c9247ce308
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@977 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
1632 lines
39 KiB
C
1632 lines
39 KiB
C
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: exec.c *
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* Last rev: 8/2/88 *
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* mods: *
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* comments: Execute Prolog code *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "@(#)cdmgr.c 1.1 05/02/98";
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#endif
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#include "absmi.h"
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#include "yapio.h"
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STATIC_PROTO(Int CallPredicate, (PredEntry *, choiceptr));
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STATIC_PROTO(Int EnterCreepMode, (Term, SMALLUNSGN));
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STATIC_PROTO(Int CallClause, (PredEntry *, Int));
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STATIC_PROTO(Int p_save_cp, (void));
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STATIC_PROTO(Int p_execute, (void));
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STATIC_PROTO(Int p_execute0, (void));
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STATIC_PROTO(Int p_at_execute, (void));
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static Term
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cp_as_integer(choiceptr cp)
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{
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return(MkIntTerm(LCL0-(CELL *)cp));
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}
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Term
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Yap_cp_as_integer(choiceptr cp)
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{
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return cp_as_integer(cp);
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}
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static inline Int
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CallPredicate(PredEntry *pen, choiceptr cut_pt) {
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#ifdef LOW_LEVEL_TRACER
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if (Yap_do_low_level_trace)
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low_level_trace(enter_pred,pen,XREGS+1);
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#endif /* LOW_LEVEL_TRACE */
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READ_LOCK(pen->PRWLock);
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#ifdef DEPTH_LIMIT
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if (DEPTH <= MkIntTerm(1)) {/* I assume Module==0 is prolog */
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if (pen->ModuleOfPred) {
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if (DEPTH == MkIntTerm(0))
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return FALSE;
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else DEPTH = RESET_DEPTH();
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}
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} else if (pen->ModuleOfPred)
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DEPTH -= MkIntConstant(2);
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#endif /* DEPTH_LIMIT */
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CP = P;
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P = pen->CodeOfPred;
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/* vsc: increment reduction counter at meta-call entry */
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READ_UNLOCK(pen->PRWLock);
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if (pen->PredFlags & ProfiledPredFlag) {
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LOCK(pen->StatisticsForPred.lock);
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pen->StatisticsForPred.NOfEntries++;
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UNLOCK(pen->StatisticsForPred.lock);
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}
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ENV = YENV;
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YENV = ASP;
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YENV[E_CB] = (CELL) cut_pt;
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return (TRUE);
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}
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inline static Int
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CallMetaCall(SMALLUNSGN mod) {
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ARG2 = cp_as_integer(B); /* p_save_cp */
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ARG3 = ARG1;
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ARG4 = ModuleName[mod];
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return (CallPredicate(PredMetaCall, B));
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}
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Term
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Yap_ExecuteCallMetaCall(SMALLUNSGN mod) {
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Term ts[4];
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ts[0] = ARG1;
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ts[1] = cp_as_integer(B); /* p_save_cp */
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ts[2] = ARG1;
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ts[3] = ModuleName[mod];
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return(Yap_MkApplTerm(PredMetaCall->FunctorOfPred,4,ts));
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}
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static Int
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CallError(yap_error_number err, SMALLUNSGN mod)
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{
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if (yap_flags[LANGUAGE_MODE_FLAG] == 1) {
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return(CallMetaCall(mod));
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} else {
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Yap_Error(err, ARG1, "call/1");
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return(FALSE);
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}
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}
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static Int
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CallClause(PredEntry *pen, Int position)
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{
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CELL flags;
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if (position == -1) return(CallPredicate(pen, B));
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READ_LOCK(pen->PRWLock);
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flags = pen->PredFlags;
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if ((flags & (CompiledPredFlag | DynamicPredFlag)) ||
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pen->OpcodeOfPred == UNDEF_OPCODE) {
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yamop *q;
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#ifdef DEPTH_LIMIT
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if (DEPTH <= MkIntTerm(1)) {/* I assume Module==0 is prolog */
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if (pen->ModuleOfPred) {
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if (DEPTH == MkIntTerm(0))
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return(FALSE);
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else DEPTH = RESET_DEPTH();
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}
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} else if (pen->ModuleOfPred)
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DEPTH -= MkIntConstant(2);
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#endif /* DEPTH_LIMIT */
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#ifdef LOW_LEVEL_TRACER
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if (Yap_do_low_level_trace)
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low_level_trace(enter_pred,pen,XREGS+1);
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#endif /* LOW_LEVEL_TRACE */
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ENV = YENV;
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YENV = ASP;
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YENV[E_CB] = (CELL)(B->cp_b);
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CP = P;
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q = pen->cs.p_code.FirstClause;
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if (pen->PredFlags & ProfiledPredFlag) {
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LOCK(pen->StatisticsForPred.lock);
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if (position == 1)
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pen->StatisticsForPred.NOfEntries++;
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else
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pen->StatisticsForPred.NOfRetries++;
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UNLOCK(pen->StatisticsForPred.lock);
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}
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if (flags & DynamicPredFlag) {
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CLAUSECODE->arity = pen->ArityOfPE;
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CLAUSECODE->func = pen->FunctorOfPred;
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while (position > 1) {
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while (ClauseCodeToDynamicClause(q)->ClFlags & ErasedMask)
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q = NextDynamicClause(q);
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position--;
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q = NextDynamicClause(q);
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}
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while (ClauseCodeToDynamicClause(q)->ClFlags & ErasedMask)
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q = NextDynamicClause(q);
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#if defined(YAPOR) || defined(THREADS)
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{
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DynamicClause *cl = ClauseCodeToDynamicClause(q);
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LOCK(cl->ClLock);
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TRAIL_CLREF(cl);
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INC_CLREF_COUNT(cl);
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UNLOCK(cl->ClLock);
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}
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#else
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if (!(ClauseCodeToDynamicClause(q)->ClFlags & InUseMask)) {
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CELL *opp = &(ClauseCodeToDynamicClause(q)->ClFlags);
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TRAIL_CLREF(ClauseCodeToDynamicClause(q));
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*opp |= InUseMask;
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}
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#endif
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READ_UNLOCK(pen->PRWLock);
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CLAUSECODE->clause = NEXTOP(q,ld);
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P = CLAUSECODE->clause;
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return((CELL)(&(CLAUSECODE->clause)));
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} else if (flags & LogUpdatePredFlag) {
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LogUpdClause *cl = ClauseCodeToLogUpdClause(q);
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for (; position > 1; position--)
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cl = cl->ClNext;
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READ_UNLOCK(pen->PRWLock);
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P = cl->ClCode;
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return (Unsigned(pen));
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} else {
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/* static clause */
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LogUpdClause *cl = ClauseCodeToLogUpdClause(q);
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for (; position > 1; position--)
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cl = cl->ClNext;
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READ_UNLOCK(pen->PRWLock);
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P = cl->ClCode;
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return (Unsigned(pen));
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}
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} else {
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Yap_Error(SYSTEM_ERROR,ARG1,"debugger tries to debug clause for builtin");
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return (FALSE);
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}
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}
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static Int
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p_save_cp(void)
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{
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Term t = Deref(ARG1);
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Term td;
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#if SHADOW_HB
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register CELL *HBREG = HB;
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#endif
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if (!IsVarTerm(t)) return(FALSE);
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td = cp_as_integer(B);
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BIND((CELL *)t,td,bind_save_cp);
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#ifdef COROUTINING
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DO_TRAIL(CellPtr(t), td);
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if (CellPtr(t) < H0) Yap_WakeUp((CELL *)t);
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bind_save_cp:
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#endif
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return(TRUE);
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}
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inline static Int
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do_execute(Term t, SMALLUNSGN mod)
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{
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if (ActiveSignals) {
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return(EnterCreepMode(t, mod));
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} else if (PRED_GOAL_EXPANSION_ON) {
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return(CallMetaCall(mod));
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}
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restart_exec:
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if (IsVarTerm(t)) {
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return CallError(INSTANTIATION_ERROR, mod);
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} else if (IsApplTerm(t)) {
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register Functor f = FunctorOfTerm(t);
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register CELL *pt;
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PredEntry *pen;
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unsigned int i, arity;
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f = FunctorOfTerm(t);
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if (IsExtensionFunctor(f)) {
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return CallError(TYPE_ERROR_CALLABLE, mod);
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}
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arity = ArityOfFunctor(f);
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pen = RepPredProp(PredPropByFunc(f, mod));
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/* You thought we would be over by now */
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/* but no meta calls require special preprocessing */
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if (pen->PredFlags & MetaPredFlag) {
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if (f == FunctorModule) {
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Term tmod = ArgOfTerm(1,t);
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if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
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mod = Yap_LookupModule(tmod);
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t = ArgOfTerm(2,t);
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goto restart_exec;
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}
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} else {
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return(CallMetaCall(mod));
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}
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}
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/* now let us do what we wanted to do from the beginning !! */
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/* I cannot use the standard macro here because
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otherwise I would dereference the argument and
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might skip a svar */
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pt = RepAppl(t)+1;
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for (i = 1; i <= arity; i++) {
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#if SBA
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Term d0 = *pt++;
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if (d0 == 0)
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` XREGS[i] = (CELL)(pt-1);
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else
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XREGS[i] = d0;
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#else
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XREGS[i] = *pt++;
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#endif
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}
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return (CallPredicate(pen, B));
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} else if (IsAtomTerm(t)) {
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PredEntry *pe;
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Atom a = AtomOfTerm(t);
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if (a == AtomTrue || a == AtomOtherwise || a == AtomCut)
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return(TRUE);
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else if (a == AtomFail || a == AtomFalse)
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return(FALSE);
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/* call may not define new system predicates!! */
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pe = RepPredProp(PredPropByAtom(a, mod));
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return (CallPredicate(pe, B));
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} else if (IsIntTerm(t)) {
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return CallError(TYPE_ERROR_CALLABLE, mod);
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} else {
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/* Is Pair Term */
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return(CallMetaCall(mod));
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}
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}
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static Int
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EnterCreepMode(Term t, SMALLUNSGN mod) {
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PredEntry *PredCreep;
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if (ActiveSignals & YAP_CDOVF_SIGNAL) {
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ARG1 = t;
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if (!Yap_growheap(FALSE, 0, NULL)) {
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Yap_Error(FATAL_ERROR, TermNil, "YAP failed to grow heap at meta-call");
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}
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if (!ActiveSignals) {
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return do_execute(ARG1, mod);
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}
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}
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PredCreep = RepPredProp(PredPropByFunc(FunctorCreep,1));
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ARG1 = MkPairTerm(ModuleName[mod],ARG1);
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LOCK(SignalLock);
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CreepFlag = CalculateStackGap();
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UNLOCK(SignalLock);
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P_before_spy = P;
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return (CallPredicate(PredCreep, B));
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}
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static Int
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p_execute(void)
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{ /* '$execute'(Goal) */
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Term t = Deref(ARG1);
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return(do_execute(t, CurrentModule));
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}
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static Int
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p_execute_in_mod(void)
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{ /* '$execute'(Goal) */
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return(do_execute(Deref(ARG1), IntOfTerm(Deref(ARG2))));
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}
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static Int
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p_execute0(void)
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{ /* '$execute0'(Goal,Mod) */
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Term t = Deref(ARG1);
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Term tmod = Deref(ARG2);
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unsigned int arity;
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Prop pe;
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SMALLUNSGN mod = Yap_LookupModule(tmod);
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restart_exec:
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if (IsVarTerm(t)) {
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Yap_Error(INSTANTIATION_ERROR,ARG3,"call/1");
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return(FALSE);
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} else if (IsAtomTerm(t)) {
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Atom a = AtomOfTerm(t);
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pe = PredPropByAtom(a, mod);
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} else if (IsApplTerm(t)) {
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register Functor f = FunctorOfTerm(t);
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register unsigned int i;
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register CELL *pt;
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if (IsExtensionFunctor(f))
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return(FALSE);
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if (f == FunctorModule) {
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Term tmod = ArgOfTerm(1,t);
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if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
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mod = Yap_LookupModule(tmod);
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t = ArgOfTerm(2,t);
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goto restart_exec;
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}
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}
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pe = PredPropByFunc(f, mod);
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arity = ArityOfFunctor(f);
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/* I cannot use the standard macro here because
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otherwise I would dereference the argument and
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might skip a svar */
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pt = RepAppl(t)+1;
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for (i = 1; i <= arity; ++i) {
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#if SBA
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Term d0 = *pt++;
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if (d0 == 0)
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XREGS[i] = (CELL)(pt-1);
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else
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XREGS[i] = d0;
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#else
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XREGS[i] = *pt++;
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#endif
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}
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} else {
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Yap_Error(TYPE_ERROR_CALLABLE,ARG3,"call/1");
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return(FALSE);
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}
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/* N = arity; */
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/* call may not define new system predicates!! */
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return (CallPredicate(RepPredProp(pe), B));
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}
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static Int
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p_execute_0(void)
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{ /* '$execute_0'(Goal) */
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Term t = Deref(ARG1);
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SMALLUNSGN mod = Yap_LookupModule(Deref(ARG2));
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Prop pe;
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if (IsAtomTerm(t)) {
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Atom a;
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a = AtomOfTerm(t);
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pe = PredPropByAtom(a, mod);
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} else if (IsApplTerm(t)) {
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Functor f = FunctorOfTerm(t);
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Int Arity, i;
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CELL *ptr;
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if (IsExtensionFunctor(f)) {
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Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/1");
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return(FALSE);
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}
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pe = PredPropByFunc(f, mod);
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Arity = ArityOfFunctor(f);
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ptr = RepAppl(t)+1;
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for (i=1;i<=Arity;i++) {
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XREGS[i] = *ptr++;
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}
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} else {
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CELL *ptr;
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pe = PredPropByFunc(Yap_MkFunctor(AtomDot,2), mod);
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ptr = RepPair(t);
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XREGS[1] = ptr[0];
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XREGS[2] = ptr[1];
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}
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return (CallPredicate(RepPredProp(pe), B));
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}
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static Int
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p_execute_1(void)
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{ /* '$execute_0'(Goal) */
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Term t = Deref(ARG1);
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SMALLUNSGN mod = Yap_LookupModule(Deref(ARG3));
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Prop pe;
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if (!IsAtomTerm(t)) {
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Yap_Error(TYPE_ERROR_ATOM,ARG1,"call_with_args/2");
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return(FALSE);
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}
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if (IsAtomTerm(t)) {
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Atom a;
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a = AtomOfTerm(t);
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ARG1 = ARG2;
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pe = PredPropByFunc(Yap_MkFunctor(a,1),mod);
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} else if (IsApplTerm(t)) {
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Functor f = FunctorOfTerm(t);
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Int Arity, i;
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Atom a;
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CELL *ptr;
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|
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if (IsExtensionFunctor(f)) {
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Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/2");
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return(FALSE);
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}
|
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Arity = ArityOfFunctor(f);
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a = NameOfFunctor(f);
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pe = PredPropByFunc(Yap_MkFunctor(a,Arity+1), mod);
|
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XREGS[Arity+1] = ARG2;
|
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ptr = RepAppl(t)+1;
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for (i=1;i<=Arity;i++) {
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XREGS[i] = *ptr++;
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}
|
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} else {
|
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CELL *ptr;
|
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|
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pe = PredPropByFunc(Yap_MkFunctor(AtomDot,3), mod);
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ptr = RepPair(t);
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XREGS[3] = ARG2;
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XREGS[1] = ptr[0];
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XREGS[2] = ptr[1];
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}
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return (CallPredicate(RepPredProp(pe), B));
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}
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static Int
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p_execute_2(void)
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{ /* '$execute_2'(Goal) */
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Term t = Deref(ARG1);
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SMALLUNSGN mod = Yap_LookupModule(Deref(ARG4));
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Prop pe;
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|
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if (IsAtomTerm(t)) {
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Atom a;
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a = AtomOfTerm(t);
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ARG1 = ARG2;
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ARG2 = ARG3;
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pe = PredPropByFunc(Yap_MkFunctor(a,2),mod);
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} else if (IsApplTerm(t)) {
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Functor f = FunctorOfTerm(t);
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Int Arity, i;
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Atom a;
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CELL *ptr;
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if (IsExtensionFunctor(f)) {
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Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/3");
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return(FALSE);
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}
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Arity = ArityOfFunctor(f);
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a = NameOfFunctor(f);
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pe = PredPropByFunc(Yap_MkFunctor(a,Arity+2), mod);
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XREGS[Arity+2] = ARG3;
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XREGS[Arity+1] = ARG2;
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ptr = RepAppl(t)+1;
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for (i=1;i<=Arity;i++) {
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XREGS[i] = *ptr++;
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}
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} else {
|
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CELL *ptr;
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pe = PredPropByFunc(Yap_MkFunctor(AtomDot,4), mod);
|
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ptr = RepPair(t);
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XREGS[4] = ARG3;
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XREGS[3] = ARG2;
|
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XREGS[1] = ptr[0];
|
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XREGS[2] = ptr[1];
|
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}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
static Int
|
|
p_execute_3(void)
|
|
{ /* '$execute_3'(Goal) */
|
|
Term t = Deref(ARG1);
|
|
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG5));
|
|
Prop pe;
|
|
|
|
if (!IsAtomTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_ATOM,ARG1,"call_with_args/4");
|
|
return(FALSE);
|
|
}
|
|
if (IsAtomTerm(t)) {
|
|
Atom a;
|
|
a = AtomOfTerm(t);
|
|
ARG1 = ARG2;
|
|
ARG2 = ARG3;
|
|
ARG3 = ARG4;
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,3),mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
Int Arity, i;
|
|
Atom a;
|
|
CELL *ptr;
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/2");
|
|
return(FALSE);
|
|
}
|
|
Arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+3), mod);
|
|
XREGS[Arity+3] = ARG4;
|
|
XREGS[Arity+2] = ARG3;
|
|
XREGS[Arity+1] = ARG2;
|
|
ptr = RepAppl(t)+1;
|
|
for (i=1;i<=Arity;i++) {
|
|
XREGS[i] = *ptr++;
|
|
}
|
|
} else {
|
|
CELL *ptr;
|
|
|
|
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,5), mod);
|
|
ptr = RepPair(t);
|
|
XREGS[5] = ARG4;
|
|
XREGS[4] = ARG3;
|
|
XREGS[3] = ARG2;
|
|
XREGS[1] = ptr[0];
|
|
XREGS[2] = ptr[1];
|
|
}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
static Int
|
|
p_execute_4(void)
|
|
{ /* '$execute_4'(Goal) */
|
|
Term t = Deref(ARG1);
|
|
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG6));
|
|
Prop pe;
|
|
|
|
if (IsAtomTerm(t)) {
|
|
Atom a;
|
|
a = AtomOfTerm(t);
|
|
ARG1 = ARG2;
|
|
ARG2 = ARG3;
|
|
ARG3 = ARG4;
|
|
ARG4 = ARG5;
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,4),mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
Int Arity, i;
|
|
Atom a;
|
|
CELL *ptr;
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/5");
|
|
return(FALSE);
|
|
}
|
|
Arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+4), mod);
|
|
XREGS[Arity+4] = ARG5;
|
|
XREGS[Arity+3] = ARG4;
|
|
XREGS[Arity+2] = ARG3;
|
|
XREGS[Arity+1] = ARG2;
|
|
ptr = RepAppl(t)+1;
|
|
for (i=1;i<=Arity;i++) {
|
|
XREGS[i] = *ptr++;
|
|
}
|
|
} else {
|
|
CELL *ptr;
|
|
|
|
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,6), mod);
|
|
ptr = RepPair(t);
|
|
XREGS[6] = ARG5;
|
|
XREGS[5] = ARG4;
|
|
XREGS[4] = ARG3;
|
|
XREGS[3] = ARG2;
|
|
XREGS[1] = ptr[0];
|
|
XREGS[2] = ptr[1];
|
|
}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
static Int
|
|
p_execute_5(void)
|
|
{ /* '$execute_5'(Goal) */
|
|
Term t = Deref(ARG1);
|
|
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG7));
|
|
Prop pe;
|
|
|
|
if (IsAtomTerm(t)) {
|
|
Atom a;
|
|
a = AtomOfTerm(t);
|
|
ARG1 = ARG2;
|
|
ARG2 = ARG3;
|
|
ARG3 = ARG4;
|
|
ARG4 = ARG5;
|
|
ARG5 = ARG6;
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,5),mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
Int Arity, i;
|
|
Atom a;
|
|
CELL *ptr;
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/6");
|
|
return(FALSE);
|
|
}
|
|
Arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+5), mod);
|
|
XREGS[Arity+5] = ARG6;
|
|
XREGS[Arity+4] = ARG5;
|
|
XREGS[Arity+3] = ARG4;
|
|
XREGS[Arity+2] = ARG3;
|
|
XREGS[Arity+1] = ARG2;
|
|
ptr = RepAppl(t)+1;
|
|
for (i=1;i<=Arity;i++) {
|
|
XREGS[i] = *ptr++;
|
|
}
|
|
} else {
|
|
CELL *ptr;
|
|
|
|
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,7), mod);
|
|
ptr = RepPair(t);
|
|
XREGS[7] = ARG6;
|
|
XREGS[6] = ARG5;
|
|
XREGS[5] = ARG4;
|
|
XREGS[4] = ARG3;
|
|
XREGS[3] = ARG2;
|
|
XREGS[1] = ptr[0];
|
|
XREGS[2] = ptr[1];
|
|
}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
static Int
|
|
p_execute_6(void)
|
|
{ /* '$execute_6'(Goal) */
|
|
Term t = Deref(ARG1);
|
|
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG8));
|
|
Prop pe;
|
|
|
|
if (IsAtomTerm(t)) {
|
|
Atom a;
|
|
a = AtomOfTerm(t);
|
|
ARG1 = ARG2;
|
|
ARG2 = ARG3;
|
|
ARG3 = ARG4;
|
|
ARG4 = ARG5;
|
|
ARG5 = ARG6;
|
|
ARG6 = ARG7;
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,6),mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
Int Arity, i;
|
|
Atom a;
|
|
CELL *ptr;
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/7");
|
|
return(FALSE);
|
|
}
|
|
Arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+6), mod);
|
|
XREGS[Arity+6] = ARG7;
|
|
XREGS[Arity+5] = ARG6;
|
|
XREGS[Arity+4] = ARG5;
|
|
XREGS[Arity+3] = ARG4;
|
|
XREGS[Arity+2] = ARG3;
|
|
XREGS[Arity+1] = ARG2;
|
|
ptr = RepAppl(t)+1;
|
|
for (i=1;i<=Arity;i++) {
|
|
XREGS[i] = *ptr++;
|
|
}
|
|
} else {
|
|
CELL *ptr;
|
|
|
|
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,8), mod);
|
|
ptr = RepPair(t);
|
|
XREGS[8] = ARG7;
|
|
XREGS[7] = ARG6;
|
|
XREGS[6] = ARG5;
|
|
XREGS[5] = ARG4;
|
|
XREGS[4] = ARG3;
|
|
XREGS[3] = ARG2;
|
|
XREGS[1] = ptr[0];
|
|
XREGS[2] = ptr[1];
|
|
}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
static Int
|
|
p_execute_7(void)
|
|
{ /* '$execute_7'(Goal) */
|
|
Term t = Deref(ARG1);
|
|
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG9));
|
|
Prop pe;
|
|
|
|
if (IsAtomTerm(t)) {
|
|
Atom a;
|
|
a = AtomOfTerm(t);
|
|
ARG1 = ARG2;
|
|
ARG2 = ARG3;
|
|
ARG3 = ARG4;
|
|
ARG4 = ARG5;
|
|
ARG5 = ARG6;
|
|
ARG6 = ARG7;
|
|
ARG7 = ARG8;
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,7),mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
Int Arity, i;
|
|
Atom a;
|
|
CELL *ptr;
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/8");
|
|
return(FALSE);
|
|
}
|
|
Arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+7), mod);
|
|
XREGS[Arity+7] = ARG8;
|
|
XREGS[Arity+6] = ARG7;
|
|
XREGS[Arity+5] = ARG6;
|
|
XREGS[Arity+4] = ARG5;
|
|
XREGS[Arity+3] = ARG4;
|
|
XREGS[Arity+2] = ARG3;
|
|
XREGS[Arity+1] = ARG2;
|
|
ptr = RepAppl(t)+1;
|
|
for (i=1;i<=Arity;i++) {
|
|
XREGS[i] = *ptr++;
|
|
}
|
|
} else {
|
|
CELL *ptr;
|
|
|
|
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,9), mod);
|
|
ptr = RepPair(t);
|
|
XREGS[9] = ARG8;
|
|
XREGS[8] = ARG7;
|
|
XREGS[7] = ARG6;
|
|
XREGS[6] = ARG5;
|
|
XREGS[5] = ARG4;
|
|
XREGS[4] = ARG3;
|
|
XREGS[3] = ARG2;
|
|
XREGS[1] = ptr[0];
|
|
XREGS[2] = ptr[1];
|
|
}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
static Int
|
|
p_execute_8(void)
|
|
{ /* '$execute_8'(Goal) */
|
|
Term t = Deref(ARG1);
|
|
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG10));
|
|
Prop pe;
|
|
|
|
if (IsAtomTerm(t)) {
|
|
Atom a;
|
|
a = AtomOfTerm(t);
|
|
ARG1 = ARG2;
|
|
ARG2 = ARG3;
|
|
ARG3 = ARG4;
|
|
ARG4 = ARG5;
|
|
ARG5 = ARG6;
|
|
ARG6 = ARG7;
|
|
ARG7 = ARG8;
|
|
ARG8 = ARG9;
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,8),mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
Int Arity, i;
|
|
Atom a;
|
|
CELL *ptr;
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/9");
|
|
return(FALSE);
|
|
}
|
|
Arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+8), mod);
|
|
XREGS[Arity+8] = ARG9;
|
|
XREGS[Arity+7] = ARG8;
|
|
XREGS[Arity+6] = ARG7;
|
|
XREGS[Arity+5] = ARG6;
|
|
XREGS[Arity+4] = ARG5;
|
|
XREGS[Arity+3] = ARG4;
|
|
XREGS[Arity+2] = ARG3;
|
|
XREGS[Arity+1] = ARG2;
|
|
ptr = RepAppl(t)+1;
|
|
for (i=1;i<=Arity;i++) {
|
|
XREGS[i] = *ptr++;
|
|
}
|
|
} else {
|
|
CELL *ptr;
|
|
|
|
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,10), mod);
|
|
ptr = RepPair(t);
|
|
XREGS[10] = ARG9;
|
|
XREGS[9] = ARG8;
|
|
XREGS[8] = ARG7;
|
|
XREGS[7] = ARG6;
|
|
XREGS[6] = ARG5;
|
|
XREGS[5] = ARG4;
|
|
XREGS[4] = ARG3;
|
|
XREGS[3] = ARG2;
|
|
XREGS[1] = ptr[0];
|
|
XREGS[2] = ptr[1];
|
|
}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
static Int
|
|
p_execute_9(void)
|
|
{ /* '$execute_9'(Goal) */
|
|
Term t = Deref(ARG1);
|
|
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG11));
|
|
Prop pe;
|
|
|
|
if (IsAtomTerm(t)) {
|
|
Atom a;
|
|
a = AtomOfTerm(t);
|
|
ARG1 = ARG2;
|
|
ARG2 = ARG3;
|
|
ARG3 = ARG4;
|
|
ARG4 = ARG5;
|
|
ARG5 = ARG6;
|
|
ARG6 = ARG7;
|
|
ARG7 = ARG8;
|
|
ARG8 = ARG9;
|
|
ARG9 = ARG10;
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,9),mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
Int Arity, i;
|
|
Atom a;
|
|
CELL *ptr;
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/10");
|
|
return(FALSE);
|
|
}
|
|
Arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+9), mod);
|
|
XREGS[Arity+9] = ARG10;
|
|
XREGS[Arity+8] = ARG9;
|
|
XREGS[Arity+7] = ARG8;
|
|
XREGS[Arity+6] = ARG7;
|
|
XREGS[Arity+5] = ARG6;
|
|
XREGS[Arity+4] = ARG5;
|
|
XREGS[Arity+3] = ARG4;
|
|
XREGS[Arity+2] = ARG3;
|
|
XREGS[Arity+1] = ARG2;
|
|
ptr = RepAppl(t)+1;
|
|
for (i=1;i<=Arity;i++) {
|
|
XREGS[i] = *ptr++;
|
|
}
|
|
} else {
|
|
CELL *ptr;
|
|
|
|
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,11), mod);
|
|
ptr = RepPair(t);
|
|
XREGS[11] = ARG10;
|
|
XREGS[10] = ARG9;
|
|
XREGS[9] = ARG8;
|
|
XREGS[8] = ARG7;
|
|
XREGS[7] = ARG6;
|
|
XREGS[6] = ARG5;
|
|
XREGS[5] = ARG4;
|
|
XREGS[4] = ARG3;
|
|
XREGS[3] = ARG2;
|
|
XREGS[1] = ptr[0];
|
|
XREGS[2] = ptr[1];
|
|
}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
static Int
|
|
p_execute_10(void)
|
|
{ /* '$execute_10'(Goal) */
|
|
Term t = Deref(ARG1);
|
|
SMALLUNSGN mod = Yap_LookupModule(Deref(ARG12));
|
|
Prop pe;
|
|
|
|
if (IsAtomTerm(t)) {
|
|
Atom a;
|
|
a = AtomOfTerm(t);
|
|
ARG1 = ARG2;
|
|
ARG2 = ARG3;
|
|
ARG3 = ARG4;
|
|
ARG4 = ARG5;
|
|
ARG5 = ARG6;
|
|
ARG6 = ARG7;
|
|
ARG7 = ARG8;
|
|
ARG8 = ARG9;
|
|
ARG9 = ARG10;
|
|
ARG10 = ARG11;
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,10),mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
Int Arity, i;
|
|
Atom a;
|
|
CELL *ptr;
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/11");
|
|
return(FALSE);
|
|
}
|
|
Arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+10), mod);
|
|
XREGS[Arity+10] = ARG11;
|
|
XREGS[Arity+9] = ARG10;
|
|
XREGS[Arity+8] = ARG9;
|
|
XREGS[Arity+7] = ARG8;
|
|
XREGS[Arity+6] = ARG7;
|
|
XREGS[Arity+5] = ARG6;
|
|
XREGS[Arity+4] = ARG5;
|
|
XREGS[Arity+3] = ARG4;
|
|
XREGS[Arity+2] = ARG3;
|
|
XREGS[Arity+1] = ARG2;
|
|
ptr = RepAppl(t)+1;
|
|
for (i=1;i<=Arity;i++) {
|
|
XREGS[i] = *ptr++;
|
|
}
|
|
} else {
|
|
CELL *ptr;
|
|
|
|
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,12), mod);
|
|
ptr = RepPair(t);
|
|
XREGS[12] = ARG11;
|
|
XREGS[11] = ARG10;
|
|
XREGS[10] = ARG9;
|
|
XREGS[9] = ARG8;
|
|
XREGS[8] = ARG7;
|
|
XREGS[7] = ARG6;
|
|
XREGS[6] = ARG5;
|
|
XREGS[5] = ARG4;
|
|
XREGS[4] = ARG3;
|
|
XREGS[3] = ARG2;
|
|
XREGS[1] = ptr[0];
|
|
XREGS[2] = ptr[1];
|
|
}
|
|
return (CallPredicate(RepPredProp(pe), B));
|
|
}
|
|
|
|
#ifdef DEPTH_LIMIT
|
|
static Int
|
|
p_execute_depth_limit(void) {
|
|
Term d = Deref(ARG2);
|
|
if (IsVarTerm(d)) {
|
|
Yap_Error(INSTANTIATION_ERROR,d,"depth_bound_call/2");
|
|
} else if (!IsIntTerm(d)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER, d, "depth_bound_call/2");
|
|
return(FALSE);
|
|
}
|
|
DEPTH = MkIntTerm(IntOfTerm(d)*2);
|
|
return(p_execute());
|
|
}
|
|
#endif
|
|
|
|
static Int
|
|
p_pred_goal_expansion_on(void) {
|
|
/* a goal needs expansion if we have goal_expansion defined or
|
|
if the goal is a meta-call */
|
|
return PRED_GOAL_EXPANSION_ON;
|
|
}
|
|
|
|
static Int
|
|
p_at_execute(void)
|
|
{ /* '$execute'(Goal,ClauseNumber) */
|
|
Term t = Deref(ARG1), tmod = Deref(ARG2), t2 = Deref(ARG3);
|
|
unsigned int arity;
|
|
Prop pe;
|
|
Atom a;
|
|
SMALLUNSGN mod = Yap_LookupModule(tmod);
|
|
|
|
restart_exec:
|
|
if (IsAtomTerm(t)) {
|
|
a = AtomOfTerm(t);
|
|
pe = PredPropByAtom(a, mod);
|
|
arity = 0;
|
|
} else if (IsApplTerm(t)) {
|
|
register Functor f = FunctorOfTerm(t);
|
|
register unsigned int i;
|
|
register CELL *pt;
|
|
|
|
if (IsBlobFunctor(f))
|
|
return(FALSE);
|
|
if (f == FunctorModule) {
|
|
Term tmod = ArgOfTerm(1,t);
|
|
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
|
|
mod = Yap_LookupModule(tmod);
|
|
t = ArgOfTerm(2,t);
|
|
goto restart_exec;
|
|
}
|
|
if (IsVarTerm(tmod)) {
|
|
Yap_Error(INSTANTIATION_ERROR, ARG1, "calling clause in debugger");
|
|
}
|
|
Yap_Error(TYPE_ERROR_ATOM, ARG1, "calling clause in debugger");
|
|
}
|
|
pe = PredPropByFunc(f,mod);
|
|
arity = ArityOfFunctor(f);
|
|
a = NameOfFunctor(f);
|
|
/* I cannot use the standard macro here because
|
|
otherwise I would dereference the argument and
|
|
might skip a svar */
|
|
pt = RepAppl(t)+1;
|
|
for (i = 1; i <= arity; ++i)
|
|
#if SBA
|
|
{
|
|
Term d0 = *pt++;
|
|
if (d0 == 0)
|
|
XREGS[i] = (CELL)(pt-1);
|
|
else
|
|
XREGS[i] = d0;
|
|
}
|
|
#else
|
|
XREGS[i] = *pt++;
|
|
#endif
|
|
} else
|
|
return (FALSE); /* for the moment */
|
|
if (IsVarTerm(t2) || !IsIntTerm(t2))
|
|
return (FALSE);
|
|
/* N = arity; */
|
|
/* call may not define new system predicates!! */
|
|
return (CallClause(RepPredProp(pe), IntOfTerm(t2)));
|
|
}
|
|
|
|
static int
|
|
exec_absmi(int top)
|
|
{
|
|
int lval;
|
|
if (top && (lval = sigsetjmp (Yap_RestartEnv, 1)) != 0) {
|
|
switch(lval) {
|
|
case 1:
|
|
{ /* restart */
|
|
/* otherwise, SetDBForThrow will fail entering critical mode */
|
|
Yap_PrologMode = UserMode;
|
|
/* find out where to cut to */
|
|
#if defined(__GNUC__)
|
|
#if defined(hppa) || defined(__alpha)
|
|
/* siglongjmp resets the TR hardware register */
|
|
restore_TR();
|
|
#endif
|
|
#if defined(__alpha)
|
|
/* siglongjmp resets the H hardware register */
|
|
restore_H();
|
|
#endif
|
|
#endif
|
|
yap_flags[SPY_CREEP_FLAG] = 0;
|
|
LOCK(SignalLock);
|
|
CreepFlag = CalculateStackGap();
|
|
Yap_PrologMode = UserMode;
|
|
UNLOCK(SignalLock);
|
|
P = (yamop *)FAILCODE;
|
|
}
|
|
break;
|
|
case 2:
|
|
{
|
|
/* arithmetic exception */
|
|
/* must be done here, otherwise siglongjmp will clobber all the registers */
|
|
Yap_Error(Yap_matherror,TermNil,NULL);
|
|
/* reset the registers so that we don't have trash in abstract machine */
|
|
Yap_set_fpu_exceptions(yap_flags[LANGUAGE_MODE_FLAG] == 1);
|
|
P = (yamop *)FAILCODE;
|
|
Yap_PrologMode = UserMode;
|
|
}
|
|
break;
|
|
case 3:
|
|
{ /* saved state */
|
|
return(FALSE);
|
|
}
|
|
default:
|
|
/* do nothing */
|
|
Yap_PrologMode = UserMode;
|
|
}
|
|
} else {
|
|
Yap_PrologMode = UserMode;
|
|
}
|
|
return(Yap_absmi(0));
|
|
}
|
|
|
|
static int
|
|
do_goal(yamop *CodeAdr, int arity, CELL *pt, int top)
|
|
{
|
|
choiceptr saved_b = B;
|
|
|
|
/* create an initial pseudo environment so that when garbage
|
|
collection is going up in the environment chain it doesn't get
|
|
confused */
|
|
EX = 0L;
|
|
YENV = ASP;
|
|
YENV[E_CP] = (CELL)P;
|
|
YENV[E_CB] = (CELL)B;
|
|
YENV[E_E] = (CELL)ENV;
|
|
#ifdef DEPTH_LIMIT
|
|
YENV[E_DEPTH] = DEPTH;
|
|
#endif
|
|
ENV = YENV;
|
|
ASP -= EnvSizeInCells;
|
|
/* and now create a pseudo choicepoint for much the same reasons */
|
|
/* CP = YESCODE; */
|
|
/* keep a place where you can inform you had an exception */
|
|
{
|
|
int i;
|
|
for (i = 0; i < arity; i++) {
|
|
XREGS[i+1] = *pt++;
|
|
}
|
|
}
|
|
B = (choiceptr)ASP;
|
|
B--;
|
|
#ifdef TABLING
|
|
if (top) {
|
|
DepFr_cons_cp(GLOBAL_root_dep_fr) = B;
|
|
}
|
|
#endif /* TABLING */
|
|
B->cp_h = H;
|
|
B->cp_tr = TR;
|
|
B->cp_cp = CP;
|
|
B->cp_ap = NOCODE;
|
|
B->cp_env = ENV;
|
|
B->cp_b = saved_b;
|
|
#ifdef DEPTH_LIMIT
|
|
B->cp_depth = DEPTH;
|
|
#endif /* DEPTH_LIMIT */
|
|
YENV = ASP = (CELL *)B;
|
|
HB = H;
|
|
YENV[E_CB] = Unsigned (B);
|
|
P = (yamop *) CodeAdr;
|
|
CP = YESCODE;
|
|
S = CellPtr (RepPredProp (PredPropByFunc (Yap_MkFunctor(AtomCall, 1),0))); /* A1 mishaps */
|
|
|
|
return(exec_absmi(top));
|
|
}
|
|
|
|
int
|
|
Yap_exec_absmi(int top)
|
|
{
|
|
return exec_absmi(top);
|
|
}
|
|
|
|
|
|
Int
|
|
Yap_execute_goal(Term t, int nargs, SMALLUNSGN mod)
|
|
{
|
|
Int out;
|
|
yamop *CodeAdr;
|
|
yamop *saved_p, *saved_cp;
|
|
Prop pe;
|
|
PredEntry *ppe;
|
|
CELL *pt;
|
|
/* preserve the current restart environment */
|
|
/* visualc*/
|
|
/* just keep the difference because of possible garbage collections */
|
|
|
|
|
|
saved_p = P;
|
|
saved_cp = CP;
|
|
|
|
if (IsAtomTerm(t)) {
|
|
Atom a = AtomOfTerm(t);
|
|
pt = NULL;
|
|
pe = PredPropByAtom(a, mod);
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
|
|
if (IsBlobFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE,t,"call/1");
|
|
return(FALSE);
|
|
}
|
|
/* I cannot use the standard macro here because
|
|
otherwise I would dereference the argument and
|
|
might skip a svar */
|
|
pt = RepAppl(t)+1;
|
|
pe = PredPropByFunc(f, mod);
|
|
} else {
|
|
Yap_Error(TYPE_ERROR_CALLABLE,t,"call/1");
|
|
return(FALSE);
|
|
}
|
|
ppe = RepPredProp(pe);
|
|
if (pe == NIL) {
|
|
return(CallMetaCall(mod));
|
|
}
|
|
READ_LOCK(ppe->PRWLock);
|
|
if (IsAtomTerm(t)) {
|
|
CodeAdr = RepPredProp (pe)->CodeOfPred;
|
|
READ_UNLOCK(ppe->PRWLock);
|
|
out = do_goal(CodeAdr, 0, pt, FALSE);
|
|
} else {
|
|
Functor f = FunctorOfTerm(t);
|
|
CodeAdr = RepPredProp (pe)->CodeOfPred;
|
|
READ_UNLOCK(ppe->PRWLock);
|
|
out = do_goal(CodeAdr, ArityOfFunctor(f), pt, FALSE);
|
|
}
|
|
|
|
if (out == 1) {
|
|
choiceptr old_B;
|
|
/* we succeeded, let's prune */
|
|
/* restore the old environment */
|
|
/* get to previous environment */
|
|
#ifdef YAPOR
|
|
CUT_prune_to((choiceptr)(ENV[E_CB]));
|
|
#else
|
|
B = (choiceptr)(ENV[E_CB]);
|
|
#endif /* YAPOR */
|
|
#ifdef TABLING
|
|
abolish_incomplete_subgoals(B);
|
|
#endif /* TABLING */
|
|
/* find out where we have the old arguments */
|
|
old_B = ((choiceptr)(ENV-(EnvSizeInCells+nargs+1)))-1;
|
|
CP = saved_cp;
|
|
P = saved_p;
|
|
ASP = ENV;
|
|
*--ASP = MkIntTerm(0);
|
|
#ifdef DEPTH_LIMIT
|
|
DEPTH= ENV[E_DEPTH];
|
|
#endif
|
|
ENV = (CELL *)(ENV[E_E]);
|
|
/* we have failed, and usually we would backtrack to this B,
|
|
trouble is, we may also have a delayed cut to do */
|
|
if (B != NULL)
|
|
HB = B->cp_h;
|
|
YENV = ENV;
|
|
return(TRUE);
|
|
} else if (out == 0) {
|
|
ASP = B->cp_env;
|
|
P = saved_p;
|
|
CP = saved_cp;
|
|
H = B->cp_h;
|
|
#ifdef DEPTH_LIMIT
|
|
DEPTH= B->cp_depth;
|
|
#endif
|
|
/* ASP should be set to the top of the local stack when we
|
|
did the call */
|
|
ASP = B->cp_env;
|
|
/* YENV should be set to the current environment */
|
|
YENV = ENV = (CELL *)((B->cp_env)[E_E]);
|
|
B = B->cp_b;
|
|
SET_BB(B);
|
|
HB = PROTECT_FROZEN_H(B);
|
|
return(FALSE);
|
|
} else {
|
|
Yap_Error(SYSTEM_ERROR,TermNil,"emulator crashed");
|
|
return(FALSE);
|
|
}
|
|
}
|
|
|
|
void
|
|
Yap_trust_last(void)
|
|
{
|
|
ASP = B->cp_env;
|
|
P = (yamop *)(B->cp_env[E_CP]);
|
|
CP = B->cp_cp;
|
|
H = B->cp_h;
|
|
#ifdef DEPTH_LIMIT
|
|
DEPTH= B->cp_depth;
|
|
#endif
|
|
YENV= ASP = B->cp_env;
|
|
ENV = (CELL *)((B->cp_env)[E_E]);
|
|
B = B->cp_b;
|
|
if (B) {
|
|
SET_BB(B);
|
|
HB = PROTECT_FROZEN_H(B);
|
|
}
|
|
}
|
|
|
|
int
|
|
Yap_RunTopGoal(Term t)
|
|
{
|
|
yamop *CodeAdr;
|
|
Prop pe;
|
|
PredEntry *ppe;
|
|
CELL *pt;
|
|
UInt arity;
|
|
SMALLUNSGN mod = CurrentModule;
|
|
int goal_out = 0;
|
|
|
|
restart_runtopgoal:
|
|
if (IsAtomTerm(t)) {
|
|
Atom a = AtomOfTerm(t);
|
|
pt = NULL;
|
|
pe = PredPropByAtom(a, CurrentModule);
|
|
arity = 0;
|
|
} else if (IsApplTerm(t)) {
|
|
Functor f = FunctorOfTerm(t);
|
|
|
|
if (IsBlobFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE,t,"call/1");
|
|
return(FALSE);
|
|
}
|
|
if (f == FunctorModule) {
|
|
Term tmod = ArgOfTerm(1,t);
|
|
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
|
|
mod = Yap_LookupModule(tmod);
|
|
t = ArgOfTerm(2,t);
|
|
goto restart_runtopgoal;
|
|
}
|
|
}
|
|
/* I cannot use the standard macro here because
|
|
otherwise I would dereference the argument and
|
|
might skip a svar */
|
|
pe = Yap_GetPredPropByFunc(f, CurrentModule);
|
|
pt = RepAppl(t)+1;
|
|
arity = ArityOfFunctor(f);
|
|
} else {
|
|
Yap_Error(TYPE_ERROR_CALLABLE,t,"call/1");
|
|
return(FALSE);
|
|
}
|
|
ppe = RepPredProp(pe);
|
|
if (pe != NIL) {
|
|
READ_LOCK(ppe->PRWLock);
|
|
}
|
|
if (pe == NIL) {
|
|
/* we must always start the emulator with Prolog code */
|
|
return(FALSE);
|
|
}
|
|
if (pe != NIL) {
|
|
READ_UNLOCK(ppe->PRWLock);
|
|
}
|
|
CodeAdr = ppe->CodeOfPred;
|
|
if (Yap_TrailTop - HeapTop < 2048) {
|
|
Yap_PrologMode = BootMode;
|
|
Yap_Error(SYSTEM_ERROR,TermNil,
|
|
"unable to boot because of too little heap space");
|
|
}
|
|
goal_out = do_goal(CodeAdr, arity, pt, TRUE);
|
|
return(goal_out);
|
|
}
|
|
|
|
static void
|
|
restore_regs(Term t)
|
|
{
|
|
if (IsApplTerm(t)) {
|
|
Int i;
|
|
Int max = ArityOfFunctor(FunctorOfTerm(t));
|
|
CELL *ptr = RepAppl(t)+1;
|
|
|
|
for (i = 0; i < max; i += 2) {
|
|
Int j = IntOfTerm(ptr[0]);
|
|
XREGS[j] = ptr[1];
|
|
ptr+=2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* low level voodoo to restore temporary registers after a call */
|
|
static Int
|
|
p_restore_regs(void)
|
|
{
|
|
Term t = Deref(ARG1);
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"support for coroutining");
|
|
return(FALSE);
|
|
}
|
|
if (IsAtomTerm(t)) return(TRUE);
|
|
restore_regs(t);
|
|
return(TRUE);
|
|
}
|
|
|
|
/* low level voodoo to cut and then restore temporary registers after a call */
|
|
static Int
|
|
p_restore_regs2(void)
|
|
{
|
|
|
|
Term t = Deref(ARG1), d0;
|
|
choiceptr pt0;
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"support for coroutining");
|
|
return(FALSE);
|
|
}
|
|
d0 = Deref(ARG2);
|
|
if (!IsAtomTerm(t)) {
|
|
restore_regs(t);
|
|
}
|
|
if (IsVarTerm(d0)) {
|
|
Yap_Error(INSTANTIATION_ERROR,d0,"support for coroutining");
|
|
return(FALSE);
|
|
}
|
|
if (!IsIntegerTerm(d0)) {
|
|
return(FALSE);
|
|
}
|
|
#if SBA
|
|
pt0 = (choiceptr)IntegerOfTerm(d0);
|
|
#else
|
|
pt0 = (choiceptr)(LCL0-IntOfTerm(d0));
|
|
#endif
|
|
/* find where to cut to */
|
|
if (pt0 > B) {
|
|
/* Wow, we're gonna cut!!! */
|
|
#ifdef YAPOR
|
|
CUT_prune_to(pt0);
|
|
#else
|
|
B = pt0;
|
|
#endif /* YAPOR */
|
|
#ifdef TABLING
|
|
abolish_incomplete_subgoals(B);
|
|
#endif /* TABLING */
|
|
HB = B->cp_h;
|
|
/* trim_trail();*/
|
|
}
|
|
return(TRUE);
|
|
}
|
|
|
|
static Int
|
|
p_clean_ifcp(void) {
|
|
#if SBA
|
|
choiceptr pt0 = (choiceptr)IntegerOfTerm(Deref(ARG1));
|
|
#else
|
|
choiceptr pt0 = (choiceptr)(LCL0-IntOfTerm(Deref(ARG1)));
|
|
#endif
|
|
if (pt0 == B) {
|
|
B = B->cp_b;
|
|
HB = B->cp_h;
|
|
} else {
|
|
pt0->cp_ap = (yamop *)TRUSTFAILCODE;
|
|
}
|
|
return(TRUE);
|
|
}
|
|
|
|
|
|
static Int
|
|
JumpToEnv(Term t) {
|
|
yamop *pos = NEXTOP(PredDollarCatch->cs.p_code.TrueCodeOfPred,ld),
|
|
*catchpos = NEXTOP(PredHandleThrow->cs.p_code.TrueCodeOfPred,ld);
|
|
CELL *env;
|
|
choiceptr first_func = NULL, B0 = B;
|
|
|
|
do {
|
|
/* find the first choicepoint that may be a catch */
|
|
while (B != NULL && B->cp_ap != pos) {
|
|
/* we are already doing a catch */
|
|
if (B->cp_ap == catchpos) {
|
|
P = (yamop *)FAILCODE;
|
|
if (first_func != NULL) {
|
|
B = first_func;
|
|
}
|
|
return(FALSE);
|
|
}
|
|
if (B->cp_ap == NOCODE) {
|
|
/* up to the C-code to deal with this! */
|
|
B->cp_h = H;
|
|
EX = t;
|
|
return(FALSE);
|
|
}
|
|
B = B->cp_b;
|
|
}
|
|
/* uncaught throw */
|
|
if (B == NULL) {
|
|
B = B0;
|
|
#if PUSH_REGS
|
|
restore_absmi_regs(&Yap_standard_regs);
|
|
#endif
|
|
siglongjmp(Yap_RestartEnv,1);
|
|
}
|
|
/* is it a continuation? */
|
|
env = B->cp_env;
|
|
while (env > ENV)
|
|
ENV = (CELL *)ENV[E_E];
|
|
/* yes, we found it ! */
|
|
if (env == ENV) break;
|
|
/* oops, try next */
|
|
B = B->cp_b;
|
|
} while (TRUE);
|
|
/* step one environment above */
|
|
B->cp_cp = (yamop *)env[E_CP];
|
|
B->cp_ap = NEXTOP(PredHandleThrow->CodeOfPred,ld);
|
|
B->cp_env = (CELL *)env[E_E];
|
|
/* cannot recover Heap because of copy term :-( */
|
|
B->cp_h = H;
|
|
/* I could backtrack here, but it is easier to leave the unwinding
|
|
to the emulator */
|
|
B->cp_a3 = t;
|
|
P = (yamop *)FAILCODE;
|
|
if (first_func != NULL) {
|
|
B = first_func;
|
|
}
|
|
#ifdef TABLING
|
|
abolish_incomplete_subgoals(B);
|
|
#endif /* TABLING */
|
|
return(FALSE);
|
|
}
|
|
|
|
Int
|
|
Yap_JumpToEnv(Term t) {
|
|
return JumpToEnv(t);
|
|
}
|
|
|
|
|
|
/* This does very nasty stuff!!!!! */
|
|
static Int
|
|
p_jump_env(void) {
|
|
return(JumpToEnv(Deref(ARG1)));
|
|
}
|
|
|
|
/* set up a meta-call based on . context info */
|
|
static Int
|
|
p_generate_pred_info(void) {
|
|
ARG1 = ARG3 = ENV[-EnvSizeInCells-1];
|
|
ARG4 = ModuleName[IntOfTerm(ENV[-EnvSizeInCells-3])];
|
|
ARG2 = cp_as_integer((choiceptr)ENV[E_CB]);
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
Yap_InitYaamRegs(void)
|
|
{
|
|
|
|
#if PUSH_REGS
|
|
/* Guarantee that after a longjmp we go back to the original abstract
|
|
machine registers */
|
|
#ifdef THREADS
|
|
int myworker_id = worker_id;
|
|
pthread_setspecific(Yap_yaamregs_key, (const void *)ThreadHandle[myworker_id].default_yaam_regs);
|
|
ThreadHandle[myworker_id].current_yaam_regs = ThreadHandle[myworker_id].default_yaam_regs;
|
|
worker_id = myworker_id;
|
|
#else
|
|
Yap_regp = &Yap_standard_regs;
|
|
#endif
|
|
#endif /* PUSH_REGS */
|
|
Yap_PutValue (AtomBreak, MkIntTerm (0));
|
|
TR = (tr_fr_ptr)Yap_TrailBase;
|
|
#ifdef COROUTINING
|
|
H = H0 = ((CELL *) Yap_GlobalBase)+ 2048;
|
|
#else
|
|
H = H0 = (CELL *) Yap_GlobalBase;
|
|
#endif
|
|
LCL0 = ASP = (CELL *) Yap_LocalBase;
|
|
/* notice that an initial choice-point and environment
|
|
*must* be created since for the garbage collector to work */
|
|
B = NULL;
|
|
ENV = NULL;
|
|
P = CP = YESCODE;
|
|
#ifdef DEPTH_LIMIT
|
|
DEPTH = RESET_DEPTH();
|
|
#endif
|
|
STATIC_PREDICATES_MARKED = FALSE;
|
|
#ifdef FROZEN_STACKS
|
|
H = HB = H0 = H_FZ = H_BASE;
|
|
#ifdef SBA
|
|
BSEG =
|
|
#endif /* SBA */
|
|
BBREG = B_FZ = B_BASE;
|
|
TR = TR_FZ = TR_BASE;
|
|
#endif /* FROZEN_STACKS */
|
|
LOCK(SignalLock);
|
|
CreepFlag = CalculateStackGap();
|
|
UNLOCK(SignalLock);
|
|
EX = 0L;
|
|
/* for slots to work */
|
|
*--ASP = MkIntTerm(0);
|
|
#if COROUTINING
|
|
RESET_VARIABLE((CELL *)Yap_GlobalBase);
|
|
DelayedVars = Yap_NewTimedVar((CELL)Yap_GlobalBase);
|
|
WokenGoals = Yap_NewTimedVar(TermNil);
|
|
MutableList = Yap_NewTimedVar(TermNil);
|
|
AttsMutableList = Yap_NewTimedVar(TermNil);
|
|
#endif
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
PP = NULL;
|
|
WPP = NULL;
|
|
PREG_ADDR = NULL;
|
|
#endif
|
|
}
|
|
|
|
|
|
void
|
|
Yap_InitExecFs(void)
|
|
{
|
|
Yap_InitComma();
|
|
Yap_InitCPred("$execute", 1, p_execute, 0);
|
|
Yap_InitCPred("$execute_in_mod", 2, p_execute_in_mod, 0);
|
|
Yap_InitCPred("$execute", 3, p_at_execute, 0);
|
|
Yap_InitCPred("$call_with_args", 2, p_execute_0, 0);
|
|
Yap_InitCPred("$call_with_args", 3, p_execute_1, 0);
|
|
Yap_InitCPred("$call_with_args", 4, p_execute_2, 0);
|
|
Yap_InitCPred("$call_with_args", 5, p_execute_3, 0);
|
|
Yap_InitCPred("$call_with_args", 6, p_execute_4, 0);
|
|
Yap_InitCPred("$call_with_args", 7, p_execute_5, 0);
|
|
Yap_InitCPred("$call_with_args", 8, p_execute_6, 0);
|
|
Yap_InitCPred("$call_with_args", 9, p_execute_7, 0);
|
|
Yap_InitCPred("$call_with_args", 10, p_execute_8, 0);
|
|
Yap_InitCPred("$call_with_args", 11, p_execute_9, 0);
|
|
Yap_InitCPred("$call_with_args", 12, p_execute_10, 0);
|
|
#ifdef DEPTH_LIMIT
|
|
Yap_InitCPred("$execute_under_depth_limit", 2, p_execute_depth_limit, 0);
|
|
#endif
|
|
Yap_InitCPred("$execute0", 2, p_execute0, 0);
|
|
Yap_InitCPred("$save_current_choice_point", 1, p_save_cp, 0);
|
|
Yap_InitCPred("$pred_goal_expansion_on", 0, p_pred_goal_expansion_on, SafePredFlag);
|
|
Yap_InitCPred("$restore_regs", 1, p_restore_regs, SafePredFlag);
|
|
Yap_InitCPred("$restore_regs", 2, p_restore_regs2, SafePredFlag);
|
|
Yap_InitCPred("$clean_ifcp", 1, p_clean_ifcp, SafePredFlag);
|
|
Yap_InitCPred("$jump_env_and_store_ball", 1, p_jump_env, 0);
|
|
Yap_InitCPred("$generate_pred_info", 4, p_generate_pred_info, 0);
|
|
}
|
|
|