621e47f8a4
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1801 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2220 lines
49 KiB
C
2220 lines
49 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: non backtrackable term support *
|
|
* Last rev: 2/8/06 *
|
|
* mods: *
|
|
* comments: non-backtrackable term support *
|
|
* *
|
|
*************************************************************************/
|
|
#ifdef SCCS
|
|
static char SccsId[] = "%W% %G%";
|
|
#endif
|
|
|
|
#include "Yap.h"
|
|
#include "Yatom.h"
|
|
#include "Heap.h"
|
|
#include "yapio.h"
|
|
#include "iopreds.h"
|
|
#include "attvar.h"
|
|
|
|
/* Non-backtrackable terms will from now on be stored on arenas, a
|
|
special term on the heap. Arenas automatically contract as we add terms to
|
|
the front.
|
|
|
|
*/
|
|
|
|
#define QUEUE_ARENA 0
|
|
#define QUEUE_DELAY_ARENA 1
|
|
#define QUEUE_HEAD 2
|
|
#define QUEUE_TAIL 3
|
|
#define QUEUE_SIZE 4
|
|
|
|
#define HEAP_SIZE 0
|
|
#define HEAP_MAX 1
|
|
#define HEAP_ARENA 2
|
|
#define HEAP_DELAY_ARENA 3
|
|
#define HEAP_START 4
|
|
|
|
#define Global_MkIntegerTerm(I) MkIntegerTerm(I)
|
|
|
|
static UInt
|
|
big2arena_sz(CELL *arena_base)
|
|
{
|
|
return ((MP_INT*)(arena_base+1))->_mp_alloc + (sizeof(MP_INT) + sizeof(Functor)+sizeof(CELL))/sizeof(CELL);
|
|
}
|
|
|
|
static UInt
|
|
arena2big_sz(UInt sz)
|
|
{
|
|
return sz - (sizeof(MP_INT) + sizeof(Functor) + sizeof(CELL))/sizeof(CELL);
|
|
}
|
|
|
|
|
|
/* pointer to top of an arena */
|
|
static inline CELL *
|
|
ArenaLimit(Term arena)
|
|
{
|
|
CELL *arena_base = RepAppl(arena);
|
|
UInt sz = big2arena_sz(arena_base);
|
|
return arena_base+sz;
|
|
}
|
|
|
|
/* pointer to top of an arena */
|
|
static inline CELL *
|
|
ArenaPt(Term arena)
|
|
{
|
|
return (CELL *)RepAppl(arena);
|
|
}
|
|
|
|
static inline UInt
|
|
ArenaSz(Term arena)
|
|
{
|
|
return big2arena_sz(RepAppl(arena));
|
|
}
|
|
|
|
static Term
|
|
CreateNewArena(CELL *ptr, UInt size)
|
|
{
|
|
Term t = AbsAppl(ptr);
|
|
MP_INT *dst;
|
|
|
|
ptr[0] = (CELL)FunctorBigInt;
|
|
dst = (MP_INT *)(ptr+1);
|
|
dst->_mp_size = 0L;
|
|
dst->_mp_alloc = arena2big_sz(size);
|
|
ptr[size-1] = EndSpecials;
|
|
|
|
return t;
|
|
}
|
|
|
|
#if COROUTINING
|
|
|
|
/* pointer to top of an arena */
|
|
static inline attvar_record *
|
|
DelayArenaPt(Term arena)
|
|
{
|
|
return (attvar_record *)arena;
|
|
}
|
|
|
|
static inline UInt
|
|
DelayArenaSz(Term arena)
|
|
{
|
|
attvar_record *ptr = (attvar_record *)arena-1;
|
|
return 1+(ptr-(attvar_record *)ptr->Done);
|
|
}
|
|
|
|
static void
|
|
ResetDelayArena(Term old_delay_arena, Term *new_arenap)
|
|
{
|
|
attvar_record *min = (attvar_record *)*new_arenap;
|
|
Term base = min[-1].Done;
|
|
while (min < (attvar_record *)old_delay_arena) {
|
|
min->Value = (Term)(min-1);
|
|
min->Done = base;
|
|
RESET_VARIABLE(&min->Atts);
|
|
min++;
|
|
}
|
|
*new_arenap = old_delay_arena;
|
|
}
|
|
|
|
|
|
static Term
|
|
CreateDelayArena(attvar_record *max, attvar_record *min)
|
|
{
|
|
attvar_record *ptr = max;
|
|
while (ptr > min) {
|
|
--ptr;
|
|
ptr->Done = (CELL)min;
|
|
ptr->Value = (CELL)(ptr-1);
|
|
RESET_VARIABLE(&ptr->Atts);
|
|
}
|
|
RESET_VARIABLE(&(ptr->Value));
|
|
return (CELL)max;
|
|
}
|
|
|
|
static Term
|
|
NewDelayArena(UInt size)
|
|
{
|
|
attvar_record *max = DelayTop(), *min = max-size;
|
|
Term out;
|
|
UInt howmuch;
|
|
|
|
while ((ADDR)min < Yap_GlobalBase+1024) {
|
|
if ((howmuch = Yap_InsertInGlobal((CELL *)max, size*sizeof(attvar_record)))==0) {
|
|
Yap_Error(OUT_OF_STACK_ERROR,TermNil,"No Stack Space for Non-Backtrackable terms");
|
|
return TermNil;
|
|
}
|
|
size = howmuch/sizeof(attvar_record);
|
|
max = DelayTop(), min = max-size;
|
|
}
|
|
out = CreateDelayArena(max, min);
|
|
SetDelayTop(min);
|
|
return out;
|
|
}
|
|
|
|
static Term
|
|
GrowDelayArena(Term *arenap, UInt old_size, UInt size, UInt arity)
|
|
{
|
|
Term arena = *arenap;
|
|
UInt howmuch;
|
|
|
|
if (size == 0) {
|
|
if (old_size < 1024) {
|
|
size = old_size*2;
|
|
} else {
|
|
size = old_size+1024;
|
|
}
|
|
}
|
|
if (size < 64) {
|
|
size = 64;
|
|
}
|
|
/* just make sure we are shifted up when we expand stacks */
|
|
XREGS[arity+1] = arena;
|
|
if ((howmuch = Yap_InsertInGlobal((CELL *)arena, (size-old_size)*sizeof(attvar_record)))==0) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
|
|
return TermNil;
|
|
}
|
|
size = howmuch/sizeof(attvar_record)+old_size;
|
|
arena = XREGS[arity+1];
|
|
CreateDelayArena(DelayArenaPt(arena), DelayArenaPt(arena)-size);
|
|
return arena;
|
|
}
|
|
|
|
#endif
|
|
|
|
static Term
|
|
NewArena(UInt size, UInt arity, CELL *where)
|
|
{
|
|
Term t;
|
|
UInt new_size;
|
|
|
|
if (where == NULL || where == H) {
|
|
while (H+size > ASP-1024) {
|
|
if (!Yap_gcl(size*sizeof(CELL), arity, ENV, P)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
|
|
return TermNil;
|
|
}
|
|
}
|
|
t = CreateNewArena(H, size);
|
|
H += size;
|
|
} else {
|
|
if ((new_size=Yap_InsertInGlobal(where, size*sizeof(CELL)))==0) {
|
|
Yap_Error(OUT_OF_STACK_ERROR,TermNil,"No Stack Space for Non-Backtrackable terms");
|
|
return TermNil;
|
|
}
|
|
size = new_size/sizeof(CELL);
|
|
t = CreateNewArena(where, size);
|
|
}
|
|
return t;
|
|
}
|
|
|
|
static Int
|
|
p_allocate_arena(void)
|
|
{
|
|
Term t = Deref(ARG1);
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"allocate_arena");
|
|
return FALSE;
|
|
} else if (!IsIntegerTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER,t,"allocate_arena");
|
|
return FALSE;
|
|
}
|
|
return Yap_unify(ARG2,NewArena(IntegerOfTerm(t), 1, NULL));
|
|
}
|
|
|
|
|
|
static Int
|
|
p_default_arena_size(void)
|
|
{
|
|
return Yap_unify(ARG1,MkIntegerTerm(ArenaSz(GlobalArena)));
|
|
}
|
|
|
|
|
|
static Int
|
|
p_allocate_default_arena(void)
|
|
{
|
|
Term t = Deref(ARG1);
|
|
Term t2 = Deref(ARG2);
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"allocate_arena");
|
|
return FALSE;
|
|
} else if (!IsIntegerTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER,t,"allocate_arena");
|
|
return FALSE;
|
|
}
|
|
if (IsVarTerm(t2)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t2,"allocate_arena");
|
|
return FALSE;
|
|
} else if (!IsIntegerTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER,t2,"allocate_arena");
|
|
return FALSE;
|
|
}
|
|
GlobalArena = NewArena(IntegerOfTerm(t), 2, NULL);
|
|
#if COROUTINING
|
|
GlobalDelayArena = NewDelayArena(2);
|
|
#endif
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static int
|
|
GrowArena(Term arena, CELL *pt, UInt old_size, UInt size, UInt arity)
|
|
{
|
|
if (size == 0) {
|
|
if (old_size < 1024*1024) {
|
|
size = old_size;
|
|
} else {
|
|
size = old_size+1024*1024;
|
|
}
|
|
}
|
|
if (size < 4096) {
|
|
size = 4096;
|
|
}
|
|
if (pt == H) {
|
|
choiceptr b_ptr;
|
|
if (H+size > ASP-1024) {
|
|
|
|
XREGS[arity+1] = arena;
|
|
if (!Yap_gcl(size*sizeof(CELL), arity+1, ENV, P)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
|
|
return FALSE;
|
|
}
|
|
arena = XREGS[arity+1];
|
|
}
|
|
/* adjust possible back pointers in choice-point stack */
|
|
b_ptr = B;
|
|
while (b_ptr->cp_h == H) {
|
|
b_ptr->cp_h += size;
|
|
b_ptr = b_ptr->cp_b;
|
|
}
|
|
H += size;
|
|
} else {
|
|
XREGS[arity+1] = arena;
|
|
if ((size=Yap_InsertInGlobal(pt, size*sizeof(CELL)))==0) {
|
|
return FALSE;
|
|
}
|
|
size = size/sizeof(CELL);
|
|
arena = XREGS[arity+1];
|
|
}
|
|
CreateNewArena(ArenaPt(arena), size+old_size);
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
CloseArena(CELL *oldH, CELL *oldHB, CELL *oldASP, Term *oldArenaP, UInt old_size)
|
|
{
|
|
UInt new_size;
|
|
|
|
if (H == oldH)
|
|
return;
|
|
new_size = old_size - (H-RepAppl(*oldArenaP));
|
|
*oldArenaP = CreateNewArena(H, new_size);
|
|
H = oldH;
|
|
HB = oldHB;
|
|
ASP = oldASP;
|
|
}
|
|
|
|
static inline void
|
|
clean_dirty_tr(tr_fr_ptr TR0) {
|
|
if (TR != TR0) {
|
|
tr_fr_ptr pt = TR0;
|
|
|
|
do {
|
|
Term p = TrailTerm(pt++);
|
|
if (IsVarTerm(p)) {
|
|
RESET_VARIABLE(p);
|
|
} else {
|
|
/* copy downwards */
|
|
TrailTerm(TR0+1) = TrailTerm(pt);
|
|
TrailTerm(TR0) = TrailTerm(TR0+2) = p;
|
|
pt+=2;
|
|
TR0 += 3;
|
|
}
|
|
} while (pt != TR);
|
|
TR = TR0;
|
|
}
|
|
}
|
|
|
|
#if COROUTINING
|
|
|
|
static int
|
|
CopyAttVar(CELL *orig, CELL ***to_visit_ptr, CELL *res, Term *att_arenap)
|
|
{
|
|
register attvar_record *attv = (attvar_record *)orig;
|
|
register attvar_record *newv;
|
|
CELL **to_visit = *to_visit_ptr;
|
|
CELL *vt;
|
|
|
|
/* add a new attributed variable */
|
|
if (DelayArenaSz(*att_arenap) < 8)
|
|
return FALSE;
|
|
newv = DelayArenaPt(*att_arenap);
|
|
newv--;
|
|
RESET_VARIABLE(&(newv->Value));
|
|
RESET_VARIABLE(&(newv->Done));
|
|
vt = &(attv->Atts);
|
|
to_visit[0] = vt-1;
|
|
to_visit[1] = vt;
|
|
if (IsVarTerm(attv->Atts)) {
|
|
newv->Atts = (CELL)H;
|
|
to_visit[2] = H;
|
|
H++;
|
|
} else {
|
|
to_visit[2] = &(newv->Atts);
|
|
}
|
|
to_visit[3] = (CELL *)vt[-1];
|
|
*to_visit_ptr = to_visit+4;
|
|
*res = (CELL)&(newv->Done);
|
|
*att_arenap = (CELL)(newv);
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
copy_complex_term(register CELL *pt0, register CELL *pt0_end, CELL *ptf, CELL *HLow, Term *att_arenap)
|
|
{
|
|
|
|
CELL **to_visit0, **to_visit = (CELL **)Yap_PreAllocCodeSpace();
|
|
CELL *HB0 = HB;
|
|
tr_fr_ptr TR0 = TR;
|
|
#ifdef COROUTINING
|
|
CELL *dvars = NULL;
|
|
#endif
|
|
HB = HLow;
|
|
to_visit0 = to_visit;
|
|
loop:
|
|
while (pt0 < pt0_end) {
|
|
register CELL d0;
|
|
register CELL *ptd0;
|
|
++ pt0;
|
|
ptd0 = pt0;
|
|
d0 = *ptd0;
|
|
deref_head(d0, copy_term_unk);
|
|
copy_term_nvar:
|
|
{
|
|
if (IsPairTerm(d0)) {
|
|
CELL *ap2 = RepPair(d0);
|
|
if (ap2 >= HB && ap2 < H) {
|
|
/* If this is newer than the current term, just reuse */
|
|
*ptf++ = d0;
|
|
continue;
|
|
}
|
|
*ptf = AbsPair(H);
|
|
ptf++;
|
|
#ifdef RATIONAL_TREES
|
|
if (to_visit + 4 >= (CELL **)AuxSp) {
|
|
goto heap_overflow;
|
|
}
|
|
to_visit[0] = pt0;
|
|
to_visit[1] = pt0_end;
|
|
to_visit[2] = ptf;
|
|
to_visit[3] = (CELL *)*pt0;
|
|
/* fool the system into thinking we had a variable there */
|
|
*pt0 = AbsPair(H);
|
|
to_visit += 4;
|
|
#else
|
|
if (pt0 < pt0_end) {
|
|
if (to_visit + 3 >= (CELL **)AuxSp) {
|
|
goto heap_overflow;
|
|
}
|
|
to_visit[0] = pt0;
|
|
to_visit[1] = pt0_end;
|
|
to_visit[2] = ptf;
|
|
to_visit += 3;
|
|
}
|
|
#endif
|
|
pt0 = ap2 - 1;
|
|
pt0_end = ap2 + 1;
|
|
ptf = H;
|
|
H += 2;
|
|
if (H > ASP - 128) {
|
|
goto overflow;
|
|
}
|
|
} else if (IsApplTerm(d0)) {
|
|
register Functor f;
|
|
register CELL *ap2;
|
|
/* store the terms to visit */
|
|
ap2 = RepAppl(d0);
|
|
if (ap2 >= HB && ap2 < H) {
|
|
/* If this is newer than the current term, just reuse */
|
|
*ptf++ = d0;
|
|
continue;
|
|
}
|
|
f = (Functor)(*ap2);
|
|
|
|
if (IsExtensionFunctor(f)) {
|
|
switch((CELL)f) {
|
|
case (CELL)FunctorDBRef:
|
|
*ptf++ = d0;
|
|
break;
|
|
case (CELL)FunctorLongInt:
|
|
if (H > ASP - (128+3)) {
|
|
goto overflow;
|
|
}
|
|
*ptf++ = AbsAppl(H);
|
|
H[0] = (CELL)f;
|
|
H[1] = ap2[1];
|
|
H[2] = EndSpecials;
|
|
H += 3;
|
|
break;
|
|
case (CELL)FunctorDouble:
|
|
if (H > ASP - (128+(2+SIZEOF_DOUBLE/sizeof(CELL)))) {
|
|
goto overflow;
|
|
}
|
|
*ptf++ = AbsAppl(H);
|
|
H[0] = (CELL)f;
|
|
H[1] = ap2[1];
|
|
#if SIZEOF_DOUBLE == 2*SIZEOF_LONG_INT
|
|
H[2] = ap2[2];
|
|
H[3] = EndSpecials;
|
|
H += 4;
|
|
#else
|
|
H[2] = EndSpecials;
|
|
H += 3;
|
|
#endif
|
|
break;
|
|
default:
|
|
{
|
|
/* big int */
|
|
UInt sz = ArenaSz(d0), i;
|
|
|
|
if (H > ASP - (128+sz)) {
|
|
goto overflow;
|
|
}
|
|
*ptf++ = AbsAppl(H);
|
|
H[0] = (CELL)f;
|
|
for (i = 1; i < sz; i++) {
|
|
H[i] = ap2[i];
|
|
}
|
|
H += sz;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
*ptf = AbsAppl(H);
|
|
ptf++;
|
|
/* store the terms to visit */
|
|
#ifdef RATIONAL_TREES
|
|
if (to_visit + 4 >= (CELL **)AuxSp) {
|
|
goto heap_overflow;
|
|
}
|
|
to_visit[0] = pt0;
|
|
to_visit[1] = pt0_end;
|
|
to_visit[2] = ptf;
|
|
to_visit[3] = (CELL *)*pt0;
|
|
/* fool the system into thinking we had a variable there */
|
|
*pt0 = AbsAppl(H);
|
|
to_visit += 4;
|
|
#else
|
|
if (pt0 < pt0_end) {
|
|
if (to_visit + 3 >= (CELL **)AuxSp) {
|
|
goto heap_overflow;
|
|
}
|
|
to_visit[0] = pt0;
|
|
to_visit[1] = pt0_end;
|
|
to_visit[2] = ptf;
|
|
to_visit += 3;
|
|
}
|
|
#endif
|
|
d0 = ArityOfFunctor(f);
|
|
pt0 = ap2;
|
|
pt0_end = ap2 + d0;
|
|
/* store the functor for the new term */
|
|
H[0] = (CELL)f;
|
|
ptf = H+1;
|
|
H += 1+d0;
|
|
if (H > ASP - 128) {
|
|
goto overflow;
|
|
}
|
|
} else {
|
|
/* just copy atoms or integers */
|
|
*ptf++ = d0;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
derefa_body(d0, ptd0, copy_term_unk, copy_term_nvar);
|
|
if (ptd0 >= HLow && ptd0 < H) {
|
|
/* we have already found this cell */
|
|
*ptf++ = (CELL) ptd0;
|
|
} else {
|
|
#if COROUTINING
|
|
if (IsAttachedTerm((CELL)ptd0)) {
|
|
/* if unbound, call the standard copy term routine */
|
|
CELL **bp[1];
|
|
|
|
if (dvars == NULL) {
|
|
dvars = (CELL *)DelayArenaPt(*att_arenap);
|
|
}
|
|
if (ptd0 < dvars &&
|
|
ptd0 >= (CELL *)DelayArenaPt(*att_arenap)) {
|
|
*ptf++ = (CELL) ptd0;
|
|
} else {
|
|
tr_fr_ptr CurTR;
|
|
|
|
CurTR = TR;
|
|
bp[0] = to_visit;
|
|
HB = HB0;
|
|
if (!CopyAttVar(ptd0, bp, ptf, att_arenap)) {
|
|
goto delay_overflow;
|
|
}
|
|
if (H > ASP - 128) {
|
|
goto overflow;
|
|
}
|
|
to_visit = bp[0];
|
|
HB = HLow;
|
|
ptf++;
|
|
if ((ADDR)TR > Yap_TrailTop-128)
|
|
goto trail_overflow;
|
|
Bind_and_Trail(ptd0, ptf[-1]);
|
|
}
|
|
} else {
|
|
#endif
|
|
/* first time we met this term */
|
|
RESET_VARIABLE(ptf);
|
|
if ((ADDR)TR > Yap_TrailTop-128)
|
|
goto trail_overflow;
|
|
Bind_and_Trail(ptd0, (CELL)ptf);
|
|
ptf++;
|
|
#ifdef COROUTINING
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
/* Do we still have compound terms to visit */
|
|
if (to_visit > to_visit0) {
|
|
#ifdef RATIONAL_TREES
|
|
to_visit -= 4;
|
|
pt0 = to_visit[0];
|
|
pt0_end = to_visit[1];
|
|
ptf = to_visit[2];
|
|
*pt0 = (CELL)to_visit[3];
|
|
#else
|
|
to_visit -= 3;
|
|
pt0 = to_visit[0];
|
|
pt0_end = to_visit[1];
|
|
ptf = to_visit[2];
|
|
#endif
|
|
goto loop;
|
|
}
|
|
|
|
/* restore our nice, friendly, term to its original state */
|
|
HB = HB0;
|
|
clean_dirty_tr(TR0);
|
|
return 0;
|
|
|
|
overflow:
|
|
/* oops, we're in trouble */
|
|
H = HLow;
|
|
/* we've done it */
|
|
/* restore our nice, friendly, term to its original state */
|
|
HB = HB0;
|
|
#ifdef RATIONAL_TREES
|
|
while (to_visit > to_visit0) {
|
|
to_visit -= 4;
|
|
pt0 = to_visit[0];
|
|
pt0_end = to_visit[1];
|
|
ptf = to_visit[2];
|
|
*pt0 = (CELL)to_visit[3];
|
|
}
|
|
#endif
|
|
reset_trail(TR0);
|
|
return -1;
|
|
|
|
heap_overflow:
|
|
/* oops, we're in trouble */
|
|
H = HLow;
|
|
/* we've done it */
|
|
/* restore our nice, friendly, term to its original state */
|
|
HB = HB0;
|
|
#ifdef RATIONAL_TREES
|
|
while (to_visit > to_visit0) {
|
|
to_visit -= 4;
|
|
pt0 = to_visit[0];
|
|
pt0_end = to_visit[1];
|
|
ptf = to_visit[2];
|
|
*pt0 = (CELL)to_visit[3];
|
|
}
|
|
#endif
|
|
reset_trail(TR0);
|
|
return -2;
|
|
|
|
|
|
#if COROUTINING
|
|
delay_overflow:
|
|
/* oops, we're in trouble */
|
|
H = HLow;
|
|
/* we've done it */
|
|
/* restore our nice, friendly, term to its original state */
|
|
HB = HB0;
|
|
#ifdef RATIONAL_TREES
|
|
while (to_visit > to_visit0) {
|
|
to_visit -= 4;
|
|
pt0 = to_visit[0];
|
|
pt0_end = to_visit[1];
|
|
ptf = to_visit[2];
|
|
*pt0 = (CELL)to_visit[3];
|
|
}
|
|
#endif
|
|
reset_trail(TR0);
|
|
return -3;
|
|
#endif
|
|
|
|
trail_overflow:
|
|
/* oops, we're in trouble */
|
|
H = HLow;
|
|
/* we've done it */
|
|
/* restore our nice, friendly, term to its original state */
|
|
HB = HB0;
|
|
#ifdef RATIONAL_TREES
|
|
while (to_visit > to_visit0) {
|
|
to_visit -= 4;
|
|
pt0 = to_visit[0];
|
|
pt0_end = to_visit[1];
|
|
ptf = to_visit[2];
|
|
*pt0 = (CELL)to_visit[3];
|
|
}
|
|
#endif
|
|
reset_trail(TR0);
|
|
return -4;
|
|
}
|
|
|
|
static Term
|
|
CopyTermToArena(Term t, Term arena, UInt arity, Term *newarena, Term *att_arenap, Int min_grow)
|
|
{
|
|
UInt old_size = ArenaSz(arena);
|
|
CELL *oldH = H;
|
|
CELL *oldHB = HB;
|
|
CELL *oldASP = ASP;
|
|
int res;
|
|
#if COROUTINING
|
|
Term old_delay_arena;
|
|
#endif
|
|
|
|
restart:
|
|
#if COROUTINING
|
|
old_delay_arena = *att_arenap;
|
|
#endif
|
|
t = Deref(t);
|
|
if (IsVarTerm(t)) {
|
|
ASP = ArenaLimit(arena);
|
|
H = HB = ArenaPt(arena);
|
|
#if COROUTINING
|
|
if (IsAttachedTerm(t)) {
|
|
CELL *Hi;
|
|
|
|
*H = t;
|
|
Hi = H+1;
|
|
H += 2;
|
|
if ((res = copy_complex_term(Hi-2, Hi-1, Hi, Hi, att_arenap)) < 0)
|
|
goto error_handler;
|
|
CloseArena(oldH, oldHB, oldASP, newarena, old_size);
|
|
return Hi[0];
|
|
}
|
|
#endif
|
|
Term tn = MkVarTerm();
|
|
if (H > ASP - 128) {
|
|
res = -1;
|
|
goto error_handler;
|
|
}
|
|
CloseArena(oldH, oldHB, oldASP, newarena, old_size);
|
|
return tn;
|
|
} else if (IsAtomOrIntTerm(t)) {
|
|
return t;
|
|
} else if (IsPairTerm(t)) {
|
|
Term tf;
|
|
CELL *ap;
|
|
CELL *Hi;
|
|
|
|
H = HB = ArenaPt(arena);
|
|
ASP = ArenaLimit(arena);
|
|
ap = RepPair(t);
|
|
Hi = H;
|
|
tf = AbsPair(H);
|
|
H += 2;
|
|
if ((res = copy_complex_term(ap-1, ap+1, Hi, Hi, att_arenap)) < 0) {
|
|
goto error_handler;
|
|
}
|
|
CloseArena(oldH, oldHB, oldASP, newarena, old_size);
|
|
return tf;
|
|
} else {
|
|
Functor f;
|
|
Term tf;
|
|
CELL *HB0;
|
|
CELL *ap;
|
|
|
|
H = HB = ArenaPt(arena);
|
|
ASP = ArenaLimit(arena);
|
|
f = FunctorOfTerm(t);
|
|
HB0 = H;
|
|
ap = RepAppl(t);
|
|
tf = AbsAppl(H);
|
|
H[0] = (CELL)f;
|
|
if (IsExtensionFunctor(f)) {
|
|
switch((CELL)f) {
|
|
case (CELL)FunctorDBRef:
|
|
CloseArena(oldH, oldHB, oldASP, newarena, old_size);
|
|
return t;
|
|
case (CELL)FunctorLongInt:
|
|
if (H > ASP - (128+3)) {
|
|
res = -1;
|
|
goto error_handler;
|
|
}
|
|
H[1] = ap[1];
|
|
H[2] = EndSpecials;
|
|
H += 3;
|
|
break;
|
|
case (CELL)FunctorDouble:
|
|
if (H > ASP - (128+(2+SIZEOF_DOUBLE/sizeof(CELL)))) {
|
|
res = -1;
|
|
goto error_handler;
|
|
}
|
|
H[1] = ap[1];
|
|
#if SIZEOF_DOUBLE == 2*SIZEOF_LONG_INT
|
|
H[2] = ap[2];
|
|
H[3] = EndSpecials;
|
|
H += 4;
|
|
#else
|
|
H[2] = EndSpecials;
|
|
H += 3;
|
|
#endif
|
|
break;
|
|
default:
|
|
{
|
|
UInt sz = ArenaSz(t), i;
|
|
|
|
if (H > ASP - (128+sz)) {
|
|
res = -1;
|
|
goto error_handler;
|
|
}
|
|
for (i = 1; i < sz; i++) {
|
|
H[i] = ap[i];
|
|
}
|
|
H += sz;
|
|
}
|
|
}
|
|
} else {
|
|
H += 1+ArityOfFunctor(f);
|
|
if (H > ASP-128) {
|
|
res = -1;
|
|
goto error_handler;
|
|
}
|
|
if ((res = copy_complex_term(ap, ap+ArityOfFunctor(f), HB0+1, HB0, att_arenap)) < 0) {
|
|
goto error_handler;
|
|
}
|
|
}
|
|
CloseArena(oldH, oldHB, oldASP, newarena, old_size);
|
|
return tf;
|
|
}
|
|
error_handler:
|
|
H = HB;
|
|
CloseArena(oldH, oldHB, oldASP, newarena, old_size);
|
|
#if COROUTINING
|
|
if (old_delay_arena != MkIntTerm(0))
|
|
ResetDelayArena(old_delay_arena, att_arenap);
|
|
#endif
|
|
XREGS[arity+1] = t;
|
|
XREGS[arity+2] = arena;
|
|
XREGS[arity+3] = (CELL)newarena;
|
|
XREGS[arity+4] = (CELL)att_arenap;
|
|
{
|
|
CELL *old_top = ArenaLimit(*newarena);
|
|
ASP = oldASP;
|
|
H = oldH;
|
|
HB = oldHB;
|
|
switch (res) {
|
|
case -1:
|
|
/* handle arena overflow */
|
|
if (!GrowArena(arena, old_top, old_size, min_grow, arity+4)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
|
|
return 0L;
|
|
}
|
|
break;
|
|
#if COROUTINING
|
|
case -3:
|
|
/* handle delay arena overflow */
|
|
old_size = DelayArenaSz(*att_arenap);
|
|
|
|
if (!GrowDelayArena(att_arenap, old_size, 0L, arity+4)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
|
|
return 0L;
|
|
}
|
|
break;
|
|
#endif
|
|
case -4:
|
|
/* handle trail overflow */
|
|
if(!Yap_growtrail (sizeof(CELL) * 16 * 1024L, FALSE)) {
|
|
Yap_Error(OUT_OF_TRAIL_ERROR, TermNil, Yap_ErrorMessage);
|
|
return 0L;
|
|
}
|
|
break;
|
|
default: /* temporary space overflow */
|
|
if (!Yap_ExpandPreAllocCodeSpace(0,NULL)) {
|
|
Yap_Error(OUT_OF_AUXSPACE_ERROR, TermNil, Yap_ErrorMessage);
|
|
return 0L;
|
|
}
|
|
}
|
|
}
|
|
oldH = H;
|
|
oldHB = HB;
|
|
oldASP = ASP;
|
|
att_arenap = (Term *)XREGS[arity+4];
|
|
newarena = (CELL *)XREGS[arity+3];
|
|
arena = Deref(XREGS[arity+2]);
|
|
t = XREGS[arity+1];
|
|
old_size = ArenaSz(arena);
|
|
goto restart;
|
|
}
|
|
|
|
inline static GlobalEntry *
|
|
FindGlobalEntry(Atom at)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
|
|
{
|
|
Prop p0;
|
|
AtomEntry *ae = RepAtom(at);
|
|
|
|
READ_LOCK(ae->ARWLock);
|
|
p0 = ae->PropsOfAE;
|
|
while (p0) {
|
|
GlobalEntry *pe = RepGlobalProp(p0);
|
|
if ( pe->KindOfPE == GlobalProperty
|
|
#if THREADS
|
|
&& pe->owner_id == worker_id
|
|
#endif
|
|
) {
|
|
READ_UNLOCK(ae->ARWLock);
|
|
return pe;
|
|
}
|
|
p0 = pe->NextOfPE;
|
|
}
|
|
READ_UNLOCK(ae->ARWLock);
|
|
return NULL;
|
|
}
|
|
|
|
inline static GlobalEntry *
|
|
GetGlobalEntry(Atom at)
|
|
/* get predicate entry for ap/arity; create it if neccessary. */
|
|
{
|
|
Prop p0;
|
|
AtomEntry *ae = RepAtom(at);
|
|
GlobalEntry *new;
|
|
|
|
WRITE_LOCK(ae->ARWLock);
|
|
p0 = ae->PropsOfAE;
|
|
while (p0) {
|
|
GlobalEntry *pe = RepGlobalProp(p0);
|
|
if ( pe->KindOfPE == GlobalProperty
|
|
#if THREADS
|
|
&& pe->owner_id == worker_id
|
|
#endif
|
|
) {
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return pe;
|
|
}
|
|
p0 = pe->NextOfPE;
|
|
}
|
|
new = (GlobalEntry *) Yap_AllocAtomSpace(sizeof(*new));
|
|
INIT_RWLOCK(new->GRWLock);
|
|
new->KindOfPE = GlobalProperty;
|
|
#if THREADS
|
|
new->owner_id = worker_id;
|
|
#endif
|
|
new->NextGE = GlobalVariables;
|
|
GlobalVariables = new;
|
|
new->AtomOfGE = ae;
|
|
new->NextOfPE = ae->PropsOfAE;
|
|
ae->PropsOfAE = AbsGlobalProp(new);
|
|
RESET_VARIABLE(&new->global);
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
return new;
|
|
}
|
|
|
|
|
|
|
|
static Int
|
|
p_nb_setval(void)
|
|
{
|
|
Term t = Deref(ARG1), to;
|
|
GlobalEntry *ge;
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"nb_setval");
|
|
return (TermNil);
|
|
} else if (!IsAtomTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_ATOM,t,"nb_setval");
|
|
return (FALSE);
|
|
}
|
|
ge = GetGlobalEntry(AtomOfTerm(t));
|
|
to = CopyTermToArena(ARG2, GlobalArena, 2, &GlobalArena, &GlobalDelayArena, 0);
|
|
if (to == 0L)
|
|
return FALSE;
|
|
WRITE_LOCK(ge->GRWLock);
|
|
ge->global=to;
|
|
WRITE_UNLOCK(ge->GRWLock);
|
|
return TRUE;
|
|
}
|
|
|
|
static Int
|
|
p_b_setval(void)
|
|
{
|
|
Term t = Deref(ARG1);
|
|
GlobalEntry *ge;
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"b_setval");
|
|
return (TermNil);
|
|
} else if (!IsAtomTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_ATOM,t,"b_setval");
|
|
return (FALSE);
|
|
}
|
|
ge = GetGlobalEntry(AtomOfTerm(t));
|
|
WRITE_LOCK(ge->GRWLock);
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
/* the evil deed is to be done now */
|
|
MaBind(&ge->global, ARG2);
|
|
WRITE_UNLOCK(ge->GRWLock);
|
|
return TRUE;
|
|
#else
|
|
WRITE_UNLOCK(ge->GRWLock);
|
|
Yap_Error(SYSTEM_ERROR,t2,"update_array");
|
|
return FALSE;
|
|
#endif
|
|
}
|
|
|
|
static Int
|
|
p_nb_getval(void)
|
|
{
|
|
Term t = Deref(ARG1), to;
|
|
GlobalEntry *ge;
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"nb_getval");
|
|
return FALSE;
|
|
} else if (!IsAtomTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_ATOM,t,"nb_getval");
|
|
return FALSE;
|
|
}
|
|
ge = FindGlobalEntry(AtomOfTerm(t));
|
|
if (!ge)
|
|
return FALSE;
|
|
READ_LOCK(ge->GRWLock);
|
|
to = ge->global;
|
|
READ_UNLOCK(ge->GRWLock);
|
|
return Yap_unify(ARG2, to);
|
|
}
|
|
|
|
static Int
|
|
p_nb_delete(void)
|
|
{
|
|
Term t = Deref(ARG1);
|
|
GlobalEntry *ge, *g;
|
|
AtomEntry *ae;
|
|
Prop gp, g0;
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,"nb_delete");
|
|
return FALSE;
|
|
} else if (!IsAtomTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_ATOM,t,"nb_delete");
|
|
return FALSE;
|
|
}
|
|
ge = FindGlobalEntry(AtomOfTerm(t));
|
|
if (!ge)
|
|
return FALSE;
|
|
WRITE_LOCK(ge->GRWLock);
|
|
ae = ge->AtomOfGE;
|
|
if (GlobalVariables == ge) {
|
|
GlobalVariables = ge->NextGE;
|
|
} else {
|
|
g = GlobalVariables;
|
|
while (g->NextGE != ge)
|
|
g = g->NextGE;
|
|
g->NextGE = ge->NextGE;
|
|
}
|
|
gp = AbsGlobalProp(ge);
|
|
WRITE_LOCK(ae->ARWLock);
|
|
if (ae->PropsOfAE == gp) {
|
|
ae->PropsOfAE = ge->NextOfPE;
|
|
} else {
|
|
g0 = ae->PropsOfAE;
|
|
while (g0->NextOfPE != gp)
|
|
g0 = g0->NextOfPE;
|
|
g0->NextOfPE = ge->NextOfPE;
|
|
}
|
|
WRITE_UNLOCK(ae->ARWLock);
|
|
WRITE_UNLOCK(ge->GRWLock);
|
|
Yap_FreeCodeSpace((char *)ge);
|
|
return TRUE;
|
|
}
|
|
|
|
/* a non-backtrackable queue is a term of the form $array(Arena,Start,End,Size) plus an Arena. */
|
|
|
|
static Int
|
|
p_nb_queue(void)
|
|
{
|
|
Term queue_arena, queue, ar[5], *nar;
|
|
#if COROUTINING
|
|
Term delay_queue_arena;
|
|
#endif
|
|
Term t = Deref(ARG1);
|
|
UInt arena_sz = (H-H0)/16;
|
|
|
|
if (!IsVarTerm(t)) {
|
|
if (!IsApplTerm(t)) {
|
|
return FALSE;
|
|
}
|
|
return (FunctorOfTerm(t) == FunctorNBQueue);
|
|
}
|
|
ar[QUEUE_ARENA] =
|
|
ar[QUEUE_DELAY_ARENA] =
|
|
ar[QUEUE_HEAD] =
|
|
ar[QUEUE_TAIL] =
|
|
ar[QUEUE_SIZE] =
|
|
MkIntTerm(0);
|
|
queue = Yap_MkApplTerm(FunctorNBQueue,5,ar);
|
|
if (!Yap_unify(queue,ARG1))
|
|
return FALSE;
|
|
#if COROUTINING
|
|
arena_sz = ((attvar_record *)H0- DelayTop())/16;
|
|
if (arena_sz <2)
|
|
arena_sz = 2;
|
|
if (arena_sz > 256)
|
|
arena_sz = 256;
|
|
delay_queue_arena = NewDelayArena(arena_sz);
|
|
if (delay_queue_arena == 0L) {
|
|
return FALSE;
|
|
}
|
|
nar = RepAppl(Deref(ARG1))+1;
|
|
nar[QUEUE_DELAY_ARENA] = delay_queue_arena;
|
|
#endif
|
|
if (arena_sz < 4*1024)
|
|
arena_sz = 4*1024;
|
|
queue_arena = NewArena(arena_sz,1,NULL);
|
|
if (queue_arena == 0L) {
|
|
return FALSE;
|
|
}
|
|
nar = RepAppl(Deref(ARG1))+1;
|
|
nar[QUEUE_ARENA] = queue_arena;
|
|
return TRUE;
|
|
}
|
|
|
|
static CELL *
|
|
GetQueue(Term t, char* caller)
|
|
{
|
|
t = Deref(t);
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,caller);
|
|
return NULL;
|
|
}
|
|
if (!IsApplTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_COMPOUND,t,caller);
|
|
return NULL;
|
|
}
|
|
if (FunctorOfTerm(t) != FunctorNBQueue) {
|
|
Yap_Error(DOMAIN_ERROR_ARRAY_TYPE,t,caller);
|
|
return NULL;
|
|
}
|
|
return RepAppl(t)+1;
|
|
}
|
|
|
|
static Term
|
|
GetQueueArena(CELL *qd, char* caller)
|
|
{
|
|
Term t = Deref(qd[QUEUE_ARENA]);
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,caller);
|
|
return 0L;
|
|
}
|
|
if (!IsApplTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_COMPOUND,t,caller);
|
|
return 0L;
|
|
}
|
|
if (FunctorOfTerm(t) != FunctorBigInt) {
|
|
Yap_Error(DOMAIN_ERROR_ARRAY_TYPE,t,caller);
|
|
return 0L;
|
|
}
|
|
return t;
|
|
}
|
|
|
|
#if COROUTINING
|
|
static void
|
|
RecoverDelayArena(Term delay_arena)
|
|
{
|
|
attvar_record *pt = DelayArenaPt(delay_arena),
|
|
*max = DelayTop();
|
|
|
|
if (max == pt-DelayArenaSz(delay_arena))
|
|
SetDelayTop(pt);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
RecoverArena(Term arena)
|
|
{
|
|
CELL *pt = ArenaPt(arena),
|
|
*max = ArenaLimit(arena);
|
|
|
|
if (max == H)
|
|
H = pt;
|
|
}
|
|
|
|
static Int
|
|
p_nb_queue_close(void)
|
|
{
|
|
Term t = Deref(ARG1);
|
|
Int out;
|
|
|
|
if (!IsVarTerm(t)) {
|
|
CELL *qp;
|
|
|
|
qp = GetQueue(t, "queue/3");
|
|
if (qp == NULL) {
|
|
return
|
|
Yap_unify(ARG3, ARG2);
|
|
}
|
|
if (qp[QUEUE_ARENA] != MkIntTerm(0))
|
|
RecoverArena(qp[QUEUE_ARENA]);
|
|
#if COROUTINING
|
|
if (qp[QUEUE_DELAY_ARENA] != MkIntTerm(0))
|
|
RecoverDelayArena(qp[QUEUE_DELAY_ARENA]);
|
|
#endif
|
|
if (qp[QUEUE_SIZE] == MkIntTerm(0)) {
|
|
return
|
|
Yap_unify(ARG3, ARG2);
|
|
}
|
|
out =
|
|
Yap_unify(ARG3, qp[QUEUE_TAIL]) &&
|
|
Yap_unify(ARG2, qp[QUEUE_HEAD]);
|
|
qp[-1] = (CELL)Yap_MkFunctor(Yap_LookupAtom("heap"),1);
|
|
qp[0] = MkIntegerTerm(0);
|
|
return out;
|
|
}
|
|
Yap_Error(INSTANTIATION_ERROR,t,"queue/3");
|
|
return FALSE;
|
|
}
|
|
|
|
static Int
|
|
p_nb_queue_enqueue(void)
|
|
{
|
|
CELL *qd = GetQueue(ARG1,"enqueue"), *oldH, *oldHB;
|
|
UInt old_sz;
|
|
Term arena, qsize, to;
|
|
UInt min_size;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
arena = GetQueueArena(qd,"enqueue");
|
|
if (arena == 0L)
|
|
return FALSE;
|
|
if (IsPairTerm(qd[QUEUE_HEAD])) {
|
|
min_size = ArenaPt(arena)-RepPair(qd[QUEUE_HEAD]);
|
|
} else {
|
|
min_size = 0L;
|
|
}
|
|
to = CopyTermToArena(ARG2, arena, 2, qd+QUEUE_ARENA, qd+QUEUE_DELAY_ARENA, min_size);
|
|
if (to == 0L)
|
|
return FALSE;
|
|
qd = GetQueue(ARG1,"enqueue");
|
|
arena = GetQueueArena(qd,"enqueue");
|
|
/* garbage collection ? */
|
|
oldH = H;
|
|
oldHB = HB;
|
|
H = HB = ArenaPt(arena);
|
|
old_sz = ArenaSz(arena);
|
|
qsize = IntegerOfTerm(qd[QUEUE_SIZE]);
|
|
while (old_sz < 128) {
|
|
UInt gsiz = H-RepPair(qd[QUEUE_HEAD]);
|
|
H = oldH;
|
|
HB = oldHB;
|
|
if (gsiz > 1024*1024) {
|
|
gsiz = 1024*1024;
|
|
} else if (gsiz < 1024) {
|
|
gsiz = 1024;
|
|
}
|
|
ARG3 = to;
|
|
fprintf(stderr,"growing %ld cells\n",(unsigned long int)gsiz);
|
|
if (!GrowArena(arena, ArenaLimit(arena), old_sz, gsiz, 3)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, arena, Yap_ErrorMessage);
|
|
return 0L;
|
|
}
|
|
to = ARG3;
|
|
qd = RepAppl(Deref(ARG1))+1;
|
|
arena = GetQueueArena(qd,"enqueue");
|
|
oldH = H;
|
|
oldHB = HB;
|
|
H = HB = ArenaPt(arena);
|
|
old_sz = ArenaSz(arena);
|
|
}
|
|
qd[QUEUE_SIZE] = Global_MkIntegerTerm(qsize+1);
|
|
if (qsize == 0) {
|
|
qd[QUEUE_HEAD] = AbsPair(H);
|
|
} else {
|
|
*VarOfTerm(qd[QUEUE_TAIL]) = AbsPair(H);
|
|
}
|
|
*H++ = to;
|
|
RESET_VARIABLE(H);
|
|
qd[QUEUE_TAIL] = (CELL)H;
|
|
H++;
|
|
CloseArena(oldH, oldHB, ASP, qd+QUEUE_ARENA, old_sz);
|
|
return TRUE;
|
|
}
|
|
|
|
static Int
|
|
p_nb_queue_dequeue(void)
|
|
{
|
|
CELL *qd = GetQueue(ARG1,"dequeue");
|
|
UInt old_sz, qsz;
|
|
Term arena, out;
|
|
CELL *oldH, *oldHB;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
qsz = IntegerOfTerm(qd[QUEUE_SIZE]);
|
|
if (qsz == 0)
|
|
return FALSE;
|
|
arena = GetQueueArena(qd,"dequeue");
|
|
if (arena == 0L)
|
|
return FALSE;
|
|
old_sz = ArenaSz(arena);
|
|
out = HeadOfTerm(qd[QUEUE_HEAD]);
|
|
qd[QUEUE_HEAD] = TailOfTerm(qd[QUEUE_HEAD]);
|
|
/* garbage collection ? */
|
|
oldH = H;
|
|
oldHB = HB;
|
|
qd[QUEUE_SIZE] = Global_MkIntegerTerm(qsz-1);
|
|
CloseArena(oldH, oldHB, ASP, &arena, old_sz);
|
|
return Yap_unify(out, ARG2);
|
|
}
|
|
|
|
static Int
|
|
p_nb_queue_peek(void)
|
|
{
|
|
CELL *qd = GetQueue(ARG1,"queue_peek");
|
|
UInt qsz;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
qsz = IntegerOfTerm(qd[QUEUE_SIZE]);
|
|
if (qsz == 0)
|
|
return FALSE;
|
|
return Yap_unify(HeadOfTerm(qd[QUEUE_HEAD]), ARG2);
|
|
}
|
|
|
|
static Int
|
|
p_nb_queue_empty(void)
|
|
{
|
|
CELL *qd = GetQueue(ARG1,"queue_empty");
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
return (IntegerOfTerm(qd[QUEUE_SIZE]) == 0);
|
|
}
|
|
|
|
static Int
|
|
p_nb_queue_size(void)
|
|
{
|
|
CELL *qd = GetQueue(ARG1,"queue_size");
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
return Yap_unify(ARG2,qd[QUEUE_SIZE]);
|
|
}
|
|
|
|
|
|
static CELL *
|
|
GetHeap(Term t, char* caller)
|
|
{
|
|
t = Deref(t);
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR,t,caller);
|
|
return NULL;
|
|
}
|
|
if (!IsApplTerm(t)) {
|
|
Yap_Error(TYPE_ERROR_COMPOUND,t,caller);
|
|
return NULL;
|
|
}
|
|
return RepAppl(t)+1;
|
|
}
|
|
|
|
static Term
|
|
MkZeroApplTerm(Functor f, UInt sz)
|
|
{
|
|
Term t0, tf;
|
|
CELL *pt;
|
|
|
|
if (H+(sz+1) > ASP-1024)
|
|
return TermNil;
|
|
tf = AbsAppl(H);
|
|
*H = (CELL)f;
|
|
t0 = MkIntTerm(0);
|
|
pt = H+1;
|
|
while (sz--) {
|
|
*pt++ = t0;
|
|
}
|
|
H = pt;
|
|
return tf;
|
|
}
|
|
|
|
static Int
|
|
p_nb_heap(void)
|
|
{
|
|
Term heap_arena, heap, *ar, *nar;
|
|
#if COROUTINING
|
|
Term delay_heap_arena;
|
|
#endif
|
|
UInt hsize;
|
|
Term tsize = Deref(ARG1);
|
|
UInt arena_sz = (H-H0)/16;
|
|
|
|
if (IsVarTerm(tsize)) {
|
|
Yap_Error(INSTANTIATION_ERROR,tsize,"nb_heap");
|
|
return FALSE;
|
|
} else {
|
|
if (!IsIntegerTerm(tsize)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER,tsize,"nb_heap");
|
|
return FALSE;
|
|
}
|
|
hsize = IntegerOfTerm(tsize);
|
|
}
|
|
|
|
while ((heap = MkZeroApplTerm(Yap_MkFunctor(Yap_LookupAtom("heap"),2*hsize+HEAP_START+1),2*hsize+HEAP_START+1)) == TermNil) {
|
|
if (!Yap_gcl((2*hsize+HEAP_START+1)*sizeof(CELL), 2, ENV, P)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
|
|
return FALSE;
|
|
}
|
|
}
|
|
if (!Yap_unify(heap,ARG2))
|
|
return FALSE;
|
|
ar = RepAppl(heap)+1;
|
|
ar[HEAP_ARENA] =
|
|
ar[HEAP_DELAY_ARENA] =
|
|
ar[HEAP_SIZE] =
|
|
MkIntTerm(0);
|
|
ar[HEAP_MAX] = tsize;
|
|
if (arena_sz < 1024)
|
|
arena_sz = 1024;
|
|
heap_arena = NewArena(arena_sz,1,NULL);
|
|
if (heap_arena == 0L) {
|
|
return FALSE;
|
|
}
|
|
nar = RepAppl(Deref(ARG2))+1;
|
|
nar[HEAP_ARENA] = heap_arena;
|
|
#if COROUTINING
|
|
arena_sz = ((attvar_record *)H0- DelayTop())/16;
|
|
if (arena_sz <2)
|
|
arena_sz = 2;
|
|
if (arena_sz > 256)
|
|
arena_sz = 256;
|
|
delay_heap_arena = NewDelayArena(arena_sz);
|
|
if (delay_heap_arena == 0L) {
|
|
return FALSE;
|
|
}
|
|
nar = RepAppl(Deref(ARG2))+1;
|
|
nar[HEAP_DELAY_ARENA] = delay_heap_arena;
|
|
#endif
|
|
return TRUE;
|
|
}
|
|
|
|
static Int
|
|
p_nb_heap_close(void)
|
|
{
|
|
Term t = Deref(ARG1);
|
|
if (!IsVarTerm(t)) {
|
|
CELL *qp;
|
|
|
|
qp = RepAppl(t)+1;
|
|
if (qp[HEAP_ARENA] != MkIntTerm(0))
|
|
RecoverArena(qp[HEAP_ARENA]);
|
|
#if COROUTINING
|
|
if (qp[HEAP_DELAY_ARENA] != MkIntTerm(0))
|
|
RecoverDelayArena(qp[HEAP_DELAY_ARENA]);
|
|
#endif
|
|
qp[-1] = (CELL)Yap_MkFunctor(Yap_LookupAtom("heap"),1);
|
|
qp[0] = MkIntegerTerm(0);
|
|
return TRUE;
|
|
}
|
|
Yap_Error(INSTANTIATION_ERROR,t,"heap_close/1");
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
PushHeap(CELL *pt, UInt off)
|
|
{
|
|
while (off) {
|
|
UInt noff = (off+1)/2-1;
|
|
if (Yap_compare_terms(pt[2*off], pt[2*noff]) < 0) {
|
|
Term tk = pt[2*noff];
|
|
Term tv = pt[2*noff+1];
|
|
pt[2*noff] = pt[2*off];
|
|
pt[2*noff+1] = pt[2*off+1];
|
|
pt[2*off] = tk;
|
|
pt[2*off+1] = tv;
|
|
off = noff;
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
DelHeapRoot(CELL *pt, UInt sz)
|
|
{
|
|
UInt indx = 0;
|
|
Term tk, tv;
|
|
|
|
sz--;
|
|
tk = pt[2*sz];
|
|
tv = pt[2*sz+1];
|
|
while (TRUE) {
|
|
if (sz < 2*indx+3 || Yap_compare_terms(pt[4*indx+2],pt[4*indx+4]) < 0) {
|
|
if (sz < 2*indx+2 || Yap_compare_terms(tk, pt[4*indx+2]) < 0) {
|
|
pt[2*indx] = tk;
|
|
pt[2*indx+1] = tv;
|
|
return;
|
|
} else {
|
|
pt[2*indx] = pt[4*indx+2];
|
|
pt[2*indx+1] = pt[4*indx+3];
|
|
indx = 2*indx+1;
|
|
}
|
|
} else {
|
|
if (Yap_compare_terms(tk, pt[4*indx+4]) < 0) {
|
|
pt[2*indx] = tk;
|
|
pt[2*indx+1] = tv;
|
|
return;
|
|
} else {
|
|
pt[2*indx] = pt[4*indx+4];
|
|
pt[2*indx+1] = pt[4*indx+5];
|
|
indx = 2*indx+2;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static Int
|
|
p_nb_heap_add_to_heap(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"add_to_heap"), *oldH, *oldHB, *pt;
|
|
UInt hsize, hmsize, old_sz;
|
|
Term arena, to, key;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
restart:
|
|
hsize = IntegerOfTerm(qd[HEAP_SIZE]);
|
|
hmsize = IntegerOfTerm(qd[HEAP_MAX]);
|
|
if (hsize == hmsize) {
|
|
CELL *top = qd+(HEAP_START+2*hmsize);
|
|
UInt extra_size;
|
|
|
|
if (hmsize >= 64*1024) {
|
|
extra_size = 64*1024;
|
|
} else {
|
|
extra_size = hmsize;
|
|
}
|
|
if ((extra_size=Yap_InsertInGlobal(top, extra_size*2*sizeof(CELL)))==0) {
|
|
Yap_Error(OUT_OF_STACK_ERROR,TermNil,"No Stack Space for Non-Backtrackable terms");
|
|
return FALSE;
|
|
}
|
|
extra_size = extra_size/(2*sizeof(CELL));
|
|
qd = GetHeap(ARG1,"add_to_heap");
|
|
hmsize += extra_size;
|
|
if (!qd)
|
|
return FALSE;
|
|
qd[-1] = (CELL)Yap_MkFunctor(Yap_LookupAtom("heap"),2*hmsize+HEAP_START)+1;
|
|
top = qd+(HEAP_START+2*(hmsize-extra_size));
|
|
while (extra_size) {
|
|
RESET_VARIABLE(top);
|
|
RESET_VARIABLE(top+1);
|
|
top+=2;
|
|
extra_size--;
|
|
}
|
|
arena = qd[HEAP_ARENA];
|
|
old_sz = ArenaSz(arena);
|
|
oldH = H;
|
|
oldHB = HB;
|
|
H = HB = ArenaPt(arena);
|
|
qd[HEAP_MAX] = Global_MkIntegerTerm(hmsize);
|
|
CloseArena(oldH, oldHB, ASP, qd+HEAP_ARENA, old_sz);
|
|
goto restart;
|
|
}
|
|
arena = qd[HEAP_ARENA];
|
|
if (arena == 0L)
|
|
return FALSE;
|
|
key = CopyTermToArena(ARG2, arena, 3, qd+HEAP_ARENA, qd+HEAP_DELAY_ARENA, 0);
|
|
arena = qd[HEAP_ARENA];
|
|
to = CopyTermToArena(ARG3, arena, 3, qd+HEAP_ARENA, qd+HEAP_DELAY_ARENA, 0);
|
|
if (key == 0 || to == 0L)
|
|
return FALSE;
|
|
qd = GetHeap(ARG1,"add_to_heap");
|
|
arena = qd[HEAP_ARENA];
|
|
/* garbage collection ? */
|
|
oldH = H;
|
|
oldHB = HB;
|
|
H = HB = ArenaPt(arena);
|
|
old_sz = ArenaSz(arena);
|
|
while (old_sz < 128) {
|
|
UInt gsiz = hsize*2;
|
|
|
|
H = oldH;
|
|
HB = oldHB;
|
|
if (gsiz > 1024*1024) {
|
|
gsiz = 1024*1024;
|
|
} else if (gsiz < 1024) {
|
|
gsiz = 1024;
|
|
}
|
|
ARG3 = to;
|
|
if (!GrowArena(arena, ArenaLimit(arena), old_sz, gsiz, 3)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, arena, Yap_ErrorMessage);
|
|
return 0L;
|
|
}
|
|
to = ARG3;
|
|
qd = RepAppl(Deref(ARG1))+1;
|
|
arena = qd[HEAP_ARENA];
|
|
oldH = H;
|
|
oldHB = HB;
|
|
H = HB = ArenaPt(arena);
|
|
old_sz = ArenaSz(arena);
|
|
}
|
|
pt = qd+HEAP_START;
|
|
pt[2*hsize] = key;
|
|
pt[2*hsize+1] = to;
|
|
PushHeap(pt, hsize);
|
|
qd[HEAP_SIZE] = Global_MkIntegerTerm(hsize+1);
|
|
CloseArena(oldH, oldHB, ASP, qd+HEAP_ARENA, old_sz);
|
|
return TRUE;
|
|
}
|
|
|
|
static Int
|
|
p_nb_heap_del(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"deheap");
|
|
UInt old_sz, qsz;
|
|
Term arena;
|
|
CELL *oldH, *oldHB;
|
|
Term tk, tv;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
qsz = IntegerOfTerm(qd[HEAP_SIZE]);
|
|
if (qsz == 0)
|
|
return FALSE;
|
|
arena = qd[HEAP_ARENA];
|
|
if (arena == 0L)
|
|
return FALSE;
|
|
old_sz = ArenaSz(arena);
|
|
/* garbage collection ? */
|
|
oldH = H;
|
|
oldHB = HB;
|
|
qd[HEAP_SIZE] = Global_MkIntegerTerm(qsz-1);
|
|
CloseArena(oldH, oldHB, ASP, &arena, old_sz);
|
|
tk = qd[HEAP_START];
|
|
tv = qd[HEAP_START+1];
|
|
DelHeapRoot(qd+HEAP_START, qsz);
|
|
return Yap_unify(tk, ARG2) &&
|
|
Yap_unify(tv, ARG3);
|
|
}
|
|
|
|
static Int
|
|
p_nb_heap_peek(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"heap_peek");
|
|
UInt qsz;
|
|
Term tk, tv;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
qsz = IntegerOfTerm(qd[HEAP_SIZE]);
|
|
if (qsz == 0)
|
|
return FALSE;
|
|
tk = qd[HEAP_START];
|
|
tv = qd[HEAP_START+1];
|
|
return Yap_unify(tk, ARG2) &&
|
|
Yap_unify(tv, ARG3);
|
|
}
|
|
|
|
static Int
|
|
p_nb_heap_empty(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"heap_empty");
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
return (IntegerOfTerm(qd[HEAP_SIZE]) == 0);
|
|
}
|
|
|
|
static Int
|
|
p_nb_heap_size(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"heap_size");
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
return Yap_unify(ARG2,qd[HEAP_SIZE]);
|
|
}
|
|
|
|
static Int
|
|
p_nb_beam(void)
|
|
{
|
|
Term beam_arena, beam, *ar, *nar;
|
|
#if COROUTINING
|
|
Term delay_beam_arena;
|
|
#endif
|
|
UInt hsize;
|
|
Term tsize = Deref(ARG1);
|
|
UInt arena_sz = (H-H0)/16;
|
|
|
|
if (IsVarTerm(tsize)) {
|
|
Yap_Error(INSTANTIATION_ERROR,tsize,"nb_beam");
|
|
return FALSE;
|
|
} else {
|
|
if (!IsIntegerTerm(tsize)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER,tsize,"nb_beam");
|
|
return FALSE;
|
|
}
|
|
hsize = IntegerOfTerm(tsize);
|
|
}
|
|
while ((beam = MkZeroApplTerm(Yap_MkFunctor(Yap_LookupAtom("heap"),5*hsize+HEAP_START+1),5*hsize+HEAP_START+1)) == TermNil) {
|
|
if (!Yap_gcl((5*hsize+HEAP_START+1)*sizeof(CELL), 2, ENV, P)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
|
|
return FALSE;
|
|
}
|
|
}
|
|
if (!Yap_unify(beam,ARG2))
|
|
return FALSE;
|
|
ar = RepAppl(beam)+1;
|
|
ar[HEAP_ARENA] =
|
|
ar[HEAP_DELAY_ARENA] =
|
|
ar[HEAP_SIZE] =
|
|
MkIntTerm(0);
|
|
ar[HEAP_MAX] = tsize;
|
|
if (arena_sz < 1024)
|
|
arena_sz = 1024;
|
|
beam_arena = NewArena(arena_sz,1,NULL);
|
|
if (beam_arena == 0L) {
|
|
return FALSE;
|
|
}
|
|
nar = RepAppl(Deref(ARG2))+1;
|
|
nar[HEAP_ARENA] = beam_arena;
|
|
#if COROUTINING
|
|
arena_sz = ((attvar_record *)H0- DelayTop())/16;
|
|
if (arena_sz <2)
|
|
arena_sz = 2;
|
|
if (arena_sz > 256)
|
|
arena_sz = 256;
|
|
delay_beam_arena = NewDelayArena(arena_sz);
|
|
if (delay_beam_arena == 0L) {
|
|
return FALSE;
|
|
}
|
|
nar = RepAppl(Deref(ARG2))+1;
|
|
nar[HEAP_DELAY_ARENA] = delay_beam_arena;
|
|
#endif
|
|
return TRUE;
|
|
}
|
|
|
|
static Int
|
|
p_nb_beam_close(void)
|
|
{
|
|
return p_nb_beam_close();
|
|
}
|
|
|
|
|
|
/* we have two queues, one with
|
|
Key, IndxQueue2
|
|
the other with
|
|
Key, IndxQueue1, Val
|
|
*/
|
|
static void
|
|
PushBeam(CELL *pt, CELL *npt, UInt hsize, Term key, Term to)
|
|
{
|
|
UInt off = hsize, off2 = hsize;
|
|
Term toff, toff2;
|
|
|
|
/* push into first queue */
|
|
while (off) {
|
|
UInt noff = (off+1)/2-1;
|
|
if (Yap_compare_terms(key, pt[2*noff]) < 0) {
|
|
UInt i2 = IntegerOfTerm(pt[2*noff+1]);
|
|
|
|
pt[2*off] = pt[2*noff];
|
|
pt[2*off+1] = pt[2*noff+1];
|
|
npt[3*i2+1] = Global_MkIntegerTerm(off);
|
|
off = noff;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
toff = Global_MkIntegerTerm(off);
|
|
/* off says where we are in first queue */
|
|
/* push into second queue */
|
|
while (off2) {
|
|
UInt noff = (off2+1)/2-1;
|
|
if (Yap_compare_terms(key, npt[3*noff]) > 0) {
|
|
UInt i1 = IntegerOfTerm(npt[3*noff+1]);
|
|
|
|
npt[3*off2] = npt[3*noff];
|
|
npt[3*off2+1] = npt[3*noff+1];
|
|
npt[3*off2+2] = npt[3*noff+2];
|
|
pt[2*i1+1] = Global_MkIntegerTerm(off2);
|
|
off2 = noff;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
toff2 = Global_MkIntegerTerm(off2);
|
|
/* store elements in their rightful place */
|
|
npt[3*off2] = pt[2*off] = key;
|
|
pt[2*off+1] = toff2;
|
|
npt[3*off2+1] = toff;
|
|
npt[3*off2+2] = to;
|
|
}
|
|
|
|
static void
|
|
DelBeamMax(CELL *pt, CELL *pt2, UInt sz)
|
|
{
|
|
UInt off = IntegerOfTerm(pt2[1]);
|
|
UInt indx = 0;
|
|
Term tk, ti, tv;
|
|
|
|
sz--;
|
|
/* first, fix the reverse queue */
|
|
tk = pt2[3*sz];
|
|
ti = pt2[3*sz+1];
|
|
tv = pt2[3*sz+2];
|
|
while (TRUE) {
|
|
if (sz < 2*indx+3 || Yap_compare_terms(pt2[6*indx+3],pt2[6*indx+6]) > 0) {
|
|
if (sz < 2*indx+2 || Yap_compare_terms(tk, pt2[6*indx+3]) > 0) {
|
|
break;
|
|
} else {
|
|
UInt off = IntegerOfTerm(pt2[6*indx+4]);
|
|
|
|
pt2[3*indx] = pt2[6*indx+3];
|
|
pt2[3*indx+1] = pt2[6*indx+4];
|
|
pt2[3*indx+2] = pt2[6*indx+5];
|
|
pt[2*off+1] = Global_MkIntegerTerm(indx);
|
|
indx = 2*indx+1;
|
|
}
|
|
} else {
|
|
if (Yap_compare_terms(tk, pt2[6*indx+6]) > 0) {
|
|
break;
|
|
} else {
|
|
UInt off = IntegerOfTerm(pt2[6*indx+7]);
|
|
|
|
pt2[3*indx] = pt2[6*indx+6];
|
|
pt2[3*indx+1] = pt2[6*indx+7];
|
|
pt2[3*indx+2] = pt2[6*indx+8];
|
|
pt[2*off+1] = Global_MkIntegerTerm(indx);
|
|
indx = 2*indx+2;
|
|
}
|
|
}
|
|
}
|
|
pt[2*IntegerOfTerm(ti)+1] = Global_MkIntegerTerm(indx);
|
|
pt2[3*indx] = tk;
|
|
pt2[3*indx+1] = ti;
|
|
pt2[3*indx+2] = tv;
|
|
/* now, fix the standard queue */
|
|
if (off != sz) {
|
|
Term toff, toff2, key;
|
|
UInt off2;
|
|
|
|
key = pt[2*sz];
|
|
toff2 = pt[2*sz+1];
|
|
off2 = IntegerOfTerm(toff2);
|
|
/* off says where we are in first queue */
|
|
/* push into second queue */
|
|
while (off) {
|
|
UInt noff = (off+1)/2-1;
|
|
if (Yap_compare_terms(key, pt[2*noff]) < 0) {
|
|
UInt i1 = IntegerOfTerm(pt[2*noff+1]);
|
|
|
|
pt[2*off] = pt[2*noff];
|
|
pt[2*off+1] = pt[2*noff+1];
|
|
pt2[3*i1+1] = Global_MkIntegerTerm(off);
|
|
off = noff;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
toff = Global_MkIntegerTerm(off);
|
|
/* store elements in their rightful place */
|
|
pt[2*off] = key;
|
|
pt2[3*off2+1] = toff;
|
|
pt[2*off+1] = toff2;
|
|
}
|
|
}
|
|
|
|
static Term
|
|
DelBeamMin(CELL *pt, CELL *pt2, UInt sz)
|
|
{
|
|
UInt off2 = IntegerOfTerm(pt[1]);
|
|
Term ov = pt2[3*off2+2]; /* return value */
|
|
UInt indx = 0;
|
|
Term tk, tv;
|
|
|
|
sz--;
|
|
/* first, fix the standard queue */
|
|
tk = pt[2*sz];
|
|
tv = pt[2*sz+1];
|
|
while (TRUE) {
|
|
if (sz < 2*indx+3 || Yap_compare_terms(pt[4*indx+2],pt[4*indx+4]) < 0) {
|
|
if (sz < 2*indx+2 || Yap_compare_terms(tk, pt[4*indx+2]) < 0) {
|
|
break;
|
|
} else {
|
|
UInt off2 = IntegerOfTerm(pt[4*indx+3]);
|
|
pt[2*indx] = pt[4*indx+2];
|
|
pt[2*indx+1] = pt[4*indx+3];
|
|
pt2[3*off2+1] = Global_MkIntegerTerm(indx);
|
|
indx = 2*indx+1;
|
|
}
|
|
} else {
|
|
if (Yap_compare_terms(tk, pt[4*indx+4]) < 0) {
|
|
break;
|
|
} else {
|
|
UInt off2 = IntegerOfTerm(pt[4*indx+5]);
|
|
|
|
pt[2*indx] = pt[4*indx+4];
|
|
pt[2*indx+1] = pt[4*indx+5];
|
|
pt2[3*off2+1] = Global_MkIntegerTerm(indx);
|
|
indx = 2*indx+2;
|
|
}
|
|
}
|
|
}
|
|
pt[2*indx] = tk;
|
|
pt[2*indx+1] = tv;
|
|
pt2[3*IntegerOfTerm(tv)+1] = Global_MkIntegerTerm(indx);
|
|
/* now, fix the reverse queue */
|
|
if (off2 != sz) {
|
|
Term to, toff, toff2, key;
|
|
UInt off;
|
|
|
|
key = pt2[3*sz];
|
|
toff = pt2[3*sz+1];
|
|
to = pt2[3*sz+2];
|
|
off = IntegerOfTerm(toff);
|
|
/* off says where we are in first queue */
|
|
/* push into second queue */
|
|
while (off2) {
|
|
UInt noff = (off2+1)/2-1;
|
|
if (Yap_compare_terms(key, pt2[3*noff]) > 0) {
|
|
UInt i1 = IntegerOfTerm(pt2[3*noff+1]);
|
|
|
|
pt2[3*off2] = pt2[3*noff];
|
|
pt2[3*off2+1] = pt2[3*noff+1];
|
|
pt2[3*off2+2] = pt2[3*noff+2];
|
|
pt[2*i1+1] = Global_MkIntegerTerm(off2);
|
|
off2 = noff;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
toff2 = Global_MkIntegerTerm(off2);
|
|
/* store elements in their rightful place */
|
|
pt2[3*off2] = key;
|
|
pt[2*off+1] = toff2;
|
|
pt2[3*off2+1] = toff;
|
|
pt2[3*off2+2] = to;
|
|
}
|
|
return ov;
|
|
}
|
|
|
|
static Int
|
|
p_nb_beam_add_to_beam(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"add_to_beam"), *oldH, *oldHB, *pt;
|
|
UInt hsize, hmsize, old_sz;
|
|
Term arena, to, key;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
hsize = IntegerOfTerm(qd[HEAP_SIZE]);
|
|
hmsize = IntegerOfTerm(qd[HEAP_MAX]);
|
|
key = Deref(ARG2);
|
|
if (hsize == hmsize) {
|
|
pt = qd+HEAP_START;
|
|
if (Yap_compare_terms(pt[2*hmsize],Deref(ARG2)) > 0) {
|
|
/* smaller than current max, we need to drop current max */
|
|
DelBeamMax(pt, pt+2*hmsize, hmsize);
|
|
hsize--;
|
|
} else {
|
|
return TRUE;
|
|
}
|
|
}
|
|
arena = qd[HEAP_ARENA];
|
|
if (arena == 0L)
|
|
return FALSE;
|
|
key = CopyTermToArena(ARG2, qd[HEAP_ARENA], 3, qd+HEAP_ARENA, qd+HEAP_DELAY_ARENA, 0);
|
|
arena = qd[HEAP_ARENA];
|
|
to = CopyTermToArena(ARG3, arena, 3, qd+HEAP_ARENA, qd+HEAP_DELAY_ARENA, 0);
|
|
if (key == 0 || to == 0L)
|
|
return FALSE;
|
|
qd = GetHeap(ARG1,"add_to_beam");
|
|
arena = qd[HEAP_ARENA];
|
|
/* garbage collection ? */
|
|
oldH = H;
|
|
oldHB = HB;
|
|
H = HB = ArenaPt(arena);
|
|
old_sz = ArenaSz(arena);
|
|
while (old_sz < 128) {
|
|
UInt gsiz = hsize*2;
|
|
|
|
H = oldH;
|
|
HB = oldHB;
|
|
if (gsiz > 1024*1024) {
|
|
gsiz = 1024*1024;
|
|
} else if (gsiz < 1024) {
|
|
gsiz = 1024;
|
|
}
|
|
ARG3 = to;
|
|
if (!GrowArena(arena, ArenaLimit(arena), old_sz, gsiz, 3)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, arena, Yap_ErrorMessage);
|
|
return 0L;
|
|
}
|
|
to = ARG3;
|
|
qd = RepAppl(Deref(ARG1))+1;
|
|
arena = qd[HEAP_ARENA];
|
|
oldH = H;
|
|
oldHB = HB;
|
|
H = HB = ArenaPt(arena);
|
|
old_sz = ArenaSz(arena);
|
|
}
|
|
pt = qd+HEAP_START;
|
|
PushBeam(pt, pt+2*hmsize, hsize, key, to);
|
|
qd[HEAP_SIZE] = Global_MkIntegerTerm(hsize+1);
|
|
CloseArena(oldH, oldHB, ASP, qd+HEAP_ARENA, old_sz);
|
|
return TRUE;
|
|
}
|
|
|
|
static Int
|
|
p_nb_beam_del(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"debeam");
|
|
UInt old_sz, qsz;
|
|
Term arena;
|
|
CELL *oldH, *oldHB;
|
|
Term tk, tv;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
qsz = IntegerOfTerm(qd[HEAP_SIZE]);
|
|
if (qsz == 0)
|
|
return FALSE;
|
|
arena = qd[HEAP_ARENA];
|
|
if (arena == 0L)
|
|
return FALSE;
|
|
old_sz = ArenaSz(arena);
|
|
/* garbage collection ? */
|
|
oldH = H;
|
|
oldHB = HB;
|
|
qd[HEAP_SIZE] = Global_MkIntegerTerm(qsz-1);
|
|
CloseArena(oldH, oldHB, ASP, &arena, old_sz);
|
|
tk = qd[HEAP_START];
|
|
tv = DelBeamMin(qd+HEAP_START, qd+(HEAP_START+2*IntegerOfTerm(qd[HEAP_MAX])), qsz);
|
|
return Yap_unify(tk, ARG2) &&
|
|
Yap_unify(tv, ARG3);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static Int
|
|
p_nb_beam_check(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"debeam");
|
|
UInt qsz, qmax;
|
|
CELL *pt, *pt2;
|
|
UInt i;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
qsz = IntegerOfTerm(qd[HEAP_SIZE]);
|
|
qmax = IntegerOfTerm(qd[HEAP_MAX]);
|
|
if (qsz == 0)
|
|
return TRUE;
|
|
pt = qd+HEAP_START;
|
|
pt2 = pt+2*qmax;
|
|
for (i = 1; i < qsz; i++) {
|
|
UInt back;
|
|
if (Yap_compare_terms(pt[2*((i+1)/2-1)],pt[2*i]) > 0) {
|
|
Yap_DebugPlWrite(pt[2*((i+1)/2-1)]); fprintf(stderr,"\n");
|
|
Yap_DebugPlWrite(pt[2*i]); fprintf(stderr,"\n");
|
|
fprintf(stderr,"Error at %ld\n",(unsigned long int)i);
|
|
return FALSE;
|
|
}
|
|
back = IntegerOfTerm(pt[2*i+1]);
|
|
if (IntegerOfTerm(pt2[3*back+1]) != i) {
|
|
fprintf(stderr,"Link error at %ld\n",(unsigned long int)i);
|
|
return FALSE;
|
|
}
|
|
}
|
|
for (i = 1; i < qsz; i++) {
|
|
if (Yap_compare_terms(pt2[3*((i+1)/2-1)],pt2[3*i]) < 0) {
|
|
fprintf(stderr,"Error at sec %ld\n",(unsigned long int)i);
|
|
Yap_DebugPlWrite(pt2[3*((i+1)/2-1)]); fprintf(stderr,"\n");
|
|
Yap_DebugPlWrite(pt2[3*i]); fprintf(stderr,"\n");
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
#endif
|
|
|
|
static Int
|
|
p_nb_beam_keys(void)
|
|
{
|
|
CELL *qd;
|
|
UInt qsz;
|
|
CELL *pt, *ho;
|
|
UInt i;
|
|
|
|
restart:
|
|
qd = GetHeap(ARG1,"beam_keys");
|
|
if (!qd)
|
|
return FALSE;
|
|
qsz = IntegerOfTerm(qd[HEAP_SIZE]);
|
|
ho = H;
|
|
pt = qd+HEAP_START;
|
|
if (qsz == 0)
|
|
return Yap_unify(ARG2, TermNil);
|
|
for (i=0; i < qsz; i++) {
|
|
if (H > ASP-1024) {
|
|
H = ho;
|
|
if (!Yap_gcl(((ASP-H)-1024)*sizeof(CELL), 2, ENV, P)) {
|
|
Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
|
|
return TermNil;
|
|
}
|
|
goto restart;
|
|
}
|
|
*H++ = pt[0];
|
|
*H = AbsPair(H+1);
|
|
H++;
|
|
pt += 2;
|
|
}
|
|
H[-1] = TermNil;
|
|
return Yap_unify(ARG2, AbsPair(ho));
|
|
}
|
|
|
|
static Int
|
|
p_nb_beam_peek(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"beam_peek"), *pt, *pt2;
|
|
UInt qsz, qbsize;
|
|
Term tk, tv;
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
qsz = IntegerOfTerm(qd[HEAP_SIZE]);
|
|
qbsize = IntegerOfTerm(qd[HEAP_MAX]);
|
|
if (qsz == 0)
|
|
return FALSE;
|
|
pt = qd+HEAP_START;
|
|
pt2 = pt+2*qbsize;
|
|
tk = pt[0];
|
|
tv = pt2[2];
|
|
return Yap_unify(tk, ARG2) &&
|
|
Yap_unify(tv, ARG3);
|
|
}
|
|
|
|
static Int
|
|
p_nb_beam_empty(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"beam_empty");
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
return (IntegerOfTerm(qd[HEAP_SIZE]) == 0);
|
|
}
|
|
|
|
static Int
|
|
p_nb_beam_size(void)
|
|
{
|
|
CELL *qd = GetHeap(ARG1,"beam_size");
|
|
|
|
if (!qd)
|
|
return FALSE;
|
|
return Yap_unify(ARG2,qd[HEAP_SIZE]);
|
|
}
|
|
|
|
static Int
|
|
cont_current_nb(void)
|
|
{
|
|
Int unif;
|
|
GlobalEntry *ge = (GlobalEntry *)IntegerOfTerm(EXTRA_CBACK_ARG(1,1));
|
|
|
|
unif = Yap_unify(MkAtomTerm(AbsAtom(ge->AtomOfGE)), ARG1);
|
|
ge = ge->NextGE;
|
|
if (!ge) {
|
|
if (unif)
|
|
cut_succeed();
|
|
else
|
|
cut_fail();
|
|
} else {
|
|
EXTRA_CBACK_ARG(1,1) = MkIntegerTerm((Int)ge);
|
|
return unif;
|
|
}
|
|
}
|
|
|
|
static Int
|
|
init_current_nb(void)
|
|
{ /* current_atom(?Atom) */
|
|
Term t1 = Deref(ARG1);
|
|
if (!IsVarTerm(t1)) {
|
|
if (IsAtomTerm(t1))
|
|
cut_succeed();
|
|
else
|
|
cut_fail();
|
|
}
|
|
READ_LOCK(HashChain[0].AERWLock);
|
|
EXTRA_CBACK_ARG(1,1) = MkIntegerTerm((Int)GlobalVariables);
|
|
return cont_current_nb();
|
|
}
|
|
|
|
|
|
void Yap_InitGlobals(void)
|
|
{
|
|
Term cm = CurrentModule;
|
|
Yap_InitCPred("$allocate_arena", 2, p_allocate_arena, 0);
|
|
Yap_InitCPred("$allocate_default_arena", 2, p_allocate_default_arena, 0);
|
|
Yap_InitCPred("arena_size", 1, p_default_arena_size, 0);
|
|
Yap_InitCPred("b_setval", 2, p_b_setval, SafePredFlag);
|
|
Yap_InitCPred("b_getval", 2, p_nb_getval, SafePredFlag);
|
|
Yap_InitCPred("nb_setval", 2, p_nb_setval, 0L);
|
|
Yap_InitCPred("nb_getval", 2, p_nb_getval, SafePredFlag);
|
|
Yap_InitCPred("nb_delete", 1, p_nb_delete, 0L);
|
|
Yap_InitCPredBack("$nb_current", 1, 1, init_current_nb, cont_current_nb, SafePredFlag);
|
|
CurrentModule = GLOBALS_MODULE;
|
|
Yap_InitCPred("nb_queue", 1, p_nb_queue, 0L);
|
|
Yap_InitCPred("nb_queue_close", 3, p_nb_queue_close, SafePredFlag);
|
|
Yap_InitCPred("nb_queue_enqueue", 2, p_nb_queue_enqueue, 0L);
|
|
Yap_InitCPred("nb_queue_dequeue", 2, p_nb_queue_dequeue, SafePredFlag);
|
|
Yap_InitCPred("nb_queue_peek", 2, p_nb_queue_peek, SafePredFlag);
|
|
Yap_InitCPred("nb_queue_empty", 1, p_nb_queue_empty, SafePredFlag);
|
|
Yap_InitCPred("nb_queue_size", 2, p_nb_queue_size, SafePredFlag);
|
|
Yap_InitCPred("nb_heap", 2, p_nb_heap, 0L);
|
|
Yap_InitCPred("nb_heap_close", 1, p_nb_heap_close, SafePredFlag);
|
|
Yap_InitCPred("nb_heap_add", 3, p_nb_heap_add_to_heap, 0L);
|
|
Yap_InitCPred("nb_heap_del", 3, p_nb_heap_del, SafePredFlag);
|
|
Yap_InitCPred("nb_heap_peek", 3, p_nb_heap_peek, SafePredFlag);
|
|
Yap_InitCPred("nb_heap_empty", 1, p_nb_heap_empty, SafePredFlag);
|
|
Yap_InitCPred("nb_heap_size", 2, p_nb_heap_size, SafePredFlag);
|
|
Yap_InitCPred("nb_beam", 2, p_nb_beam, 0L);
|
|
Yap_InitCPred("nb_beam_close", 1, p_nb_beam_close, SafePredFlag);
|
|
Yap_InitCPred("nb_beam_add", 3, p_nb_beam_add_to_beam, 0L);
|
|
Yap_InitCPred("nb_beam_del", 3, p_nb_beam_del, SafePredFlag);
|
|
Yap_InitCPred("nb_beam_peek", 3, p_nb_beam_peek, SafePredFlag);
|
|
Yap_InitCPred("nb_beam_empty", 1, p_nb_beam_empty, SafePredFlag);
|
|
Yap_InitCPred("nb_beam_keys", 2, p_nb_beam_keys, 0L);
|
|
#ifdef DEBUG
|
|
Yap_InitCPred("nb_beam_check", 1, p_nb_beam_check, SafePredFlag);
|
|
#endif
|
|
Yap_InitCPred("nb_beam_size", 2, p_nb_beam_size, SafePredFlag);
|
|
CurrentModule = cm;
|
|
}
|