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yap-6.3/C/alloc.c
Vítor Santos Costa II c4b12d5cbe - fix memory leaks
- avoid unnecessary mallocs by having a first alloc to do th ework.
2010-04-15 22:23:54 +01:00

1643 lines
38 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: alloc.c *
* Last rev: *
* mods: *
* comments: allocating space *
* version:$Id: alloc.c,v 1.95 2008-05-10 23:24:11 vsc Exp $ *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "%W% %G%";
#endif
#include "Yap.h"
#include "Yatom.h"
#include "YapHeap.h"
#include "alloc.h"
#include "yapio.h"
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_MALLOC_H
#include <malloc.h>
#endif
#if USE_DL_MALLOC
#include "dlmalloc.h"
#endif
#if HAVE_MEMORY_H
#include <memory.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#if __simplescalar__
#ifdef USE_MMAP
#undef USE_MMAP
#endif
#ifdef USE_SBRK
#undef USE_SBRK
#endif
#endif
/************************************************************************/
/* Yap workspace management */
#if USE_SYSTEM_MALLOC
#define my_malloc(sz) malloc(sz)
#define my_realloc(ptr, sz, osz, safe) realloc(ptr, sz)
#define my_realloc0(ptr, sz) realloc(ptr, sz)
#define my_free(ptr) free(ptr)
#else
#define my_malloc(sz) Yap_dlmalloc(sz)
#define my_realloc0(ptr, sz) Yap_dlrealloc(ptr, sz)
#define my_free(sz) Yap_dlfree(sz)
static char * my_realloc(char *ptr, UInt sz, UInt osz, int safe)
{
char *nptr;
restart:
/* simple case */
if (ptr < Yap_HeapBase || ptr > HeapTop) {
/* we have enough room */
nptr = Yap_dlmalloc(sz);
if (nptr) {
memmove(nptr, ptr, osz);
free(ptr);
}
} else {
nptr = Yap_dlrealloc(ptr, sz);
}
if (nptr) {
return nptr;
}
/* we do not have enough room */
if (safe) {
if (Yap_growheap(FALSE, sz, NULL)) {
/* now, we have room */
goto restart;
}
}
/* no room in Heap, gosh */
if (ptr < Yap_HeapBase || ptr > HeapTop) {
/* try expanding outside the heap */
nptr = realloc(ptr, sz);
if (nptr) {
memmove(nptr, ptr, osz);
}
} else {
/* try calling the outside world for help */
nptr = malloc(sz);
if (!nptr)
return NULL;
memmove(nptr, ptr, osz);
Yap_dlfree(ptr);
}
/* did we suceed? at this point we could not care less */
return nptr;
}
#endif
#if USE_SYSTEM_MALLOC||USE_DL_MALLOC
long long unsigned int mallocs, reallocs, frees;
long long unsigned int tmalloc;
#undef INSTRUMENT_MALLOC
static inline char *
call_malloc(unsigned long int size)
{
char *out;
#if USE_DL_MALLOC
LOCK(DLMallocLock);
#endif
#if INSTRUMENT_MALLOC
mallocs++;
tmalloc += size;
size += sizeof(CELL);
#endif
Yap_PrologMode |= MallocMode;
out = (char *) my_malloc(size);
#if INSTRUMENT_MALLOC
*(CELL*)out = size-sizeof(CELL);
out += sizeof(CELL);
#endif
Yap_PrologMode &= ~MallocMode;
#if USE_DL_MALLOC
UNLOCK(DLMallocLock);
#endif
return out;
}
char *
Yap_AllocCodeSpace(unsigned long int size)
{
return call_malloc(size);
}
static inline char *
call_realloc(char *p, unsigned long int size)
{
char *out;
#if USE_DL_MALLOC
LOCK(DLMallocLock);
#endif
#if INSTRUMENT_MALLOC
reallocs++;
tmalloc += size;
size += sizeof(CELL);
p -= sizeof(CELL);
tmalloc -= *(CELL*)p;
#endif
Yap_PrologMode |= MallocMode;
out = (char *) my_realloc0(p, size);
#if INSTRUMENT_MALLOC
*(CELL*)out = size-sizeof(CELL);
out += sizeof(CELL);
#endif
Yap_PrologMode &= ~MallocMode;
#if USE_DL_MALLOC
UNLOCK(DLMallocLock);
#endif
return out;
}
char *
Yap_ReallocCodeSpace(char *p, unsigned long int size)
{
return call_realloc(p, size);
}
void
Yap_FreeCodeSpace(char *p)
{
#if USE_DL_MALLOC
LOCK(DLMallocLock);
#endif
Yap_PrologMode |= MallocMode;
#if INSTRUMENT_MALLOC
p -= sizeof(CELL);
tmalloc -= *(CELL*)p;
frees++;
#endif
my_free (p);
Yap_PrologMode &= ~MallocMode;
#if USE_DL_MALLOC
UNLOCK(DLMallocLock);
#endif
}
char *
Yap_AllocAtomSpace(unsigned long int size)
{
return call_malloc(size);
}
void
Yap_FreeAtomSpace(char *p)
{
#if USE_DL_MALLOC
LOCK(DLMallocLock);
#endif
Yap_PrologMode |= MallocMode;
#if INSTRUMENT_MALLOC
p -= sizeof(CELL);
tmalloc -= *(CELL*)p;
frees++;
#endif
my_free (p);
Yap_PrologMode &= ~MallocMode;
#if USE_DL_MALLOC
UNLOCK(DLMallocLock);
#endif
}
#endif
/* If you need to dinamically allocate space from the heap, this is
* the macro you should use */
ADDR
Yap_InitPreAllocCodeSpace(void)
{
char *ptr;
UInt sz = ScratchPad.msz;
if (ScratchPad.ptr == NULL) {
#if USE_DL_MALLOC
LOCK(DLMallocLock);
#endif
Yap_PrologMode |= MallocMode;
#if INSTRUMENT_MALLOC
mallocs++;
tmalloc += sz;
sz += sizeof(CELL);
#endif
while (!(ptr = my_malloc(sz))) {
Yap_PrologMode &= ~MallocMode;
#if USE_DL_MALLOC
UNLOCK(DLMallocLock);
#endif
if (!Yap_growheap(FALSE, Yap_Error_Size, NULL)) {
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage);
return(NULL);
}
#if INSTRUMENT_MALLOC
sz -= sizeof(CELL);
*(CELL*)ptr = sz;
ptr += sizeof(CELL);
#endif
#if USE_DL_MALLOC
LOCK(DLMallocLock);
#endif
Yap_PrologMode |= MallocMode;
}
Yap_PrologMode &= ~MallocMode;
#if USE_DL_MALLOC
UNLOCK(DLMallocLock);
#endif
ScratchPad.ptr = ptr;
} else {
ptr = ScratchPad.ptr;
}
AuxBase = (ADDR)(ptr);
AuxSp = (CELL *)(AuxTop = AuxBase+ScratchPad.sz);
return ptr;
}
ADDR
Yap_ExpandPreAllocCodeSpace(UInt sz0, void *cip, int safe)
{
char *ptr;
UInt sz = ScratchPad.msz;
if (sz0 < SCRATCH_INC_SIZE)
sz0 = SCRATCH_INC_SIZE;
if (sz0 < ScratchPad.sz)
sz = ScratchPad.sz+sz0;
else
sz = sz0;
sz = AdjustLargePageSize(sz+sz/4);
#if USE_DL_MALLOC
LOCK(DLMallocLock);
#endif
Yap_PrologMode |= MallocMode;
#if INSTRUMENT_MALLOC
reallocs++;
tmalloc -= ScratchPad.sz;
tmalloc += sz;
#endif
if (!(ptr = my_realloc(ScratchPad.ptr, sz, ScratchPad.sz, safe))) {
Yap_PrologMode &= ~MallocMode;
#if USE_DL_MALLOC
UNLOCK(DLMallocLock);
#endif
return NULL;
}
Yap_PrologMode &= ~MallocMode;
#if USE_DL_MALLOC
UNLOCK(DLMallocLock);
#endif
ScratchPad.sz = ScratchPad.msz = sz;
ScratchPad.ptr = ptr;
AuxBase = ptr;
AuxSp = (CELL *)(AuxTop = ptr+sz);
return ptr;
}
#if USE_SYSTEM_MALLOC
struct various_codes *Yap_heap_regs;
static void
InitHeap(void)
{
Yap_heap_regs = (struct various_codes *)calloc(1, sizeof(struct various_codes));
#if defined(YAPOR) || defined(TABLING)
LOCAL = REMOTE; /* point to the first area */
#endif /* YAPOR || TABLING */
}
void
Yap_InitHeap(void *heap_addr)
{
InitHeap();
Yap_HoleSize = 0;
HeapMax = 0;
}
static void
InitExStacks(int Trail, int Stack)
{
UInt pm, sa;
/* sanity checking for data areas */
if (Trail < MinTrailSpace)
Trail = MinTrailSpace;
if (Stack < MinStackSpace)
Stack = MinStackSpace;
pm = (Trail + Stack)*K; /* memory to be
* requested */
sa = Stack*K; /* stack area size */
#ifdef THREADS
if (worker_id)
Yap_GlobalBase = (ADDR)MY_ThreadHandle.stack_address;
#endif
Yap_TrailTop = Yap_GlobalBase + pm;
Yap_LocalBase = Yap_GlobalBase + sa;
Yap_TrailBase = Yap_LocalBase + sizeof(CELL);
ScratchPad.ptr = NULL;
ScratchPad.sz = ScratchPad.msz = SCRATCH_START_SIZE;
AuxSp = NULL;
#ifdef DEBUG
if (Yap_output_msg) {
UInt ta;
fprintf(stderr, "HeapBase = %p GlobalBase = %p\n LocalBase = %p TrailTop = %p\n",
Yap_HeapBase, Yap_GlobalBase, Yap_LocalBase, Yap_TrailTop);
ta = Trail*K; /* trail area size */
fprintf(stderr, "Heap+Aux: %lu\tLocal+Global: %lu\tTrail: %lu\n",
(long unsigned)(pm - sa - ta), (long unsigned)sa, (long unsigned)ta);
}
#endif /* DEBUG */
}
void
Yap_InitExStacks(int Trail, int Stack)
{
InitExStacks(Trail, Stack);
}
#if defined(THREADS)
void
Yap_KillStacks(int wid)
{
ADDR gb = FOREIGN_ThreadHandle(wid).stack_address;
if (gb) {
free(gb);
FOREIGN_ThreadHandle(wid).stack_address = NULL;
}
}
#else
void
Yap_KillStacks(void)
{
if (Yap_GlobalBase) {
free(Yap_GlobalBase);
Yap_GlobalBase = NULL;
}
}
#endif
void
Yap_InitMemory(UInt Trail, UInt Heap, UInt Stack)
{
InitHeap();
}
int
Yap_ExtendWorkSpace(Int s)
{
void *basebp = (void *)Yap_GlobalBase, *nbp;
UInt s0 = (char *)Yap_TrailTop-(char *)Yap_GlobalBase;
nbp = realloc(basebp, s+s0);
if (nbp == NULL)
return FALSE;
#if defined(THREADS)
MY_ThreadHandle.stack_address = (char *)nbp;
#endif
Yap_GlobalBase = (char *)nbp;
return TRUE;
}
UInt
Yap_ExtendWorkSpaceThroughHole(UInt s)
{
return -1;
}
void
Yap_AllocHole(UInt actual_request, UInt total_size)
{
}
#if HAVE_MALLINFO
UInt
Yap_givemallinfo(void)
{
struct mallinfo mi = mallinfo();
return mi.uordblks;
}
#endif
#else
#if HAVE_SNPRINTF
#define snprintf3(A,B,C) snprintf(A,B,C)
#define snprintf4(A,B,C,D) snprintf(A,B,C,D)
#define snprintf5(A,B,C,D,E) snprintf(A,B,C,D,E)
#else
#define snprintf3(A,B,C) sprintf(A,C)
#define snprintf4(A,B,C,D) sprintf(A,C,D)
#define snprintf5(A,B,C,D,E) sprintf(A,C,D,E)
#endif
#ifdef LIGHT
#include <stdlib.h>
#endif
#if !USE_DL_MALLOC
STATIC_PROTO(void FreeBlock, (BlockHeader *));
STATIC_PROTO(BlockHeader *GetBlock, (unsigned long int));
STATIC_PROTO(char *AllocHeap, (unsigned long int));
STATIC_PROTO(void RemoveFromFreeList, (BlockHeader *));
STATIC_PROTO(void AddToFreeList, (BlockHeader *));
#define MinHGap 256*K
static void
RemoveFromFreeList(BlockHeader *b)
{
BlockHeader *p;
p = b->b_next_size;
LOCK(HeapUsedLock);
HeapUsed += (b->b_size + 1) * sizeof(YAP_SEG_SIZE);
UNLOCK(HeapUsedLock);
if (p && b->b_size == p->b_size) {
b = b->b_next;
p->b_next = b;
if (b)
b->b_next_size = p;
}
else {
BlockHeader **q = &FreeBlocks;
while ((*q) != b)
q = &((*q)->b_next_size);
if (b->b_next) {
p = b->b_next;
*q = p;
p->b_next_size = b->b_next_size;
}
else {
*q = b->b_next_size;
}
}
}
static void
AddToFreeList(BlockHeader *b)
{
BlockHeader **q, *p;
YAP_SEG_SIZE *sp;
/* insert on list of free blocks */
q = &FreeBlocks;
sp = &(b->b_size) + b->b_size;
*sp = b->b_size;
LOCK(HeapUsedLock);
HeapUsed -= (b->b_size + 1) * sizeof(YAP_SEG_SIZE);
UNLOCK(HeapUsedLock);
while ((p = *q) && p->b_size < b->b_size)
q = &p->b_next_size;
if (p && p->b_size == b->b_size) {
b->b_next = p;
b->b_next_size = p->b_next_size;
p->b_next_size = b;
}
else {
b->b_next = NIL;
b->b_next_size = p;
}
*q = b;
}
static void
FreeBlock(BlockHeader *b)
{
BlockHeader *p;
YAP_SEG_SIZE *sp;
/* {
static long long int vsc_free_ops;
vsc_free_ops++;
BlockHeader *q = FreeBlocks;
while (q) q = q->b_next_size;
}*/
/* sanity check */
sp = &(b->b_size) + (b->b_size & ~InUseFlag);
if (!(b->b_size & InUseFlag) || *sp != b->b_size) {
#if !SHORT_INTS
fprintf(stderr, "%% YAP INTERNAL ERROR: sanity check failed in FreeBlock %p %x %x\n",
b, b->b_size, Unsigned(*sp));
#else
fprintf(stderr, "%% YAP INTERNAL ERROR: sanity check failed in FreeBlock %p %lx %lx\n",
b, b->b_size, *sp);
#endif
return;
}
b->b_size &= ~InUseFlag;
LOCK(FreeBlocksLock);
/* check if we can collapse with other blocsks */
/* check previous */
sp = &(b->b_size) - 1;
if (!(*sp & InUseFlag)) { /* previous block is free */
p = (BlockHeader *) (sp - *sp);
RemoveFromFreeList(p);
p->b_size += b->b_size + 1;
b = p;
}
/* check following */
sp = &(b->b_size) + b->b_size + 1;
if (!(*sp & InUseFlag)) { /* following block is free */
p = (BlockHeader *) sp;
RemoveFromFreeList(p);
b->b_size += p->b_size + 1;
}
LOCK(HeapTopLock);
if (sp == (YAP_SEG_SIZE *)HeapTop) {
LOCK(HeapUsedLock);
HeapUsed -= (b->b_size + 1) * sizeof(YAP_SEG_SIZE);
UNLOCK(HeapUsedLock);
HeapTop = (ADDR)b;
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
} else {
/* insert on list of free blocks */
AddToFreeList(b);
}
UNLOCK(HeapTopLock);
UNLOCK(FreeBlocksLock);
}
static BlockHeader *
GetBlock(unsigned long int n)
{ /* get free block with size at least n */
register BlockHeader **p, *b, *r;
if (FreeBlocks == NIL)
return (NIL);
/* check for bugs */
p = &FreeBlocks;
/* end check for bugs */
p = &FreeBlocks;
while (((b = *p) != NIL) && b->b_size < n)
p = &b->b_next_size;
if (b == NIL || b->b_size < n)
return (NIL);
if ((r = b->b_next) == NIL)
*p = b->b_next_size;
else {
r->b_next_size = b->b_next_size;
*p = r;
}
LOCK(HeapUsedLock);
HeapUsed += (b->b_size + 1) * sizeof(YAP_SEG_SIZE);
if (HeapUsed > HeapMax)
HeapMax = HeapUsed;
UNLOCK(HeapUsedLock);
return (b);
}
static char *
AllocHeap(unsigned long int size)
{
BlockHeader *b, *n;
YAP_SEG_SIZE *sp;
UInt align, extra;
/* {
static long long int vsc_alloc_ops;
vsc_alloc_ops++;
BlockHeader *q = FreeBlocks;
while (q) q = q->b_next_size;
}*/
extra = size/16;
#if SIZEOF_INT_P==4
align = 2*sizeof(CELL); /* size in dwords + 2 */
#endif
#if SIZEOF_INT_P==8
align = sizeof(CELL);
#endif
while (align < extra) align *= 2;
size = ALIGN_SIZE(size,align);
if (size < sizeof(BlockHeader))
size = sizeof(BlockHeader);
size += sizeof(YAP_SEG_SIZE);
/* change units to cells */
size = size/sizeof(CELL);
LOCK(FreeBlocksLock);
if ((b = GetBlock(size))) {
if (b->b_size >= size+24+1) {
n = (BlockHeader *) (((YAP_SEG_SIZE *) b) + size + 1);
n->b_size = b->b_size - size - 1;
b->b_size = size;
AddToFreeList(n);
}
sp = &(b->b_size) + b->b_size;
*sp = b->b_size | InUseFlag;
b->b_size |= InUseFlag;
UNLOCK(FreeBlocksLock);
return (Addr(b) + sizeof(YAP_SEG_SIZE));
}
LOCK(HeapTopLock);
UNLOCK(FreeBlocksLock);
b = (BlockHeader *) HeapTop;
HeapTop += size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
LOCK(HeapUsedLock);
HeapUsed += size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
#ifdef YAPOR
if (HeapTop > Addr(Yap_GlobalBase) - MinHeapGap)
Yap_Error(INTERNAL_ERROR, TermNil, "no heap left (AllocHeap)");
#else
if (HeapTop > HeapLim - MinHeapGap) {
HeapTop -= size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
HeapUsed -= size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
if (HeapTop > HeapLim) {
UNLOCK(HeapUsedLock);
UNLOCK(HeapTopLock);
/* we destroyed the stack */
Yap_Error(OUT_OF_HEAP_ERROR, TermNil, "Stack Crashed against Heap...");
return(NULL);
} else {
if (HeapTop + size * sizeof(CELL) + sizeof(YAP_SEG_SIZE) < HeapLim) {
/* small allocations, we can wait */
HeapTop += size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
HeapUsed += size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
UNLOCK(HeapUsedLock);
UNLOCK(HeapTopLock);
Yap_signal(YAP_CDOVF_SIGNAL);
} else {
if (size > SizeOfOverflow)
SizeOfOverflow = size*sizeof(CELL) + sizeof(YAP_SEG_SIZE);
/* big allocations, the caller must handle the problem */
UNLOCK(HeapUsedLock);
UNLOCK(HeapTopLock);
return(NULL);
}
}
}
#endif /* YAPOR */
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
if (HeapUsed > HeapMax)
HeapMax = HeapUsed;
UNLOCK(HeapUsedLock);
b->b_size = size | InUseFlag;
sp = &(b->b_size) + size;
*sp = b->b_size;
UNLOCK(HeapTopLock);
return (Addr(b) + sizeof(YAP_SEG_SIZE));
}
/* If you need to dinamically allocate space from the heap, this is
* the macro you should use */
static void
FreeCodeSpace(char *p)
{
FreeBlock(((BlockHeader *) (p - sizeof(YAP_SEG_SIZE))));
}
static char *
AllocCodeSpace(unsigned long int size)
{
if (size < SmallSize + 2 * OpCodeSize + 3 * CellSize)
return (AllocHeap(SmallSize + 2 * OpCodeSize + 3 * CellSize));
return (AllocHeap(size));
}
#if DEBUG_ALLOC
int vsc_mem_trace;
#endif
/* If you need to dinamically allocate space from the heap, this is
* the macro you should use */
void
Yap_FreeCodeSpace(char *p)
{
#if DEBUG_ALLOC
if (vsc_mem_trace)
printf("-%p\n",p);
#endif
FreeCodeSpace(p);
}
char *
Yap_AllocAtomSpace(unsigned long int size)
{
char *out = AllocHeap(size);
#if DEBUG_ALLOC
if (vsc_mem_trace) printf("+%p/%d\n",out,size);
#endif
return out;
}
void
Yap_FreeAtomSpace(char *p)
{
#if DEBUG_ALLOC
if (vsc_mem_trace)
printf("-%p\n",p);
#endif
FreeCodeSpace(p);
}
char *
Yap_AllocCodeSpace(unsigned long int size)
{
char *out = AllocCodeSpace(size);
#if DEBUG_ALLOC
if (vsc_mem_trace) printf("+%p/%d\n",out,size);
#endif
return out;
}
#endif
/************************************************************************/
/* Workspace allocation */
/* */
/* We provide four alternatives for workspace allocation. */
/* - use 'mmap' */
/* - use 'shmat' */
/* - use 'sbrk' and provide a replacement to the 'malloc' library */
/* - use 'malloc' */
/* */
/* In any of the alternatives the interface is through the following */
/* functions: */
/* void *InitWorkSpace(int s) - initial workspace allocation */
/* int ExtendWorkSpace(int s) - extend workspace */
/* int Yap_FreeWorkSpace() - release workspace */
/************************************************************************/
#if defined(_WIN32) || defined(__CYGWIN__)
#undef DEBUG_WIN32_ALLOC
#include "windows.h"
static LPVOID brk;
static int
ExtendWorkSpace(Int s, int fixed_allocation)
{
LPVOID b = brk;
prolog_exec_mode OldPrologMode = Yap_PrologMode;
Yap_PrologMode = ExtendStackMode;
#if DEBUG_WIN32_ALLOC
fprintf(stderr,"trying: %p--%x %d\n",b, s, fixed_allocation);
#endif
if (fixed_allocation) {
b = VirtualAlloc(b, s, MEM_RESERVE, PAGE_NOACCESS);
} else {
b = VirtualAlloc(NULL, s, MEM_RESERVE, PAGE_NOACCESS);
if (b && b < brk) {
return ExtendWorkSpace(s, fixed_allocation);
}
}
if (!b) {
Yap_PrologMode = OldPrologMode;
#if DEBUG_WIN32_ALLOC
{
char msg[256];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), msg, 256,
NULL);
fprintf(stderr,"NOT OK1: %p--%p %s\n",b, brk, msg);
}
#endif
return FALSE;
}
b = VirtualAlloc(b, s, MEM_COMMIT, PAGE_READWRITE);
if (!b) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"VirtualAlloc could not commit %ld bytes",
(long int)s);
Yap_PrologMode = OldPrologMode;
#if DEBUG_WIN32_ALLOC
fprintf(stderr,"NOT OK2: %p--%p\n",b,brk);
#endif
return FALSE;
}
brk = (LPVOID) ((Int) b + s);
#if DEBUG_WIN32_ALLOC
fprintf(stderr,"OK: %p--%p\n",b,brk);
#endif
Yap_PrologMode = OldPrologMode;
return TRUE;
}
static MALLOC_T
InitWorkSpace(Int s)
{
SYSTEM_INFO si;
GetSystemInfo(&si);
Yap_page_size = si.dwPageSize;
s = ((s+ (YAP_ALLOC_SIZE-1))/YAP_ALLOC_SIZE)*YAP_ALLOC_SIZE;
brk = (LPVOID)Yap_page_size;
if (!ExtendWorkSpace(s,0))
return FALSE;
return (MALLOC_T)brk-s;
}
int
Yap_FreeWorkSpace(void)
{
return TRUE;
}
#elif USE_MMAP
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef MMAP_ADDR
#define USE_FIXED 1
#endif
#ifndef MAP_FIXED
#define MAP_FIXED 1
#endif
static MALLOC_T WorkSpaceTop;
static MALLOC_T
InitWorkSpace(Int s)
{
MALLOC_T a;
#if !defined(_AIX) && !defined(__APPLE__) && !__hpux
int fd;
#endif
#if defined(_AIX)
a = mmap(0, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_VARIABLE, -1, 0);
#elif __hpux
a = mmap(((void *)MMAP_ADDR), (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
if (a != (MALLOC_T)MMAP_ADDR) {
Yap_Error(FATAL_ERROR, TermNil, "mmap could not map ANON at %p, got %p", (void *)MMAP_ADDR, a);
return(NULL);
}
#elif defined(__APPLE__)
#ifdef MMAP_ADDR
a = mmap(((void *)MMAP_ADDR), (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
if (a != (MALLOC_T)MMAP_ADDR) {
Yap_Error(FATAL_ERROR, TermNil, "mmap could not map ANON at %p, got %p", (void *)MMAP_ADDR,a );
return(NULL);
}
#else
a = mmap(NULL, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON, -1, 0);
fprintf(stderr,"a=%p\n",a);
#endif
#else
fd = open("/dev/zero", O_RDWR, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (fd < 0) {
#if HAVE_MKSTEMP
char file[256];
strncpy(file,"/tmp/YAP.TMPXXXXXX", 256);
if (mkstemp(file) == -1) {
#if HAVE_STRERROR
Yap_Error(FATAL_ERROR, TermNil, "mkstemp could not create temporary file %s (%s)", file, strerror(errno));
#else
Yap_Error(FATAL_ERROR, TermNil, "mkstemp could not create temporary file %s", file);
#endif
return NULL;
}
#else
#if HAVE_TMPNAM
char *file = tmpnam(NULL);
#else
char file[YAP_FILENAME_MAX];
strcpy(file,"/tmp/mapfile");
itos(getpid(), &file[12]);
#endif /* HAVE_TMPNAM */
#endif /* HAVE_MKSTEMP */
fd = open(file, O_CREAT|O_RDWR, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (fd < 0) {
Yap_Error(FATAL_ERROR, TermNil, "mmap could not open %s", file);
return NULL;
}
if (lseek(fd, s, SEEK_SET) < 0) {
Yap_Error(FATAL_ERROR, TermNil, "mmap could not lseek in mmapped file %s", file);
close(fd);
return FALSE;
}
if (write(fd, "", 1) < 0) {
Yap_Error(FATAL_ERROR, TermNil, "mmap could not write in mmapped file %s", file);
close(fd);
return NULL;
}
if (unlink(file) < 0) {
Yap_Error(FATAL_ERROR,TermNil, "mmap could not unlink mmapped file %s", file);
close(fd);
return NULL;
}
}
#if USE_FIXED
a = mmap(((void *)MMAP_ADDR), (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_FIXED, fd, 0);
if (a != (MALLOC_T)MMAP_ADDR) {
Yap_Error(FATAL_ERROR, TermNil, "mmap could not map at %p, got %p", (void *)MMAP_ADDR, a);
return NULL;
}
#else
a = mmap(0, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE, fd, 0);
if ((CELL)a & YAP_PROTECTED_MASK) {
close(fd);
Yap_Error(FATAL_ERROR, TermNil, "mmapped address %p collides with YAP tags", a);
return NULL;
}
if (close(fd) == -1) {
Yap_Error(FATAL_ERROR, TermNil, "while closing mmaped file");
return NULL;
}
#endif
#endif
if
#ifdef MMAP_FAILED
(a == (MALLOC_T) MMAP_FAILED)
#else
(a == (MALLOC_T) - 1)
#endif
{
Yap_Error(FATAL_ERROR, TermNil, "mmap cannot allocate memory ***");
return(NULL);
}
WorkSpaceTop = (char *) a + s;
return (void *) a;
}
static MALLOC_T
mmap_extension(Int s, MALLOC_T base, int fixed_allocation)
{
MALLOC_T a;
#if !defined(_AIX) && !defined(__hpux) && !defined(__APPLE__)
int fd;
#endif
#if defined(_AIX) || defined(__hpux)
a = mmap(base, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
#elif defined(__APPLE__)
a = mmap(base, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON | fixed_allocation, -1, 0);
#else
fd = open("/dev/zero", O_RDWR);
if (fd < 0) {
#if HAVE_MKSTEMP
char file[256];
strncpy(file,"/tmp/YAP.TMPXXXXXX",256);
if (mkstemp(file) == -1) {
Yap_ErrorMessage = Yap_ErrorSay;
#if HAVE_STRERROR
snprintf5(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mkstemp could not create temporary file %s (%s)",
file, strerror(errno));
#else
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mkstemp could not create temporary file %s", file);
#endif /* HAVE_STRERROR */
return (MALLOC_T)-1;
}
#else
#if HAVE_TMPNAM
char *file = tmpnam(NULL);
#else
char file[YAP_FILENAME_MAX];
strcpy(file,"/tmp/mapfile");
itos(getpid(), &file[12]);
#endif /* HAVE_TMPNAM */
#endif /* HAVE_MKSTEMP */
fd = open(file, O_CREAT|O_RDWR, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (fd < 0) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mmap could not open %s", file);
return (MALLOC_T)-1;
}
if (lseek(fd, s, SEEK_SET) < 0) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mmap could not lseek in mmapped file %s", file);
close(fd);
return (MALLOC_T)-1;
}
if (write(fd, "", 1) < 0) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mmap could not write in mmapped file %s", file);
close(fd);
return (MALLOC_T)-1;
}
if (unlink(file) < 0) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mmap could not unlink mmapped file %s", file);
close(fd);
return (MALLOC_T)-1;
}
}
a = mmap(base, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE
#if !defined(__linux)
/* use MAP_FIXED, otherwise God knows where you will be placed */
|fixed_allocation
#endif
, fd, 0);
if (close(fd) == -1) {
Yap_ErrorMessage = Yap_ErrorSay;
#if HAVE_STRERROR
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mmap could not close file (%s) ]\n", strerror(errno));
#else
snprintf3(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mmap could not close file ]\n");
#endif
return (MALLOC_T)-1;
}
#endif
return a;
}
static int
ExtendWorkSpace(Int s, int fixed_allocation)
{
#ifdef YAPOR
Yap_Error(INTERNAL_ERROR, TermNil, "cannot extend stacks (ExtendWorkSpace)");
return(FALSE);
#else
MALLOC_T a;
prolog_exec_mode OldPrologMode = Yap_PrologMode;
MALLOC_T base = WorkSpaceTop;
if (fixed_allocation == MAP_FIXED)
base = WorkSpaceTop;
else
base = 0L;
Yap_PrologMode = ExtendStackMode;
a = mmap_extension(s, base, fixed_allocation);
Yap_PrologMode = OldPrologMode;
if (a == (MALLOC_T) - 1) {
Yap_ErrorMessage = Yap_ErrorSay;
#if HAVE_STRERROR
snprintf5(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"could not allocate %d bytes (%s)", (int)s, strerror(errno));
#else
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"could not allocate %d bytes", (int)s);
#endif
return FALSE;
}
if (fixed_allocation) {
if (a != WorkSpaceTop) {
munmap((void *)a, (size_t)s);
Yap_ErrorMessage = Yap_ErrorSay;
snprintf5(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"mmap could not grow memory at %p, got %p", WorkSpaceTop, a );
Yap_PrologMode = OldPrologMode;
return FALSE;
}
} else if (a < WorkSpaceTop) {
/* try again */
int res = ExtendWorkSpace(s, fixed_allocation);
/* release memory back to system */
munmap(a, s);
return res;
}
WorkSpaceTop = (char *) a + s;
Yap_PrologMode = OldPrologMode;
return TRUE;
#endif /* YAPOR */
}
int
Yap_FreeWorkSpace(void)
{
return 1;
}
#elif USE_SHM
#if HAVE_SYS_SHM_H
#include <sys/shm.h>
#endif
#ifndef MMAP_ADDR
#define MMAP_ADDR 0x0L
#endif
static MALLOC_T WorkSpaceTop;
static MALLOC_T
InitWorkSpace(Int s)
{
MALLOC_T ptr;
int shm_id;
/* mapping heap area */
if((shm_id = shmget(IPC_PRIVATE, (size_t)s, SHM_R|SHM_W)) == -1) {
Yap_Error(FATAL_ERROR, TermNil, "could not shmget %d bytes", s);
return(NULL);
}
if((ptr = (MALLOC_T)shmat(shm_id, (void *) MMAP_ADDR, 0)) == (MALLOC_T) -1) {
Yap_Error(FATAL_ERROR, TermNil, "could not shmat at %p", MMAP_ADDR);
return(NULL);
}
if (shmctl(shm_id, IPC_RMID, 0) != 0) {
Yap_Error(FATAL_ERROR, TermNil, "could not remove shm segment", shm_id);
return(NULL);
}
WorkSpaceTop = (char *) ptr + s;
return(ptr);
}
static int
ExtendWorkSpace(Int s)
{
MALLOC_T ptr;
int shm_id;
prolog_exec_mode OldPrologMode = Yap_PrologMode;
Yap_PrologMode = ExtendStackMode;
/* mapping heap area */
if((shm_id = shmget(IPC_PRIVATE, (size_t)s, SHM_R|SHM_W)) == -1) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"could not shmget %d bytes", s);
Yap_PrologMode = OldPrologMode;
return(FALSE);
}
if((ptr = (MALLOC_T)shmat(shm_id, WorkSpaceTop, 0)) == (MALLOC_T) -1) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"could not shmat at %p", MMAP_ADDR);
Yap_PrologMode = OldPrologMode;
return(FALSE);
}
if (shmctl(shm_id, IPC_RMID, 0) != 0) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"could not remove shm segment", shm_id);
Yap_PrologMode = OldPrologMode;
return(FALSE);
}
WorkSpaceTop = (char *) ptr + s;
Yap_PrologMode = OldPrologMode;
return(TRUE);
}
int
Yap_FreeWorkSpace(void)
{
return TRUE;
}
#elif USE_SBRK
/***********************************************************************\
* Worspace allocation based on 'sbrk' *
* We have to provide a replacement for the 'malloc' functions. *
* The situation is further complicated by the need to provide *
* temporary 'malloc' space when restoring a previously saved state. *
\***********************************************************************/
#ifdef _AIX
char *STD_PROTO(sbrk, (int));
#endif
int in_limbo; /* non-zero when restoring a saved state */
#ifndef LIMBO_SIZE
#define LIMBO_SIZE 32*K
#endif
static char limbo_space[LIMBO_SIZE]; /* temporary malloc space */
static char *limbo_p = limbo_space, *limbo_pp = 0;
static MALLOC_T
InitWorkSpace(Int s)
{
MALLOC_T ptr = (MALLOC_T)sbrk(s);
if (ptr == ((MALLOC_T) - 1)) {
Yap_Error(FATAL_ERROR, TermNil, "could not allocate %d bytes", s);
return(NULL);
}
return(ptr);
}
static int
ExtendWorkSpace(Int s)
{
MALLOC_T ptr = (MALLOC_T)sbrk(s);
prolog_exec_mode OldPrologMode = Yap_PrologMode;
Yap_PrologMode = ExtendStackMode;
if (ptr == ((MALLOC_T) - 1)) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"could not expand stacks over %d bytes", s);
Yap_PrologMode = OldPrologMode;
return(FALSE);
}
Yap_PrologMode = OldPrologMode;
return TRUE;
}
int
Yap_FreeWorkSpace(void)
{
return TRUE;
}
MALLOC_T
malloc(size_t size)
{
if (in_limbo) {
limbo_pp = limbo_p;
limbo_p += (size + 7) & 0xffff8;
if (limbo_p >= &limbo_space[LIMBO_SIZE])
return(NULL);
return (limbo_pp);
}
else {
CODEADDR codep = (CODEADDR)AllocCodeSpace(size + 2*sizeof(void *));
if (codep == NIL)
return(NIL);
else
return(codep + 2*sizeof(void *));
}
}
void
free(MALLOC_T ptr)
{
BlockHeader *b = (BlockHeader *) (((char *) ptr) - 2*sizeof(void *) - sizeof(YAP_SEG_SIZE));
if (ptr == limbo_pp) {
limbo_p = limbo_pp;
return;
}
if (!ptr)
return;
if ((char *) ptr < Yap_HeapBase || (char *) ptr > HeapTop)
return;
if (!(b->b_size & InUseFlag))
return;
FreeCodeSpace((char *) ptr - 2*sizeof(void *));
}
MALLOC_T
XX realloc(MALLOC_T ptr, size_t size)
{
MALLOC_T new = malloc(size);
if (ptr)
memcpy(new, ptr, size);
free(ptr);
return (new);
}
MALLOC_T
calloc(size_t n, size_t e)
{
unsigned k = n * e;
MALLOC_T p = malloc(k);
memset(p, 0, k);
return (p);
}
#ifdef M_MXFAST
int
mallopt(cmd, value)
{
return (value);
}
static struct mallinfo xmall;
struct mallinfo
mallinfo(void)
{
return (xmall);
}
#endif
#else
/* use malloc to initiliase memory */
/* user should ask for a lot of memory first */
#ifdef __linux
#define MAX_SPACE 420*1024*1024
#else
#define MAX_SPACE 128*1024*1024
#endif
static int total_space;
static MALLOC_T
InitWorkSpace(Int s)
{
MALLOC_T ptr;
#ifdef M_MMAP_MAX
mallopt(M_MMAP_MAX, 0);
#endif
ptr = (MALLOC_T)calloc(MAX_SPACE,1);
total_space = s;
if (ptr == NULL) {
Yap_Error(FATAL_ERROR, TermNil, "could not allocate %d bytes", s);
return(NULL);
}
return(ptr);
}
static int
ExtendWorkSpace(Int s)
{
MALLOC_T ptr;
prolog_exec_mode OldPrologMode = Yap_PrologMode;
Yap_PrologMode = ExtendStackMode;
total_space += s;
if (total_space < MAX_SPACE) return TRUE;
ptr = (MALLOC_T)realloc((void *)Yap_HeapBase, total_space);
if (ptr == NULL) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"could not allocate %d bytes", s);
Yap_PrologMode = OldPrologMode;
return FALSE;
}
if (ptr != (MALLOC_T)Yap_HeapBase) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf4(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"could not expand contiguous stacks %d bytes", s);
Yap_PrologMode = OldPrologMode;
return FALSE;
}
if ((CELL)ptr & MBIT) {
Yap_ErrorMessage = Yap_ErrorSay;
snprintf5(Yap_ErrorMessage, MAX_ERROR_MSG_SIZE,
"memory at %p conflicts with MBIT %lx", ptr, (unsigned long)MBIT);
Yap_PrologMode = OldPrologMode;
return FALSE;
}
Yap_PrologMode = OldPrologMode;
return TRUE;
}
int
Yap_FreeWorkSpace(void)
{
return TRUE;
}
#endif
static void
InitHeap(void *heap_addr)
{
/* allocate space */
Yap_HeapBase = heap_addr;
/* reserve space for specially allocated functors and atoms so that
their values can be known statically */
HeapTop = Yap_HeapBase + AdjustSize(sizeof(all_heap_codes));
Yap_HoleSize = 0;
#if USE_DL_MALLOC
Yap_initdlmalloc();
#else
HeapMax = HeapUsed = HeapTop-Yap_HeapBase;
/* notice that this forces odd addresses */
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
HeapTop = HeapTop + sizeof(YAP_SEG_SIZE);
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
#endif
FreeBlocks = NIL;
#if defined(YAPOR) || defined(TABLING)
LOCAL = REMOTE; /* point to the first area */
#endif /* YAPOR || TABLING */
}
void
Yap_InitHeap(void *heap_addr)
{
InitHeap(heap_addr);
}
void
Yap_InitMemory(UInt Trail, UInt Heap, UInt Stack)
{
UInt pm, sa, ta;
void *addr;
pm = (Trail + Heap + Stack); /* memory to be
* requested */
sa = Stack; /* stack area size */
ta = Trail; /* trail area size */
#if RANDOMIZE_START_ADDRESS
srand(time(NULL));
UInt x = (rand()% 100)*YAP_ALLOC_SIZE ;
fprintf(stderr,"x=%lx\n", (unsigned long int)x);
pm += x;
#endif
addr = InitWorkSpace(pm);
#if RANDOMIZE_START_ADDRESS
addr = (char *)addr+x;
pm -= x;
fprintf(stderr,"addr=%p\n", addr);
#endif
InitHeap(addr);
Yap_TrailTop = Yap_HeapBase + pm;
Yap_LocalBase = Yap_TrailTop - ta;
Yap_TrailBase = Yap_LocalBase + sizeof(CELL);
Yap_GlobalBase = Yap_LocalBase - sa;
HeapLim = Yap_GlobalBase; /* avoid confusions while
* * restoring */
#if !USE_DL_MALLOC
AuxTop = (ADDR)(AuxSp = (CELL *)Yap_GlobalBase);
#endif
#ifdef DEBUG
#if SIZEOF_INT_P!=SIZEOF_INT
if (Yap_output_msg) {
fprintf(stderr, "HeapBase = %p GlobalBase = %p\n LocalBase = %p TrailTop = %p\n",
Yap_HeapBase, Yap_GlobalBase, Yap_LocalBase, Yap_TrailTop);
#else
if (Yap_output_msg) {
fprintf(stderr, "HeapBase = %x GlobalBase = %x\n LocalBase = %x TrailTop = %x\n",
(UInt) Yap_HeapBase, (UInt) Yap_GlobalBase,
(UInt) Yap_LocalBase, (UInt) Yap_TrailTop);
#endif
#if !SHORT_INTS
fprintf(stderr, "Heap+Aux: %d\tLocal+Global: %d\tTrail: %d\n",
pm - sa - ta, sa, ta);
#else /* SHORT_INTS */
fprintf(stderr, "Heap+Aux: %ld\tLocal+Global: %ld\tTrail: %ld\n",
pm - sa - ta, sa, ta);
#endif /* SHORT_INTS */
}
#endif /* DEBUG */
}
void
Yap_InitExStacks(int Trail, int Stack)
{
#if USE_DL_MALLOC
ScratchPad.ptr = NULL;
ScratchPad.sz = ScratchPad.msz = SCRATCH_START_SIZE;
AuxSp = NULL;
#endif
}
#if defined(_WIN32) || defined(__CYGWIN__)
#define WorkSpaceTop brk
#define MAP_FIXED 1
#endif
#if !USE_DL_MALLOC
/* dead code */
void Yap_add_memory_hole(ADDR Start, ADDR End)
{
Yap_HoleSize += Start-End;
}
#endif
int
Yap_ExtendWorkSpace(Int s)
{
#if USE_MMAP
return ExtendWorkSpace(s, MAP_FIXED);
#elif defined(_WIN32)
return ExtendWorkSpace(s, MAP_FIXED);
#else
return ExtendWorkSpace(s);
#endif
}
UInt
Yap_ExtendWorkSpaceThroughHole(UInt s)
{
#if USE_MMAP || defined(_WIN32) || defined(__CYGWIN__)
MALLOC_T WorkSpaceTop0 = WorkSpaceTop;
#if SIZEOF_INT_P==4
while (WorkSpaceTop < (MALLOC_T)0xc0000000L) {
/* progress 1 MB */
WorkSpaceTop += 512*1024;
if (ExtendWorkSpace(s, MAP_FIXED)) {
Yap_add_memory_hole((ADDR)WorkSpaceTop0, (ADDR)WorkSpaceTop-s);
Yap_ErrorMessage = NULL;
return WorkSpaceTop-WorkSpaceTop0;
}
#if defined(_WIN32)
/* 487 happens when you step over someone else's memory */
if (GetLastError() != 487) {
WorkSpaceTop = WorkSpaceTop0;
return -1;
}
#endif
}
WorkSpaceTop = WorkSpaceTop0;
#endif
if (ExtendWorkSpace(s, 0)) {
Yap_add_memory_hole((ADDR)WorkSpaceTop0, (ADDR)WorkSpaceTop-s);
Yap_ErrorMessage = NULL;
return WorkSpaceTop-WorkSpaceTop0;
}
#endif
return -1;
}
void
Yap_AllocHole(UInt actual_request, UInt total_size)
{
#if (USE_MMAP || defined(_WIN32) || defined(__CYGWIN__)) && !USE_DL_MALLOC
/* where we were when the hole was created,
also where is the hole store */
ADDR WorkSpaceTop0 = WorkSpaceTop-total_size;
BlockHeader *newb = (BlockHeader *)HeapTop;
BlockHeader *endb = (BlockHeader *)(WorkSpaceTop0-sizeof(YAP_SEG_SIZE));
YAP_SEG_SIZE bsiz = (WorkSpaceTop0-HeapTop)/sizeof(CELL)-2*sizeof(YAP_SEG_SIZE)/sizeof(CELL);
/* push HeapTop to after hole */
HeapTop = WorkSpaceTop-(actual_request-sizeof(YAP_SEG_SIZE));
((YAP_SEG_SIZE *) HeapTop)[0] = InUseFlag;
/* now simulate a block */
((YAP_SEG_SIZE *) HeapTop)[-1] =
endb->b_size =
(HeapTop-WorkSpaceTop0)/sizeof(YAP_SEG_SIZE) | InUseFlag;
newb->b_size = bsiz;
AddToFreeList(newb);
#endif
}
#endif /* USE_SYSTEM_MALLOC */