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fdaae10887
yap-6.3/C/exec.c
vsc 5c2e06ad50 write_depth/3 
overflow handlings and garbage collection
Several ipdates to CLPBN
dif/2 could be broken in the presence of attributed variables.


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1474 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2005-12-05 17:16:12 +00:00

1851 lines
44 KiB
C
Raw Blame History

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: exec.c *
* Last rev: 8/2/88 *
* mods: *
* comments: Execute Prolog code *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "@(#)cdmgr.c 1.1 05/02/98";
#endif
#include "absmi.h"
#include "yapio.h"
#ifdef CUT_C
#include "cut_c.h"
#endif
STATIC_PROTO(Int CallPredicate, (PredEntry *, choiceptr, yamop *));
STATIC_PROTO(Int EnterCreepMode, (Term, Term));
STATIC_PROTO(Int p_save_cp, (void));
STATIC_PROTO(Int p_execute, (void));
STATIC_PROTO(Int p_execute0, (void));
static Term
cp_as_integer(choiceptr cp)
{
return(MkIntegerTerm(LCL0-(CELL *)cp));
}
static choiceptr
cp_from_integer(Term cpt)
{
return (choiceptr)(LCL0-(CELL *)IntegerOfTerm(cpt));
}
Term
Yap_cp_as_integer(choiceptr cp)
{
return cp_as_integer(cp);
}
static inline Int
CallPredicate(PredEntry *pen, choiceptr cut_pt, yamop *code) {
#ifdef LOW_LEVEL_TRACER
if (Yap_do_low_level_trace)
low_level_trace(enter_pred,pen,XREGS+1);
#endif /* LOW_LEVEL_TRACE */
READ_LOCK(pen->PRWLock);
#ifdef DEPTH_LIMIT
if (DEPTH <= MkIntTerm(1)) {/* I assume Module==0 is prolog */
if (pen->ModuleOfPred) {
if (DEPTH == MkIntTerm(0)) {
READ_UNLOCK(pen->PRWLock);
return FALSE;
}
else DEPTH = RESET_DEPTH();
}
} else if (pen->ModuleOfPred)
DEPTH -= MkIntConstant(2);
#endif /* DEPTH_LIMIT */
CP = P;
P = code;
/* vsc: increment reduction counter at meta-call entry */
READ_UNLOCK(pen->PRWLock);
if (pen->PredFlags & ProfiledPredFlag) {
LOCK(pen->StatisticsForPred.lock);
pen->StatisticsForPred.NOfEntries++;
UNLOCK(pen->StatisticsForPred.lock);
}
ENV = YENV;
YENV = ASP;
YENV[E_CB] = (CELL) cut_pt;
return (TRUE);
}
inline static Int
CallMetaCall(Term mod) {
ARG2 = cp_as_integer(B); /* p_save_cp */
ARG3 = ARG1;
if (mod) {
ARG4 = mod;
} else {
ARG4 = TermProlog;
}
return (CallPredicate(PredMetaCall, B, PredMetaCall->CodeOfPred));
}
Term
Yap_ExecuteCallMetaCall(Term mod) {
Term ts[4];
ts[0] = ARG1;
ts[1] = cp_as_integer(B); /* p_save_cp */
ts[2] = ARG1;
ts[3] = mod;
return(Yap_MkApplTerm(PredMetaCall->FunctorOfPred,4,ts));
}
static Int
CallError(yap_error_number err, Term mod)
{
if (yap_flags[LANGUAGE_MODE_FLAG] == 1) {
return(CallMetaCall(mod));
} else {
Yap_Error(err, ARG1, "call/1");
return(FALSE);
}
}
static Int
p_save_cp(void)
{
Term t = Deref(ARG1);
Term td;
#if SHADOW_HB
register CELL *HBREG = HB;
#endif
if (!IsVarTerm(t)) return(FALSE);
td = cp_as_integer(B);
BIND((CELL *)t,td,bind_save_cp);
#ifdef COROUTINING
DO_TRAIL(CellPtr(t), td);
if (CellPtr(t) < H0) Yap_WakeUp((CELL *)t);
bind_save_cp:
#endif
return(TRUE);
}
inline static Int
do_execute(Term t, Term mod)
{
/* first do predicate expansion, even before you process signals.
This way you don't get to spy goal_expansion(). */
if (PRED_GOAL_EXPANSION_ALL) {
LOCK(SignalLock);
/* disable creeping when we do goal expansion */
if (ActiveSignals & YAP_CREEP_SIGNAL) {
ActiveSignals &= ~YAP_CREEP_SIGNAL;
CreepFlag = CalculateStackGap();
}
UNLOCK(SignalLock);
return CallMetaCall(mod);
} else if (ActiveSignals) {
return EnterCreepMode(t, mod);
}
restart_exec:
if (IsVarTerm(t)) {
return CallError(INSTANTIATION_ERROR, mod);
} else if (IsApplTerm(t)) {
register Functor f = FunctorOfTerm(t);
register CELL *pt;
PredEntry *pen;
unsigned int i, arity;
f = FunctorOfTerm(t);
if (IsExtensionFunctor(f)) {
return CallError(TYPE_ERROR_CALLABLE, mod);
}
arity = ArityOfFunctor(f);
pen = RepPredProp(PredPropByFunc(f, mod));
/* You thought we would be over by now */
/* but no meta calls require special preprocessing */
if (pen->PredFlags & (GoalExPredFlag|MetaPredFlag)) {
if (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = tmod;
t = ArgOfTerm(2,t);
goto restart_exec;
}
} else {
return(CallMetaCall(mod));
}
}
/* now let us do what we wanted to do from the beginning !! */
/* 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
}
return (CallPredicate(pen, B, pen->CodeOfPred));
} else if (IsAtomTerm(t)) {
PredEntry *pe;
Atom a = AtomOfTerm(t);
if (a == AtomTrue || a == AtomOtherwise || a == AtomCut)
return(TRUE);
else if (a == AtomFail || a == AtomFalse)
return(FALSE);
/* call may not define new system predicates!! */
pe = RepPredProp(PredPropByAtom(a, mod));
return (CallPredicate(pe, B, pe->CodeOfPred));
} else if (IsIntTerm(t)) {
return CallError(TYPE_ERROR_CALLABLE, mod);
} else {
/* Is Pair Term */
return(CallMetaCall(mod));
}
}
static Term
copy_execn_to_heap(Functor f, CELL *pt, unsigned int n, unsigned int arity, Term mod)
{
CELL *h0 = H;
Term tf;
unsigned int i;
if (arity == 2 &&
NameOfFunctor(f) == AtomDot) {
for (i = 0; i<arity-n;i++) {
*H++ = pt[i];
}
for (i=0; i< n; i++) {
*H++ = h0[i-n];
}
tf = AbsPair(h0);
} else {
*H++ = (CELL)f;
for (i = 0; i<arity-n;i++) {
*H++ = pt[i];
}
for (i=0; i< n; i++) {
*H++ = h0[i-n];
}
tf = AbsAppl(h0);
}
if (mod != CurrentModule) {
CELL *h0 = H;
*H++ = (CELL)FunctorModule;
*H++ = mod;
*H++ = tf;
tf = AbsAppl(h0);
}
return tf;
}
inline static Int
do_execute_n(Term t, Term mod, unsigned int n)
{
Functor f;
Atom Name;
register CELL *pt;
PredEntry *pen;
unsigned int i, arity, j = -n;
restart_exec:
if (IsVarTerm(t)) {
return CallError(INSTANTIATION_ERROR, mod);
} else if (IsAtomTerm(t)) {
arity = n;
Name = AtomOfTerm(t);
pt = NULL;
} else if (IsIntTerm(t)) {
return CallError(TYPE_ERROR_CALLABLE, mod);
} else if (IsPairTerm(t)) {
arity = n+2;
pt = RepPair(t);
Name = AtomOfTerm(TermNil);
} else /* if (IsApplTerm(t)) */ {
f = FunctorOfTerm(t);
while (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = tmod;
t = ArgOfTerm(2,t);
goto restart_exec;
}
}
arity = ArityOfFunctor(f)+n;
Name = NameOfFunctor(f);
pt = RepAppl(t)+1;
}
f = Yap_MkFunctor(Name,arity);
if (IsExtensionFunctor(f)) {
return CallError(TYPE_ERROR_CALLABLE, mod);
}
arity = ArityOfFunctor(f);
if (PRED_GOAL_EXPANSION_ALL) {
LOCK(SignalLock);
/* disable creeping when we do goal expansion */
if (ActiveSignals & YAP_CREEP_SIGNAL) {
ActiveSignals &= ~YAP_CREEP_SIGNAL;
CreepFlag = CalculateStackGap();
}
UNLOCK(SignalLock);
ARG1 = copy_execn_to_heap(f, pt, n, arity, mod);
return CallMetaCall(mod);
} else if (ActiveSignals) {
return EnterCreepMode(copy_execn_to_heap(f, pt, n, arity, CurrentModule), mod);
}
pen = RepPredProp(PredPropByFunc(f, mod));
/* You thought we would be over by now */
/* but no meta calls require special preprocessing */
if (pen->PredFlags & (GoalExPredFlag|MetaPredFlag)) {
ARG1 = copy_execn_to_heap(f, pt, n, arity, mod);
return(CallMetaCall(mod));
}
/* now let us do what we wanted to do from the beginning !! */
/* I cannot use the standard macro here because
otherwise I would dereference the argument and
might skip a svar */
for (i = 1; i <= arity-n; i++) {
#if SBA
Term d0 = *pt++;
if (d0 == 0)
XREGS[i] = (CELL)(pt-1);
else
XREGS[i] = d0;
#else
XREGS[i] = *pt++;
#endif
}
for (i = arity-n+1; i <= arity; i++,j++) {
XREGS[i] = H[j];
}
return (CallPredicate(pen, B, pen->CodeOfPred));
}
static Int
EnterCreepMode(Term t, Term mod) {
PredEntry *PredCreep;
if (ActiveSignals & YAP_CDOVF_SIGNAL) {
ARG1 = t;
if (!Yap_growheap(FALSE, 0, NULL)) {
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, "YAP failed to grow heap at meta-call");
}
if (!ActiveSignals) {
return do_execute(ARG1, mod);
}
}
PredCreep = RepPredProp(PredPropByFunc(FunctorCreep,1));
if (mod) {
ARG1 = MkPairTerm(mod,ARG1);
} else {
ARG1 = MkPairTerm(TermProlog,ARG1);
}
LOCK(SignalLock);
CreepFlag = CalculateStackGap();
UNLOCK(SignalLock);
yap_flags[SPY_CREEP_FLAG] = TRUE;
P_before_spy = P;
return (CallPredicate(PredCreep, B, PredCreep->CodeOfPred));
}
static Int
p_execute(void)
{ /* '$execute'(Goal) */
Term t = Deref(ARG1);
return(do_execute(t, CurrentModule));
}
static void
heap_store(Term t)
{
if (IsVarTerm(t)) {
if (VarOfTerm(t) < H) {
*H++ = t;
} else {
RESET_VARIABLE(H);
Bind_Local(VarOfTerm(t), (CELL)H);
H++;
}
} else {
*H++ = t;
}
}
static Int
p_execute2(void)
{ /* '$execute'(Goal) */
Term t = Deref(ARG1);
heap_store(Deref(ARG2));
return(do_execute_n(t, CurrentModule, 1));
}
static Int
p_execute3(void)
{ /* '$execute'(Goal) */
Term t = Deref(ARG1);
heap_store(Deref(ARG2));
heap_store(Deref(ARG3));
return(do_execute_n(t, CurrentModule, 2));
}
static Int
p_execute4(void)
{ /* '$execute'(Goal) */
Term t = Deref(ARG1);
heap_store(Deref(ARG2));
heap_store(Deref(ARG3));
heap_store(Deref(ARG4));
return(do_execute_n(t, CurrentModule, 3));
}
static Int
p_execute_clause(void)
{ /* '$execute_clause'(Goal) */
Term t = Deref(ARG1);
Term mod = Deref(ARG2);
choiceptr cp = cp_from_integer(Deref(ARG4));
unsigned int arity;
Prop pe;
yamop *code;
Term clt = Deref(ARG3);
restart_exec:
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR,ARG3,"call/1");
return FALSE;
} else if (IsAtomTerm(t)) {
Atom a = AtomOfTerm(t);
pe = PredPropByAtom(a, mod);
} else if (IsApplTerm(t)) {
register Functor f = FunctorOfTerm(t);
register unsigned int i;
register CELL *pt;
if (IsExtensionFunctor(f))
return(FALSE);
if (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = tmod;
t = ArgOfTerm(2,t);
goto restart_exec;
}
}
pe = PredPropByFunc(f, mod);
arity = ArityOfFunctor(f);
/* I cannot use the standard macro here because
otherwise I would dereference the argument and
might skip a svar */
pt = RepAppl(t)+1;
for (i = 1; i <= arity; ++i) {
#if SBA
Term d0 = *pt++;
if (d0 == 0)
XREGS[i] = (CELL)(pt-1);
else
XREGS[i] = d0;
#else
XREGS[i] = *pt++;
#endif
}
} else {
Yap_Error(TYPE_ERROR_CALLABLE,ARG3,"call/1");
return FALSE;
}
/* N = arity; */
/* call may not define new system predicates!! */
if (RepPredProp(pe)->PredFlags & MegaClausePredFlag) {
code = Yap_MegaClauseFromTerm(clt);
} else {
code = Yap_ClauseFromTerm(clt)->ClCode;
}
return CallPredicate(RepPredProp(pe), cp, code);
}
static Int
p_execute_in_mod(void)
{ /* '$execute'(Goal) */
return(do_execute(Deref(ARG1), IntOfTerm(Deref(ARG2))));
}
static Int
p_execute0(void)
{ /* '$execute0'(Goal,Mod) */
Term t = Deref(ARG1);
Term mod = Deref(ARG2);
unsigned int arity;
Prop pe;
if (ActiveSignals) {
return EnterCreepMode(t, mod);
}
restart_exec:
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR,ARG3,"call/1");
return FALSE;
} else if (IsAtomTerm(t)) {
Atom a = AtomOfTerm(t);
pe = PredPropByAtom(a, mod);
} else if (IsApplTerm(t)) {
register Functor f = FunctorOfTerm(t);
register unsigned int i;
register CELL *pt;
if (IsExtensionFunctor(f))
return(FALSE);
if (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = tmod;
t = ArgOfTerm(2,t);
goto restart_exec;
}
}
pe = PredPropByFunc(f, mod);
arity = ArityOfFunctor(f);
/* I cannot use the standard macro here because
otherwise I would dereference the argument and
might skip a svar */
pt = RepAppl(t)+1;
for (i = 1; i <= arity; ++i) {
#if SBA
Term d0 = *pt++;
if (d0 == 0)
XREGS[i] = (CELL)(pt-1);
else
XREGS[i] = d0;
#else
XREGS[i] = *pt++;
#endif
}
} else {
Yap_Error(TYPE_ERROR_CALLABLE,ARG3,"call/1");
return FALSE;
}
/* N = arity; */
/* call may not define new system predicates!! */
return CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->CodeOfPred);
}
static Int
p_execute_nonstop(void)
{ /* '$execute_nonstop'(Goal,Mod) */
Term t = Deref(ARG1);
Term mod = Deref(ARG2);
unsigned int arity;
Prop pe;
restart_exec:
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR,ARG3,"call/1");
return FALSE;
} else if (IsAtomTerm(t)) {
Atom a = AtomOfTerm(t);
pe = PredPropByAtom(a, mod);
} else if (IsApplTerm(t)) {
register Functor f = FunctorOfTerm(t);
register unsigned int i;
register CELL *pt;
if (IsExtensionFunctor(f))
return(FALSE);
if (f == FunctorModule) {
Term tmod = ArgOfTerm(1,t);
if (!IsVarTerm(tmod) && IsAtomTerm(tmod)) {
mod = tmod;
t = ArgOfTerm(2,t);
goto restart_exec;
}
}
pe = PredPropByFunc(f, mod);
arity = ArityOfFunctor(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 {
Yap_Error(TYPE_ERROR_CALLABLE,ARG3,"call/1");
return FALSE;
}
/* N = arity; */
/* call may not define new system predicates!! */
if (RepPredProp(pe)->PredFlags & SpiedPredFlag) {
return CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->cs.p_code.TrueCodeOfPred);
} else {
return CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->CodeOfPred);
}
}
static Int
p_execute_0(void)
{ /* '$execute_0'(Goal) */
Term t = Deref(ARG1);
Term mod = Deref(ARG2);
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
pe = PredPropByAtom(a, mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/1");
return(FALSE);
}
pe = PredPropByFunc(f, mod);
Arity = ArityOfFunctor(f);
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,2), mod);
ptr = RepPair(t);
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_1(void)
{ /* '$execute_0'(Goal) */
Term t = Deref(ARG1);
Term mod = Deref(ARG3);
Prop pe;
if (!IsAtomTerm(t)) {
Yap_Error(TYPE_ERROR_ATOM,ARG1,"call_with_args/2");
return(FALSE);
}
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
pe = PredPropByFunc(Yap_MkFunctor(a,1),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+1), mod);
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,3), mod);
ptr = RepPair(t);
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_2(void)
{ /* '$execute_2'(Goal) */
Term t = Deref(ARG1);
Term mod = Deref(ARG4);
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
pe = PredPropByFunc(Yap_MkFunctor(a,2),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/3");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+2), mod);
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,4), mod);
ptr = RepPair(t);
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_3(void)
{ /* '$execute_3'(Goal) */
Term t = Deref(ARG1);
Term mod = 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, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_4(void)
{ /* '$execute_4'(Goal) */
Term t = Deref(ARG1);
Term mod = Deref(ARG6);
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
pe = PredPropByFunc(Yap_MkFunctor(a,4),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/5");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+4), mod);
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,6), mod);
ptr = RepPair(t);
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_5(void)
{ /* '$execute_5'(Goal) */
Term t = Deref(ARG1);
Term mod = 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, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_6(void)
{ /* '$execute_6'(Goal) */
Term t = Deref(ARG1);
Term mod = Deref(ARG8);
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
ARG5 = ARG6;
ARG6 = ARG7;
pe = PredPropByFunc(Yap_MkFunctor(a,6),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/7");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+6), mod);
XREGS[Arity+6] = ARG7;
XREGS[Arity+5] = ARG6;
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,8), mod);
ptr = RepPair(t);
XREGS[8] = ARG7;
XREGS[7] = ARG6;
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_7(void)
{ /* '$execute_7'(Goal) */
Term t = Deref(ARG1);
Term mod = 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, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_8(void)
{ /* '$execute_8'(Goal) */
Term t = Deref(ARG1);
Term mod = Deref(ARG10);
Prop pe;
if (IsAtomTerm(t)) {
Atom a;
a = AtomOfTerm(t);
ARG1 = ARG2;
ARG2 = ARG3;
ARG3 = ARG4;
ARG4 = ARG5;
ARG5 = ARG6;
ARG6 = ARG7;
ARG7 = ARG8;
ARG8 = ARG9;
pe = PredPropByFunc(Yap_MkFunctor(a,8),mod);
} else if (IsApplTerm(t)) {
Functor f = FunctorOfTerm(t);
Int Arity, i;
Atom a;
CELL *ptr;
if (IsExtensionFunctor(f)) {
Yap_Error(TYPE_ERROR_CALLABLE, t, "call_with_args/9");
return(FALSE);
}
Arity = ArityOfFunctor(f);
a = NameOfFunctor(f);
pe = PredPropByFunc(Yap_MkFunctor(a,Arity+8), mod);
XREGS[Arity+8] = ARG9;
XREGS[Arity+7] = ARG8;
XREGS[Arity+6] = ARG7;
XREGS[Arity+5] = ARG6;
XREGS[Arity+4] = ARG5;
XREGS[Arity+3] = ARG4;
XREGS[Arity+2] = ARG3;
XREGS[Arity+1] = ARG2;
ptr = RepAppl(t)+1;
for (i=1;i<=Arity;i++) {
XREGS[i] = *ptr++;
}
} else {
CELL *ptr;
pe = PredPropByFunc(Yap_MkFunctor(AtomDot,10), mod);
ptr = RepPair(t);
XREGS[10] = ARG9;
XREGS[9] = ARG8;
XREGS[8] = ARG7;
XREGS[7] = ARG6;
XREGS[6] = ARG5;
XREGS[5] = ARG4;
XREGS[4] = ARG3;
XREGS[3] = ARG2;
XREGS[1] = ptr[0];
XREGS[2] = ptr[1];
}
return (CallPredicate(RepPredProp(pe), B, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_9(void)
{ /* '$execute_9'(Goal) */
Term t = Deref(ARG1);
Term mod = 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, RepPredProp(pe)->CodeOfPred));
}
static Int
p_execute_10(void)
{ /* '$execute_10'(Goal) */
Term t = Deref(ARG1);
Term mod = 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, RepPredProp(pe)->CodeOfPred));
}
#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
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 Term
do_goal(Term t, yamop *CodeAdr, int arity, CELL *pt, int top)
{
choiceptr saved_b = B;
Term out = 0L;
/* create an initial pseudo environment so that when garbage
collection is going up in the environment chain it doesn't get
confused */
EX = 0L;
// sl = Yap_InitSlot(t);
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;
#if defined(YAPOR) || defined(THREADS)
WPP = NULL;
#endif
YENV[E_CB] = Unsigned (B);
P = (yamop *) CodeAdr;
CP = YESCODE;
S = CellPtr (RepPredProp (PredPropByFunc (Yap_MkFunctor(AtomCall, 1),0))); /* A1 mishaps */
out = exec_absmi(top);
// if (out) {
// out = Yap_GetFromSlot(sl);
// }
// Yap_RecoverSlots(1);
return out;
}
int
Yap_exec_absmi(int top)
{
return exec_absmi(top);
}
Int
Yap_execute_goal(Term t, int nargs, Term 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(t, CodeAdr, 0, pt, FALSE);
} else {
Functor f = FunctorOfTerm(t);
CodeAdr = RepPredProp (pe)->CodeOfPred;
READ_UNLOCK(ppe->PRWLock);
out = do_goal(t, CodeAdr, ArityOfFunctor(f), pt, FALSE);
}
if (out == 1) {
choiceptr cut_B, old_B;
/* we succeeded, let's prune */
/* restore the old environment */
/* get to previous environment */
cut_B = (choiceptr)ENV[E_CB];
#ifdef CUT_C
{
/* Note that
cut_B == (choiceptr)ENV[E_CB] */
while (POP_CHOICE_POINT(ENV[E_CB]))
{
POP_EXECUTE();
}
}
#endif /* CUT_C */
#ifdef YAPOR
CUT_prune_to(cut_B);
#endif /* YAPOR */
#ifdef TABLING
if (B != cut_B) {
while (B->cp_b < cut_B) {
B = B->cp_b;
}
abolish_incomplete_subgoals(B);
}
#endif /* TABLING */
B = cut_B;
/* find out where we have the old arguments */
old_B = ((choiceptr)(ENV-(EnvSizeInCells+nargs+1)))-1;
CP = saved_cp;
P = saved_p;
ASP = ENV;
Yap_StartSlots();
#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);
}
}
Term
Yap_RunTopGoal(Term t)
{
yamop *CodeAdr;
Prop pe;
PredEntry *ppe;
CELL *pt;
UInt arity;
Term mod = CurrentModule;
Term 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 = 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) {
/* we must always start the emulator with Prolog code */
return FALSE;
}
READ_LOCK(ppe->PRWLock);
CodeAdr = ppe->CodeOfPred;
READ_UNLOCK(ppe->PRWLock);
#if !USE_SYSTEM_MALLOC
if (Yap_TrailTop - HeapTop < 2048) {
Yap_PrologMode = BootMode;
Yap_Error(OUT_OF_TRAIL_ERROR,TermNil,
"unable to boot because of too little Trail space");
}
#endif
goal_out = do_goal(t, 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
#ifdef CUT_C
{
while (POP_CHOICE_POINT(pt0))
{
POP_EXECUTE();
}
}
#endif /* CUT_C */
#ifdef YAPOR
CUT_prune_to(pt0);
#endif /* YAPOR */
/* find where to cut to */
if (pt0 > B) {
/* Wow, we're gonna cut!!! */
#ifdef TABLING
while (B->cp_b < pt0) {
B = B->cp_b;
}
abolish_incomplete_subgoals(B);
#endif /* TABLING */
B = pt0;
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,l),
*catchpos = NEXTOP(PredHandleThrow->cs.p_code.TrueCodeOfPred,l);
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! */
UncaughtThrow = TRUE;
B->cp_h = H;
EX = t;
return FALSE;
}
B = B->cp_b;
}
/* uncaught throw */
if (B == NULL) {
UncaughtThrow = TRUE;
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,l);
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
if (B != B0) {
while (B0->cp_b < B) {
B0 = B0->cp_b;
}
abolish_incomplete_subgoals(B0);
}
#endif /* TABLING */
return FALSE;
}
Int
Yap_JumpToEnv(Term t) {
if (Yap_PrologMode & BootMode) {
return FALSE;
}
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 = 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 */
Yap_StartSlots();
#if COROUTINING
RESET_VARIABLE((CELL *)Yap_GlobalBase);
DelayedVars = Yap_NewTimedVar(MkIntTerm(0));
WokenGoals = Yap_NewTimedVar(TermNil);
AttsMutableList = Yap_NewTimedVar(MkIntTerm(0));
#endif
GcGeneration = Yap_NewTimedVar(MkIntTerm(0));
#if defined(YAPOR) || defined(THREADS)
PP = NULL;
WPP = NULL;
PREG_ADDR = NULL;
#endif
}
static Int
p_uncaught_throw(void)
{
Int out = UncaughtThrow;
UncaughtThrow = FALSE; /* just caught it */
return out;
}
void
Yap_InitExecFs(void)
{
Yap_InitComma();
Yap_InitCPred("$execute", 1, p_execute, HiddenPredFlag);
Yap_InitCPred("$execute", 2, p_execute2, HiddenPredFlag);
Yap_InitCPred("$execute", 3, p_execute3, HiddenPredFlag);
Yap_InitCPred("$execute", 4, p_execute4, HiddenPredFlag);
Yap_InitCPred("$execute_in_mod", 2, p_execute_in_mod, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 2, p_execute_0, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 3, p_execute_1, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 4, p_execute_2, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 5, p_execute_3, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 6, p_execute_4, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 7, p_execute_5, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 8, p_execute_6, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 9, p_execute_7, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 10, p_execute_8, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 11, p_execute_9, HiddenPredFlag);
Yap_InitCPred("$call_with_args", 12, p_execute_10, HiddenPredFlag);
#ifdef DEPTH_LIMIT
Yap_InitCPred("$execute_under_depth_limit", 2, p_execute_depth_limit, HiddenPredFlag);
#endif
Yap_InitCPred("$execute0", 2, p_execute0, HiddenPredFlag);
Yap_InitCPred("$execute_nonstop", 2, p_execute_nonstop, HiddenPredFlag);
Yap_InitCPred("$execute_clause", 4, p_execute_clause, HiddenPredFlag);
Yap_InitCPred("$save_current_choice_point", 1, p_save_cp, HiddenPredFlag);
Yap_InitCPred("$pred_goal_expansion_on", 0, p_pred_goal_expansion_on, SafePredFlag|HiddenPredFlag);
Yap_InitCPred("$restore_regs", 1, p_restore_regs, SafePredFlag|HiddenPredFlag);
Yap_InitCPred("$restore_regs", 2, p_restore_regs2, SafePredFlag|HiddenPredFlag);
Yap_InitCPred("$clean_ifcp", 1, p_clean_ifcp, SafePredFlag|HiddenPredFlag);
Yap_InitCPred("$jump_env_and_store_ball", 1, p_jump_env, HiddenPredFlag);
Yap_InitCPred("$generate_pred_info", 4, p_generate_pred_info, HiddenPredFlag);
Yap_InitCPred("$uncaught_throw", 0, p_uncaught_throw, HiddenPredFlag);
}
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