsForPred->lock); if (!(pe->StatisticsForPred->NOfEntries)) { UNLOCK(pe->StatisticsForPred->lock); return (FALSE); } p[0] = Yap_MkULLIntTerm(pe->StatisticsForPred->NOfEntries); p[1] = Yap_MkULLIntTerm(pe->StatisticsForPred->NOfHeadSuccesses); p[2] = Yap_MkULLIntTerm(pe->StatisticsForPred->NOfRetries); UNLOCK(pe->StatisticsForPred->lock); out = Yap_MkApplTerm(Yap_MkFunctor(AtomProfile, 3), 3, p); return (Yap_unify(ARG3, out)); } static Int p_profile_reset(USES_REGS1) { Term mod = Deref(ARG1); Term tfun = Deref(ARG2); PredEntry *pe; if (IsVarTerm(mod) || !IsAtomTerm(mod)) return (FALSE); if (IsVarTerm(tfun)) { return (FALSE); } else if (IsApplTerm(tfun)) { Functor f = FunctorOfTerm(tfun); if (IsExtensionFunctor(f)) { return (FALSE); } pe = RepPredProp(Yap_GetPredPropByFunc(f, mod)); } else if (IsAtomTerm(tfun)) { pe = RepPredProp(Yap_GetPredPropByAtom(AtomOfTerm(tfun), mod)); } else { return (FALSE); } if (EndOfPAEntr(pe)) return (FALSE); LOCK(pe->StatisticsForPred->lock); pe->StatisticsForPred->NOfEntries = 0; pe->StatisticsForPred->NOfHeadSuccesses = 0; pe->StatisticsForPred->NOfRetries = 0; UNLOCK(pe->StatisticsForPred->lock); return (TRUE); } static Int p_is_call_counted(USES_REGS1) { Term t = Deref(ARG1); char *s; if (IsVarTerm(t)) { Term ta; if (CALL_COUNTING) ta = MkAtomTerm(AtomOn); else ta = MkAtomTerm(AtomOff); YapBind((CELL *)t, ta); return (TRUE); } else if (!IsAtomTerm(t)) return (FALSE); s = (char *)RepAtom(AtomOfTerm(t))->StrOfAE; if (strcmp(s, "on") == 0) { CALL_COUNTING = TRUE; Yap_InitComma(); return (TRUE); } else if (strcmp(s, "off") == 0) { CALL_COUNTING = FALSE; Yap_InitComma(); return (TRUE); } return (FALSE); } static Int p_call_count_info(USES_REGS1) { return (Yap_unify(MkIntegerTerm(LOCAL_ReductionsCounter), ARG1) && Yap_unify(MkIntegerTerm(LOCAL_PredEntriesCounter), ARG2) && Yap_unify(MkIntegerTerm(LOCAL_PredEntriesCounter), ARG3)); } static Int p_call_count_reset(USES_REGS1) { LOCAL_ReductionsCounter = 0; LOCAL_ReductionsCounterOn = FALSE; LOCAL_PredEntriesCounter = 0; LOCAL_PredEntriesCounterOn = FALSE; LOCAL_RetriesCounter = 0; LOCAL_RetriesCounterOn = FALSE; return (TRUE); } static Int p_call_count_set(USES_REGS1) { int do_calls = IntOfTerm(ARG2); int do_retries = IntOfTerm(ARG4); int do_entries = IntOfTerm(ARG6); if (do_calls) LOCAL_ReductionsCounter = IntegerOfTerm(Deref(ARG1)); LOCAL_ReductionsCounterOn = do_calls; if (do_retries) LOCAL_RetriesCounter = IntegerOfTerm(Deref(ARG3)); LOCAL_RetriesCounterOn = do_retries; if (do_entries) LOCAL_PredEntriesCounter = IntegerOfTerm(Deref(ARG5)); LOCAL_PredEntriesCounterOn = do_entries; return (TRUE); } static Int p_clean_up_dead_clauses(USES_REGS1) { while (DeadStaticClauses != NULL) { char *pt = (char *)DeadStaticClauses; Yap_ClauseSpace -= DeadStaticClauses->ClSize; DeadStaticClauses = DeadStaticClauses->ClNext; Yap_InformOfRemoval(pt); Yap_FreeCodeSpace(pt); } while (DeadStaticIndices != NULL) { char *pt = (char *)DeadStaticIndices; if (DeadStaticIndices->ClFlags & SwitchTableMask) Yap_IndexSpace_SW -= DeadStaticIndices->ClSize; else Yap_IndexSpace_Tree -= DeadStaticIndices->ClSize; DeadStaticIndices = DeadStaticIndices->SiblingIndex; Yap_InformOfRemoval(pt); Yap_FreeCodeSpace(pt); } while (DeadMegaClauses != NULL) { char *pt = (char *)DeadMegaClauses; Yap_ClauseSpace -= DeadMegaClauses->ClSize; DeadMegaClauses = DeadMegaClauses->ClNext; Yap_InformOfRemoval(pt); Yap_FreeCodeSpace(pt); } return TRUE; } void Yap_HidePred(PredEntry *pe) { pe->PredFlags |= (HiddenPredFlag | NoSpyPredFlag | NoTracePredFlag); } static Int /* $system_predicate(P) */ p_stash_predicate(USES_REGS1) { PredEntry *pe; Term t1 = Deref(ARG1); Term mod = Deref(ARG2); restart_system_pred: if (IsVarTerm(t1)) return (FALSE); if (IsAtomTerm(t1)) { Atom a = AtomOfTerm(t1); pe = RepPredProp(Yap_GetPredPropByAtom(a, mod)); } else if (IsApplTerm(t1)) { Functor funt = FunctorOfTerm(t1); if (IsExtensionFunctor(funt)) { return (FALSE); } if (funt == FunctorModule) { Term nmod = ArgOfTerm(1, t1); if (IsVarTerm(nmod)) { Yap_Error(INSTANTIATION_ERROR, ARG1, "hide_predicate/1"); return (FALSE); } if (!IsAtomTerm(nmod)) { Yap_Error(TYPE_ERROR_ATOM, ARG1, "hide_predicate/1"); return (FALSE); } t1 = ArgOfTerm(2, t1); goto restart_system_pred; } pe = RepPredProp(Yap_GetPredPropByFunc(funt, mod)); } else if (IsPairTerm(t1)) { return TRUE; } else return FALSE; if (EndOfPAEntr(pe)) return FALSE; Yap_HidePred(pe); return TRUE; } static Int /* $system_predicate(P) */ hide_predicate(USES_REGS1) { PredEntry *pe; Term t1 = Deref(ARG1); Term mod = Deref(ARG2); restart_system_pred: if (IsVarTerm(t1)) return (FALSE); if (IsAtomTerm(t1)) { Atom a = AtomOfTerm(t1); pe = RepPredProp(Yap_GetPredPropByAtom(a, mod)); } else if (IsApplTerm(t1)) { Functor funt = FunctorOfTerm(t1); if (IsExtensionFunctor(funt)) { return (FALSE); } if (funt == FunctorModule) { Term nmod = ArgOfTerm(1, t1); if (IsVarTerm(nmod)) { Yap_Error(INSTANTIATION_ERROR, ARG1, "hide_predicate/1"); return (FALSE); } if (!IsAtomTerm(nmod)) { Yap_Error(TYPE_ERROR_ATOM, ARG1, "hide_predicate/1"); return (FALSE); } t1 = ArgOfTerm(2, t1); goto restart_system_pred; } pe = RepPredProp(Yap_GetPredPropByFunc(funt, mod)); } else if (IsPairTerm(t1)) { return true; } else return false; if (EndOfPAEntr(pe)) return false; pe->PredFlags |= (HiddenPredFlag | NoSpyPredFlag | NoTracePredFlag); return true; } static Int /* $hidden_predicate(P) */ p_hidden_predicate(USES_REGS1) { PredEntry *pe; Term t1 = Deref(ARG1); Term mod = Deref(ARG2); restart_system_pred: if (IsVarTerm(t1)) return (FALSE); if (IsAtomTerm(t1)) { pe = RepPredProp(Yap_GetPredPropByAtom(AtomOfTerm(t1), mod)); } else if (IsApplTerm(t1)) { Functor funt = FunctorOfTerm(t1); if (IsExtensionFunctor(funt)) { return (FALSE); } if (funt == FunctorModule) { Term nmod = ArgOfTerm(1, t1); if (IsVarTerm(nmod)) { Yap_Error(INSTANTIATION_ERROR, ARG1, "hide_predicate/1"); return (FALSE); } if (!IsAtomTerm(nmod)) { Yap_Error(TYPE_ERROR_ATOM, ARG1, "hide_predicate/1"); return (FALSE); } t1 = ArgOfTerm(2, t1); goto restart_system_pred; } pe = RepPredProp(Yap_GetPredPropByFunc(funt, mod)); } else if (IsPairTerm(t1)) { return (TRUE); } else return (FALSE); if (EndOfPAEntr(pe)) return (FALSE); return (pe->PredFlags & HiddenPredFlag); } static Int fetch_next_lu_clause(PredEntry *pe, yamop *i_code, Term th, Term tb, Term tr, yamop *cp_ptr, int first_time) { CACHE_REGS LogUpdClause *cl; Term rtn; Term Terms[3]; Terms[0] = th; Terms[1] = tb; Terms[2] = tr; cl = Yap_FollowIndexingCode( pe, i_code, Terms, NEXTOP(PredLogUpdClause->CodeOfPred, Otapl), cp_ptr); th = Terms[0]; tb = Terms[1]; tr = Terms[2]; if (cl == NULL) { UNLOCK(pe->PELock); return FALSE; } rtn = MkDBRefTerm((DBRef)cl); #if MULTIPLE_STACKS TRAIL_CLREF(cl); /* So that fail will erase it */ INC_CLREF_COUNT(cl); #else if (!(cl->ClFlags & InUseMask)) { cl->ClFlags |= InUseMask; TRAIL_CLREF(cl); /* So that fail will erase it */ } #endif if (cl->ClFlags & FactMask) { if (!Yap_unify_constant(tb, MkAtomTerm(AtomTrue)) || !Yap_unify(tr, rtn)) { UNLOCK(pe->PELock); return FALSE; } if (pe->ArityOfPE) { Functor f = FunctorOfTerm(th); arity_t arity = ArityOfFunctor(f), i; CELL *pt = RepAppl(th) + 1; for (i = 0; i < arity; i++) { XREGS[i + 1] = pt[i]; } /* don't need no ENV */ if (first_time && P->opc != EXECUTE_CPRED_OP_CODE) { CP = P; ENV = YENV; YENV = ASP; YENV[E_CB] = (CELL)B; } P = cl->ClCode; #if defined(YAPOR) || defined(THREADS) if (pe->PredFlags & ThreadLocalPredFlag) { /* we don't actually need to execute code */ UNLOCK(pe->PELock); } else { PP = pe; } #endif } else { /* we don't actually need to execute code */ UNLOCK(pe->PELock); } return TRUE; } else { Term t; while ((t = Yap_FetchClauseTermFromDB(cl->lusl.ClSource)) == 0L) { if (first_time) { ARG5 = th; ARG6 = tb; ARG7 = tr; if (LOCAL_Error_TYPE == RESOURCE_ERROR_ATTRIBUTED_VARIABLES) { LOCAL_Error_TYPE = YAP_NO_ERROR; if (!Yap_growglobal(NULL)) { UNLOCK(pe->PELock); Yap_Error(RESOURCE_ERROR_ATTRIBUTED_VARIABLES, TermNil, LOCAL_ErrorMessage); return FALSE; } } else { LOCAL_Error_TYPE = YAP_NO_ERROR; if (!Yap_gcl(LOCAL_Error_Size, 7, ENV, gc_P(P, CP))) { UNLOCK(pe->PELock); Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage); return FALSE; } } th = ARG5; tb = ARG6; tr = ARG7; } else { ARG6 = th; ARG7 = tb; ARG8 = tr; if (!Yap_gcl(LOCAL_Error_Size, 8, ENV, gc_P(P, CP))) { UNLOCK(pe->PELock); Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage); return FALSE; } th = ARG6; tb = ARG7; tr = ARG8; } } UNLOCK(pe->PELock); return (Yap_unify(th, ArgOfTerm(1, t)) && Yap_unify(tb, ArgOfTerm(2, t)) && Yap_unify(tr, rtn)); } } static Int /* $hidden_predicate(P) */ p_log_update_clause(USES_REGS1) { PredEntry *pe; Term t1 = Deref(ARG1); Int ret; yamop *new_cp; if (P->opc == EXECUTE_CPRED_OP_CODE) { new_cp = CP; } else { new_cp = P; } pe = Yap_get_pred(t1, Deref(ARG2), "clause/3"); if (pe == NULL || EndOfPAEntr(pe)) return FALSE; PELOCK(41, pe); ret = fetch_next_lu_clause(pe, pe->CodeOfPred, t1, ARG3, ARG4, new_cp, TRUE); return ret; } static Int /* $hidden_predicate(P) */ p_continue_log_update_clause(USES_REGS1) { PredEntry *pe = (PredEntry *)IntegerOfTerm(Deref(ARG1)); yamop *ipc = (yamop *)IntegerOfTerm(ARG2); PELOCK(42, pe); return fetch_next_lu_clause(pe, ipc, Deref(ARG3), ARG4, ARG5, B->cp_cp, FALSE); } static Int fetch_next_lu_clause_erase(PredEntry *pe, yamop *i_code, Term th, Term tb, Term tr, yamop *cp_ptr, int first_time) { CACHE_REGS LogUpdClause *cl; Term rtn; Term Terms[3]; Terms[0] = th; Terms[1] = tb; Terms[2] = tr; cl = Yap_FollowIndexingCode(pe, i_code, Terms, NEXTOP(PredLogUpdClauseErase->CodeOfPred, Otapl), cp_ptr); th = Terms[0]; tb = Terms[1]; tr = Terms[2]; /* don't do this!! I might have stored a choice-point and changed ASP Yap_RecoverSlots(3); */ if (cl == NULL) { UNLOCK(pe->PELock); return FALSE; } rtn = MkDBRefTerm((DBRef)cl); #if MULTIPLE_STACKS TRAIL_CLREF(cl); /* So that fail will erase it */ INC_CLREF_COUNT(cl); #else if (!(cl->ClFlags & InUseMask)) { cl->ClFlags |= InUseMask; TRAIL_CLREF(cl); /* So that fail will erase it */ } #endif if (cl->ClFlags & FactMask) { if (!Yap_unify_constant(tb, MkAtomTerm(AtomTrue)) || !Yap_unify(tr, rtn)) { UNLOCK(pe->PELock); return FALSE; } if (pe->ArityOfPE) { Functor f = FunctorOfTerm(th); arity_t arity = ArityOfFunctor(f), i; CELL *pt = RepAppl(th) + 1; for (i = 0; i < arity; i++) { XREGS[i + 1] = pt[i]; } /* don't need no ENV */ if (first_time && P->opc != EXECUTE_CPRED_OP_CODE) { CP = P; ENV = YENV; YENV = ASP; YENV[E_CB] = (CELL)B; } P = cl->ClCode; #if defined(YAPOR) || defined(THREADS) if (pe->PredFlags & ThreadLocalPredFlag) { /* we don't actually need to execute code */ UNLOCK(pe->PELock); } else { PP = pe; } #endif } else { /* we don't actually need to execute code */ UNLOCK(pe->PELock); } Yap_ErLogUpdCl(cl); return TRUE; } else { Term t; Int res; while ((t = Yap_FetchClauseTermFromDB(cl->lusl.ClSource)) == 0L) { if (first_time) { ARG5 = th; ARG6 = tb; ARG7 = tr; if (LOCAL_Error_TYPE == RESOURCE_ERROR_ATTRIBUTED_VARIABLES) { LOCAL_Error_TYPE = YAP_NO_ERROR; if (!Yap_locked_growglobal(NULL)) { UNLOCK(pe->PELock); Yap_Error(RESOURCE_ERROR_ATTRIBUTED_VARIABLES, TermNil, LOCAL_ErrorMessage); return FALSE; } } else { LOCAL_Error_TYPE = YAP_NO_ERROR; if (!Yap_locked_gcl(LOCAL_Error_Size, 7, ENV, gc_P(P, CP))) { UNLOCK(pe->PELock); Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage); return FALSE; } } th = ARG5; tb = ARG6; tr = ARG7; } else { ARG6 = th; ARG7 = tb; ARG8 = tr; if (!Yap_gcl(LOCAL_Error_Size, 8, ENV, CP)) { UNLOCK(pe->PELock); Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage); return FALSE; } th = ARG6; tb = ARG7; tr = ARG8; } } res = Yap_unify(th, ArgOfTerm(1, t)) && Yap_unify(tb, ArgOfTerm(2, t)) && Yap_unify(tr, rtn); if (res) Yap_ErLogUpdCl(cl); UNLOCK(pe->PELock); return res; } } static Int /* $hidden_predicate(P) */ p_log_update_clause_erase(USES_REGS1) { PredEntry *pe; Term t1 = Deref(ARG1); Int ret; yamop *new_cp; if (P->opc == EXECUTE_CPRED_OP_CODE) { new_cp = CP; } else { new_cp = P; } pe = Yap_get_pred(t1, Deref(ARG2), "clause/3"); if (pe == NULL || EndOfPAEntr(pe)) return FALSE; PELOCK(43, pe); ret = fetch_next_lu_clause_erase(pe, pe->CodeOfPred, t1, ARG3, ARG4, new_cp, TRUE); return ret; } static Int /* $hidden_predicate(P) */ p_continue_log_update_clause_erase(USES_REGS1) { PredEntry *pe = (PredEntry *)IntegerOfTerm(Deref(ARG1)); yamop *ipc = (yamop *)IntegerOfTerm(ARG2); PELOCK(44, pe); return fetch_next_lu_clause_erase(pe, ipc, Deref(ARG3), ARG4, ARG5, B->cp_cp, FALSE); } static void adjust_cl_timestamp(LogUpdClause *cl, UInt *arp, UInt *base) { UInt clstamp = cl->ClTimeEnd; if (cl->ClTimeEnd != TIMESTAMP_EOT) { while (arp[0] > clstamp) arp--; if (arp[0] == clstamp) { cl->ClTimeEnd = (arp - base); } else { cl->ClTimeEnd = (arp - base) + 1; } } clstamp = cl->ClTimeStart; while (arp[0] > clstamp) arp--; if (arp[0] == clstamp) { cl->ClTimeStart = (arp - base); } else { cl->ClTimeStart = (arp - base) + 1; } clstamp = cl->ClTimeEnd; } static Term replace_integer(Term orig, UInt new) { CELL *pt; if (IntInBnd((Int) new)) return MkIntTerm(new); /* should create an old integer */ if (!IsApplTerm(orig)) { CACHE_REGS Yap_Error(SYSTEM_ERROR_INTERNAL, orig, "%uld-->%uld where it should increase", (unsigned long int)IntegerOfTerm(orig), (unsigned long int)new); return MkIntegerTerm(new); } /* appl->appl */ /* replace integer in situ */ pt = RepAppl(orig) + 1; *pt = new; return orig; } static UInt tree_index_ssz(StaticIndex *x) { UInt sz = x->ClSize; x = x->ChildIndex; while (x != NULL) { sz += tree_index_ssz(x); x = x->SiblingIndex; } return sz; } static UInt index_ssz(StaticIndex *x, PredEntry *pe) { UInt sz = 0; yamop *ep = ExpandClausesFirst; if (pe->PredFlags & MegaClausePredFlag) { MegaClause *mcl = ClauseCodeToMegaClause(pe->cs.p_code.FirstClause); if (mcl->ClFlags & ExoMask) { struct index_t *i = ((struct index_t **)(pe->cs.p_code.FirstClause))[0]; sz = 0; while (i) { sz = i->size + sz; i = i->next; } return sz; } } /* expand clause blocks */ while (ep) { if (ep->y_u.sssllp.p == pe) sz += (UInt)NEXTOP((yamop *)NULL, sssllp) + ep->y_u.sssllp.s1 * sizeof(yamop *); ep = ep->y_u.sssllp.snext; } /* main indexing tree */ sz += tree_index_ssz(x); return sz; } #ifdef DEBUG static Int p_predicate_lu_cps(USES_REGS1) { return Yap_unify(ARG1, MkIntegerTerm(Yap_LiveCps)) && Yap_unify(ARG2, MkIntegerTerm(Yap_FreedCps)) && Yap_unify(ARG3, MkIntegerTerm(Yap_DirtyCps)) && Yap_unify(ARG4, MkIntegerTerm(Yap_NewCps)); } #endif static Int static_statistics(PredEntry *pe) { CACHE_REGS UInt sz = sizeof(PredEntry), cls = 0, isz = 0; StaticClause *cl = ClauseCodeToStaticClause(pe->cs.p_code.FirstClause); if (pe->cs.p_code.NOfClauses > 1 && pe->cs.p_code.TrueCodeOfPred != pe->cs.p_code.FirstClause) { isz = index_ssz(ClauseCodeToStaticIndex(pe->cs.p_code.TrueCodeOfPred), pe); } if (pe->PredFlags & MegaClausePredFlag) { MegaClause *mcl = ClauseCodeToMegaClause(pe->cs.p_code.FirstClause); return Yap_unify(ARG3, MkIntegerTerm(mcl->ClSize / mcl->ClItemSize)) && Yap_unify(ARG4, MkIntegerTerm(mcl->ClSize)) && Yap_unify(ARG5, MkIntegerTerm(isz)); } if (pe->cs.p_code.NOfClauses) { do { cls++; sz += cl->ClSize; if (cl->ClCode == pe->cs.p_code.LastClause) break; cl = cl->ClNext; } while (TRUE); } return Yap_unify(ARG3, MkIntegerTerm(cls)) && Yap_unify(ARG4, MkIntegerTerm(sz)) && Yap_unify(ARG5, MkIntegerTerm(isz)); } static Int p_static_pred_statistics(USES_REGS1) { Int out; PredEntry *pe; pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "predicate_statistics"); if (pe == NIL) return (FALSE); PELOCK(50, pe); if (pe->PredFlags & (DynamicPredFlag | LogUpdatePredFlag | UserCPredFlag | AsmPredFlag | CPredFlag | BinaryPredFlag)) { /* should use '$recordedp' in this case */ UNLOCK(pe->PELock); return FALSE; } out = static_statistics(pe); UNLOCK(pe->PELock); return out; } static Int p_predicate_erased_statistics(USES_REGS1) { UInt sz = 0, cls = 0; UInt isz = 0, icls = 0; PredEntry *pe; LogUpdClause *cl = DBErasedList; LogUpdIndex *icl = DBErasedIList; Term tpred = ArgOfTerm(2, Deref(ARG1)); Term tmod = ArgOfTerm(1, Deref(ARG1)); if (EndOfPAEntr(pe = Yap_get_pred(tpred, tmod, "predicate_erased_statistics"))) return FALSE; while (cl) { if (cl->ClPred == pe) { cls++; sz += cl->ClSize; } cl = cl->ClNext; } while (icl) { if (pe == icl->ClPred) { icls++; isz += icl->ClSize; } icl = icl->SiblingIndex; } return Yap_unify(ARG2, MkIntegerTerm(cls)) && Yap_unify(ARG3, MkIntegerTerm(sz)) && Yap_unify(ARG4, MkIntegerTerm(icls)) && Yap_unify(ARG5, MkIntegerTerm(isz)); } void Yap_UpdateTimestamps(PredEntry *ap) { CACHE_REGS choiceptr bptr = B; yamop *cl0 = NEXTOP(PredLogUpdClause0->CodeOfPred, Otapl); yamop *cl = NEXTOP(PredLogUpdClause->CodeOfPred, Otapl); yamop *cle = NEXTOP(PredLogUpdClauseErase->CodeOfPred, Otapl); arity_t ar = ap->ArityOfPE; UInt *arp, *top, *base; LogUpdClause *lcl; #if THREADS Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil, "Timestamp overflow %p", ap); return; #endif if (!ap->cs.p_code.NOfClauses) return; restart: *--ASP = TIMESTAMP_EOT; top = arp = (UInt *)ASP; while (bptr) { op_numbers opnum = Yap_op_from_opcode(bptr->cp_ap->opc); switch (opnum) { case _retry_logical: case _count_retry_logical: case _profiled_retry_logical: case _trust_logical: case _count_trust_logical: case _profiled_trust_logical: if (bptr->cp_ap->y_u.OtaLl.d->ClPred == ap) { UInt ts = IntegerOfTerm(bptr->cp_args[ar]); if (ts != arp[0]) { if (arp - HR < 1024) { goto overflow; } /* be thrifty, have this in case there is a hole */ if (ts != arp[0] - 1) { UInt x = arp[0]; *--arp = x; } *--arp = ts; } } bptr = bptr->cp_b; break; case _retry: if ((bptr->cp_ap == cl0 || bptr->cp_ap == cl || bptr->cp_ap == cle) && ((PredEntry *)IntegerOfTerm(bptr->cp_args[0]) == ap)) { UInt ts = IntegerOfTerm(bptr->cp_args[5]); if (ts != arp[0]) { if (arp - HR < 1024) { goto overflow; } if (ts != arp[0] - 1) { UInt x = arp[0]; *--arp = x; } *--arp = ts; } } bptr = bptr->cp_b; break; default: bptr = bptr->cp_b; continue; } } if (*arp) *--arp = 0L; base = arp; lcl = ClauseCodeToLogUpdClause(ap->cs.p_code.FirstClause); while (lcl) { adjust_cl_timestamp(lcl, top - 1, base); lcl = lcl->ClNext; } lcl = DBErasedList; while (lcl) { if (lcl->ClPred == ap) adjust_cl_timestamp(lcl, top - 1, base); lcl = lcl->ClNext; } arp = top - 1; bptr = B; while (bptr) { op_numbers opnum = Yap_op_from_opcode(bptr->cp_ap->opc); switch (opnum) { case _retry_logical: case _count_retry_logical: case _profiled_retry_logical: case _trust_logical: case _count_trust_logical: case _profiled_trust_logical: if (bptr->cp_ap->y_u.OtaLl.d->ClPred == ap) { UInt ts = IntegerOfTerm(bptr->cp_args[ar]); while (ts != arp[0]) arp--; bptr->cp_args[ar] = replace_integer(bptr->cp_args[ar], arp - base); } bptr = bptr->cp_b; break; case _retry: if ((bptr->cp_ap == cl0 || bptr->cp_ap == cl || bptr->cp_ap == cle) && ((PredEntry *)IntegerOfTerm(bptr->cp_args[0]) == ap)) { UInt ts = IntegerOfTerm(bptr->cp_args[5]); while (ts != arp[0]) arp--; bptr->cp_args[5] = replace_integer(bptr->cp_args[5], arp - base); } bptr = bptr->cp_b; break; default: bptr = bptr->cp_b; continue; } } return; overflow: if (!Yap_growstack(64 * 1024)) { Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage); return; } goto restart; } static Int fetch_next_static_clause(PredEntry *pe, yamop *i_code, Term th, Term tb, Term tr, yamop *cp_ptr, int first_time) { CACHE_REGS StaticClause *cl; Term rtn; Term Terms[3]; Terms[0] = th; Terms[1] = tb; Terms[2] = tr; cl = (StaticClause *)Yap_FollowIndexingCode( pe, i_code, Terms, NEXTOP(PredStaticClause->CodeOfPred, Otapl), cp_ptr); th = Deref(Terms[0]); tb = Deref(Terms[1]); tr = Deref(Terms[2]); /* don't do this!! I might have stored a choice-point and changed ASP Yap_RecoverSlots(3); */ if (cl == NULL) { UNLOCKPE(45, pe); return false; } if (pe->PredFlags & MegaClausePredFlag) { yamop *code = (yamop *)cl; rtn = Yap_MkMegaRefTerm(pe, code); if (!Yap_unify(tb, MkAtomTerm(AtomTrue)) || !Yap_unify(tr, rtn)) { UNLOCKPE(45, pe); return FALSE; } if (pe->ArityOfPE) { Functor f = FunctorOfTerm(th); arity_t arity = ArityOfFunctor(f), i; CELL *pt = RepAppl(th) + 1; for (i = 0; i < arity; i++) { XREGS[i + 1] = pt[i]; } /* don't need no ENV */ if (first_time && P->opc != EXECUTE_CPRED_OP_CODE) { CP = P; ENV = YENV; YENV = ASP; YENV[E_CB] = (CELL)B; } P = code; } UNLOCKPE(45, pe); return TRUE; } rtn = Yap_MkStaticRefTerm(cl, pe); if (cl->ClFlags & FactMask) { if (!Yap_unify(tb, MkAtomTerm(AtomTrue)) || !Yap_unify(tr, rtn)) { UNLOCKPE(45, pe); return FALSE; } if (pe->ArityOfPE) { Functor f = FunctorOfTerm(th); arity_t arity = ArityOfFunctor(f), i; CELL *pt = RepAppl(th) + 1; for (i = 0; i < arity; i++) { XREGS[i + 1] = pt[i]; } /* don't need no ENV */ if (first_time && P->opc != EXECUTE_CPRED_OP_CODE) { CP = P; ENV = YENV; YENV = ASP; YENV[E_CB] = (CELL)B; } P = cl->ClCode; } UNLOCKPE(45, pe); return true; } else { Term t; if (!(pe->PredFlags & SourcePredFlag)) { /* no source */ rtn = Yap_MkStaticRefTerm(cl, pe); UNLOCKPE(45, pe); return Yap_unify(tr, rtn); } while ((t = Yap_FetchClauseTermFromDB(cl->usc.ClSource)) == 0L) { if (first_time) { if (LOCAL_Error_TYPE == RESOURCE_ERROR_ATTRIBUTED_VARIABLES) { LOCAL_Error_TYPE = YAP_NO_ERROR; if (!Yap_growglobal(NULL)) { Yap_Error(RESOURCE_ERROR_ATTRIBUTED_VARIABLES, TermNil, LOCAL_ErrorMessage); UNLOCKPE(45, pe); return FALSE; } } else { LOCAL_Error_TYPE = YAP_NO_ERROR; ARG5 = th; ARG6 = tb; ARG7 = tr; if (!Yap_gc(7, ENV, gc_P(P, CP))) { Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage); UNLOCKPE(45, pe); return FALSE; } th = ARG5; tb = ARG6; tr = ARG7; } } else { LOCAL_Error_TYPE = YAP_NO_ERROR; ARG6 = th; ARG7 = tb; ARG8 = tr; if (!Yap_gcl(LOCAL_Error_Size, 8, ENV, CP)) { Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage); UNLOCKPE(45, pe); return FALSE; } th = ARG6; tb = ARG7; tr = ARG8; } } rtn = Yap_MkStaticRefTerm(cl, pe); UNLOCKPE(45, pe); if (!IsApplTerm(t) || FunctorOfTerm(t) != FunctorAssert) { return (Yap_unify(th, t) && Yap_unify(tb, MkAtomTerm(AtomTrue)) && Yap_unify(tr, rtn)); } else { return (Yap_unify(th, ArgOfTerm(1, t)) && Yap_unify(tb, ArgOfTerm(2, t)) && Yap_unify(tr, rtn)); } } } static Int /* $hidden_predicate(P) */ p_static_clause(USES_REGS1) { PredEntry *pe; Term t1 = Deref(ARG1); yamop *new_cp; if (P->opc == EXECUTE_CPRED_OP_CODE) { new_cp = CP; } else { new_cp = P; } pe = Yap_get_pred(t1, Deref(ARG2), "clause/3"); if (pe == NULL || EndOfPAEntr(pe)) return false; PELOCK(46, pe); return fetch_next_static_clause(pe, pe->CodeOfPred, ARG1, ARG3, ARG4, new_cp, true); } static Int /* $hidden_predicate(P) */ p_continue_static_clause(USES_REGS1) { PredEntry *pe = (PredEntry *)IntegerOfTerm(Deref(ARG1)); yamop *ipc = (yamop *)IntegerOfTerm(ARG2); PELOCK(48, pe); return fetch_next_static_clause(pe, ipc, Deref(ARG3), ARG4, ARG5, B->cp_ap, false); } static UInt compute_dbcl_size(arity_t arity) { UInt sz; switch (arity) { case 2: sz = (UInt)NEXTOP((yamop *)NULL, cc); break; case 3: sz = (UInt)NEXTOP((yamop *)NULL, ccc); break; case 4: sz = (UInt)NEXTOP((yamop *)NULL, cccc); break; case 5: sz = (UInt)NEXTOP((yamop *)NULL, ccccc); break; case 6: sz = (UInt)NEXTOP((yamop *)NULL, cccccc); break; default: sz = arity * (UInt)NEXTOP((yamop *)NULL, xc); break; } return (UInt)NEXTOP((yamop *)sz, p); } #define DerefAndCheck(t, V) \ t = Deref(V); \ if (IsVarTerm(t) || !(IsAtomOrIntTerm(t))) \ Yap_Error(TYPE_ERROR_ATOM, t0, "load_db"); static int store_dbcl_size(yamop *pc, arity_t arity, Term t0, PredEntry *pe) { Term t; CELL *tp = RepAppl(t0) + 1; switch (arity) { case 2: pc->opc = Yap_opcode(_get_2atoms); DerefAndCheck(t, tp[0]); pc->y_u.cc.c1 = t; DerefAndCheck(t, tp[1]); pc->y_u.cc.c2 = t; pc = NEXTOP(pc, cc); break; case 3: pc->opc = Yap_opcode(_get_3atoms); DerefAndCheck(t, tp[0]); pc->y_u.ccc.c1 = t; DerefAndCheck(t, tp[1]); pc->y_u.ccc.c2 = t; DerefAndCheck(t, tp[2]); pc->y_u.ccc.c3 = t; pc = NEXTOP(pc, ccc); break; case 4: pc->opc = Yap_opcode(_get_4atoms); DerefAndCheck(t, tp[0]); pc->y_u.cccc.c1 = t; DerefAndCheck(t, tp[1]); pc->y_u.cccc.c2 = t; DerefAndCheck(t, tp[2]); pc->y_u.cccc.c3 = t; DerefAndCheck(t, tp[3]); pc->y_u.cccc.c4 = t; pc = NEXTOP(pc, cccc); break; case 5: pc->opc = Yap_opcode(_get_5atoms); DerefAndCheck(t, tp[0]); pc->y_u.ccccc.c1 = t; DerefAndCheck(t, tp[1]); pc->y_u.ccccc.c2 = t; DerefAndCheck(t, tp[2]); pc->y_u.ccccc.c3 = t; DerefAndCheck(t, tp[3]); pc->y_u.ccccc.c4 = t; DerefAndCheck(t, tp[4]); pc->y_u.ccccc.c5 = t; pc = NEXTOP(pc, ccccc); break; case 6: pc->opc = Yap_opcode(_get_6atoms); DerefAndCheck(t, tp[0]); pc->y_u.cccccc.c1 = t; DerefAndCheck(t, tp[1]); pc->y_u.cccccc.c2 = t; DerefAndCheck(t, tp[2]); pc->y_u.cccccc.c3 = t; DerefAndCheck(t, tp[3]); pc->y_u.cccccc.c4 = t; DerefAndCheck(t, tp[4]); pc->y_u.cccccc.c5 = t; DerefAndCheck(t, tp[5]); pc->y_u.cccccc.c6 = t; pc = NEXTOP(pc, cccccc); break; default: { arity_t i; for (i = 0; i < arity; i++) { pc->opc = Yap_opcode(_get_atom); #if PRECOMPUTE_REGADDRESS pc->y_u.xc.x = (CELL)(XREGS + (i + 1)); #else pc->y_u.xc.x = i + 1; #endif DerefAndCheck(t, tp[0]); pc->y_u.xc.c = t; tp++; pc = NEXTOP(pc, xc); } } break; } pc->opc = Yap_opcode(_procceed); pc->y_u.p.p = pe; return TRUE; } static Int p_dbload_get_space(USES_REGS1) { /* '$number_of_clauses'(Predicate,M,N) */ Term t = Deref(ARG1); Term mod = Deref(ARG2); Term tn = Deref(ARG3); arity_t arity; Prop pe; PredEntry *ap; UInt sz; MegaClause *mcl; yamop *ptr; UInt ncls; UInt required; if (IsVarTerm(mod) || !IsAtomTerm(mod)) { return (FALSE); } if (IsAtomTerm(t)) { Atom a = AtomOfTerm(t); arity = 0; pe = PredPropByAtom(a, mod); } else if (IsApplTerm(t)) { register Functor f = FunctorOfTerm(t); arity = ArityOfFunctor(f); pe = PredPropByFunc(f, mod); } else { return FALSE; } if (EndOfPAEntr(pe)) return FALSE; ap = RepPredProp(pe); if (ap->PredFlags & (DynamicPredFlag | LogUpdatePredFlag #ifdef TABLING | TabledPredFlag #endif /* TABLING */ )) { Yap_Error(PERMISSION_ERROR_MODIFY_STATIC_PROCEDURE, t, "dbload_get_space/4"); return FALSE; } if (IsVarTerm(tn) || !IsIntegerTerm(tn)) { return FALSE; } ncls = IntegerOfTerm(tn); if (ncls <= 1) { return FALSE; } sz = compute_dbcl_size(arity); required = sz * ncls + sizeof(MegaClause) + (UInt)NEXTOP((yamop *)NULL, l); #ifdef DEBUG total_megaclause += required; nof_megaclauses++; #endif while (!(mcl = (MegaClause *)Yap_AllocCodeSpace(required))) { if (!Yap_growheap(FALSE, required, NULL)) { /* just fail, the system will keep on going */ return FALSE; } } Yap_ClauseSpace += required; /* cool, it's our turn to do the conversion */ mcl->ClFlags = MegaMask; mcl->ClSize = sz * ncls; mcl->ClPred = ap; mcl->ClItemSize = sz; mcl->ClNext = NULL; ap->cs.p_code.FirstClause = ap->cs.p_code.LastClause = mcl->ClCode; ap->PredFlags |= (MegaClausePredFlag); ap->cs.p_code.NOfClauses = ncls; if (ap->PredFlags & (SpiedPredFlag | CountPredFlag | ProfiledPredFlag)) { ap->OpcodeOfPred = Yap_opcode(_spy_pred); } else { ap->OpcodeOfPred = INDEX_OPCODE; } ap->CodeOfPred = ap->cs.p_code.TrueCodeOfPred = (yamop *)(&(ap->OpcodeOfPred)); ptr = (yamop *)((ADDR)mcl->ClCode + ncls * sz); ptr->opc = Yap_opcode(_Ystop); return Yap_unify(ARG4, MkIntegerTerm((Int)mcl)); } static Int p_dbassert(USES_REGS1) { /* '$number_of_clauses'(Predicate,M,N) */ Term thandle = Deref(ARG2); Term tn = Deref(ARG3); PredEntry *pe; MegaClause *mcl; Int n; if (IsVarTerm(thandle) || !IsIntegerTerm(thandle)) { return FALSE; } mcl = (MegaClause *)IntegerOfTerm(thandle); if (IsVarTerm(tn) || !IsIntegerTerm(tn)) { return FALSE; } n = IntegerOfTerm(tn); pe = mcl->ClPred; return store_dbcl_size((yamop *)((ADDR)mcl->ClCode + n * (mcl->ClItemSize)), pe->ArityOfPE, Deref(ARG1), pe); } #define CL_PROP_ERASED 0 #define CL_PROP_PRED 1 #define CL_PROP_FILE 2 #define CL_PROP_FACT 3 #define CL_PROP_LINE 4 #define CL_PROP_STREAM 5 /* instance(+Ref,?Term) */ static Int instance_property(USES_REGS1) { Term t1 = Deref(ARG1); DBRef dbr; Int op = IntOfTerm(Deref(ARG2)); if (IsVarTerm(t1) || !IsDBRefTerm(t1)) { if (IsApplTerm(t1)) { if (FunctorOfTerm(t1) == FunctorStaticClause) { StaticClause *cl = Yap_ClauseFromTerm(t1); if (op == CL_PROP_ERASED) { if (cl->ClFlags & ErasedMask) { if (!Yap_unify(ARG3, MkAtomTerm(AtomTrue))) return FALSE; } else { if (!Yap_unify(ARG3, MkAtomTerm(AtomFalse))) return FALSE; } } if (op == CL_PROP_PRED || op == CL_PROP_FILE || op == CL_PROP_STREAM) { PredEntry *ap = (PredEntry *)IntegerOfTerm(ArgOfTerm(2, t1)); if (!ap) { return FALSE; } if (op == CL_PROP_FILE) { if (ap->src.OwnerFile) return Yap_unify(ARG3, MkAtomTerm(ap->src.OwnerFile)); else return FALSE; } else { Term t[2]; if (ap->ArityOfPE == 0) { t[1] = MkAtomTerm((Atom)ap->FunctorOfPred); } else { Functor nf = ap->FunctorOfPred; arity_t arity = ArityOfFunctor(nf); Atom name = NameOfFunctor(nf); t[0] = MkAtomTerm(name); t[1] = MkIntegerTerm(arity); t[1] = Yap_MkApplTerm(FunctorSlash, 2, t); } if (ap->ModuleOfPred == PROLOG_MODULE) { t[0] = MkAtomTerm(AtomProlog); } else { t[0] = ap->ModuleOfPred; } return Yap_unify(ARG3, Yap_MkApplTerm(FunctorModule, 2, t)); } } if (op == CL_PROP_FACT) { if (cl->ClFlags & FactMask) { return Yap_unify(ARG3, MkAtomTerm(AtomTrue)); } else { return Yap_unify(ARG3, MkAtomTerm(AtomFalse)); } } if (op == CL_PROP_LINE) { if (cl->ClFlags & FactMask) { return Yap_unify(ARG3, MkIntTerm(cl->usc.ClLine)); } else if (cl->ClFlags & SrcMask) { return Yap_unify(ARG3, MkIntTerm(cl->usc.ClSource->ag.line_number)); } else return Yap_unify(ARG3, MkIntTerm(0)); } } else if (FunctorOfTerm(t1) == FunctorMegaClause) { PredEntry *ap = (PredEntry *)IntegerOfTerm(ArgOfTerm(1, t1)); MegaClause *mcl = ClauseCodeToMegaClause(ap->cs.p_code.FirstClause); if (op == CL_PROP_ERASED) { return FALSE; } if (op == CL_PROP_PRED || op == CL_PROP_FILE || op == CL_PROP_STREAM) { if (op == CL_PROP_FILE) { if (ap->src.OwnerFile) return Yap_unify(ARG3, MkAtomTerm(ap->src.OwnerFile)); else return FALSE; } else { Functor nf = ap->FunctorOfPred; arity_t arity = ArityOfFunctor(nf); Atom name = NameOfFunctor(nf); Term t[2]; t[0] = MkAtomTerm(name); t[1] = MkIntegerTerm(arity); t[1] = Yap_MkApplTerm(FunctorSlash, 2, t); if (ap->ModuleOfPred == PROLOG_MODULE) { t[0] = MkAtomTerm(AtomProlog); } else { t[0] = ap->ModuleOfPred; } return Yap_unify(ARG3, Yap_MkApplTerm(FunctorModule, 2, t)); } } if (op == CL_PROP_FACT) { return Yap_unify(ARG3, MkAtomTerm(AtomTrue)); } if (op == CL_PROP_LINE) { return Yap_unify(ARG3, MkIntTerm(mcl->ClLine)); } } } } else if ((dbr = DBRefOfTerm(t1))->Flags & LogUpdMask) { LogUpdClause *cl = (LogUpdClause *)dbr; if (op == CL_PROP_ERASED) { if (cl->ClFlags & ErasedMask) { if (!Yap_unify(ARG3, MkAtomTerm(AtomTrue))) return FALSE; } else { if (!Yap_unify(ARG3, MkAtomTerm(AtomFalse))) return FALSE; } } if (op == CL_PROP_PRED || op == CL_PROP_FILE) { PredEntry *ap = cl->ClPred; Term t[2]; if (op == CL_PROP_FILE) { if (ap->src.OwnerFile) return Yap_unify(ARG3, MkAtomTerm(ap->src.OwnerFile)); else return FALSE; } if (ap->ArityOfPE == 0) { t[1] = MkAtomTerm((Atom)ap->FunctorOfPred); } else { Functor nf = ap->FunctorOfPred; arity_t arity = ArityOfFunctor(nf); Atom name = NameOfFunctor(nf); t[0] = MkAtomTerm(name); t[1] = MkIntegerTerm(arity); t[1] = Yap_MkApplTerm(FunctorSlash, 2, t); } if (ap->ModuleOfPred == PROLOG_MODULE) { t[0] = MkAtomTerm(AtomProlog); } else { t[0] = ap->ModuleOfPred; } return Yap_unify(ARG3, Yap_MkApplTerm(FunctorModule, 2, t)); } if (op == CL_PROP_FACT) { if (cl->ClFlags & FactMask) { return Yap_unify(ARG3, MkAtomTerm(AtomTrue)); } else { return Yap_unify(ARG3, MkAtomTerm(AtomFalse)); } } if (op == CL_PROP_LINE) { if (cl->ClFlags & FactMask) { return Yap_unify(ARG3, MkIntTerm(cl->lusl.ClLine)); } else if (cl->ClFlags & SrcMask) { return Yap_unify(ARG3, MkIntTerm(cl->lusl.ClSource->ag.line_number)); } else return Yap_unify(ARG3, MkIntTerm(0)); } } return FALSE; } static Int p_nth_instance(USES_REGS1) { PredEntry *pe; arity_t pred_arity; Functor pred_f; Term pred_module; Term t4 = Deref(ARG4); if (IsVarTerm(t4)) { // we must know I or count; Term TCount; Int Count; TCount = Deref(ARG3); if (IsVarTerm(TCount)) { return FALSE; // backtrack? } if (!IsIntegerTerm(TCount)) { Yap_Error(TYPE_ERROR_INTEGER, TCount, "nth_instance/3"); return FALSE; } Count = IntegerOfTerm(TCount); if (Count <= 0) { if (Count) Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO, TCount, "nth_clause/3"); else Yap_Error(DOMAIN_ERROR_NOT_ZERO, TCount, "nth_clause/3"); return FALSE; } pe = Yap_get_pred(Deref(ARG1), Deref(ARG2), "nth_clause/3"); if (pe) { PELOCK(47, pe); } if (Deref(ARG2) == IDB_MODULE) { return Yap_db_nth_recorded(pe, Count PASS_REGS); } else { Int CurSlot, sl4; arity_t i; void *cl0; if (!pe) return FALSE; if (!(pe->PredFlags & (SourcePredFlag | LogUpdatePredFlag))) { UNLOCK(pe->PELock); return FALSE; } CurSlot = Yap_StartSlots(); /* I have pe and n */ sl4 = Yap_InitSlot(ARG4); /* in case we have to index or to expand code */ for (i = 1; i <= pe->ArityOfPE; i++) { XREGS[i] = MkVarTerm(); } if (pe->OpcodeOfPred == INDEX_OPCODE) { IPred(pe, 0, CP); } cl0 = Yap_NthClause(pe, Count); ARG4 = Yap_GetFromSlot(sl4); LOCAL_CurSlot = CurSlot; if (cl0 == NULL) { UNLOCK(pe->PELock); return FALSE; } if (pe->PredFlags & LogUpdatePredFlag) { LogUpdClause *cl = cl0; #if MULTIPLE_STACKS TRAIL_CLREF(cl); /* So that fail will erase it */ INC_CLREF_COUNT(cl); #else if (!(cl->ClFlags & InUseMask)) { cl->ClFlags |= InUseMask; TRAIL_CLREF(cl); /* So that fail will erase it */ } #endif UNLOCK(pe->PELock); return Yap_unify(MkDBRefTerm((DBRef)cl), ARG4); } else if (pe->PredFlags & MegaClausePredFlag) { MegaClause *mcl = ClauseCodeToMegaClause(pe->cs.p_code.FirstClause); if (mcl->ClFlags & ExoMask) { UNLOCK(pe->PELock); return Yap_unify(Yap_MkExoRefTerm(pe, Count - 1), ARG4); } /* fast access to nth element, all have same size */ UNLOCK(pe->PELock); return Yap_unify(Yap_MkMegaRefTerm(pe, cl0), ARG4); } else { UNLOCK(pe->PELock); return Yap_unify(Yap_MkStaticRefTerm(cl0, pe), ARG4); } } } /* t4 is bound, we have a reference */ if (IsDBRefTerm(t4)) { DBRef ref = DBRefOfTerm(t4); if (ref->Flags & LogUpdMask) { LogUpdClause *cl = (LogUpdClause *)ref; LogUpdClause *ocl; UInt icl = 0; pe = cl->ClPred; PELOCK(66, pe); if (cl->ClFlags & ErasedMask) { UNLOCK(pe->PELock); return FALSE; } ocl = ClauseCodeToLogUpdClause(pe->cs.p_code.FirstClause); do { icl++; if (cl == ocl) break; ocl = ocl->ClNext; } while (ocl != NULL); UNLOCK(pe->PELock); if (ocl == NULL) { return FALSE; } if (!Yap_unify(ARG3, MkIntegerTerm(icl))) { return FALSE; } } else { return Yap_unify_immediate_ref(ref PASS_REGS); } } else if (IsApplTerm(t4)) { Functor f = FunctorOfTerm(t4); if (f == FunctorStaticClause) { StaticClause *cl = Yap_ClauseFromTerm(t4), *cl0; pe = (PredEntry *)IntegerOfTerm(ArgOfTerm(2, t4)); Int i; if (!pe) { return FALSE; } if (!pe->cs.p_code.NOfClauses) return FALSE; cl0 = ClauseCodeToStaticClause(pe->cs.p_code.FirstClause); // linear scan for (i = 1; i < pe->cs.p_code.NOfClauses; i++) { if (cl0 == cl) { if (!Yap_unify(MkIntTerm(i), ARG3)) return FALSE; break; } } } else if (f == FunctorMegaClause) { MegaClause *mcl; yamop *cl = Yap_MegaClauseFromTerm(t4); Int i; pe = Yap_MegaClausePredicateFromTerm(t4); mcl = ClauseCodeToMegaClause(pe->cs.p_code.FirstClause); i = ((char *)cl - (char *)mcl->ClCode) / mcl->ClItemSize; if (!Yap_unify(MkIntTerm(i), ARG3)) return FALSE; } else if (f == FunctorExoClause) { Int i; pe = Yap_ExoClausePredicateFromTerm(t4); i = Yap_ExoClauseFromTerm(t4); if (!Yap_unify(MkIntTerm(i + 1), ARG3)) { return FALSE; } } else { Yap_Error(TYPE_ERROR_REFERENCE, t4, "nth_clause/3"); return FALSE; } } else { Yap_Error(TYPE_ERROR_REFERENCE, t4, "nth_clause/3"); return FALSE; } pred_module = pe->ModuleOfPred; if (pred_module != IDB_MODULE) { pred_f = pe->FunctorOfPred; pred_arity = pe->ArityOfPE; } else { if (pe->PredFlags & NumberDBPredFlag) { pred_f = (Functor)MkIntegerTerm(pe->src.IndxId); pred_arity = 0; } else { pred_f = pe->FunctorOfPred; if (pe->PredFlags & AtomDBPredFlag) { pred_arity = 0; } else { pred_arity = ArityOfFunctor(pred_f); } } } if (pred_arity) { if (!Yap_unify(ARG1, Yap_MkNewApplTerm(pred_f, pred_arity))) return FALSE; } else { if (!Yap_unify(ARG1, MkAtomTerm((Atom)pred_f))) return FALSE; } if (pred_module == PROLOG_MODULE) { if (!Yap_unify(ARG2, TermProlog)) return FALSE; } else { if (!Yap_unify(ARG2, pred_module)) return FALSE; } return TRUE; } static Int including(USES_REGS1) { bool rc = Yap_unify(ARG1, LOCAL_Including); if (!rc) return FALSE; LOCAL_Including = Deref(ARG2); return true; } static Int predicate_flags( USES_REGS1) { /* $predicate_flags(+Functor,+Mod,?OldFlags,?NewFlags) */ PredEntry *pe; pred_flags_t newFl; Term t1 = Deref(ARG1); Term mod = Deref(ARG2); if (IsVarTerm(mod) || !IsAtomTerm(mod)) { return false; } if (IsVarTerm(t1)) return (FALSE); if (IsAtomTerm(t1)) { while ((pe = RepPredProp(PredPropByAtom(AtomOfTerm(t1), mod))) == NULL) { if (!Yap_growheap(FALSE, 0, NULL)) { Yap_Error(RESOURCE_ERROR_HEAP, ARG1, "while generating new predicate"); return FALSE; } t1 = Deref(ARG1); mod = Deref(ARG2); } } else if (IsApplTerm(t1)) { Functor funt = FunctorOfTerm(t1); while ((pe = RepPredProp(PredPropByFunc(funt, mod))) == NULL) { if (!Yap_growheap(FALSE, 0, NULL)) { Yap_Error(RESOURCE_ERROR_HEAP, ARG1, "while generating new predicate"); return FALSE; } t1 = Deref(ARG1); mod = Deref(ARG2); } } else return (FALSE); if (EndOfPAEntr(pe)) return (FALSE); PELOCK(92, pe); if (!Yap_unify_constant(ARG3, MkIntegerTerm(pe->PredFlags))) { UNLOCK(pe->PELock); return (FALSE); } ARG4 = Deref(ARG4); if (IsVarTerm(ARG4)) { UNLOCK(pe->PELock); return (TRUE); } else if (!IsIntegerTerm(ARG4)) { Term te = Yap_Eval(ARG4); if (IsIntegerTerm(te)) { newFl = IntegerOfTerm(te); } else { UNLOCK(pe->PELock); Yap_Error(TYPE_ERROR_INTEGER, ARG4, "flags"); return (FALSE); } } else newFl = IntegerOfTerm(ARG4); pe->PredFlags = newFl; UNLOCK(pe->PELock); return TRUE; } static bool pred_flag_clause(Functor f, Term mod, const char *name, pred_flags_t val USES_REGS) { Term tn; Term s[2]; s[0] = MkAtomTerm(Yap_LookupAtom(name)); #if SIZEOF_INT_P == 8 s[1] = MkIntegerTerm(val); #elif USE_GMP { char text[64]; MP_INT rop; #ifdef _WIN32 snprintf(text, 64, "%I64d", (long long int)val); #elif HAVE_SNPRINTF snprintf(text, 64, "%lld", (long long int)val); #else sprintf(text, "%lld", (long long int)val); #endif mpz_init_set_str(&rop, text, 10); s[1] = Yap_MkBigIntTerm((void *)&rop); } #endif tn = Yap_MkApplTerm(f, 2, s); yamop *code_adr = Yap_cclause(tn, 2, mod, tn); /* vsc: give the number of arguments to cclause() in case there is a overflow */ if (LOCAL_ErrorMessage) { return false; } return Yap_addclause(tn, code_adr, TermAssertz, mod, NULL); } struct pred_entry *Yap_MkLogPred(struct pred_entry *pe) { pe->PredFlags = LogUpdatePredFlag; pe->OpcodeOfPred = FAIL_OPCODE; pe->cs.p_code.TrueCodeOfPred = pe->CodeOfPred = FAILCODE; return pe; } static Int init_pred_flag_vals(USES_REGS1) { Functor f; Term mod = Deref(ARG2), t = Deref(ARG1); if (IsAtomTerm(t)) { return false; } else if (IsApplTerm(t)) { f = FunctorOfTerm(t); arity_t Arity = ArityOfFunctor(f); if (Arity != 2) return false; } else { return false; } pred_flag_clause(f, mod, "asm", AsmPredFlag PASS_REGS); pred_flag_clause(f, mod, "atom_db", AtomDBPredFlag PASS_REGS); pred_flag_clause(f, mod, "back_c", BackCPredFlag PASS_REGS); pred_flag_clause(f, mod, "c", CPredFlag PASS_REGS); pred_flag_clause(f, mod, "c_args", CArgsPredFlag PASS_REGS); pred_flag_clause(f, mod, "compiled", CompiledPredFlag PASS_REGS); pred_flag_clause(f, mod, "count", CountPredFlag PASS_REGS); pred_flag_clause(f, mod, "discontiguous", DiscontiguousPredFlag PASS_REGS); pred_flag_clause(f, mod, "immediate_update", DynamicPredFlag PASS_REGS); pred_flag_clause(f, mod, "hidden", HiddenPredFlag PASS_REGS); pred_flag_clause(f, mod, "in_use", InUsePredFlag PASS_REGS); pred_flag_clause(f, mod, "indexed", IndexedPredFlag PASS_REGS); pred_flag_clause(f, mod, "log_update", LogUpdatePredFlag PASS_REGS); pred_flag_clause(f, mod, "mega_clause", MegaClausePredFlag PASS_REGS); pred_flag_clause(f, mod, "meta", MetaPredFlag PASS_REGS); pred_flag_clause(f, mod, "module_transparent", ModuleTransparentPredFlag PASS_REGS); pred_flag_clause(f, mod, "multi", MultiFileFlag PASS_REGS); pred_flag_clause(f, mod, "no_spy", NoSpyPredFlag PASS_REGS); pred_flag_clause(f, mod, "no_trace", NoTracePredFlag PASS_REGS); pred_flag_clause(f, mod, "number_db", NumberDBPredFlag PASS_REGS); pred_flag_clause(f, mod, "profiled", ProfiledPredFlag PASS_REGS); pred_flag_clause(f, mod, "quasi_quotation", QuasiQuotationPredFlag PASS_REGS); pred_flag_clause(f, mod, "safe", SafePredFlag PASS_REGS); pred_flag_clause(f, mod, "sequential", SequentialPredFlag PASS_REGS); pred_flag_clause(f, mod, "source", SourcePredFlag PASS_REGS); pred_flag_clause(f, mod, "spied", SpiedPredFlag PASS_REGS); pred_flag_clause(f, mod, "standard", StandardPredFlag PASS_REGS); pred_flag_clause(f, mod, "swi_env", SWIEnvPredFlag PASS_REGS); pred_flag_clause(f, mod, "sync", SyncPredFlag PASS_REGS); pred_flag_clause(f, mod, "sys_export", SysExportPredFlag PASS_REGS); pred_flag_clause(f, mod, "tabled", TabledPredFlag PASS_REGS); pred_flag_clause(f, mod, "test", TestPredFlag PASS_REGS); pred_flag_clause(f, mod, "thread_local", ThreadLocalPredFlag PASS_REGS); pred_flag_clause(f, mod, "udi", UDIPredFlag PASS_REGS); pred_flag_clause(f, mod, "user_c", UserCPredFlag PASS_REGS); pred_flag_clause(f, mod, "system", SystemPredFlags PASS_REGS); pred_flag_clause(f, mod, "foreign", ForeignPredFlags PASS_REGS); return true; } void Yap_InitCdMgr(void) { CACHE_REGS Term cm = CurrentModule; Yap_InitCPred("$init_pred_flag_vals", 2, init_pred_flag_vals, SyncPredFlag); Yap_InitCPred("$start_consult", 3, p_startconsult, SafePredFlag | SyncPredFlag); Yap_InitCPred("$show_consult_level", 1, p_showconslultlev, SafePredFlag); Yap_InitCPred("$end_consult", 0, p_endconsult, SafePredFlag | SyncPredFlag); Yap_InitCPred("$set_spy", 2, p_setspy, SyncPredFlag); Yap_InitCPred("$rm_spy", 2, p_rmspy, SafePredFlag | SyncPredFlag); /* gc() may happen during compilation, hence these predicates are now unsafe */ Yap_InitCPred("$predicate_flags", 4, predicate_flags, SyncPredFlag); Yap_InitCPred("$compile", 5, p_compile, SyncPredFlag); Yap_InitCPred("$purge_clauses", 2, p_purge_clauses, SafePredFlag | SyncPredFlag); Yap_InitCPred("$is_dynamic", 2, p_is_dynamic, TestPredFlag | SafePredFlag); Yap_InitCPred("$is_metapredicate", 2, p_is_metapredicate, TestPredFlag | SafePredFlag); Yap_InitCPred("$is_log_updatable", 2, p_is_log_updatable, TestPredFlag | SafePredFlag); Yap_InitCPred("$is_thread_local", 2, p_is_thread_local, TestPredFlag | SafePredFlag); Yap_InitCPred("$is_source", 2, p_is_source, TestPredFlag | SafePredFlag); Yap_InitCPred("$is_exo", 2, p_is_exo, TestPredFlag | SafePredFlag); Yap_InitCPred("$owner_file", 3, owner_file, SafePredFlag); Yap_InitCPred("$set_owner_file", 3, p_set_owner_file, SafePredFlag); Yap_InitCPred("$mk_dynamic", 2, mk_dynamic, SafePredFlag); Yap_InitCPred("$new_meta_pred", 2, new_meta_pred, SafePredFlag); Yap_InitCPred("$sys_export", 2, p_sys_export, TestPredFlag | SafePredFlag); Yap_InitCPred("$pred_exists", 2, p_pred_exists, TestPredFlag | SafePredFlag); Yap_InitCPred("$number_of_clauses", 3, number_of_clauses, SafePredFlag | SyncPredFlag); Yap_InitCPred("$undefined", 2, p_undefined, SafePredFlag | TestPredFlag); Yap_InitCPred("$undefp_handler", 2, undefp_handler, SafePredFlag | TestPredFlag); Yap_InitCPred("$optimizer_on", 0, p_optimizer_on, SafePredFlag | SyncPredFlag); Yap_InitCPred("$clean_up_dead_clauses", 0, p_clean_up_dead_clauses, SyncPredFlag); Yap_InitCPred("$optimizer_off", 0, p_optimizer_off, SafePredFlag | SyncPredFlag); Yap_InitCPred("$kill_dynamic", 2, p_kill_dynamic, SafePredFlag | SyncPredFlag); Yap_InitCPred("$new_multifile", 2, new_multifile, SafePredFlag | SyncPredFlag | HiddenPredFlag); Yap_InitCPred("$is_multifile", 2, p_is_multifile, TestPredFlag | SafePredFlag); Yap_InitCPred("$new_system_predicate", 3, new_system_predicate, SafePredFlag | SyncPredFlag); Yap_InitCPred("$is_system_predicate", 2, p_is_system_predicate, TestPredFlag | SafePredFlag); Yap_InitCPred("$is_opaque_predicate", 2, p_is_opaque_predicate, TestPredFlag | SafePredFlag); Yap_InitCPred("$new_discontiguous", 3, p_new_discontiguous, SafePredFlag | SyncPredFlag); Yap_InitCPred("$is_discontiguous", 2, p_is_discontiguous, TestPredFlag | SafePredFlag); Yap_InitCPred("$is_no_trace", 2, p_is_no_trace, TestPredFlag | SafePredFlag); Yap_InitCPred("$set_no_trace", 2, p_set_no_trace, TestPredFlag | SafePredFlag); Yap_InitCPred("$is_profiled", 1, p_is_profiled, SafePredFlag | SyncPredFlag); Yap_InitCPred("$profile_info", 3, p_profile_info, SafePredFlag | SyncPredFlag); Yap_InitCPred("$profile_reset", 2, p_profile_reset, SafePredFlag | SyncPredFlag); Yap_InitCPred("$is_call_counted", 1, p_is_call_counted, SafePredFlag | SyncPredFlag); Yap_InitCPred("$call_count_info", 3, p_call_count_info, SafePredFlag | SyncPredFlag); Yap_InitCPred("$call_count_set", 6, p_call_count_set, SafePredFlag | SyncPredFlag); Yap_InitCPred("$call_count_reset", 0, p_call_count_reset, SafePredFlag | SyncPredFlag); Yap_InitCPred("$set_pred_module", 2, p_set_pred_module, SafePredFlag); Yap_InitCPred("$set_pred_owner", 2, p_set_pred_owner, SafePredFlag); Yap_InitCPred("$hide_predicate", 2, hide_predicate, SafePredFlag); Yap_InitCPred("$stash_predicate", 2, p_stash_predicate, SafePredFlag); Yap_InitCPred("$hidden_predicate", 2, p_hidden_predicate, SafePredFlag); Yap_InitCPred("$log_update_clause", 4, p_log_update_clause, SyncPredFlag); Yap_InitCPred("$continue_log_update_clause", 5, p_continue_log_update_clause, SafePredFlag | SyncPredFlag); Yap_InitCPred("$log_update_clause_erase", 4, p_log_update_clause_erase, SyncPredFlag); Yap_InitCPred("$continue_log_update_clause_erase", 5, p_continue_log_update_clause_erase, SafePredFlag | SyncPredFlag); Yap_InitCPred("$static_clause", 4, p_static_clause, SyncPredFlag); Yap_InitCPred("$continue_static_clause", 5, p_continue_static_clause, SafePredFlag | SyncPredFlag); Yap_InitCPred("$static_pred_statistics", 5, p_static_pred_statistics, SyncPredFlag); Yap_InitCPred("instance_property", 3, instance_property, SafePredFlag | SyncPredFlag); Yap_InitCPred("$fetch_nth_clause", 4, p_nth_instance, SyncPredFlag); CurrentModule = DBLOAD_MODULE; Yap_InitCPred("dbload_get_space", 4, p_dbload_get_space, 0L); Yap_InitCPred("dbassert", 3, p_dbassert, 0L); CurrentModule = cm; Yap_InitCPred("$predicate_erased_statistics", 5, p_predicate_erased_statistics, SyncPredFlag); Yap_InitCPred("$including", 2, including, SyncPredFlag | HiddenPredFlag); #ifdef DEBUG Yap_InitCPred("$predicate_lu_cps", 4, p_predicate_lu_cps, 0L); #endif }