1462 lines
33 KiB
C
1462 lines
33 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: adtdefs.c *
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* Last rev: *
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* mods: *
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* comments: abstract machine definitions *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "%W% %G%";
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#endif
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#define ADTDEFS_C
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#ifdef __SUNPRO_CC
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#define inline
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#endif
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#include "Yap.h"
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ADDR STD_PROTO(Yap_PreAllocCodeSpace, (void));
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Prop STD_PROTO(PredPropByFunc,(Functor, Term));
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Prop STD_PROTO(PredPropByAtom,(Atom, Term));
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#include "Yatom.h"
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#include "yapio.h"
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#include <stdio.h>
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#include <wchar.h>
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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/* this routine must be run at least having a read lock on ae */
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static Prop
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GetFunctorProp(AtomEntry *ae, unsigned int arity)
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{ /* look property list of atom a for kind */
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FunctorEntry *pp;
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pp = RepFunctorProp(ae->PropsOfAE);
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while (!EndOfPAEntr(pp) &&
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(!IsFunctorProperty(pp->KindOfPE) ||
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pp->ArityOfFE != arity))
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pp = RepFunctorProp(pp->NextOfPE);
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return (AbsFunctorProp(pp));
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}
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/* vsc: We must guarantee that IsVarTerm(functor) returns true! */
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static inline Functor
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InlinedUnlockedMkFunctor(AtomEntry *ae, unsigned int arity)
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{
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FunctorEntry *p;
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Prop p0;
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p0 = GetFunctorProp(ae, arity);
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if (p0 != NIL) {
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return ((Functor) RepProp(p0));
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}
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p = (FunctorEntry *) Yap_AllocAtomSpace(sizeof(*p));
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if (!p)
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return NULL;
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p->KindOfPE = FunctorProperty;
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p->NameOfFE = AbsAtom(ae);
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p->ArityOfFE = arity;
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p->PropsOfFE = NIL;
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p->NextOfPE = ae->PropsOfAE;
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INIT_RWLOCK(p->FRWLock);
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ae->PropsOfAE = AbsProp((PropEntry *) p);
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return ((Functor) p);
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}
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Functor
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Yap_UnlockedMkFunctor(AtomEntry *ae, unsigned int arity)
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{
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return(InlinedUnlockedMkFunctor(ae, arity));
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}
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/* vsc: We must guarantee that IsVarTerm(functor) returns true! */
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Functor
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Yap_MkFunctor(Atom ap, unsigned int arity)
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{
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AtomEntry *ae = RepAtom(ap);
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Functor f;
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WRITE_LOCK(ae->ARWLock);
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f = InlinedUnlockedMkFunctor(ae, arity);
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WRITE_UNLOCK(ae->ARWLock);
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return (f);
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}
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/* vsc: We must guarantee that IsVarTerm(functor) returns true! */
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void
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Yap_MkFunctorWithAddress(Atom ap, unsigned int arity, FunctorEntry *p)
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{
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AtomEntry *ae = RepAtom(ap);
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WRITE_LOCK(ae->ARWLock);
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p->KindOfPE = FunctorProperty;
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p->NameOfFE = ap;
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p->ArityOfFE = arity;
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p->NextOfPE = RepAtom(ap)->PropsOfAE;
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ae->PropsOfAE = AbsProp((PropEntry *) p);
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WRITE_UNLOCK(ae->ARWLock);
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}
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inline static Atom
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SearchInInvisible(char *atom)
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{
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AtomEntry *chain;
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READ_LOCK(INVISIBLECHAIN.AERWLock);
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chain = RepAtom(INVISIBLECHAIN.Entry);
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while (!EndOfPAEntr(chain) && strcmp(chain->StrOfAE, atom) != 0) {
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chain = RepAtom(chain->NextOfAE);
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}
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READ_UNLOCK(INVISIBLECHAIN.AERWLock);
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if (EndOfPAEntr(chain))
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return (NIL);
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else
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return(AbsAtom(chain));
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}
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static inline Atom
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SearchAtom(unsigned char *p, Atom a) {
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AtomEntry *ae;
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/* search atom in chain */
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while (a != NIL) {
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ae = RepAtom(a);
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if (strcmp(ae->StrOfAE, (const char *)p) == 0) {
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return(a);
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}
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a = ae->NextOfAE;
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}
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return(NIL);
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}
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static inline Atom
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SearchWideAtom(wchar_t *p, Atom a) {
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AtomEntry *ae;
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/* search atom in chain */
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while (a != NIL) {
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ae = RepAtom(a);
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if (wcscmp((wchar_t *)ae->StrOfAE, p) == 0) {
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return a;
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}
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a = ae->NextOfAE;
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}
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return(NIL);
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}
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static Atom
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LookupAtom(char *atom)
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{ /* lookup atom in atom table */
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register CELL hash;
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register unsigned char *p;
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Atom a, na;
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AtomEntry *ae;
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/* compute hash */
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p = (unsigned char *)atom;
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hash = HashFunction(p) % AtomHashTableSize;
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/* we'll start by holding a read lock in order to avoid contention */
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READ_LOCK(HashChain[hash].AERWLock);
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a = HashChain[hash].Entry;
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/* search atom in chain */
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na = SearchAtom((unsigned char *)atom, a);
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if (na != NIL) {
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READ_UNLOCK(HashChain[hash].AERWLock);
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return(na);
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}
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READ_UNLOCK(HashChain[hash].AERWLock);
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/* we need a write lock */
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WRITE_LOCK(HashChain[hash].AERWLock);
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/* concurrent version of Yap, need to take care */
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#if defined(YAPOR) || defined(THREADS)
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if (a != HashChain[hash].Entry) {
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a = HashChain[hash].Entry;
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na = SearchAtom((unsigned char *)atom, a);
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if (na != NIL) {
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WRITE_UNLOCK(HashChain[hash].AERWLock);
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return(na);
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}
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}
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#endif
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/* add new atom to start of chain */
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ae = (AtomEntry *) Yap_AllocAtomSpace((sizeof *ae) + strlen(atom) + 1);
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if (ae == NULL) {
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WRITE_UNLOCK(HashChain[hash].AERWLock);
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return NIL;
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}
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NOfAtoms++;
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na = AbsAtom(ae);
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ae->PropsOfAE = NIL;
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if (ae->StrOfAE != atom)
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strcpy(ae->StrOfAE, atom);
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ae->NextOfAE = a;
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HashChain[hash].Entry = na;
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INIT_RWLOCK(ae->ARWLock);
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WRITE_UNLOCK(HashChain[hash].AERWLock);
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if (NOfAtoms > 2*AtomHashTableSize) {
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Yap_signal(YAP_CDOVF_SIGNAL);
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}
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return na;
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}
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static Atom
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LookupWideAtom(wchar_t *atom)
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{ /* lookup atom in atom table */
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CELL hash;
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wchar_t *p;
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Atom a, na;
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AtomEntry *ae;
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UInt sz;
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WideAtomEntry *wae;
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/* compute hash */
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p = atom;
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hash = WideHashFunction(p) % WideAtomHashTableSize;
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/* we'll start by holding a read lock in order to avoid contention */
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READ_LOCK(WideHashChain[hash].AERWLock);
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a = WideHashChain[hash].Entry;
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/* search atom in chain */
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na = SearchWideAtom(atom, a);
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if (na != NIL) {
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READ_UNLOCK(WideHashChain[hash].AERWLock);
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return(na);
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}
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READ_UNLOCK(WideHashChain[hash].AERWLock);
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/* we need a write lock */
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WRITE_LOCK(WideHashChain[hash].AERWLock);
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/* concurrent version of Yap, need to take care */
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#if defined(YAPOR) || defined(THREADS)
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if (a != WideHashChain[hash].Entry) {
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a = WideHashChain[hash].Entry;
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na = SearchWideAtom(atom, a);
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if (na != NIL) {
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WRITE_UNLOCK(WideHashChain[hash].AERWLock);
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return na;
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}
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}
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#endif
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/* add new atom to start of chain */
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sz = wcslen(atom);
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ae = (AtomEntry *) Yap_AllocAtomSpace(sizeof(AtomEntry) + sizeof(wchar_t)*(sz + 1)+sizeof(WideAtomEntry));
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if (ae == NULL) {
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WRITE_UNLOCK(WideHashChain[hash].AERWLock);
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return NIL;
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}
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wae = (WideAtomEntry *)(ae->StrOfAE+sizeof(wchar_t)*(sz + 1));
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na = AbsAtom(ae);
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ae->PropsOfAE = AbsWideAtomProp(wae);
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wae->NextOfPE = NIL;
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wae->KindOfPE = WideAtomProperty;
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wae->SizeOfAtom = sz;
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if (ae->StrOfAE != (char *)atom)
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wcscpy((wchar_t *)(ae->StrOfAE), atom);
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NOfAtoms++;
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ae->NextOfAE = a;
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WideHashChain[hash].Entry = na;
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INIT_RWLOCK(ae->ARWLock);
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WRITE_UNLOCK(WideHashChain[hash].AERWLock);
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if (NOfWideAtoms > 2*WideAtomHashTableSize) {
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Yap_signal(YAP_CDOVF_SIGNAL);
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}
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return na;
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}
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Atom
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Yap_LookupMaybeWideAtom(wchar_t *atom)
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{ /* lookup atom in atom table */
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wchar_t *p = atom, c;
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size_t len = 0;
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char *ptr, *ptr0;
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Atom at;
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while ((c = *p++)) {
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if (c > 255) return LookupWideAtom(atom);
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len++;
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}
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/* not really a wide atom */
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p = atom;
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ptr0 = ptr = Yap_AllocCodeSpace(len+1);
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if (!ptr)
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return NIL;
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while ((*ptr++ = *p++));
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at = LookupAtom(ptr0);
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Yap_FreeCodeSpace(ptr0);
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return at;
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}
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Atom
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Yap_LookupAtom(char *atom)
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{ /* lookup atom in atom table */
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return LookupAtom(atom);
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}
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Atom
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Yap_LookupWideAtom(wchar_t *atom)
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{ /* lookup atom in atom table */
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return LookupWideAtom(atom);
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}
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Atom
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Yap_FullLookupAtom(char *atom)
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{ /* lookup atom in atom table */
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Atom t;
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if ((t = SearchInInvisible(atom)) != NIL) {
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return (t);
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}
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return(LookupAtom(atom));
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}
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void
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Yap_LookupAtomWithAddress(char *atom, AtomEntry *ae)
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{ /* lookup atom in atom table */
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register CELL hash;
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register unsigned char *p;
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Atom a;
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/* compute hash */
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p = (unsigned char *)atom;
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hash = HashFunction(p) % AtomHashTableSize;
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/* ask for a WRITE lock because it is highly unlikely we shall find anything */
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WRITE_LOCK(HashChain[hash].AERWLock);
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a = HashChain[hash].Entry;
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/* search atom in chain */
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if (SearchAtom(p, a) != NIL) {
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Yap_Error(INTERNAL_ERROR,TermNil,"repeated initialisation for atom %s", ae);
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WRITE_UNLOCK(HashChain[hash].AERWLock);
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return;
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}
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/* add new atom to start of chain */
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NOfAtoms++;
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ae->NextOfAE = a;
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HashChain[hash].Entry = AbsAtom(ae);
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ae->PropsOfAE = NIL;
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strcpy(ae->StrOfAE, atom);
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INIT_RWLOCK(ae->ARWLock);
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WRITE_UNLOCK(HashChain[hash].AERWLock);
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}
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void
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Yap_ReleaseAtom(Atom atom)
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{ /* Releases an atom from the hash chain */
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register Int hash;
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register unsigned char *p;
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AtomEntry *inChain;
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AtomEntry *ap = RepAtom(atom);
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char *name = ap->StrOfAE;
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/* compute hash */
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p = (unsigned char *)name;
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hash = HashFunction(p) % AtomHashTableSize;
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WRITE_LOCK(HashChain[hash].AERWLock);
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if (HashChain[hash].Entry == atom) {
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NOfAtoms--;
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HashChain[hash].Entry = ap->NextOfAE;
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WRITE_UNLOCK(HashChain[hash].AERWLock);
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return;
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}
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/* else */
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inChain = RepAtom(HashChain[hash].Entry);
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while (inChain->NextOfAE != atom)
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inChain = RepAtom(inChain->NextOfAE);
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WRITE_LOCK(inChain->ARWLock);
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inChain->NextOfAE = ap->NextOfAE;
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WRITE_UNLOCK(inChain->ARWLock);
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WRITE_UNLOCK(HashChain[hash].AERWLock);
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}
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static Prop
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GetAPropHavingLock(AtomEntry *ae, PropFlags kind)
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{ /* look property list of atom a for kind */
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PropEntry *pp;
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pp = RepProp(ae->PropsOfAE);
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while (!EndOfPAEntr(pp) && pp->KindOfPE != kind)
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pp = RepProp(pp->NextOfPE);
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return (AbsProp(pp));
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}
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Prop
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Yap_GetAPropHavingLock(AtomEntry *ae, PropFlags kind)
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{ /* look property list of atom a for kind */
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return GetAPropHavingLock(ae,kind);
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}
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static Prop
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GetAProp(Atom a, PropFlags kind)
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{ /* look property list of atom a for kind */
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AtomEntry *ae = RepAtom(a);
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Prop out;
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READ_LOCK(ae->ARWLock);
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out = GetAPropHavingLock(ae, kind);
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READ_UNLOCK(ae->ARWLock);
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return (out);
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}
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Prop
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Yap_GetAProp(Atom a, PropFlags kind)
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{ /* look property list of atom a for kind */
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return GetAProp(a,kind);
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}
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OpEntry *
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Yap_GetOpPropForAModuleHavingALock(Atom a, Term mod)
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{ /* look property list of atom a for kind */
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AtomEntry *ae = RepAtom(a);
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PropEntry *pp;
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pp = RepProp(ae->PropsOfAE);
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while (!EndOfPAEntr(pp) &&
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(pp->KindOfPE != OpProperty ||
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((OpEntry *)pp)->OpModule != mod))
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pp = RepProp(pp->NextOfPE);
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if (EndOfPAEntr(pp)) {
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return NULL;
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}
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return (OpEntry *)pp;
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}
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int
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Yap_HasOp(Atom a)
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{ /* look property list of atom a for kind */
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AtomEntry *ae = RepAtom(a);
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PropEntry *pp;
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READ_LOCK(ae->ARWLock);
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pp = RepProp(ae->PropsOfAE);
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while (!EndOfPAEntr(pp) &&
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( pp->KindOfPE != OpProperty))
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pp = RepProp(pp->NextOfPE);
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READ_UNLOCK(ae->ARWLock);
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if (EndOfPAEntr(pp)) {
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return FALSE;
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} else {
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return TRUE;
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}
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}
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OpEntry *
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Yap_GetOpProp(Atom a, op_type type)
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{ /* look property list of atom a for kind */
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AtomEntry *ae = RepAtom(a);
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PropEntry *pp;
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OpEntry *info = NULL;
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READ_LOCK(ae->ARWLock);
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pp = RepProp(ae->PropsOfAE);
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while (!EndOfPAEntr(pp) &&
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( pp->KindOfPE != OpProperty ||
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((OpEntry *)pp)->OpModule != CurrentModule))
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pp = RepProp(pp->NextOfPE);
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if ((info = (OpEntry *)pp)) {
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if ((type == INFIX_OP && !info->Infix) ||
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(type == POSFIX_OP && !info->Posfix) ||
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(type == PREFIX_OP && !info->Prefix))
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pp = RepProp(NIL);
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}
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if (EndOfPAEntr(pp)) {
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pp = RepProp(ae->PropsOfAE);
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while (!EndOfPAEntr(pp) &&
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( pp->KindOfPE != OpProperty ||
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((OpEntry *)pp)->OpModule != PROLOG_MODULE))
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pp = RepProp(pp->NextOfPE);
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if ((info = (OpEntry *)pp)) {
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if ((type == INFIX_OP && !info->Infix) ||
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(type == POSFIX_OP && !info->Posfix) ||
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(type == PREFIX_OP && !info->Prefix))
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pp = RepProp(NIL);
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}
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}
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if (!info) {
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READ_UNLOCK(ae->ARWLock);
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return NULL;
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} else {
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READ_LOCK(info->OpRWLock);
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READ_UNLOCK(ae->ARWLock);
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return info;
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}
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}
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inline static Prop
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GetPredPropByAtomHavingLock(AtomEntry* ae, Term cur_mod)
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/* get predicate entry for ap/arity; create it if neccessary. */
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{
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Prop p0;
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p0 = ae->PropsOfAE;
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while (p0) {
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PredEntry *pe = RepPredProp(p0);
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if ( pe->KindOfPE == PEProp &&
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(pe->ModuleOfPred == cur_mod || !pe->ModuleOfPred)) {
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return(p0);
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#if THREADS
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/* Thread Local Predicates */
|
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if (pe->PredFlags & ThreadLocalPredFlag) {
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return AbsPredProp(Yap_GetThreadPred(pe));
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}
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#endif
|
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}
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p0 = pe->NextOfPE;
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}
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return(NIL);
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}
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Prop
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Yap_GetPredPropByAtom(Atom at, Term cur_mod)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
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|
{
|
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Prop p0;
|
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AtomEntry *ae = RepAtom(at);
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|
|
|
READ_LOCK(ae->ARWLock);
|
|
p0 = GetPredPropByAtomHavingLock(ae, cur_mod);
|
|
READ_UNLOCK(ae->ARWLock);
|
|
return(p0);
|
|
}
|
|
|
|
|
|
inline static Prop
|
|
GetPredPropByAtomHavingLockInThisModule(AtomEntry* ae, Term cur_mod)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
|
|
{
|
|
Prop p0;
|
|
|
|
p0 = ae->PropsOfAE;
|
|
while (p0) {
|
|
PredEntry *pe = RepPredProp(p0);
|
|
if ( pe->KindOfPE == PEProp && pe->ModuleOfPred == cur_mod ) {
|
|
#if THREADS
|
|
/* Thread Local Predicates */
|
|
if (pe->PredFlags & ThreadLocalPredFlag) {
|
|
return AbsPredProp(Yap_GetThreadPred(pe));
|
|
}
|
|
#endif
|
|
return(p0);
|
|
}
|
|
p0 = pe->NextOfPE;
|
|
}
|
|
return(NIL);
|
|
}
|
|
|
|
Prop
|
|
Yap_GetPredPropByAtomInThisModule(Atom at, Term cur_mod)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
|
|
{
|
|
Prop p0;
|
|
AtomEntry *ae = RepAtom(at);
|
|
|
|
READ_LOCK(ae->ARWLock);
|
|
p0 = GetPredPropByAtomHavingLockInThisModule(ae, cur_mod);
|
|
READ_UNLOCK(ae->ARWLock);
|
|
return(p0);
|
|
}
|
|
|
|
|
|
Prop
|
|
Yap_GetPredPropByFunc(Functor f, Term cur_mod)
|
|
/* get predicate entry for ap/arity; */
|
|
{
|
|
Prop p0;
|
|
|
|
READ_LOCK(f->FRWLock);
|
|
|
|
p0 = GetPredPropByFuncHavingLock(f, cur_mod);
|
|
READ_UNLOCK(f->FRWLock);
|
|
return (p0);
|
|
}
|
|
|
|
Prop
|
|
Yap_GetPredPropByFuncInThisModule(Functor f, Term cur_mod)
|
|
/* get predicate entry for ap/arity; */
|
|
{
|
|
Prop p0;
|
|
|
|
READ_LOCK(f->FRWLock);
|
|
p0 = GetPredPropByFuncHavingLock(f, cur_mod);
|
|
READ_UNLOCK(f->FRWLock);
|
|
return (p0);
|
|
}
|
|
|
|
Prop
|
|
Yap_GetPredPropHavingLock(Atom ap, unsigned int arity, Term mod)
|
|
/* get predicate entry for ap/arity; */
|
|
{
|
|
Prop p0;
|
|
AtomEntry *ae = RepAtom(ap);
|
|
Functor f;
|
|
|
|
if (arity == 0) {
|
|
GetPredPropByAtomHavingLock(ae, mod);
|
|
}
|
|
f = InlinedUnlockedMkFunctor(ae, arity);
|
|
READ_LOCK(f->FRWLock);
|
|
p0 = GetPredPropByFuncHavingLock(f, mod);
|
|
READ_UNLOCK(f->FRWLock);
|
|
return (p0);
|
|
}
|
|
|
|
/* get expression entry for at/arity; */
|
|
Prop
|
|
Yap_GetExpProp(Atom at, unsigned int arity)
|
|
{
|
|
Prop p0;
|
|
AtomEntry *ae = RepAtom(at);
|
|
ExpEntry *p;
|
|
|
|
READ_LOCK(ae->ARWLock);
|
|
p = RepExpProp(p0 = ae->PropsOfAE);
|
|
while (p0 && (p->KindOfPE != ExpProperty || p->ArityOfEE != arity))
|
|
p = RepExpProp(p0 = p->NextOfPE);
|
|
READ_UNLOCK(ae->ARWLock);
|
|
return (p0);
|
|
}
|
|
|
|
/* get expression entry for at/arity, at is already locked; */
|
|
Prop
|
|
Yap_GetExpPropHavingLock(AtomEntry *ae, unsigned int arity)
|
|
{
|
|
Prop p0;
|
|
ExpEntry *p;
|
|
|
|
p = RepExpProp(p0 = ae->PropsOfAE);
|
|
while (p0 && (p->KindOfPE != ExpProperty || p->ArityOfEE != arity))
|
|
p = RepExpProp(p0 = p->NextOfPE);
|
|
|
|
return (p0);
|
|
}
|
|
|
|
static int
|
|
ExpandPredHash(void)
|
|
{
|
|
UInt new_size = PredHashTableSize+PredHashIncrement;
|
|
PredEntry **oldp = PredHash;
|
|
PredEntry **np = (PredEntry **) Yap_AllocAtomSpace(sizeof(PredEntry **)*new_size);
|
|
UInt i;
|
|
|
|
if (!np) {
|
|
return FALSE;
|
|
}
|
|
for (i = 0; i < new_size; i++) {
|
|
np[i] = NULL;
|
|
}
|
|
for (i = 0; i < PredHashTableSize; i++) {
|
|
PredEntry *p = PredHash[i];
|
|
|
|
while (p) {
|
|
Prop nextp = p->NextOfPE;
|
|
UInt hsh = PRED_HASH(p->FunctorOfPred, p->ModuleOfPred, new_size);
|
|
p->NextOfPE = AbsPredProp(np[hsh]);
|
|
np[hsh] = p;
|
|
p = RepPredProp(nextp);
|
|
}
|
|
}
|
|
PredHashTableSize = new_size;
|
|
PredHash = np;
|
|
Yap_FreeAtomSpace((ADDR)oldp);
|
|
return TRUE;
|
|
}
|
|
|
|
/* fe is supposed to be locked */
|
|
Prop
|
|
Yap_NewPredPropByFunctor(FunctorEntry *fe, Term cur_mod)
|
|
{
|
|
PredEntry *p = (PredEntry *) Yap_AllocAtomSpace(sizeof(*p));
|
|
|
|
if (p == NULL) {
|
|
WRITE_UNLOCK(fe->FRWLock);
|
|
return NULL;
|
|
}
|
|
if (cur_mod == TermProlog)
|
|
p->ModuleOfPred = 0L;
|
|
else
|
|
p->ModuleOfPred = cur_mod;
|
|
if (fe->PropsOfFE) {
|
|
UInt hsh = PRED_HASH(fe, cur_mod, PredHashTableSize);
|
|
|
|
WRITE_LOCK(PredHashRWLock);
|
|
if (10*(PredsInHashTable+1) > 6*PredHashTableSize) {
|
|
if (!ExpandPredHash()) {
|
|
Yap_FreeCodeSpace((ADDR)p);
|
|
WRITE_UNLOCK(PredHashRWLock);
|
|
WRITE_UNLOCK(fe->FRWLock);
|
|
return NULL;
|
|
}
|
|
/* retry hashing */
|
|
hsh = PRED_HASH(fe, cur_mod, PredHashTableSize);
|
|
}
|
|
PredsInHashTable++;
|
|
if (p->ModuleOfPred == 0L) {
|
|
PredEntry *pe = RepPredProp(fe->PropsOfFE);
|
|
|
|
hsh = PRED_HASH(fe, pe->ModuleOfPred, PredHashTableSize);
|
|
/* should be the first one */
|
|
pe->NextOfPE = AbsPredProp(PredHash[hsh]);
|
|
PredHash[hsh] = pe;
|
|
fe->PropsOfFE = AbsPredProp(p);
|
|
} else {
|
|
p->NextOfPE = AbsPredProp(PredHash[hsh]);
|
|
PredHash[hsh] = p;
|
|
}
|
|
WRITE_UNLOCK(PredHashRWLock);
|
|
/* make sure that we have something here: note that this is not a valid pointer!! */
|
|
RepPredProp(fe->PropsOfFE)->NextOfPE = fe->PropsOfFE;
|
|
} else {
|
|
fe->PropsOfFE = AbsPredProp(p);
|
|
p->NextOfPE = NIL;
|
|
}
|
|
INIT_LOCK(p->PELock);
|
|
p->KindOfPE = PEProp;
|
|
p->ArityOfPE = fe->ArityOfFE;
|
|
p->cs.p_code.FirstClause = p->cs.p_code.LastClause = NULL;
|
|
p->cs.p_code.NOfClauses = 0;
|
|
p->PredFlags = 0L;
|
|
p->src.OwnerFile = AtomNil;
|
|
p->OpcodeOfPred = UNDEF_OPCODE;
|
|
p->CodeOfPred = p->cs.p_code.TrueCodeOfPred = (yamop *)(&(p->OpcodeOfPred));
|
|
p->cs.p_code.ExpandCode = EXPAND_OP_CODE;
|
|
p->TimeStampOfPred = 0L;
|
|
p->LastCallOfPred = LUCALL_ASSERT;
|
|
if (cur_mod == TermProlog)
|
|
p->ModuleOfPred = 0L;
|
|
else
|
|
p->ModuleOfPred = cur_mod;
|
|
Yap_NewModulePred(cur_mod, p);
|
|
INIT_LOCK(p->StatisticsForPred.lock);
|
|
p->StatisticsForPred.NOfEntries = 0;
|
|
p->StatisticsForPred.NOfHeadSuccesses = 0;
|
|
p->StatisticsForPred.NOfRetries = 0;
|
|
#ifdef TABLING
|
|
p->TableOfPred = NULL;
|
|
#endif /* TABLING */
|
|
#ifdef BEAM
|
|
p->beamTable = NULL;
|
|
#endif /* BEAM */
|
|
/* careful that they don't cross MkFunctor */
|
|
if (PRED_GOAL_EXPANSION_FUNC) {
|
|
if (fe->PropsOfFE &&
|
|
(RepPredProp(fe->PropsOfFE)->PredFlags & GoalExPredFlag)) {
|
|
p->PredFlags |= GoalExPredFlag;
|
|
}
|
|
}
|
|
p->FunctorOfPred = fe;
|
|
WRITE_UNLOCK(fe->FRWLock);
|
|
#ifdef LOW_PROF
|
|
if (ProfilerOn &&
|
|
Yap_OffLineProfiler) {
|
|
Yap_inform_profiler_of_clause((yamop *)&(p->OpcodeOfPred), (yamop *)(&(p->OpcodeOfPred)+1), p, 1);
|
|
if (!(p->PredFlags & (CPredFlag|AsmPredFlag))) {
|
|
Yap_inform_profiler_of_clause((yamop *)&(p->cs.p_code.ExpandCode), (yamop *)(&(p->cs.p_code.ExpandCode)+1), p, 1);
|
|
}
|
|
}
|
|
#endif /* LOW_PROF */
|
|
return AbsPredProp(p);
|
|
}
|
|
|
|
#if THREADS
|
|
Prop
|
|
Yap_NewThreadPred(PredEntry *ap)
|
|
{
|
|
PredEntry *p = (PredEntry *) Yap_AllocAtomSpace(sizeof(*p));
|
|
|
|
if (p == NULL) {
|
|
return NIL;
|
|
}
|
|
INIT_LOCK(p->PELock);
|
|
p->KindOfPE = PEProp;
|
|
p->ArityOfPE = ap->ArityOfPE;
|
|
p->cs.p_code.FirstClause = p->cs.p_code.LastClause = NULL;
|
|
p->cs.p_code.NOfClauses = 0;
|
|
p->PredFlags = ap->PredFlags & ~(IndexedPredFlag|SpiedPredFlag);
|
|
p->src.OwnerFile = ap->src.OwnerFile;
|
|
p->OpcodeOfPred = UNDEF_OPCODE;
|
|
p->CodeOfPred = p->cs.p_code.TrueCodeOfPred = (yamop *)(&(p->OpcodeOfPred));
|
|
p->cs.p_code.ExpandCode = EXPAND_OP_CODE;
|
|
p->ModuleOfPred = ap->ModuleOfPred;
|
|
p->NextPredOfModule = NULL;
|
|
p->TimeStampOfPred = 0L;
|
|
p->LastCallOfPred = LUCALL_ASSERT;
|
|
INIT_LOCK(p->StatisticsForPred.lock);
|
|
p->StatisticsForPred.NOfEntries = 0;
|
|
p->StatisticsForPred.NOfHeadSuccesses = 0;
|
|
p->StatisticsForPred.NOfRetries = 0;
|
|
#ifdef TABLING
|
|
p->TableOfPred = NULL;
|
|
#endif /* TABLING */
|
|
#ifdef BEAM
|
|
p->beamTable = NULL;
|
|
#endif
|
|
/* careful that they don't cross MkFunctor */
|
|
p->NextOfPE = AbsPredProp(MY_ThreadHandle.local_preds);
|
|
MY_ThreadHandle.local_preds = p;
|
|
p->FunctorOfPred = ap->FunctorOfPred;
|
|
#ifdef LOW_PROF
|
|
if (ProfilerOn &&
|
|
Yap_OffLineProfiler) {
|
|
Yap_inform_profiler_of_clause((yamop *)&(p->OpcodeOfPred), (yamop *)(&(p->OpcodeOfPred)+1), p, 1);
|
|
if (!(p->PredFlags & (CPredFlag|AsmPredFlag))) {
|
|
Yap_inform_profiler_of_clause((yamop *)&(p->cs.p_code.ExpandCode), (yamop *)(&(p->cs.p_code.ExpandCode)+1), p, 1);
|
|
}
|
|
}
|
|
#endif /* LOW_PROF */
|
|
return AbsPredProp(p);
|
|
}
|
|
#endif
|
|
|
|
Prop
|
|
Yap_NewPredPropByAtom(AtomEntry *ae, Term cur_mod)
|
|
{
|
|
Prop p0;
|
|
PredEntry *p = (PredEntry *) Yap_AllocAtomSpace(sizeof(*p));
|
|
|
|
/* Printf("entering %s:%s/0\n", RepAtom(AtomOfTerm(cur_mod))->StrOfAE, ae->StrOfAE); */
|
|
|
|
if (p == NULL) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return NIL;
|
|
}
|
|
INIT_LOCK(p->PELock);
|
|
p->KindOfPE = PEProp;
|
|
p->ArityOfPE = 0;
|
|
p->cs.p_code.FirstClause = p->cs.p_code.LastClause = NULL;
|
|
p->cs.p_code.NOfClauses = 0;
|
|
p->PredFlags = 0L;
|
|
p->src.OwnerFile = AtomNil;
|
|
p->OpcodeOfPred = UNDEF_OPCODE;
|
|
p->cs.p_code.ExpandCode = EXPAND_OP_CODE;
|
|
p->CodeOfPred = p->cs.p_code.TrueCodeOfPred = (yamop *)(&(p->OpcodeOfPred));
|
|
if (cur_mod == TermProlog)
|
|
p->ModuleOfPred = 0;
|
|
else
|
|
p->ModuleOfPred = cur_mod;
|
|
Yap_NewModulePred(cur_mod, p);
|
|
INIT_LOCK(p->StatisticsForPred.lock);
|
|
p->StatisticsForPred.NOfEntries = 0;
|
|
p->StatisticsForPred.NOfHeadSuccesses = 0;
|
|
p->StatisticsForPred.NOfRetries = 0;
|
|
p->TimeStampOfPred = 0L;
|
|
p->LastCallOfPred = LUCALL_ASSERT;
|
|
#ifdef TABLING
|
|
p->TableOfPred = NULL;
|
|
#endif /* TABLING */
|
|
#ifdef BEAM
|
|
p->beamTable = NULL;
|
|
#endif
|
|
/* careful that they don't cross MkFunctor */
|
|
p->NextOfPE = ae->PropsOfAE;
|
|
if (PRED_GOAL_EXPANSION_FUNC) {
|
|
Prop p1 = ae->PropsOfAE;
|
|
|
|
while (p1) {
|
|
PredEntry *pe = RepPredProp(p1);
|
|
|
|
if (pe->KindOfPE == PEProp) {
|
|
if (pe->PredFlags & GoalExPredFlag) {
|
|
p->PredFlags |= GoalExPredFlag;
|
|
}
|
|
break;
|
|
}
|
|
p1 = pe->NextOfPE;
|
|
}
|
|
}
|
|
ae->PropsOfAE = p0 = AbsPredProp(p);
|
|
p->FunctorOfPred = (Functor)AbsAtom(ae);
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
#ifdef LOW_PROF
|
|
if (ProfilerOn &&
|
|
Yap_OffLineProfiler) {
|
|
Yap_inform_profiler_of_clause((yamop *)&(p->OpcodeOfPred), (yamop *)(&(p->OpcodeOfPred)+1), p, 1);
|
|
if (!(p->PredFlags & (CPredFlag|AsmPredFlag))) {
|
|
Yap_inform_profiler_of_clause((yamop *)&(p->cs.p_code.ExpandCode), (yamop *)(&(p->cs.p_code.ExpandCode)+1), p, 1);
|
|
}
|
|
}
|
|
#endif /* LOW_PROF */
|
|
return p0;
|
|
}
|
|
|
|
Prop
|
|
Yap_PredPropByFunctorNonThreadLocal(Functor f, Term cur_mod)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
|
|
{
|
|
PredEntry *p;
|
|
|
|
WRITE_LOCK(f->FRWLock);
|
|
if (!(p = RepPredProp(f->PropsOfFE)))
|
|
return Yap_NewPredPropByFunctor(f,cur_mod);
|
|
|
|
if ((p->ModuleOfPred == cur_mod || !(p->ModuleOfPred))) {
|
|
WRITE_UNLOCK(f->FRWLock);
|
|
return AbsPredProp(p);
|
|
}
|
|
if (p->NextOfPE) {
|
|
UInt hash = PRED_HASH(f,cur_mod,PredHashTableSize);
|
|
READ_LOCK(PredHashRWLock);
|
|
p = PredHash[hash];
|
|
|
|
while (p) {
|
|
if (p->FunctorOfPred == f &&
|
|
p->ModuleOfPred == cur_mod)
|
|
{
|
|
READ_UNLOCK(PredHashRWLock);
|
|
WRITE_UNLOCK(f->FRWLock);
|
|
return AbsPredProp(p);
|
|
}
|
|
p = RepPredProp(p->NextOfPE);
|
|
}
|
|
READ_UNLOCK(PredHashRWLock);
|
|
}
|
|
return Yap_NewPredPropByFunctor(f,cur_mod);
|
|
}
|
|
|
|
Prop
|
|
Yap_PredPropByAtomNonThreadLocal(Atom at, Term cur_mod)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
|
|
{
|
|
Prop p0;
|
|
AtomEntry *ae = RepAtom(at);
|
|
|
|
WRITE_LOCK(ae->ARWLock);
|
|
p0 = ae->PropsOfAE;
|
|
while (p0) {
|
|
PredEntry *pe = RepPredProp(p0);
|
|
if ( pe->KindOfPE == PEProp &&
|
|
(pe->ModuleOfPred == cur_mod || !pe->ModuleOfPred)) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return(p0);
|
|
}
|
|
p0 = pe->NextOfPE;
|
|
}
|
|
return Yap_NewPredPropByAtom(ae,cur_mod);
|
|
}
|
|
|
|
|
|
|
|
Term
|
|
Yap_GetValue(Atom a)
|
|
{
|
|
Prop p0 = GetAProp(a, ValProperty);
|
|
Term out;
|
|
|
|
if (p0 == NIL)
|
|
return (TermNil);
|
|
READ_LOCK(RepValProp(p0)->VRWLock);
|
|
out = RepValProp(p0)->ValueOfVE;
|
|
if (IsApplTerm(out)) {
|
|
Functor f = FunctorOfTerm(out);
|
|
if (f == FunctorDouble) {
|
|
out = MkFloatTerm(FloatOfTerm(out));
|
|
} else if (f == FunctorLongInt) {
|
|
out = MkLongIntTerm(LongIntOfTerm(out));
|
|
}
|
|
#ifdef USE_GMP
|
|
else {
|
|
out = Yap_MkBigIntTerm(Yap_BigIntOfTerm(out));
|
|
}
|
|
#endif
|
|
}
|
|
READ_UNLOCK(RepValProp(p0)->VRWLock);
|
|
return (out);
|
|
}
|
|
|
|
void
|
|
Yap_PutValue(Atom a, Term v)
|
|
{
|
|
AtomEntry *ae = RepAtom(a);
|
|
Prop p0;
|
|
ValEntry *p;
|
|
Term t0;
|
|
|
|
WRITE_LOCK(ae->ARWLock);
|
|
p0 = GetAPropHavingLock(ae, ValProperty);
|
|
if (p0 != NIL) {
|
|
p = RepValProp(p0);
|
|
WRITE_LOCK(p->VRWLock);
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
} else {
|
|
p = (ValEntry *) Yap_AllocAtomSpace(sizeof(ValEntry));
|
|
if (p == NULL) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return;
|
|
}
|
|
p->NextOfPE = RepAtom(a)->PropsOfAE;
|
|
RepAtom(a)->PropsOfAE = AbsValProp(p);
|
|
p->KindOfPE = ValProperty;
|
|
p->ValueOfVE = TermNil;
|
|
/* take care that the lock for the property will be inited even
|
|
if someone else searches for the property */
|
|
INIT_RWLOCK(p->VRWLock);
|
|
WRITE_LOCK(p->VRWLock);
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
}
|
|
t0 = p->ValueOfVE;
|
|
if (IsFloatTerm(v)) {
|
|
/* store a float in code space, so that we can access the property */
|
|
union {
|
|
Float f;
|
|
CELL ar[sizeof(Float) / sizeof(CELL)];
|
|
} un;
|
|
CELL *pt, *iptr;
|
|
unsigned int i;
|
|
|
|
un.f = FloatOfTerm(v);
|
|
if (IsFloatTerm(t0)) {
|
|
pt = RepAppl(t0);
|
|
} else {
|
|
if (IsApplTerm(t0)) {
|
|
Yap_FreeCodeSpace((char *) (RepAppl(t0)));
|
|
}
|
|
pt = (CELL *) Yap_AllocAtomSpace(sizeof(CELL)*(1 + 2*sizeof(Float)/sizeof(CELL)));
|
|
if (pt == NULL) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return;
|
|
}
|
|
p->ValueOfVE = AbsAppl(pt);
|
|
pt[0] = (CELL)FunctorDouble;
|
|
}
|
|
|
|
iptr = pt+1;
|
|
for (i = 0; i < sizeof(Float) / sizeof(CELL); i++) {
|
|
*iptr++ = (CELL)un.ar[i];
|
|
}
|
|
} else if (IsLongIntTerm(v)) {
|
|
CELL *pt;
|
|
Int val = LongIntOfTerm(v);
|
|
|
|
if (IsLongIntTerm(t0)) {
|
|
pt = RepAppl(t0);
|
|
} else {
|
|
if (IsApplTerm(t0)) {
|
|
Yap_FreeCodeSpace((char *) (RepAppl(t0)));
|
|
}
|
|
pt = (CELL *) Yap_AllocAtomSpace(2*sizeof(CELL));
|
|
if (pt == NULL) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return;
|
|
}
|
|
p->ValueOfVE = AbsAppl(pt);
|
|
pt[0] = (CELL)FunctorLongInt;
|
|
}
|
|
pt[1] = (CELL)val;
|
|
#ifdef USE_GMP
|
|
} else if (IsBigIntTerm(v)) {
|
|
CELL *ap = RepAppl(v);
|
|
Int sz =
|
|
sizeof(MP_INT)+sizeof(CELL)+
|
|
(((MP_INT *)(ap+1))->_mp_alloc*sizeof(mp_limb_t));
|
|
CELL *pt = (CELL *) Yap_AllocAtomSpace(sz);
|
|
|
|
if (pt == NULL) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return;
|
|
}
|
|
if (IsApplTerm(t0)) {
|
|
Yap_FreeCodeSpace((char *) RepAppl(t0));
|
|
}
|
|
memcpy((void *)pt, (void *)ap, sz);
|
|
p->ValueOfVE = AbsAppl(pt);
|
|
#endif
|
|
} else {
|
|
if (IsApplTerm(t0)) {
|
|
/* recover space */
|
|
Yap_FreeCodeSpace((char *) (RepAppl(p->ValueOfVE)));
|
|
}
|
|
p->ValueOfVE = v;
|
|
}
|
|
WRITE_UNLOCK(p->VRWLock);
|
|
}
|
|
|
|
Term
|
|
Yap_StringToList(char *s)
|
|
{
|
|
register Term t;
|
|
register unsigned char *cp = (unsigned char *)s + strlen(s);
|
|
|
|
t = MkAtomTerm(AtomNil);
|
|
while (cp > (unsigned char *)s) {
|
|
t = MkPairTerm(MkIntTerm(*--cp), t);
|
|
}
|
|
return (t);
|
|
}
|
|
|
|
Term
|
|
Yap_NStringToList(char *s, size_t len)
|
|
{
|
|
Term t;
|
|
char *cp = s + len;
|
|
|
|
t = MkAtomTerm(AtomNil);
|
|
while (cp > s) {
|
|
t = MkPairTerm(MkIntegerTerm(*--cp), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_WideStringToList(wchar_t *s)
|
|
{
|
|
Term t;
|
|
wchar_t *cp = s + wcslen(s);
|
|
|
|
t = MkAtomTerm(AtomNil);
|
|
while (cp > s) {
|
|
t = MkPairTerm(MkIntegerTerm(*--cp), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_NWideStringToList(wchar_t *s, size_t len)
|
|
{
|
|
Term t;
|
|
wchar_t *cp = s + len;
|
|
|
|
t = MkAtomTerm(AtomNil);
|
|
while (cp > s) {
|
|
t = MkPairTerm(MkIntegerTerm(*--cp), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_StringToDiffList(char *s, Term t)
|
|
{
|
|
register unsigned char *cp = (unsigned char *)s + strlen(s);
|
|
|
|
while (cp > (unsigned char *)s) {
|
|
t = MkPairTerm(MkIntTerm(*--cp), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_NStringToDiffList(char *s, Term t, size_t len)
|
|
{
|
|
register unsigned char *cp = (unsigned char *)s + len;
|
|
|
|
while (cp > (unsigned char *)s) {
|
|
t = MkPairTerm(MkIntTerm(*--cp), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_WideStringToDiffList(wchar_t *s, Term t)
|
|
{
|
|
wchar_t *cp = s + wcslen(s);
|
|
|
|
while (cp > s) {
|
|
t = MkPairTerm(MkIntegerTerm(*--cp), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_NWideStringToDiffList(wchar_t *s, Term t, size_t len)
|
|
{
|
|
wchar_t *cp = s + len;
|
|
|
|
while (cp > s) {
|
|
t = MkPairTerm(MkIntegerTerm(*--cp), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_StringToListOfAtoms(char *s)
|
|
{
|
|
register Term t;
|
|
char so[2];
|
|
register unsigned char *cp = (unsigned char *)s + strlen(s);
|
|
|
|
so[1] = '\0';
|
|
t = MkAtomTerm(AtomNil);
|
|
while (cp > (unsigned char *)s) {
|
|
so[0] = *--cp;
|
|
t = MkPairTerm(MkAtomTerm(LookupAtom(so)), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_NStringToListOfAtoms(char *s, size_t len)
|
|
{
|
|
register Term t;
|
|
char so[2];
|
|
register unsigned char *cp = (unsigned char *)s + len;
|
|
|
|
so[1] = '\0';
|
|
t = MkAtomTerm(AtomNil);
|
|
while (cp > (unsigned char *)s) {
|
|
so[0] = *--cp;
|
|
t = MkPairTerm(MkAtomTerm(LookupAtom(so)), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_WideStringToListOfAtoms(wchar_t *s)
|
|
{
|
|
register Term t;
|
|
wchar_t so[2];
|
|
wchar_t *cp = s + wcslen(s);
|
|
|
|
so[1] = '\0';
|
|
t = MkAtomTerm(AtomNil);
|
|
while (cp > s) {
|
|
so[0] = *--cp;
|
|
t = MkPairTerm(MkAtomTerm(LookupWideAtom(so)), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_NWideStringToListOfAtoms(wchar_t *s, size_t len)
|
|
{
|
|
register Term t;
|
|
wchar_t so[2];
|
|
wchar_t *cp = s + len;
|
|
|
|
so[1] = '\0';
|
|
t = MkAtomTerm(AtomNil);
|
|
while (cp > s) {
|
|
so[0] = *--cp;
|
|
t = MkPairTerm(MkAtomTerm(LookupWideAtom(so)), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_NWideStringToDiffListOfAtoms(wchar_t *s, Term t0, size_t len)
|
|
{
|
|
register Term t;
|
|
wchar_t so[2];
|
|
wchar_t *cp = s + len;
|
|
|
|
so[1] = '\0';
|
|
t = t0;
|
|
while (cp > s) {
|
|
so[0] = *--cp;
|
|
t = MkPairTerm(MkAtomTerm(LookupWideAtom(so)), t);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
Term
|
|
Yap_ArrayToList(register Term *tp, int nof)
|
|
{
|
|
register Term *pt = tp + nof;
|
|
register Term t;
|
|
|
|
t = MkAtomTerm(AtomNil);
|
|
while (pt > tp) {
|
|
Term tm = *--pt;
|
|
#if SBA
|
|
if (tm == 0)
|
|
t = MkPairTerm((CELL)pt, t);
|
|
else
|
|
#endif
|
|
t = MkPairTerm(tm, t);
|
|
}
|
|
return (t);
|
|
}
|
|
|
|
int
|
|
Yap_GetName(char *s, UInt max, Term t)
|
|
{
|
|
register Term Head;
|
|
register Int i;
|
|
|
|
if (IsVarTerm(t) || !IsPairTerm(t))
|
|
return FALSE;
|
|
while (IsPairTerm(t)) {
|
|
Head = HeadOfTerm(t);
|
|
if (!IsNumTerm(Head))
|
|
return (FALSE);
|
|
i = IntOfTerm(Head);
|
|
if (i < 0 || i > MAX_ISO_LATIN1)
|
|
return FALSE;
|
|
*s++ = i;
|
|
t = TailOfTerm(t);
|
|
if (--max == 0) {
|
|
Yap_Error(FATAL_ERROR,t,"not enough space for GetName");
|
|
}
|
|
}
|
|
*s = '\0';
|
|
return TRUE;
|
|
}
|
|
|
|
#ifdef SFUNC
|
|
|
|
Term
|
|
MkSFTerm(Functor f, int n, Term *a, empty_value)
|
|
{
|
|
Term t, p = AbsAppl(H);
|
|
int i;
|
|
|
|
*H++ = f;
|
|
RESET_VARIABLE(H);
|
|
++H;
|
|
for (i = 1; i <= n; ++i) {
|
|
t = Derefa(a++);
|
|
if (t != empty_value) {
|
|
*H++ = i;
|
|
*H++ = t;
|
|
}
|
|
}
|
|
*H++ = 0;
|
|
return (p);
|
|
}
|
|
|
|
CELL *
|
|
ArgsOfSFTerm(Term t)
|
|
{
|
|
CELL *p = RepAppl(t) + 1;
|
|
|
|
while (*p != (CELL) p)
|
|
p = CellPtr(*p) + 1;
|
|
return (p + 1);
|
|
}
|
|
|
|
#endif
|
|
|
|
long
|
|
Yap_NewSlots(int n)
|
|
{
|
|
Int old_slots = IntOfTerm(ASP[0]), oldn = n;
|
|
while (n > 0) {
|
|
RESET_VARIABLE(ASP);
|
|
ASP--;
|
|
n--;
|
|
}
|
|
ASP[0] = MkIntTerm(old_slots+oldn);
|
|
return((ASP+1)-LCL0);
|
|
}
|
|
|
|
long
|
|
Yap_InitSlot(Term t)
|
|
{
|
|
Int old_slots = IntOfTerm(ASP[0]);
|
|
*ASP = t;
|
|
ASP--;
|
|
ASP[0] = MkIntTerm(old_slots+1);
|
|
return((ASP+1)-LCL0);
|
|
}
|
|
|
|
int
|
|
Yap_RecoverSlots(int n)
|
|
{
|
|
Int old_slots = IntOfTerm(ASP[0]);
|
|
if (old_slots - n < 0) {
|
|
return FALSE;
|
|
}
|
|
ASP += n;
|
|
ASP[0] = MkIntTerm(old_slots-n);
|
|
return TRUE;
|
|
}
|
|
|
|
Term
|
|
Yap_GetFromSlot(long slot)
|
|
{
|
|
return(Deref(LCL0[slot]));
|
|
}
|
|
|
|
Term
|
|
Yap_GetPtrFromSlot(long slot)
|
|
{
|
|
return(LCL0[slot]);
|
|
}
|
|
|
|
Term *
|
|
Yap_AddressFromSlot(long slot)
|
|
{
|
|
return(LCL0+slot);
|
|
}
|
|
|
|
void
|
|
Yap_PutInSlot(long slot, Term t)
|
|
{
|
|
LCL0[slot] = t;
|
|
}
|
|
|
|
static HoldEntry *
|
|
InitAtomHold(void)
|
|
{
|
|
HoldEntry *x = (HoldEntry *)Yap_AllocAtomSpace(sizeof(struct hold_entry));
|
|
if (x == NULL) {
|
|
return NULL;
|
|
}
|
|
x->KindOfPE = HoldProperty;
|
|
x->NextOfPE = NIL;
|
|
x->RefsOfPE = 1;
|
|
return x;
|
|
}
|
|
|
|
int
|
|
Yap_AtomIncreaseHold(Atom at)
|
|
{
|
|
AtomEntry *ae = RepAtom(at);
|
|
HoldEntry *pp;
|
|
Prop *opp = &(ae->PropsOfAE);
|
|
|
|
WRITE_LOCK(ae->ARWLock);
|
|
pp = RepHoldProp(ae->PropsOfAE);
|
|
while (!EndOfPAEntr(pp)
|
|
&& pp->KindOfPE != HoldProperty) {
|
|
opp = &(pp->NextOfPE);
|
|
pp = RepHoldProp(pp->NextOfPE);
|
|
}
|
|
if (!pp) {
|
|
HoldEntry *new = InitAtomHold();
|
|
if (!new) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return FALSE;
|
|
}
|
|
*opp = AbsHoldProp(new);
|
|
} else {
|
|
pp->RefsOfPE++;
|
|
}
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return TRUE;
|
|
}
|
|
|
|
int
|
|
Yap_AtomDecreaseHold(Atom at)
|
|
{
|
|
AtomEntry *ae = RepAtom(at);
|
|
HoldEntry *pp;
|
|
Prop *opp = &(ae->PropsOfAE);
|
|
|
|
WRITE_LOCK(ae->ARWLock);
|
|
pp = RepHoldProp(ae->PropsOfAE);
|
|
while (!EndOfPAEntr(pp)
|
|
&& pp->KindOfPE != HoldProperty) {
|
|
opp = &(pp->NextOfPE);
|
|
pp = RepHoldProp(pp->NextOfPE);
|
|
}
|
|
if (!pp) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return FALSE;
|
|
}
|
|
pp->RefsOfPE--;
|
|
if (!pp->RefsOfPE) {
|
|
*opp = pp->NextOfPE;
|
|
Yap_FreeCodeSpace((ADDR)pp);
|
|
}
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return TRUE;
|
|
}
|
|
|