diogo/yap-6.3
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clause should not do write locking

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expand_index should not care whether read_locks are held.


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@996 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
This commit is contained in:
vsc 2004-02-18 01:43:32 +00:00
parent 6031b7f049
commit d3f49b75df
3 changed files with 71 additions and 69 deletions
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33
C/absmi.c
View File

@ -1105,9 +1105,6 @@ Yap_absmi(int inp)
saveregs();
{
yamop *ipc;
#if defined(YAPOR) || defined(THREADS)
PredEntry *ap = PP;
#endif
/* update ASP before calling IPred */
ASP = YREG+E_CB;
@ -1115,19 +1112,20 @@ Yap_absmi(int inp)
ASP = (CELL *) B;
}
#if defined(YAPOR) || defined(THREADS)
READ_UNLOCK(ap->PRWLock);
PP = NULL;
LOCK(pe->PELock);
if (*PREG_ADDR != PREG) {
PREG = *PREG_ADDR;
UNLOCK(pe->PELock);
JMPNext();
}
#endif
ipc = Yap_CleanUpIndex(PREG->u.Ill.I);
READ_UNLOCK(pe->PRWLock);
/* restart index */
setregs();
PREG = ipc;
if (PREG == NULL) FAIL();
CACHED_A1() = ARG1;
#if defined(YAPOR) || defined(THREADS)
PP = ap;
READ_LOCK(ap->PRWLock);
#endif
JMPNext();
}
ENDBOp();
@ -6361,28 +6359,17 @@ Yap_absmi(int inp)
}
saveregs();
#if defined(YAPOR) || defined(THREADS)
if (PP != pe) {
READ_LOCK(pe->PRWLock);
}
LOCK(pe->PELock);
if (*PREG_ADDR != (yamop *)&(pe->cs.p_code.ExpandCode)) {
pt0 = *PREG_ADDR;
if (*PREG_ADDR != PREG)) {
PREG = *PREG_ADDR;
UNLOCK(pe->PELock);
if (PP != pe) {
READ_UNLOCK(pe->PRWLock);
}
JMPNext();
}
#endif
pt0 = Yap_ExpandIndex(pe);
/* restart index */
setregs();
UNLOCK(pe->PELock);
#if defined(YAPOR) || defined(THREADS)
if (PP != pe) {
READ_UNLOCK(pe->PRWLock);
}
#endif
setregs();
PREG = pt0;
JMPNext();
}

63
C/cdmgr.c
View File

@ -3051,10 +3051,7 @@ fetch_next_lu_clause(PredEntry *pe, yamop *i_code, Term th, Term tb, Term tr, ya
cl = Yap_FollowIndexingCode(pe, i_code, th, tb, tr, NEXTOP(PredLogUpdClause->CodeOfPred,ld), cp_ptr);
if (cl == NULL) {
#if defined(YAPOR) || defined(THREADS)
WPP = NULL;
#endif
WRITE_UNLOCK(pe->PRWLock);
READ_UNLOCK(pe->PRWLock);
return FALSE;
}
rtn = MkDBRefTerm((DBRef)cl);
@ -3069,10 +3066,7 @@ fetch_next_lu_clause(PredEntry *pe, yamop *i_code, Term th, Term tb, Term tr, ya
TRAIL_CLREF(cl); /* So that fail will erase it */
}
#endif
#if defined(YAPOR) || defined(THREADS)
WPP = NULL;
#endif
WRITE_UNLOCK(pe->PRWLock);
READ_UNLOCK(pe->PRWLock);
if (cl->ClFlags & FactMask) {
if (!Yap_unify(tb, MkAtomTerm(AtomTrue)) ||
!Yap_unify(tr, rtn))
@ -3128,10 +3122,7 @@ p_log_update_clause(void)
pe = get_pred(t1, Deref(ARG2), "clause/3");
if (pe == NULL || EndOfPAEntr(pe))
return FALSE;
WRITE_LOCK(pe->PRWLock);
#if defined(YAPOR) || defined(THREADS)
WPP = pe;
#endif
READ_LOCK(pe->PRWLock);
if(pe->OpcodeOfPred == INDEX_OPCODE) {
IPred(pe);
}
@ -3144,10 +3135,7 @@ p_continue_log_update_clause(void)
PredEntry *pe = (PredEntry *)IntegerOfTerm(Deref(ARG1));
yamop *ipc = (yamop *)IntegerOfTerm(ARG2);
WRITE_LOCK(pe->PRWLock);
#if defined(YAPOR) || defined(THREADS)
WPP = pe;
#endif
READ_LOCK(pe->PRWLock);
return fetch_next_lu_clause(pe, ipc, Deref(ARG3), ARG4, ARG5, B->cp_ap, FALSE);
}
@ -3157,10 +3145,7 @@ fetch_next_lu_clause0(PredEntry *pe, yamop *i_code, Term th, Term tb, yamop *cp_
LogUpdClause *cl;
cl = Yap_FollowIndexingCode(pe, i_code, th, tb, TermNil, NEXTOP(PredLogUpdClause0->CodeOfPred,ld), cp_ptr);
#if defined(YAPOR) || defined(THREADS)
WPP = NULL;
#endif
WRITE_UNLOCK(pe->PRWLock);
READ_UNLOCK(pe->PRWLock);
if (cl == NULL) {
return FALSE;
}
@ -3217,10 +3202,7 @@ p_log_update_clause0(void)
pe = get_pred(t1, Deref(ARG2), "clause/3");
if (pe == NULL || EndOfPAEntr(pe))
return FALSE;
WRITE_LOCK(pe->PRWLock);
#if defined(YAPOR) || defined(THREADS)
WPP = pe;
#endif
READ_LOCK(pe->PRWLock);
if(pe->OpcodeOfPred == INDEX_OPCODE) {
IPred(pe);
}
@ -3233,10 +3215,7 @@ p_continue_log_update_clause0(void)
PredEntry *pe = (PredEntry *)IntegerOfTerm(Deref(ARG1));
yamop *ipc = (yamop *)IntegerOfTerm(ARG2);
WRITE_LOCK(pe->PRWLock);
#if defined(YAPOR) || defined(THREADS)
WPP = pe;
#endif
READ_LOCK(pe->PRWLock);
return fetch_next_lu_clause0(pe, ipc, Deref(ARG3), ARG4, B->cp_ap, FALSE);
}
@ -3247,7 +3226,6 @@ fetch_next_static_clause(PredEntry *pe, yamop *i_code, Term th, Term tb, Term tr
Term rtn;
cl = (StaticClause *)Yap_FollowIndexingCode(pe, i_code, th, tb, tr, NEXTOP(PredStaticClause->CodeOfPred,ld), cp_ptr);
WRITE_UNLOCK(pe->PRWLock);
if (cl == NULL)
return FALSE;
rtn = MkDBRefTerm((DBRef)cl);
@ -3305,7 +3283,6 @@ p_static_clause(void)
pe = get_pred(t1, Deref(ARG2), "clause/3");
if (pe == NULL || EndOfPAEntr(pe))
return FALSE;
WRITE_LOCK(pe->PRWLock);
if(pe->OpcodeOfPred == INDEX_OPCODE) {
IPred(pe);
}
@ -3327,14 +3304,21 @@ p_nth_clause(void)
pe = get_pred(t1, Deref(ARG2), "clause/3");
if (pe == NULL || EndOfPAEntr(pe))
return FALSE;
WRITE_LOCK(pe->PRWLock);
#if defined(YAPOR) || defined(THREADS)
WPP = pe;
#endif
if (!(pe->PredFlags & (SourcePredFlag|LogUpdatePredFlag))) {
if(pe->OpcodeOfPred == INDEX_OPCODE) {
WRITE_LOCK(pe->PRWLock);
if(pe->OpcodeOfPred == INDEX_OPCODE) {
IPred(pe);
}
WRITE_UNLOCK(pe->PRWLock);
}
READ_LOCK(pe->PRWLock);
if (!(pe->PredFlags & (SourcePredFlag|LogUpdatePredFlag))) {
READ_UNLOCK(pe->PRWLock);
return FALSE;
}
if (pe->PredFlags & SourcePredFlag) {
READ_UNLOCK(pe->PRWLock);
}
/* in case we have to index or to expand code */
if (pe->ModuleOfPred != IDB_MODULE) {
UInt i;
@ -3345,11 +3329,11 @@ p_nth_clause(void)
} else {
XREGS[2] = MkVarTerm();
}
if(pe->OpcodeOfPred == INDEX_OPCODE) {
IPred(pe);
}
cl = Yap_NthClause(pe, ncls);
if (cl == NULL)
if (pe->PredFlags & LogUpdatePredFlag) {
READ_UNLOCK(pe->PRWLock);
}
if (cl == NULL)
return FALSE;
if (cl->ClFlags & LogUpdatePredFlag) {
#if defined(YAPOR) || defined(THREADS)
@ -3373,7 +3357,6 @@ p_continue_static_clause(void)
PredEntry *pe = (PredEntry *)IntegerOfTerm(Deref(ARG1));
yamop *ipc = (yamop *)IntegerOfTerm(ARG2);
WRITE_LOCK(pe->PRWLock);
return fetch_next_static_clause(pe, ipc, Deref(ARG3), ARG4, ARG5, B->cp_ap, FALSE);
}

44
C/index.c
View File

@ -6382,6 +6382,14 @@ Yap_FollowIndexingCode(PredEntry *ap, yamop *ipc, Term t1, Term tb, Term tr, yam
ipc = NEXTOP(ipc,l);
break;
case _stale_lu_index:
#if defined(YAPOR) || defined(THREADS)
LOCK(ap->PELock);
if (*jbl != ipc) {
ipc = *jbl;
UNLOCK(ap->PELock);
break;
}
#endif
while (TRUE) {
yamop *nipc = clean_up_index(ipc->u.Ill.I, jlbl, ap);
if (nipc == NULL) {
@ -6391,6 +6399,7 @@ Yap_FollowIndexingCode(PredEntry *ap, yamop *ipc, Term t1, Term tb, Term tr, yam
H[2] = tr;
H += 3;
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
UNLOCK(ap->PELock);
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return NULL;
}
@ -6399,6 +6408,7 @@ Yap_FollowIndexingCode(PredEntry *ap, yamop *ipc, Term t1, Term tb, Term tr, yam
tb = H[1];
tr = H[2];
} else {
UNLOCK(ap->PELock);
ipc = nipc;
break;
}
@ -6574,7 +6584,16 @@ Yap_FollowIndexingCode(PredEntry *ap, yamop *ipc, Term t1, Term tb, Term tr, yam
}
break;
case _expand_index:
#if defined(YAPOR) || defined(THREADS)
LOCK(ap->PELock);
if (*jbl != ipc) {
ipc = *jbl;
UNLOCK(ap->PELock);
break;
}
#endif
ipc = ExpandIndex(ap);
UNLOCK(pe->PELock);
break;
case _op_fail:
/*
@ -6629,12 +6648,6 @@ Yap_FollowIndexingCode(PredEntry *ap, yamop *ipc, Term t1, Term tb, Term tr, yam
abolish_incomplete_subgoals(B);
#endif /* TABLING */
}
#if defined(YAPOR) || defined(THREADS)
if (PP == ap) {
PP = NULL;
READ_UNLOCK(ap->PRWLock);
}
#endif
return NULL;
}
@ -6736,15 +6749,25 @@ Yap_NthClause(PredEntry *ap, Int ncls)
case _trust_logical_pred:
ipc = NEXTOP(ipc,l);
case _stale_lu_index:
#if defined(YAPOR) || defined(THREADS)
LOCK(ap->PELock);
if (*jbl != ipc) {
ipc = *jbl;
UNLOCK(ap->PELock);
break;
}
#endif
while (TRUE) {
yamop *nipc = clean_up_index(ipc->u.Ill.I, jlbl, ap);
if (nipc == NULL) {
/* not enough space */
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
UNLOCK(ap->PELock);
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return NULL;
}
} else {
UNLOCK(ap->PELock);
ipc = nipc;
break;
}
@ -6789,7 +6812,16 @@ Yap_NthClause(PredEntry *ap, Int ncls)
ipc = ipc->u.clll.l3;
break;
case _expand_index:
#if defined(YAPOR) || defined(THREADS)
LOCK(ap->PELock);
if (*jbl != (yamop *)&(ap->cs.p_code.ExpandCode)) {
ipc = *jbl;
UNLOCK(pe->PELock);
break;
}
#endif
ipc = ExpandIndex(ap);
UNLOCK(ap->PELock);
break;
case _op_fail:
ipc = alt;