478 lines
14 KiB
C
478 lines
14 KiB
C
/*************************************************************************
|
|
* *
|
|
* YAP Prolog %W% %G% *
|
|
* *
|
|
* Yap Prolog was developed at NCCUP - Universidade do Porto *
|
|
* *
|
|
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
|
|
* *
|
|
**************************************************************************
|
|
* *
|
|
* File: clause.h *
|
|
* Last rev: *
|
|
* mods: *
|
|
* comments: clause info *
|
|
* *
|
|
*************************************************************************/
|
|
|
|
#ifndef CLAUSE_H
|
|
#define CLAUSE_H 1
|
|
|
|
#include "Yatom.h"
|
|
#include "YapHeap.h"
|
|
|
|
/* consulting files */
|
|
|
|
typedef union CONSULT_OBJ {
|
|
Atom f_name;
|
|
int mode;
|
|
Prop p;
|
|
UInt c;
|
|
Term r;
|
|
} consult_obj;
|
|
|
|
/* Either we are assembling clauses or indexing code */
|
|
|
|
#define ASSEMBLING_CLAUSE 0
|
|
#define ASSEMBLING_INDEX 1
|
|
#define ASSEMBLING_EINDEX 2
|
|
|
|
#define NextDynamicClause(X) (((yamop *)X)->y_u.Otapl.d)
|
|
|
|
#define PredFirstClause 0
|
|
#define PredMiddleClause 1
|
|
#define PredLastClause 2
|
|
|
|
typedef struct logic_upd_index {
|
|
CELL ClFlags;
|
|
UInt ClRefCount;
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
/* A lock for manipulating the clause */
|
|
// lockvar ClLock;
|
|
#endif
|
|
UInt ClSize;
|
|
struct logic_upd_index *ParentIndex;
|
|
struct logic_upd_index *SiblingIndex;
|
|
struct logic_upd_index *PrevSiblingIndex;
|
|
struct logic_upd_index *ChildIndex;
|
|
/* The instructions, at least one of the form sl */
|
|
PredEntry *ClPred;
|
|
yamop ClCode[MIN_ARRAY];
|
|
} LogUpdIndex;
|
|
|
|
/* The ordering of the first 3 fields should be compatible with dbrefs */
|
|
typedef struct logic_upd_clause {
|
|
Functor Id; /* allow pointers to this struct to id */
|
|
/* as dbref */
|
|
/* A set of flags describing info on the clause */
|
|
/* A set of flags describing info on the clause */
|
|
CELL ClFlags;
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
/* A lock for manipulating the clause */
|
|
// lockvar ClLock;
|
|
#endif
|
|
UInt ClSize;
|
|
/* extra clause information for logical update indices and facts */
|
|
/* indices that may still backtrack to this clause */
|
|
UInt ClRefCount;
|
|
/* data for clauses with environments */
|
|
yamop *ClExt;
|
|
union {
|
|
DBTerm *ClSource;
|
|
Int ClLine;
|
|
} lusl;
|
|
/* doubly linked list of clauses */
|
|
struct logic_upd_clause *ClPrev, *ClNext;
|
|
/* parent pointer */
|
|
PredEntry *ClPred;
|
|
UInt ClTimeStart, ClTimeEnd;
|
|
/* The instructions, at least one of the form sl */
|
|
yamop ClCode[MIN_ARRAY];
|
|
} LogUpdClause;
|
|
|
|
#include "inline-only.h"
|
|
INLINE_ONLY int VALID_TIMESTAMP(UInt, struct logic_upd_clause *);
|
|
|
|
INLINE_ONLY int VALID_TIMESTAMP(UInt timestamp,
|
|
struct logic_upd_clause *cl) {
|
|
// printf("%lu %lu %lu\n",cl->ClTimeStart, timestamp, cl->ClTimeEnd);
|
|
return IN_BETWEEN(cl->ClTimeStart, timestamp, cl->ClTimeEnd);
|
|
}
|
|
|
|
typedef struct dynamic_clause {
|
|
/* A set of flags describing info on the clause */
|
|
CELL ClFlags;
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
/* A lock for manipulating the clause */
|
|
lockvar ClLock;
|
|
#endif
|
|
UInt ClSize;
|
|
Int ClLine;
|
|
UInt ClRefCount;
|
|
yamop *ClPrevious; /* immediate update clause */
|
|
/* The instructions, at least one of the form sl */
|
|
yamop ClCode[MIN_ARRAY];
|
|
} DynamicClause;
|
|
|
|
typedef struct static_index {
|
|
/* A set of flags describing info on the clause */
|
|
CELL ClFlags;
|
|
UInt ClSize;
|
|
struct static_index *SiblingIndex;
|
|
struct static_index *ChildIndex;
|
|
/* The instructions, at least one of the form sl */
|
|
PredEntry *ClPred;
|
|
yamop ClCode[MIN_ARRAY];
|
|
} StaticIndex;
|
|
|
|
typedef struct static_clause {
|
|
/* A set of flags describing info on the clause */
|
|
CELL ClFlags;
|
|
UInt ClSize;
|
|
union {
|
|
DBTerm *ClSource;
|
|
Int ClLine;
|
|
} usc;
|
|
struct static_clause *ClNext;
|
|
/* The instructions, at least one of the form sl */
|
|
yamop ClCode[MIN_ARRAY];
|
|
} StaticClause;
|
|
|
|
typedef struct static_mega_clause {
|
|
/* A set of flags describing info on the clause */
|
|
CELL ClFlags;
|
|
UInt ClSize;
|
|
PredEntry *ClPred;
|
|
UInt ClItemSize;
|
|
Int ClLine;
|
|
struct static_mega_clause *ClNext;
|
|
/* The instructions, at least one of the form sl */
|
|
yamop ClCode[MIN_ARRAY];
|
|
} MegaClause;
|
|
|
|
typedef union clause_obj {
|
|
struct logic_upd_clause luc;
|
|
struct logic_upd_index lui;
|
|
struct dynamic_clause ic;
|
|
struct static_clause sc;
|
|
struct static_mega_clause mc;
|
|
struct static_index si;
|
|
} ClauseUnion;
|
|
|
|
typedef union clause_ptr {
|
|
struct logic_upd_clause *luc;
|
|
struct logic_upd_index *lui;
|
|
struct dynamic_clause *ic;
|
|
struct static_clause *sc;
|
|
struct static_mega_clause *mc;
|
|
struct static_index *si;
|
|
} ClausePointer;
|
|
|
|
typedef struct index_t {
|
|
struct index_t *next, *prev;
|
|
UInt nels;
|
|
UInt arity;
|
|
PredEntry *ap;
|
|
CELL bmap;
|
|
int is_key;
|
|
int is_udi;
|
|
UInt ncollisions;
|
|
UInt max_col_count;
|
|
UInt ntrys;
|
|
UInt nentries;
|
|
UInt hsize;
|
|
BITS32 *key;
|
|
CELL *cls, *bcls;
|
|
BITS32 *links;
|
|
size_t size;
|
|
yamop *code;
|
|
BITS32 *udi_data;
|
|
void *udi_first, *udi_next;
|
|
UInt udi_free_args;
|
|
UInt udi_arg;
|
|
} Index_t;
|
|
|
|
INLINE_ONLY BITS32 EXO_ADDRESS_TO_OFFSET(struct index_t *it,
|
|
CELL *ptr);
|
|
|
|
INLINE_ONLY BITS32 EXO_ADDRESS_TO_OFFSET(struct index_t *it,
|
|
CELL *ptr) {
|
|
return (ptr - it->cls) / it->arity + 1;
|
|
}
|
|
|
|
INLINE_ONLY CELL *EXO_OFFSET_TO_ADDRESS(struct index_t *it,
|
|
BITS32 off);
|
|
|
|
INLINE_ONLY CELL *EXO_OFFSET_TO_ADDRESS(struct index_t *it,
|
|
BITS32 off) {
|
|
if (off == 0L)
|
|
return (CELL *)NULL;
|
|
return (it->cls) + (off - 1) * it->arity;
|
|
}
|
|
|
|
INLINE_ONLY BITS32 ADDRESS_TO_LINK(struct index_t *it,
|
|
BITS32 *ptr);
|
|
|
|
INLINE_ONLY BITS32 ADDRESS_TO_LINK(struct index_t *it,
|
|
BITS32 *ptr) {
|
|
return ptr - it->links;
|
|
}
|
|
|
|
INLINE_ONLY BITS32 *LINK_TO_ADDRESS(struct index_t *it,
|
|
BITS32 off);
|
|
|
|
INLINE_ONLY BITS32 *LINK_TO_ADDRESS(struct index_t *it,
|
|
BITS32 off) {
|
|
return it->links + off;
|
|
}
|
|
|
|
typedef void (*CRefitExoIndex)(struct index_t **ip, UInt b[] USES_REGS);
|
|
typedef yamop *(*CEnterExoIndex)(struct index_t *it USES_REGS);
|
|
typedef int (*CRetryExoIndex)(struct index_t *it USES_REGS);
|
|
|
|
typedef struct dbterm_list {
|
|
/* a list of dbterms associated with a clause */
|
|
DBTerm *dbterms;
|
|
yamop *clause_code;
|
|
PredEntry *p;
|
|
struct dbterm_list *next_dbl;
|
|
} DBTermList;
|
|
|
|
#define ClauseCodeToDynamicClause(p) \
|
|
((DynamicClause *)((CODEADDR)(p) - (CELL)(((DynamicClause *)NULL)->ClCode)))
|
|
#define ClauseCodeToStaticClause(p) \
|
|
((StaticClause *)((CODEADDR)(p) - (CELL)(((StaticClause *)NULL)->ClCode)))
|
|
#define ClauseCodeToLogUpdClause(p) \
|
|
((LogUpdClause *)((CODEADDR)(p) - (CELL)(((LogUpdClause *)NULL)->ClCode)))
|
|
#define ClauseCodeToMegaClause(p) \
|
|
((MegaClause *)((CODEADDR)(p) - (CELL)(((MegaClause *)NULL)->ClCode)))
|
|
#define ClauseCodeToLogUpdIndex(p) \
|
|
((LogUpdIndex *)((CODEADDR)(p) - (CELL)(((LogUpdIndex *)NULL)->ClCode)))
|
|
#define ClauseCodeToStaticIndex(p) \
|
|
((StaticIndex *)((CODEADDR)(p) - (CELL)(((StaticIndex *)NULL)->ClCode)))
|
|
|
|
#define ClauseFlagsToDynamicClause(p) ((DynamicClause *)(p))
|
|
#define ClauseFlagsToLogUpdClause(p) \
|
|
((LogUpdClause *)((CODEADDR)(p) - (CELL)(&(((LogUpdClause *)NULL)->ClFlags))))
|
|
#define ClauseFlagsToLogUpdIndex(p) \
|
|
((LogUpdIndex *)((CODEADDR)(p) - (CELL)(&(((LogUpdIndex *)NULL)->ClFlags))))
|
|
#define ClauseFlagsToStaticClause(p) ((StaticClause *)(p))
|
|
|
|
#define DynamicFlags(X) (ClauseCodeToDynamicClause(X)->ClFlags)
|
|
|
|
#define DynamicLock(X) (ClauseCodeToDynamicClause(X)->ClLock)
|
|
|
|
#if MULTIPLE_STACKS
|
|
#define INIT_CLREF_COUNT(X) (X)->ClRefCount = 0
|
|
#define INC_CLREF_COUNT(X) (X)->ClRefCount++
|
|
#define DEC_CLREF_COUNT(X) (X)->ClRefCount--
|
|
|
|
#define CL_IN_USE(X) ((X)->ClRefCount)
|
|
#else
|
|
#define INIT_CLREF_COUNT(X)
|
|
#define INC_CLREF_COUNT(X)
|
|
#define DEC_CLREF_COUNT(X)
|
|
#define CL_IN_USE(X) ((X)->ClFlags & InUseMask || (X)->ClRefCount)
|
|
#endif
|
|
|
|
/* amasm.c */
|
|
wamreg Yap_emit_x(CELL);
|
|
COUNT Yap_compile_cmp_flags(PredEntry *);
|
|
void Yap_InitComma(void);
|
|
yamop *Yap_InitCommaContinuation(PredEntry *);
|
|
|
|
/* cdmgr.c */
|
|
void Yap_IPred(PredEntry *, UInt, yamop *);
|
|
bool Yap_addclause(Term, yamop *, Term, Term, Term *);
|
|
void Yap_add_logupd_clause(PredEntry *, LogUpdClause *, int);
|
|
void Yap_kill_iblock(ClauseUnion *, ClauseUnion *, PredEntry *);
|
|
void Yap_EraseStaticClause(StaticClause *, PredEntry *, Term);
|
|
ClauseUnion *Yap_find_owner_index(yamop *, PredEntry *);
|
|
|
|
/* dbase.c */
|
|
void Yap_ErCl(DynamicClause *);
|
|
void Yap_ErLogUpdCl(LogUpdClause *);
|
|
void Yap_ErLogUpdIndex(LogUpdIndex *);
|
|
Int Yap_Recordz(Atom, Term);
|
|
Int Yap_db_nth_recorded(PredEntry *, Int USES_REGS);
|
|
Int Yap_unify_immediate_ref(DBRef ref USES_REGS);
|
|
|
|
/* exec.c */
|
|
Term Yap_cp_as_integer(choiceptr);
|
|
|
|
/* index.c */
|
|
yamop *Yap_PredIsIndexable(PredEntry *, UInt, yamop *);
|
|
yamop *Yap_ExpandIndex(PredEntry *, UInt);
|
|
void Yap_CleanUpIndex(struct logic_upd_index *);
|
|
void Yap_CleanKids(struct logic_upd_index *);
|
|
void Yap_AddClauseToIndex(PredEntry *, yamop *, int);
|
|
void Yap_RemoveClauseFromIndex(PredEntry *, yamop *);
|
|
LogUpdClause *Yap_NthClause(PredEntry *, Int);
|
|
LogUpdClause *Yap_FollowIndexingCode(PredEntry *, yamop *, Term *, yamop *,
|
|
yamop *);
|
|
|
|
/* exo.c */
|
|
yamop *Yap_ExoLookup(PredEntry *ap USES_REGS);
|
|
CELL Yap_NextExo(choiceptr cpt, struct index_t *it);
|
|
|
|
#
|
|
#if USE_THREADED_CODE
|
|
|
|
#define OP_HASH_SIZE 2048
|
|
|
|
INLINE_ONLY int rtable_hash_op(OPCODE opc, int hash_mask);
|
|
|
|
INLINE_ONLY int rtable_hash_op(OPCODE opc, int hash_mask) {
|
|
return ((((CELL)opc) >> 3) & hash_mask);
|
|
}
|
|
|
|
INLINE_ONLY op_numbers Yap_op_from_opcode(OPCODE opc);
|
|
|
|
/* given an opcode find the corresponding opnumber. This should make
|
|
switches on ops a much easier operation */
|
|
INLINE_ONLY op_numbers Yap_op_from_opcode(OPCODE opc) {
|
|
int j = rtable_hash_op(opc, OP_HASH_SIZE - 1);
|
|
|
|
while (OP_RTABLE[j].opc != opc) {
|
|
if (!OP_RTABLE[j].opc)
|
|
return _Nstop;
|
|
if (j == OP_HASH_SIZE - 1) {
|
|
j = 0;
|
|
} else {
|
|
j++;
|
|
}
|
|
}
|
|
return OP_RTABLE[j].opnum;
|
|
}
|
|
#else
|
|
static inline op_numbers Yap_op_from_opcode(OPCODE opc) {
|
|
return ((op_numbers)opc);
|
|
}
|
|
#endif /* USE_THREADED_CODE */
|
|
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
static inline int same_lu_block(yamop **, yamop *);
|
|
|
|
static inline int same_lu_block(yamop **paddr, yamop *p) {
|
|
yamop *np = *paddr;
|
|
if (np != p) {
|
|
OPCODE jmp_op = Yap_opcode(_jump_if_nonvar);
|
|
|
|
while (np->opc == jmp_op) {
|
|
np = NEXTOP(np, xll);
|
|
if (np == p)
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#define Yap_MkStaticRefTerm(cp, ap) __Yap_MkStaticRefTerm((cp), (ap)PASS_REGS)
|
|
|
|
static inline Term __Yap_MkStaticRefTerm(StaticClause *cp,
|
|
PredEntry *ap USES_REGS) {
|
|
Term t[2];
|
|
t[0] = MkIntegerTerm((Int)cp);
|
|
t[1] = MkIntegerTerm((Int)ap);
|
|
return Yap_MkApplTerm(FunctorStaticClause, 2, t);
|
|
}
|
|
|
|
static inline StaticClause *Yap_ClauseFromTerm(Term t) {
|
|
return (StaticClause *)IntegerOfTerm(ArgOfTerm(1, t));
|
|
}
|
|
|
|
#define Yap_MkMegaRefTerm(ap, ipc) __Yap_MkMegaRefTerm((ap), (ipc)PASS_REGS)
|
|
|
|
static inline Term __Yap_MkMegaRefTerm(PredEntry *ap, yamop *ipc USES_REGS) {
|
|
Term t[2];
|
|
t[0] = MkIntegerTerm((Int)ap);
|
|
t[1] = MkIntegerTerm((Int)ipc);
|
|
return Yap_MkApplTerm(FunctorMegaClause, 2, t);
|
|
}
|
|
|
|
static inline yamop *Yap_MegaClauseFromTerm(Term t) {
|
|
return (yamop *)IntegerOfTerm(ArgOfTerm(2, t));
|
|
}
|
|
|
|
static inline PredEntry *Yap_MegaClausePredicateFromTerm(Term t) {
|
|
return (PredEntry *)IntegerOfTerm(ArgOfTerm(1, t));
|
|
}
|
|
|
|
#define Yap_MkExoRefTerm(ap, i) __Yap_MkExoRefTerm((ap), (i)PASS_REGS)
|
|
|
|
static inline Term __Yap_MkExoRefTerm(PredEntry *ap, Int i USES_REGS) {
|
|
Term t[2];
|
|
t[0] = MkIntegerTerm((Int)ap);
|
|
t[1] = MkIntegerTerm((Int)i);
|
|
return Yap_MkApplTerm(FunctorExoClause, 2, t);
|
|
}
|
|
|
|
static inline Int Yap_ExoClauseFromTerm(Term t) {
|
|
return IntegerOfTerm(ArgOfTerm(2, t));
|
|
}
|
|
|
|
static inline PredEntry *Yap_ExoClausePredicateFromTerm(Term t) {
|
|
return (PredEntry *)IntegerOfTerm(ArgOfTerm(1, t));
|
|
}
|
|
|
|
/******************************************************************
|
|
|
|
EXECUTING PROLOG CLAUSES
|
|
|
|
******************************************************************/
|
|
|
|
bool Yap_search_for_static_predicate_in_use(PredEntry *p,
|
|
bool check_everything);
|
|
|
|
static inline bool Yap_static_in_use(PredEntry *p, bool check_everything) {
|
|
#if defined(YAPOR) || defined(THREADS)
|
|
return TRUE;
|
|
#else
|
|
pred_flags_t pflags = p->PredFlags;
|
|
if (pflags & (DynamicPredFlag | LogUpdatePredFlag)) {
|
|
return FALSE;
|
|
}
|
|
if (STATIC_PREDICATES_MARKED) {
|
|
return (p->PredFlags & InUsePredFlag);
|
|
} else {
|
|
/* This code does not work for YAPOR or THREADS!!!!!!!! */
|
|
return Yap_search_for_static_predicate_in_use(p, check_everything);
|
|
}
|
|
#endif
|
|
|
|
#define DEAD_REF(ref) FALSE
|
|
}
|
|
|
|
typedef enum {
|
|
FIND_PRED_FROM_ANYWHERE,
|
|
FIND_PRED_FROM_CP,
|
|
FIND_PRED_FROM_ENV
|
|
} find_pred_type;
|
|
|
|
Int Yap_PredForCode(yamop *, find_pred_type, Atom *, UInt *, Term *);
|
|
PredEntry *Yap_PredEntryForCode(yamop *, find_pred_type, void **, void **);
|
|
LogUpdClause *Yap_new_ludbe(Term, PredEntry *, UInt);
|
|
Term Yap_LUInstance(LogUpdClause *, UInt);
|
|
|
|
/* udi.c */
|
|
extern int Yap_new_udi_clause(PredEntry *, yamop *, Term);
|
|
extern yamop *Yap_udi_search(PredEntry *);
|
|
|
|
extern yap_error_descriptor_t *Yap_bug_location(yap_error_descriptor_t *t, yamop *p, yamop *cp, choiceptr b_ptr, void *env);
|
|
extern yap_error_descriptor_t *Yap_pc_add_location(yap_error_descriptor_t *t, void *p, void *b_ptr, void *env);
|
|
extern yap_error_descriptor_t * Yap_env_add_location(yap_error_descriptor_t *t, void *p, void *b_ptr, void *env, YAP_Int ignore_first);
|
|
|
|
void Yap_split_megaclause(PredEntry *ap);
|
|
|
|
#if LOW_PROF
|
|
void Yap_InformOfRemoval(void *);
|
|
void Yap_dump_code_area_for_profiler(void);
|
|
#else
|
|
#define Yap_InformOfRemoval(X)
|
|
#endif
|
|
|
|
#endif
|