This repository has been archived on 2023-08-20. You can view files and clone it, but cannot push or open issues or pull requests.
yap-6.3/C/grow.c
vsc 66d14116dd improve CLP(BN)/BNT interface
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1918 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2007-08-06 14:55:43 +00:00

1614 lines
40 KiB
C

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: grow.c *
* Last rev: Thu Feb 23 1989 vv *
* mods: *
* comments: Shifting the stacks *
* *
*************************************************************************/
#include "Yap.h"
#include "Yatom.h"
#include "Heap.h"
#include "yapio.h"
#include "alloc.h"
#include "sshift.h"
#include "compile.h"
#include "attvar.h"
#ifdef CUT_C
#include "cut_c.h"
#endif /* CUT_C */
#if HAVE_STRING_H
#include <string.h>
#endif
#if !HAVE_STRNCAT
#define strncat(s0,s1,sz) strcat(s0,s1)
#endif
#if !COROUTINING
#define DelayTop() H0
#endif
static int heap_overflows = 0;
static Int total_heap_overflow_time = 0;
int stack_overflows = 0;
static Int total_stack_overflow_time = 0;
int delay_overflows = 0;
static Int total_delay_overflow_time = 0;
static int trail_overflows = 0;
static Int total_trail_overflow_time = 0;
static int atom_table_overflows = 0;
static Int total_atom_table_overflow_time = 0;
STATIC_PROTO(Int p_growheap, (void));
STATIC_PROTO(Int p_growstack, (void));
STATIC_PROTO(Int p_inform_trail_overflows, (void));
STATIC_PROTO(Int p_inform_heap_overflows, (void));
STATIC_PROTO(Int p_inform_stack_overflows, (void));
/* #define undf7 */
/* #define undf5 */
STATIC_PROTO(int growstack, (long));
STATIC_PROTO(void MoveGlobal, (void));
STATIC_PROTO(void MoveLocalAndTrail, (void));
STATIC_PROTO(void SetHeapRegs, (void));
STATIC_PROTO(void AdjustTrail, (int));
STATIC_PROTO(void AdjustLocal, (void));
STATIC_PROTO(void AdjustGlobal, (void));
STATIC_PROTO(void AdjustGrowStack, (void));
STATIC_PROTO(int static_growheap, (long,int,struct intermediates *,tr_fr_ptr *, TokEntry **, VarEntry **));
STATIC_PROTO(void cpcellsd, (CELL *, CELL *, CELL));
STATIC_PROTO(CELL AdjustAppl, (CELL));
STATIC_PROTO(CELL AdjustPair, (CELL));
STATIC_PROTO(void AdjustStacksAndTrail, (void));
STATIC_PROTO(void AdjustRegs, (int));
static void
cpcellsd(register CELL *Dest, register CELL *Org, CELL NOf)
{
#if HAVE_MEMMOVE
memmove((void *)Dest, (void *)Org, NOf*sizeof(CELL));
#else
register Int n_of = NOf;
for (; n_of >= 0; n_of--)
*Dest++ = *Org++;
#endif
}
static void
SetHeapRegs(void)
{
#ifdef undf7
fprintf(Yap_stderr,"HeapBase = %x\tHeapTop=%x\nGlobalBase=%x\tGlobalTop=%x\nLocalBase=%x\tLocatTop=%x\n", Yap_HeapBase, HeapTop, Yap_GlobalBase, H, LCL0, ASP);
#endif
/* The old stack pointers */
OldLCL0 = LCL0;
OldASP = ASP;
OldGlobalBase = (CELL *)Yap_GlobalBase;
OldH = H;
OldH0 = H0;
OldTrailBase = Yap_TrailBase;
OldTrailTop = Yap_TrailTop;
OldTR = TR;
OldHeapBase = Yap_HeapBase;
OldHeapTop = HeapTop;
/* Adjust stack addresses */
Yap_TrailBase = TrailAddrAdjust(Yap_TrailBase);
Yap_TrailTop = TrailAddrAdjust(Yap_TrailTop);
Yap_GlobalBase = DelayAddrAdjust(Yap_GlobalBase);
Yap_LocalBase = LocalAddrAdjust(Yap_LocalBase);
#if !USE_SYSTEM_MALLOC && !USE_DL_MALLOC
AuxSp = PtoDelayAdjust(AuxSp);
AuxTop = (ADDR)PtoDelayAdjust((CELL *)AuxTop);
#endif
#if !USE_SYSTEM_MALLOC
if (HeapLim)
HeapLim = DelayAddrAdjust(HeapLim);
#endif
/* The registers pointing to one of the stacks */
if (ENV)
ENV = PtoLocAdjust(ENV);
if (ASP)
ASP = PtoLocAdjust(ASP);
if (H0)
H0 = PtoGloAdjust(H0);
if (LCL0)
LCL0 = PtoLocAdjust(LCL0);
if (H)
H = PtoGloAdjust(H);
if (HB)
HB = PtoGloAdjust(HB);
if (B)
B = ChoicePtrAdjust(B);
#ifdef CUT_C
if (Yap_REGS.CUT_C_TOP)
Yap_REGS.CUT_C_TOP = (cut_c_str_ptr)ChoicePtrAdjust((choiceptr)Yap_REGS.CUT_C_TOP);
#endif
#ifdef TABLING
if (B_FZ)
B_FZ = ChoicePtrAdjust(B_FZ);
if (BB)
BB = ChoicePtrAdjust(BB);
if (H_FZ)
H_FZ = PtoGloAdjust(H_FZ);
if (TR_FZ)
TR_FZ = PtoTRAdjust(TR_FZ);
#endif /* TABLING */
if (TR)
TR = PtoTRAdjust(TR);
if (YENV)
YENV = PtoLocAdjust(YENV);
if (IsOldGlobalPtr(S))
S = PtoGloAdjust(S);
else if (IsOldLocalPtr(S))
S = PtoLocAdjust(S);
if (GlobalArena)
GlobalArena = AbsAppl(PtoGloAdjust(RepAppl(GlobalArena)));
if (GlobalDelayArena)
GlobalDelayArena = GlobalAdjust(GlobalDelayArena);
#ifdef COROUTINING
if (DelayedVars)
DelayedVars = AbsAppl(PtoGloAdjust(RepAppl(DelayedVars)));
if (AttsMutableList)
AttsMutableList = AbsAppl(PtoGloAdjust(RepAppl(AttsMutableList)));
if (WokenGoals)
WokenGoals = AbsAppl(PtoGloAdjust(RepAppl(WokenGoals)));
#endif
GcGeneration = AbsAppl(PtoGloAdjust(RepAppl(GcGeneration)));
GcPhase = AbsAppl(PtoGloAdjust(RepAppl(GcPhase)));
}
static void
MoveLocalAndTrail(void)
{
/* cpcellsd(To,From,NOfCells) - copy the cells downwards */
#if USE_SYSTEM_MALLOC
cpcellsd(ASP, (CELL *)((char *)OldASP+DelayDiff), (CELL *)OldTR - OldASP);
#else
cpcellsd(ASP, OldASP, (CELL *)OldTR - OldASP);
#endif
}
static void
MoveGlobal(void)
{
/*
* cpcellsd(To,From,NOfCells) - copy the cells downwards - in
* absmi.asm
*/
cpcellsd((CELL *)Yap_GlobalBase, (CELL *)OldGlobalBase, OldH - (CELL *)OldGlobalBase);
}
static void
MoveExpandedGlobal(void)
{
/*
* cpcellsd(To,From,NOfCells) - copy the cells downwards - in
* absmi.asm
*/
cpcellsd((CELL *)(Yap_GlobalBase+(GDiff-DelayDiff)), (CELL *)Yap_GlobalBase, OldH - (CELL *)OldGlobalBase);
}
static void
MoveGlobalWithHole(void)
{
/*
* cpcellsd(To,From,NOfCells) - copy the cells downwards - in
* absmi.asm
*/
#if USE_SYSTEM_MALLOC
cpcellsd((CELL *)((char *)Yap_GlobalBase+(GDiff0-DelayDiff)), (CELL *)Yap_GlobalBase, OldH - (CELL *)OldGlobalBase);
#else
cpcellsd((CELL *)((char *)OldGlobalBase+GDiff0), (CELL *)OldGlobalBase, OldH - (CELL *)OldGlobalBase);
#endif
}
static void
MoveHalfGlobal(CELL *OldPt)
{
/*
* cpcellsd(To,From,NOfCells) - copy the cells downwards - in
* absmi.asm
*/
UInt diff = OldH-OldPt;
CELL *NewPt = (CELL *)((char*)OldPt+GDiff);
CELL *IntPt = (CELL *)((char*)OldPt+GDiff0);
cpcellsd(NewPt, IntPt, diff);
}
static inline CELL
AdjustAppl(register CELL t0)
{
register CELL *t = RepAppl(t0);
if (IsOldGlobalPtr(t))
return (AbsAppl(PtoGloAdjust(t)));
else if (IsOldTrailPtr(t))
return (AbsAppl(CellPtoTRAdjust(t)));
else if (IsHeapP(t))
return (AbsAppl(CellPtoHeapAdjust(t)));
#ifdef DEBUG
else {
/* strange cell */
/* fprintf(Yap_stderr,"% garbage appl %lx found in stacks by stack shifter\n", t0);*/
}
#endif
return(t0);
}
static inline CELL
AdjustPair(register CELL t0)
{
register CELL *t = RepPair(t0);
if (IsOldGlobalPtr(t))
return (AbsPair(PtoGloAdjust(t)));
if (IsOldTrailPtr(t))
return (AbsPair(CellPtoTRAdjust(t)));
else if (IsHeapP(t))
return (AbsPair(CellPtoHeapAdjust(t)));
#ifdef DEBUG
/* fprintf(Yap_stderr,"% garbage pair %lx found in stacks by stack shifter\n", t0);*/
#endif
return(t0);
}
static void
AdjustTrail(int adjusting_heap)
{
register tr_fr_ptr ptt;
ptt = TR;
/* moving the trail is simple */
while (ptt != (tr_fr_ptr)Yap_TrailBase) {
register CELL reg = TrailTerm(ptt-1);
#ifdef FROZEN_STACKS
register CELL reg2 = TrailVal(ptt-1);
#endif
ptt--;
if (IsVarTerm(reg)) {
if (IsOldLocalInTR(reg))
TrailTerm(ptt) = LocalAdjust(reg);
else if (IsOldGlobal(reg))
TrailTerm(ptt) = GlobalAdjust(reg);
else if (IsOldTrail(reg))
TrailTerm(ptt) = TrailAdjust(reg);
} else if (IsPairTerm(reg)) {
TrailTerm(ptt) = AdjustPair(reg);
#ifdef MULTI_ASSIGNMENT_VARIABLES /* does not work with new structures */
/* check it whether we are protecting a
multi-assignment */
} else if (IsApplTerm(reg)) {
TrailTerm(ptt) = AdjustAppl(reg);
#endif
}
#ifdef FROZEN_STACKS
if (IsVarTerm(reg2)) {
if (IsOldLocal(reg2))
TrailVal(ptt) = LocalAdjust(reg2);
else if (IsOldGlobal(reg2))
TrailVal(ptt) = GlobalAdjust(reg2);
else if (IsOldTrail(reg2))
TrailVal(ptt) = TrailAdjust(reg2);
} else if (IsApplTerm(reg2)) {
TrailVal(ptt) = AdjustAppl(reg2);
} else if (IsPairTerm(reg2)) {
TrailVal(ptt) = AdjustPair(reg2);
}
#endif
}
}
static void
AdjustLocal(void)
{
register CELL reg, *pt;
/* Adjusting the local */
pt = LCL0;
while (pt > ASP) {
reg = *--pt;
if (IsVarTerm(reg)) {
if (IsOldLocal(reg))
*pt = LocalAdjust(reg);
else if (IsOldGlobal(reg))
*pt = GlobalAdjust(reg);
else if (IsOldTrail(reg))
*pt = TrailAdjust(reg);
else if (IsOldCode(reg))
*pt = CodeAdjust(reg);
} else if (IsApplTerm(reg)) {
*pt = AdjustAppl(reg);
} else if (IsPairTerm(reg)) {
*pt = AdjustPair(reg);
}
}
}
static Term
AdjustGlobTerm(Term reg)
{
if (IsVarTerm(reg)) {
if (IsOldGlobal(reg))
return GlobalAdjust(reg);
else if (IsOldLocal(reg))
return LocalAdjust(reg);
#ifdef MULTI_ASSIGNMENT_VARIABLES
else if (IsOldTrail(reg))
return TrailAdjust(reg);
#endif
} else if (IsApplTerm(reg))
return AdjustAppl(reg);
else if (IsPairTerm(reg))
return AdjustPair(reg);
return AtomTermAdjust(reg);
}
static void
AdjustGlobal(void)
{
CELL *pt;
ArrayEntry *al = DynamicArrays;
StaticArrayEntry *sal = StaticArrays;
GlobalEntry *gl = GlobalVariables;
while (al) {
al->ValueOfVE = AdjustGlobTerm(al->ValueOfVE);
al = al->NextAE;
}
while (gl) {
if (IsVarTerm(gl->global) ||
!IsAtomOrIntTerm(gl->global)) {
gl->global = AdjustGlobTerm(gl->global);
}
gl = gl->NextGE;
}
while (sal) {
if (sal->ArrayType == array_of_nb_terms) {
UInt arity = -sal->ArrayEArity, i;
for (i=0; i < arity; i++) {
/* sal->ValueOfVE.lterms[i].tlive = AdjustGlobTerm(sal->ValueOfVE.lterms[i].tlive); */
Term tlive = sal->ValueOfVE.lterms[i].tlive;
if (!IsVarTerm(tlive) || !IsUnboundVar(&sal->ValueOfVE.lterms[i].tlive)) {
sal->ValueOfVE.lterms[i].tlive = AdjustGlobTerm(sal->ValueOfVE.lterms[i].tlive);
}
}
}
sal = sal->NextAE;
}
/*
* to clean the global now that functors are just variables pointing to
* the code
*/
pt = CellPtr(Yap_GlobalBase);
while (pt < H) {
CELL reg;
reg = *pt;
if (IsVarTerm(reg)) {
if (IsOldGlobal(reg))
*pt = GlobalAdjust(reg);
else if (IsOldLocal(reg))
*pt = LocalAdjust(reg);
else if (IsOldCode(reg)) {
Functor f;
f = (Functor)(*pt = CodeAdjust(reg));
if (f <= FunctorDouble && f >= FunctorLongInt) {
/* skip bitmaps */
switch((CELL)f) {
case (CELL)FunctorDouble:
#if SIZEOF_DOUBLE == 2*SIZEOF_LONG_INT
pt += 3;
#else
pt += 2;
#endif
break;
#if USE_GMP
case (CELL)FunctorBigInt:
{
Int sz = 1+
sizeof(MP_INT)+
(((MP_INT *)(pt+1))->_mp_alloc*sizeof(mp_limb_t));
pt += sz;
}
break;
#endif
case (CELL)FunctorLongInt:
default:
pt += 2;
break;
}
}
}
#ifdef MULTI_ASSIGNMENT_VARIABLES
else if (IsOldTrail(reg))
*pt = TrailAdjust(reg);
#endif
} else if (IsApplTerm(reg))
*pt = AdjustAppl(reg);
else if (IsPairTerm(reg))
*pt = AdjustPair(reg);
else if (IsAtomTerm(reg))
*pt = AtomTermAdjust(reg);
pt++;
}
}
/*
* When growing the stack we need to adjust: the local stack cells pointing
* to the local; the local stack cells and the X terms pointing to the global
* (just once) the trail cells pointing both to the global and to the local
*/
static void
AdjustStacksAndTrail(void)
{
AdjustTrail(TRUE);
AdjustLocal();
AdjustGlobal();
}
void
Yap_AdjustStacksAndTrail(void)
{
AdjustStacksAndTrail();
}
/*
* When growing the stack we need to adjust: the local cells pointing to the
* local; the trail cells pointing to the local
*/
static void
AdjustGrowStack(void)
{
AdjustTrail(FALSE);
AdjustLocal();
}
static void
AdjustRegs(int n)
{
int i;
CELL reg;
for (i = 1; i < n; ++i) {
reg = (CELL) XREGS[i];
if (IsVarTerm(reg)) {
if (IsOldLocal(reg))
reg = LocalAdjust(reg);
else if (IsOldGlobal(reg))
reg = GlobalAdjust(reg);
else if (IsOldTrail(reg))
reg = TrailAdjust(reg);
else if (IsOldCode(reg))
reg = CodeAdjust(reg);
} else if (IsApplTerm(reg))
reg = AdjustAppl(reg);
else if (IsPairTerm(reg))
reg = AdjustPair(reg);
XREGS[i] = (Term) reg;
}
}
static void
AdjustVarTable(VarEntry *ves)
{
ves->VarAdr = TermNil;
if (ves->VarRight != NULL) {
if (IsOldVarTableTrailPtr(ves->VarRight)) {
ves->VarRight = (VarEntry *)TrailAddrAdjust((ADDR)(ves->VarRight));
}
AdjustVarTable(ves->VarRight);
}
if (ves->VarLeft != NULL) {
if (IsOldVarTableTrailPtr(ves->VarLeft)) {
ves->VarLeft = (VarEntry *)TrailAddrAdjust((ADDR)(ves->VarLeft));
}
AdjustVarTable(ves->VarLeft);
}
}
/*
If we have to shift while we are scanning we need to adjust all
pointers created by the scanner (Tokens and Variables)
*/
static void
AdjustScannerStacks(TokEntry **tksp, VarEntry **vep)
{
TokEntry *tks = *tksp;
VarEntry *ves = *vep;
if (tks != NULL) {
if (IsOldTokenTrailPtr(tks)) {
tks = *tksp = TokEntryAdjust(tks);
}
}
while (tks != NULL) {
TokEntry *tktmp;
switch (tks->Tok) {
case Var_tok:
case String_tok:
if (IsOldTrail(tks->TokInfo))
tks->TokInfo = TrailAdjust(tks->TokInfo);
break;
case Name_tok:
tks->TokInfo = (Term)AtomAdjust((Atom)(tks->TokInfo));
break;
default:
break;
}
tktmp = tks->TokNext;
if (tktmp != NULL) {
if (IsOldTokenTrailPtr(tktmp)) {
tktmp = TokEntryAdjust(tktmp);
tks->TokNext = tktmp;
}
}
tks = tktmp;
}
if (ves != NULL) {
if (IsOldVarTableTrailPtr(ves))
ves = *vep = (VarEntry *)TrailAddrAdjust((ADDR)ves);
AdjustVarTable(ves);
}
ves = Yap_AnonVarTable;
if (ves != NULL) {
if (IsOldVarTableTrailPtr(ves))
ves = Yap_AnonVarTable = VarEntryAdjust(ves);
}
while (ves != NULL) {
VarEntry *vetmp = ves->VarLeft;
if (vetmp != NULL) {
if (IsOldVarTableTrailPtr(vetmp)) {
vetmp = VarEntryAdjust(vetmp);
}
ves->VarLeft = vetmp;
}
ves->VarAdr = TermNil;
ves = vetmp;
}
}
void
Yap_AdjustRegs(int n)
{
AdjustRegs(n);
}
/* Used by do_goal() when we're short of heap space */
static int
static_growheap(long size, int fix_code, struct intermediates *cip, tr_fr_ptr *old_trp, TokEntry **tksp, VarEntry **vep)
{
UInt start_growth_time, growth_time;
int gc_verbose;
UInt minimal_request = 0L;
/* adjust to a multiple of 256) */
size = AdjustPageSize(size);
Yap_ErrorMessage = NULL;
if (!Yap_ExtendWorkSpace(size)) {
Int min_size = AdjustPageSize(((CELL)Yap_TrailTop-(CELL)Yap_GlobalBase)+MinHeapGap);
Yap_ErrorMessage = NULL;
if (size < min_size) size = min_size;
minimal_request = size;
size = Yap_ExtendWorkSpaceThroughHole(size);
if (size < 0) {
Yap_ErrorMessage = "Database crashed against Stacks";
return FALSE;
}
}
start_growth_time = Yap_cputime();
gc_verbose = Yap_is_gc_verbose();
heap_overflows++;
if (gc_verbose) {
fprintf(Yap_stderr, "%% Database overflow %d\n", heap_overflows);
fprintf(Yap_stderr, "%% growing the heap %ld bytes\n", size);
}
/* CreepFlag is set to force heap expansion */
if (ActiveSignals == YAP_CDOVF_SIGNAL) {
LOCK(SignalLock);
CreepFlag = CalculateStackGap();
UNLOCK(SignalLock);
}
ASP -= 256;
YAPEnterCriticalSection();
TrDiff = LDiff = GDiff = DelayDiff = size;
XDiff = HDiff = GDiff0 = 0;
GSplit = NULL;
SetHeapRegs();
MoveLocalAndTrail();
if (fix_code) {
CELL *SaveOldH = OldH;
OldH = (CELL *)cip->freep;
MoveGlobal();
OldH = SaveOldH;
} else {
MoveGlobal();
}
if (old_trp) {
tr_fr_ptr nTR;
AdjustScannerStacks(tksp, vep);
nTR = TR;
*old_trp = PtoTRAdjust(*old_trp);
TR = *old_trp;
AdjustStacksAndTrail();
TR = nTR;
} else {
AdjustStacksAndTrail();
}
AdjustRegs(MaxTemps);
YAPLeaveCriticalSection();
ASP += 256;
if (minimal_request)
Yap_AllocHole(minimal_request, size);
growth_time = Yap_cputime()-start_growth_time;
total_heap_overflow_time += growth_time;
if (gc_verbose) {
fprintf(Yap_stderr, "%% took %g sec\n", (double)growth_time/1000);
fprintf(Yap_stderr, "%% Total of %g sec expanding Database\n", (double)total_heap_overflow_time/1000);
}
return(TRUE);
}
/* Used when we're short of heap, usually because of an overflow in
the attributed stack, but also because we allocated a zone */
static int
static_growglobal(long size, CELL **ptr, CELL *hsplit)
{
UInt start_growth_time, growth_time;
int gc_verbose;
char *omax = (ADDR)DelayTop();
ADDR old_GlobalBase = Yap_GlobalBase;
UInt minimal_request = 0L;
long size0, sz = size;
char vb_msg1 = '\0', *vb_msg2;
int do_grow = TRUE;
if (hsplit) {
/* just a little bit of sanity checking */
if (hsplit < (CELL*)omax ||
hsplit > H)
return FALSE;
else if (hsplit == (CELL *)omax)
hsplit = NULL;
if (size+H < ASP-4096 &&
hsplit > H0) {
/* don't need to expand stacks */
do_grow = FALSE;
}
}
size0 = size;
if (size < ((char *)H0-omax)/8)
size = ((char *)H0-omax)/8;
if (do_grow) {
size = AdjustPageSize(size);
}
/* adjust to a multiple of 256) */
Yap_ErrorMessage = NULL;
Yap_PrologMode |= GrowStackMode;
start_growth_time = Yap_cputime();
if (do_grow) {
if (!Yap_ExtendWorkSpace(size)) {
/* always fails when using malloc */
Yap_ErrorMessage = NULL;
size += AdjustPageSize(((CELL)Yap_TrailTop-(CELL)Yap_GlobalBase)+MinHeapGap);
minimal_request = size;
size = Yap_ExtendWorkSpaceThroughHole(size);
if (size < 0) {
Yap_ErrorMessage = "Global Stack crashed against Local Stack";
Yap_PrologMode &= ~GrowStackMode;
return 0;
}
}
}
gc_verbose = Yap_is_gc_verbose();
delay_overflows++;
if (gc_verbose) {
if (hsplit) {
if (hsplit > H0) {
vb_msg1 = 'H';
vb_msg2 = "Global Variable Space";
} else {
vb_msg1 = 'D';
vb_msg2 = "Global Variable Delay Space";
}
} else {
vb_msg1 = 'D';
vb_msg2 = "Delay";
}
fprintf(Yap_stderr, "%% %cO %s overflow %d\n", vb_msg1, vb_msg2, delay_overflows);
fprintf(Yap_stderr, "%% %cO growing the stacks %ld bytes\n", vb_msg1, size);
}
ASP -= 256;
YAPEnterCriticalSection();
#if USE_SYSTEM_MALLOC
/* we always run the risk of shifting memory */
size0 = Yap_GlobalBase-old_GlobalBase;
if (do_grow) {
DelayDiff = size0;
TrDiff = LDiff = GDiff = size+size0;
} else {
TrDiff = DelayDiff = LDiff = 0;
GDiff = size;
}
GDiff0 = DelayDiff;
if (hsplit) {
GDiff = GDiff0+sz;
GSplit = hsplit;
} else {
GSplit = NULL;
}
#else
if (!do_grow) {
TrDiff = DelayDiff = LDiff = 0;
/* don't grow more than what we asked for */
GDiff = size-(size0-sz);
} else if (minimal_request) {
DelayDiff = size-size0;
TrDiff = LDiff = GDiff = size;
} else {
TrDiff = LDiff = GDiff = size;
DelayDiff = 0;
}
if (hsplit) {
GDiff0 = GDiff-size0;
GSplit = hsplit;
} else {
GDiff0 = DelayDiff;
GSplit = NULL;
}
#endif
XDiff = HDiff = 0;
Yap_GlobalBase = old_GlobalBase;
SetHeapRegs();
if (do_grow) {
MoveLocalAndTrail();
if (hsplit) {
MoveGlobalWithHole();
} else {
MoveExpandedGlobal();
}
}
AdjustStacksAndTrail();
AdjustRegs(MaxTemps);
if (ptr) {
*ptr = PtoLocAdjust(*ptr);
}
if (hsplit) {
MoveHalfGlobal(hsplit);
}
YAPLeaveCriticalSection();
ASP += 256;
if (minimal_request) {
Yap_AllocHole(minimal_request, size);
}
growth_time = Yap_cputime()-start_growth_time;
total_delay_overflow_time += growth_time;
if (gc_verbose) {
fprintf(Yap_stderr, "%% %cO took %g sec\n", vb_msg1, (double)growth_time/1000);
fprintf(Yap_stderr, "%% %cO Total of %g sec expanding stacks \n", vb_msg1, (double)total_delay_overflow_time/1000);
}
Yap_PrologMode &= ~GrowStackMode;
if (hsplit)
return GDiff-GDiff0;
else
return GDiff-DelayDiff;
}
static void
fix_compiler_instructions(PInstr *pcpc)
{
while (pcpc != NULL) {
PInstr *ncpc = pcpc->nextInst;
switch(pcpc->op) {
/* check c_var for functions that point at variables */
case get_var_op:
case get_val_op:
case unify_var_op:
case unify_last_var_op:
case unify_val_op:
case unify_local_op:
case unify_last_val_op:
case unify_last_local_op:
case put_var_op:
case put_val_op:
case put_unsafe_op:
case write_unsafe_op:
case write_var_op:
case write_val_op:
case write_local_op:
case f_var_op:
case f_val_op:
case fetch_args_for_bccall:
case bccall_op:
case save_pair_op:
case save_appl_op:
case save_b_op:
case commit_b_op:
case fetch_args_vv_op:
case fetch_args_cv_op:
case fetch_args_vc_op:
pcpc->rnd1 = GlobalAdjust(pcpc->rnd1);
break;
case get_float_op:
case put_float_op:
case get_longint_op:
case put_longint_op:
case unify_float_op:
case unify_last_float_op:
case write_float_op:
/* floats might be in the global */
pcpc->rnd1 = AdjustAppl(pcpc->rnd1);
break;
/* hopefully nothing to do */
case nop_op:
case get_atom_op:
case put_atom_op:
case get_num_op:
case put_num_op:
case align_float_op:
case get_bigint_op:
case put_bigint_op:
case get_list_op:
case put_list_op:
case get_struct_op:
case put_struct_op:
case unify_atom_op:
case unify_last_atom_op:
case write_atom_op:
case unify_num_op:
case unify_last_num_op:
case write_num_op:
case unify_longint_op:
case unify_last_longint_op:
case write_longint_op:
case unify_bigint_op:
case unify_last_bigint_op:
case write_bigint_op:
case unify_list_op:
case write_list_op:
case unify_struct_op:
case write_struct_op:
case fail_op:
case cut_op:
case cutexit_op:
case allocate_op:
case deallocate_op:
case tryme_op:
case jump_op:
case jumpi_op:
case procceed_op:
case call_op:
case execute_op:
case safe_call_op:
case label_op:
case name_op:
case pop_op:
case retryme_op:
case trustme_op:
case either_op:
case orelse_op:
case orlast_op:
case push_or_op:
case pushpop_or_op:
case pop_or_op:
case patch_b_op:
case try_op:
case retry_op:
case trust_op:
case try_in_op:
case jump_v_op:
case jump_nv_op:
case cache_arg_op:
case cache_sub_arg_op:
case switch_on_type_op:
case switch_c_op:
case if_c_op:
case switch_f_op:
case if_f_op:
case if_not_op:
case index_dbref_op:
case index_blob_op:
case if_nonvar_op:
case commit_opt_op:
case unify_last_list_op:
case write_last_list_op:
case unify_last_struct_op:
case write_last_struct_op:
case mark_initialised_pvars_op:
case mark_live_regs_op:
case enter_profiling_op:
case retry_profiled_op:
case count_call_op:
case count_retry_op:
case restore_tmps_op:
case restore_tmps_and_skip_op:
case enter_lu_op:
case empty_call_op:
case blob_op:
case fetch_args_vi_op:
case fetch_args_iv_op:
#ifdef TABLING
case table_new_answer_op:
case table_try_single_op:
#endif /* TABLING */
#ifdef BEAM
case run_op:
case body_op:
case endgoal_op:
case try_me_op:
case retry_me_op:
case trust_me_op:
case only_1_clause_op:
case create_first_box_op:
case create_box_op:
case create_last_box_op:
case remove_box_op:
case remove_last_box_op:
case prepare_tries:
case std_base_op:
case direct_safe_call_op:
case commit_op:
case skip_while_var_op:
case wait_while_var_op:
case force_wait_op:
case write_op:
case is_op:
case equal_op:
case exit_op:
#endif
break;
}
if (ncpc != NULL) {
ncpc = (PInstr *)GlobalAddrAdjust((ADDR)(pcpc->nextInst));
pcpc->nextInst = ncpc;
}
pcpc = ncpc;
}
}
#ifdef TABLING
static void
fix_tabling_info(void)
{
/* we must fix the dependency frames and the subgoal frames, as they are
pointing back to the global stack. */
struct dependency_frame *df;
struct subgoal_frame *sg;
df = LOCAL_top_dep_fr;
while (df) {
if (DepFr_backchain_cp(df))
DepFr_backchain_cp(df) = ChoicePtrAdjust(DepFr_backchain_cp(df));
DepFr_leader_cp(df) = ChoicePtrAdjust(DepFr_leader_cp(df));
DepFr_cons_cp(df) = ConsumerChoicePtrAdjust(DepFr_cons_cp(df));
df = DepFr_next(df);
}
sg = LOCAL_top_sg_fr;
while (sg) {
SgFr_gen_cp(sg) = GeneratorChoicePtrAdjust(SgFr_gen_cp(sg));
sg = SgFr_next(sg);
}
}
#endif /* TABLING */
static int
do_growheap(int fix_code, UInt in_size, struct intermediates *cip, tr_fr_ptr *old_trp, TokEntry **tksp, VarEntry **vep)
{
unsigned long size = sizeof(CELL) * 16 * 1024L;
int shift_factor = (heap_overflows > 8 ? 8 : heap_overflows);
unsigned long sz = size << shift_factor;
if (sz < in_size) {
sz = in_size;
}
#if YAPOR
Yap_Error(OUT_OF_HEAP_ERROR,TermNil,"cannot grow Heap: more than a worker/thread running");
return FALSE;
#endif
if (SizeOfOverflow > sz)
sz = AdjustPageSize(SizeOfOverflow);
while(sz >= sizeof(CELL) * 16 * 1024L && !static_growheap(sz, fix_code, cip, old_trp, tksp, vep)) {
size = size/2;
sz = size << shift_factor;
if (sz < in_size) {
return FALSE;
}
}
/* we must fix an instruction chain */
if (fix_code) {
PInstr *pcpc = cip->CodeStart;
if (pcpc != NULL) {
cip->CodeStart = pcpc = (PInstr *)GlobalAddrAdjust((ADDR)pcpc);
}
fix_compiler_instructions(pcpc);
pcpc = cip->BlobsStart;
if (pcpc != NULL) {
cip->BlobsStart = pcpc = (PInstr *)GlobalAddrAdjust((ADDR)pcpc);
}
fix_compiler_instructions(pcpc);
cip->freep = (char *)GlobalAddrAdjust((ADDR)cip->freep);
cip->label_offset = (int *)GlobalAddrAdjust((ADDR)cip->label_offset);
}
#ifdef TABLING
fix_tabling_info();
#endif /* TABLING */
if (sz >= sizeof(CELL) * 16 * 1024L) {
LOCK(SignalLock);
ActiveSignals &= ~YAP_CDOVF_SIGNAL;
if (!ActiveSignals)
CreepFlag = CalculateStackGap();
UNLOCK(SignalLock);
return TRUE;
}
/* failed */
return FALSE;
}
static void
init_new_table(AtomHashEntry *ntb, UInt nsize)
{
UInt i;
for (i = 0; i < nsize; ++i) {
INIT_RWLOCK(ntb[i].AERWLock);
ntb[i].Entry = NIL;
}
}
static void
cp_atom_table(AtomHashEntry *ntb, UInt nsize)
{
UInt i;
for (i = 0; i < AtomHashTableSize; i++) {
Atom catom;
READ_LOCK(HashChain[i].AERWLock);
catom = HashChain[i].Entry;
while (catom != NIL) {
AtomEntry *ap = RepAtom(catom);
Atom natom;
CELL hash;
hash = HashFunction((unsigned char *)ap->StrOfAE) % nsize;
natom = ap->NextOfAE;
ap->NextOfAE = ntb[hash].Entry;
ntb[hash].Entry = catom;
catom = natom;
}
READ_UNLOCK(HashChain[i].AERWLock);
}
}
static int
growatomtable(void)
{
AtomHashEntry *ntb;
UInt nsize = 4*AtomHashTableSize-1;
UInt start_growth_time = Yap_cputime(), growth_time;
int gc_verbose = Yap_is_gc_verbose();
LOCK(SignalLock);
if (ActiveSignals == YAP_CDOVF_SIGNAL) {
CreepFlag = CalculateStackGap();
}
ActiveSignals &= ~YAP_CDOVF_SIGNAL;
UNLOCK(SignalLock);
while ((ntb = (AtomHashEntry *)Yap_AllocCodeSpace(nsize*sizeof(AtomHashEntry))) == NULL) {
/* leave for next time */
#if !USE_SYSTEM_MALLOC
if (!do_growheap(FALSE, nsize*sizeof(AtomHashEntry), NULL, NULL, NULL, NULL))
#endif
return FALSE;
}
atom_table_overflows++;
if (gc_verbose) {
fprintf(Yap_stderr, "%% Atom Table overflow %d\n", atom_table_overflows);
fprintf(Yap_stderr, "%% growing the atom table to %ld entries\n", (long int)(nsize));
}
YAPEnterCriticalSection();
init_new_table(ntb, nsize);
cp_atom_table(ntb, nsize);
Yap_FreeCodeSpace((char *)HashChain);
HashChain = ntb;
AtomHashTableSize = nsize;
YAPLeaveCriticalSection();
growth_time = Yap_cputime()-start_growth_time;
total_atom_table_overflow_time += growth_time;
if (gc_verbose) {
fprintf(Yap_stderr, "%% took %g sec\n", (double)growth_time/1000);
fprintf(Yap_stderr, "%% Total of %g sec expanding atom table \n", (double)total_atom_table_overflow_time/1000);
}
#if USE_SYSTEM_MALLOC
return TRUE;
#else
if (HeapTop + sizeof(YAP_SEG_SIZE) < HeapLim) {
/* make sure there is no heap overflow */
int res;
YAPEnterCriticalSection();
res = do_growheap(FALSE, 0, NULL, NULL, NULL, NULL);
YAPLeaveCriticalSection();
return res;
} else {
return TRUE;
}
#endif
}
int
Yap_growheap(int fix_code, UInt in_size, void *cip)
{
int res;
if (NOfAtoms > 2*AtomHashTableSize) {
UInt n = NOfAtoms;
if (AGcThreshold)
Yap_atom_gc();
/* check if we have a significant improvement from agc */
if (n > NOfAtoms+ NOfAtoms/10 ||
NOfAtoms > 2*AtomHashTableSize) {
res = growatomtable();
} else {
LOCK(SignalLock);
if (ActiveSignals == YAP_CDOVF_SIGNAL) {
CreepFlag = CalculateStackGap();
}
ActiveSignals &= ~YAP_CDOVF_SIGNAL;
UNLOCK(SignalLock);
return TRUE;
}
Yap_PrologMode &= ~GrowHeapMode;
return res;
}
res=do_growheap(fix_code, in_size, (struct intermediates *)cip, NULL, NULL, NULL);
Yap_PrologMode &= ~GrowHeapMode;
return res;
}
int
Yap_growheap_in_parser(tr_fr_ptr *old_trp, TokEntry **tksp, VarEntry **vep)
{
int res;
res=do_growheap(FALSE, 0L, NULL, old_trp, tksp, vep);
Yap_PrologMode &= ~GrowHeapMode;
return res;
}
int
Yap_growglobal(CELL **ptr)
{
unsigned long sz = sizeof(CELL) * 16 * 1024L;
#if YAPOR
if (NOfThreads != 1) {
Yap_Error(OUT_OF_STACK_ERROR,TermNil,"cannot grow Global: more than a worker/thread running");
return(FALSE);
}
#endif
if ( static_growglobal(sz, ptr, NULL) == 0)
return FALSE;
#ifdef TABLING
fix_tabling_info();
#endif /* TABLING */
return TRUE;
}
UInt
Yap_InsertInGlobal(CELL *where, UInt howmuch)
{
if ((howmuch = static_growglobal(howmuch, NULL, where)) == 0)
return 0;
#ifdef TABLING
fix_tabling_info();
#endif /* TABLING */
return howmuch;
}
int
Yap_growstack(long size)
{
int res;
Yap_PrologMode |= GrowStackMode;
res=growstack(size);
Yap_PrologMode &= ~GrowStackMode;
return res;
}
static int
execute_growstack(long size0, int from_trail, int in_parser, tr_fr_ptr *old_trp, TokEntry **tksp, VarEntry **vep)
{
UInt minimal_request = 0L;
long size = size0;
ADDR old_Yap_GlobalBase = Yap_GlobalBase;
if (!Yap_ExtendWorkSpace(size)) {
/* make sure stacks and trail are contiguous */
Yap_ErrorMessage = NULL;
minimal_request = AdjustPageSize(((CELL)Yap_TrailTop-(CELL)Yap_GlobalBase)+4*MinHeapGap+size0);
size = Yap_ExtendWorkSpaceThroughHole(minimal_request);
if (size < 0) {
Yap_ErrorMessage = "Database crashed against stacks";
return FALSE;
}
YAPEnterCriticalSection();
GDiff = DelayDiff = size-size0;
} else {
YAPEnterCriticalSection();
if (Yap_GlobalBase != old_Yap_GlobalBase) {
GDiff = DelayDiff = Yap_GlobalBase-old_Yap_GlobalBase;
Yap_GlobalBase=old_Yap_GlobalBase;
} else {
GDiff = DelayDiff = 0;
}
}
XDiff = HDiff = 0;
GDiff0=0;
#if USE_SYSTEM_MALLOC
if (from_trail) {
TrDiff = LDiff = GDiff;
} else {
TrDiff = LDiff = size+GDiff;
}
#else
if (from_trail) {
TrDiff = LDiff = size-size0;
} else {
TrDiff = LDiff = size;
}
#endif
ASP -= 256;
SetHeapRegs();
if (from_trail) {
Yap_TrailTop += size0;
}
if (LDiff) {
MoveLocalAndTrail();
}
if (GDiff) {
#if !USE_SYSTEM_MALLOC
/* That is done by realloc */
MoveGlobal();
#endif
if (in_parser) {
tr_fr_ptr nTR;
AdjustScannerStacks(tksp, vep);
nTR = TR;
*old_trp = PtoTRAdjust(*old_trp);
TR = *old_trp;
AdjustStacksAndTrail();
TR = nTR;
} else {
AdjustStacksAndTrail();
}
AdjustRegs(MaxTemps);
#ifdef TABLING
fix_tabling_info();
#endif /* TABLING */
} else if (LDiff) {
if (in_parser) {
tr_fr_ptr nTR;
AdjustScannerStacks(tksp, vep);
nTR = TR;
*old_trp = PtoTRAdjust(*old_trp);
TR = *old_trp;
AdjustGrowStack();
TR = nTR;
} else {
AdjustGrowStack();
}
AdjustRegs(MaxTemps);
#ifdef TABLING
fix_tabling_info();
#endif /* TABLING */
}
YAPLeaveCriticalSection();
ASP += 256;
if (minimal_request)
Yap_AllocHole(minimal_request, size);
return TRUE;
}
/* Used by do_goal() when we're short of stack space */
static int
growstack(long size)
{
UInt start_growth_time, growth_time;
int gc_verbose;
/* adjust to a multiple of 256) */
size = AdjustPageSize(size);
Yap_ErrorMessage = NULL;
start_growth_time = Yap_cputime();
gc_verbose = Yap_is_gc_verbose();
stack_overflows++;
if (gc_verbose) {
fprintf(Yap_stderr, "%% Stack Overflow %d\n", stack_overflows);
fprintf(Yap_stderr, "%% Global: %8ld cells (%p-%p)\n", (unsigned long int)(H-(CELL *)Yap_GlobalBase),Yap_GlobalBase,H);
fprintf(Yap_stderr, "%% Local:%8ld cells (%p-%p)\n", (unsigned long int)(LCL0-ASP),LCL0,ASP);
fprintf(Yap_stderr, "%% Trail:%8ld cells (%p-%p)\n",
(unsigned long int)(TR-(tr_fr_ptr)Yap_TrailBase),Yap_TrailBase,TR);
fprintf(Yap_stderr, "%% Growing the stacks %ld bytes\n", size);
}
if (!execute_growstack(size, FALSE, FALSE, NULL, NULL, NULL))
return FALSE;
growth_time = Yap_cputime()-start_growth_time;
total_stack_overflow_time += growth_time;
if (gc_verbose) {
fprintf(Yap_stderr, "%% took %g sec\n", (double)growth_time/1000);
fprintf(Yap_stderr, "%% Total of %g sec expanding stacks \n", (double)total_stack_overflow_time/1000);
}
return(TRUE);
}
/* Used by parser when we're short of stack space */
int
Yap_growstack_in_parser(tr_fr_ptr *old_trp, TokEntry **tksp, VarEntry **vep)
{
UInt size;
UInt start_growth_time, growth_time;
int gc_verbose;
Yap_PrologMode |= GrowStackMode;
/* adjust to a multiple of 256) */
size = AdjustPageSize((ADDR)LCL0-Yap_GlobalBase);
Yap_ErrorMessage = NULL;
start_growth_time = Yap_cputime();
gc_verbose = Yap_is_gc_verbose();
stack_overflows++;
if (gc_verbose) {
fprintf(Yap_stderr, "%% Stack Overflow %d\n", stack_overflows);
fprintf(Yap_stderr, "%% Global: %8ld cells (%p-%p)\n", (unsigned long int)(H-(CELL *)Yap_GlobalBase),Yap_GlobalBase,H);
fprintf(Yap_stderr, "%% Local:%8ld cells (%p-%p)\n", (unsigned long int)(LCL0-ASP),LCL0,ASP);
fprintf(Yap_stderr, "%% Trail:%8ld cells (%p-%p)\n",
(unsigned long int)(TR-(tr_fr_ptr)Yap_TrailBase),Yap_TrailBase,TR);
fprintf(Yap_stderr, "%% Growing the stacks %ld bytes\n", (unsigned long int)size);
}
if (!execute_growstack(size, FALSE, TRUE, old_trp, tksp, vep)) {
Yap_PrologMode &= ~GrowStackMode;
return FALSE;
}
growth_time = Yap_cputime()-start_growth_time;
total_stack_overflow_time += growth_time;
if (gc_verbose) {
fprintf(Yap_stderr, "%% took %g sec\n", (double)growth_time/1000);
fprintf(Yap_stderr, "%% Total of %g sec expanding stacks \n", (double)total_stack_overflow_time/1000);
}
Yap_PrologMode &= ~GrowStackMode;
return TRUE;
}
static int do_growtrail(long size, int contiguous_only, int in_parser, tr_fr_ptr *old_trp, TokEntry **tksp, VarEntry **vep)
{
UInt start_growth_time = Yap_cputime(), growth_time;
int gc_verbose = Yap_is_gc_verbose();
#if USE_SYSTEM_MALLOC
if (contiguous_only)
return FALSE;
#endif
/* at least 64K for trail */
if (!size)
size = ((ADDR)TR-Yap_TrailBase);
size *= 2;
if (size < 64*1024)
size = 64*1024;
if (size > 2048*1024)
size = 2048*1024;
/* adjust to a multiple of 256) */
size = AdjustPageSize(size);
trail_overflows++;
if (gc_verbose) {
fprintf(Yap_stderr, "%% Trail overflow %d\n", trail_overflows);
#if USE_SYSTEM_MALLOC
fprintf(Yap_stderr, "%% Heap: %8ld cells (%p-%p)\n", (unsigned long int)(H-(CELL *)Yap_GlobalBase),(CELL *)Yap_GlobalBase,H);
fprintf(Yap_stderr, "%% Local:%8ld cells (%p-%p)\n", (unsigned long int)(LCL0-ASP),LCL0,ASP);
fprintf(Yap_stderr, "%% Trail:%8ld cells (%p-%p)\n",
(unsigned long int)(TR-(tr_fr_ptr)Yap_TrailBase),Yap_TrailBase,TR);
#endif
fprintf(Yap_stderr, "%% growing the trail %ld bytes\n", size);
}
Yap_ErrorMessage = NULL;
#if USE_SYSTEM_MALLOC
execute_growstack(size, TRUE, in_parser, old_trp, tksp, vep);
#else
if (!Yap_ExtendWorkSpace(size)) {
Yap_ErrorMessage = NULL;
if (contiguous_only) {
/* I can't expand in this case */
trail_overflows--;
return FALSE;
}
execute_growstack(size, TRUE, in_parser, old_trp, tksp, vep);
} else {
YAPEnterCriticalSection();
if (in_parser) {
TrDiff = LDiff = GDiff = DelayDiff = XDiff = HDiff = GDiff0 = 0;
AdjustScannerStacks(tksp, vep);
}
Yap_TrailTop += size;
YAPLeaveCriticalSection();
}
#endif
growth_time = Yap_cputime()-start_growth_time;
total_trail_overflow_time += growth_time;
if (gc_verbose) {
fprintf(Yap_stderr, "%% took %g sec\n", (double)growth_time/1000);
fprintf(Yap_stderr, "%% Total of %g sec expanding trail \n", (double)total_trail_overflow_time/1000);
}
LOCK(SignalLock);
if (ActiveSignals == YAP_TROVF_SIGNAL) {
CreepFlag = CalculateStackGap();
}
ActiveSignals &= ~YAP_TROVF_SIGNAL;
UNLOCK(SignalLock);
return TRUE;
}
/* Used by do_goal() when we're short of stack space */
int
Yap_growtrail(long size, int contiguous_only)
{
return do_growtrail(size, contiguous_only, FALSE, NULL, NULL, NULL);
}
int
Yap_growtrail_in_parser(tr_fr_ptr *old_trp, TokEntry **tksp, VarEntry **vep)
{
return do_growtrail(0, FALSE, TRUE, old_trp, tksp, vep);
}
CELL **
Yap_shift_visit(CELL **to_visit, CELL ***to_visit_maxp)
{
#if USE_SYSTEM_MALLOC || USE_DL_MALLOC
CELL **to_visit_max = *to_visit_maxp;
Int sz1 = (CELL)to_visit_max-(CELL)to_visit;
Int sz0 = AuxTop - (ADDR)to_visit_maxp, sz, dsz;
char *newb = Yap_ExpandPreAllocCodeSpace(0, NULL);
/* check new size */
sz = AuxTop-newb;
/* how much we grew */
dsz = sz-sz0;
/* copy whole block to end */
cpcellsd((CELL *)newb, (CELL *)(newb+dsz), sz0/sizeof(CELL));
/* base pointer is block start */
*to_visit_maxp = (CELL **)newb;
/* current top is originall diff + diff size */
return (CELL **)((char *)newb+(sz1+dsz));
#else
CELL **old_top = (CELL **)Yap_TrailTop;
if (do_growtrail(64 * 1024L, FALSE, FALSE, NULL, NULL, NULL)) {
CELL **dest = (CELL **)((char *)to_visit+64 * 1024L);
cpcellsd((CELL *)dest, (CELL *)to_visit, (CELL)((CELL *)old_top-(CELL *)to_visit));
return dest;
} else {
Yap_Error(OUT_OF_HEAP_ERROR,TermNil,"cannot grow temporary stack for unification (%p)", Yap_TrailTop);
return to_visit;
}
#endif
}
static Int
p_inform_trail_overflows(void)
{
Term tn = MkIntTerm(trail_overflows);
Term tt = MkIntegerTerm(total_trail_overflow_time);
return(Yap_unify(tn, ARG1) && Yap_unify(tt, ARG2));
}
/* :- grow_heap(Size) */
static Int
p_growheap(void)
{
Int diff;
Term t1 = Deref(ARG1);
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, "grow_heap/1");
return(FALSE);
} else if (!IsIntTerm(t1)) {
Yap_Error(TYPE_ERROR_INTEGER, t1, "grow_heap/1");
return(FALSE);
}
diff = IntOfTerm(t1);
if (diff < 0) {
Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO, t1, "grow_heap/1");
}
return(static_growheap(diff, FALSE, NULL, NULL, NULL, NULL));
}
static Int
p_inform_heap_overflows(void)
{
Term tn = MkIntTerm(heap_overflows);
Term tt = MkIntegerTerm(total_heap_overflow_time);
return(Yap_unify(tn, ARG1) && Yap_unify(tt, ARG2));
}
/* :- grow_stack(Size) */
static Int
p_growstack(void)
{
Int diff;
Term t1 = Deref(ARG1);
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, "grow_stack/1");
return(FALSE);
} else if (!IsIntTerm(t1)) {
Yap_Error(TYPE_ERROR_INTEGER, t1, "grow_stack/1");
return(FALSE);
}
diff = IntOfTerm(t1);
if (diff < 0) {
Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO, t1, "grow_stack/1");
}
return(growstack(diff));
}
static Int
p_inform_stack_overflows(void)
{ /* */
Term tn = MkIntTerm(stack_overflows);
Term tt = MkIntegerTerm(total_stack_overflow_time);
return(Yap_unify(tn, ARG1) && Yap_unify(tt, ARG2));
}
Int
Yap_total_stack_shift_time(void)
{
return(total_heap_overflow_time+
total_stack_overflow_time+
total_trail_overflow_time);
}
void
Yap_InitGrowPreds(void)
{
Yap_InitCPred("$grow_heap", 1, p_growheap, SafePredFlag|HiddenPredFlag);
Yap_InitCPred("$grow_stack", 1, p_growstack, SafePredFlag|HiddenPredFlag);
Yap_InitCPred("$inform_trail_overflows", 2, p_inform_trail_overflows, SafePredFlag|HiddenPredFlag);
Yap_InitCPred("$inform_heap_overflows", 2, p_inform_heap_overflows, SafePredFlag|HiddenPredFlag);
Yap_InitCPred("$inform_stack_overflows", 2, p_inform_stack_overflows, SafePredFlag|HiddenPredFlag);
Yap_init_gc();
Yap_init_agc();
}