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yap-6.3/C/alloc.c

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/*************************************************************************
* *
* 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 1.7 2001-05-21 20:00:05 vsc Exp $ *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "%W% %G%";
#endif
#include "Yap.h"
#include "Yatom.h"
#include "Heap.h"
#include "alloc.h"
#include "yapio.h"
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_MEMORY_H
#include <memory.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.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
STATIC_PROTO(void FreeBlock, (BlockHeader *));
STATIC_PROTO(BlockHeader *GetBlock, (unsigned int));
STATIC_PROTO(char *AllocHeap, (unsigned int));
STATIC_PROTO(void RemoveFromFreeList, (BlockHeader *));
STATIC_PROTO(void AddToFreeList, (BlockHeader *));
#ifdef LIGHT
#include <stdlib.h>
#endif
#define K ((Int) 1024)
#define MinHGap 256*K
/************************************************************************/
/* Yap workspace management */
int
SizeOfBlock(CODEADDR p)
{
BlockHeader *b = (BlockHeader *) (p - sizeof(YAP_SEG_SIZE));
YAP_SEG_SIZE s = (b->b_size) & ~InUseFlag;
return ((s - 1) * sizeof(YAP_SEG_SIZE));
}
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 = (BlockHeader **) &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 = (BlockHeader **) &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;
}
long int call_counter;
static void
FreeBlock(BlockHeader *b)
{
BlockHeader *p;
YAP_SEG_SIZE *sp;
/* sanity check */
sp = &(b->b_size) + (b->b_size & ~InUseFlag);
if (*sp != b->b_size) {
#if !SHORT_INTS
YP_fprintf(YP_stderr, "** sanity check failed in FreeBlock %p %x %x\n",
b, b->b_size, Unsigned(*sp));
#else
YP_fprintf(YP_stderr, "** sanity check failed in FreeBlock %p %lx %lx\n",
b, b->b_size, *sp);
#endif
return;
}
b->b_size &= ~InUseFlag;
LOCK(FreeBlocksLock);
LOCK(GLOBAL_LOCKS_alloc_block);
/* 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;
}
/* insert on list of free blocks */
AddToFreeList(b);
UNLOCK(GLOBAL_LOCKS_alloc_block);
UNLOCK(FreeBlocksLock);
}
static BlockHeader *
GetBlock(unsigned int n)
{ /* get free block with size at least n */
register BlockHeader **p, *b, *r;
if (FreeBlocks == NIL)
return (NIL);
p = (BlockHeader **) &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 int size)
{
BlockHeader *b, *n;
YAP_SEG_SIZE *sp;
#if SIZEOF_INT_P==4
size = (((size + 7) & 0xffffff8) >> 2) + 2; /* size in dwords + 2 */
#endif
#if SIZEOF_INT_P==8
size = (((size + 7) & 0xffffff8) >> 3) + 2; /* size in dwords + 2 */
#endif
if (size < 6)
size = 6;
LOCK(FreeBlocksLock);
LOCK(GLOBAL_LOCKS_alloc_block);
if ((b = GetBlock(size))) {
if (b->b_size >= size + 6 + 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(GLOBAL_LOCKS_alloc_block);
UNLOCK(FreeBlocksLock);
return (Addr(b) + sizeof(YAP_SEG_SIZE));
}
UNLOCK(FreeBlocksLock);
if (!HEAPTOP_OWNER(worker_id)) {
LOCK(HeapTopLock);
}
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(GlobalBase) - MinHeapGap) {
abort_optyap("No heap left in function AllocHeap");
}
#else
if (HeapTop > Addr(AuxSp) - MinHeapGap) {
HeapTop -= size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
HeapUsed -= size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
if (HeapTop > Addr(AuxSp)) {
UNLOCK(HeapUsedLock);
if (!HEAPTOP_OWNER(worker_id)) {
UNLOCK(HeapTopLock);
}
/* we destroyed the stack */
Abort("Stack Crashed against Heap...");
return(NULL);
} else {
if (HeapTop + size * sizeof(CELL) + sizeof(YAP_SEG_SIZE) < Addr(AuxSp)) {
/* small allocations, we can wait */
HeapTop += size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
HeapUsed += size * sizeof(CELL) + sizeof(YAP_SEG_SIZE);
UNLOCK(HeapUsedLock);
if (!HEAPTOP_OWNER(worker_id)) {
UNLOCK(HeapTopLock);
}
CreepFlag = Unsigned(LCL0) - Unsigned(H0);
} else {
if (size > SizeOfOverflow)
SizeOfOverflow = size*sizeof(CELL) + sizeof(YAP_SEG_SIZE);
/* big allocations, the caller must handle the problem */
UNLOCK(HeapUsedLock);
if (!HEAPTOP_OWNER(worker_id)) {
UNLOCK(HeapTopLock);
}
return(NULL);
}
}
}
#endif /* YAPOR */
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
if (HeapUsed > HeapMax)
HeapMax = HeapUsed;
HeapPlus = HeapTop + MinHGap / CellSize;
UNLOCK(GLOBAL_LOCKS_alloc_block);
UNLOCK(HeapUsedLock);
b->b_size = size | InUseFlag;
sp = &(b->b_size) + size;
*sp = b->b_size;
if (!HEAPTOP_OWNER(worker_id)) {
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 */
ADDR
PreAllocCodeSpace(void)
{
LOCK(HeapTopLock);
HEAPTOP_OWN(worker_id);
return (Addr(HeapTop) + sizeof(YAP_SEG_SIZE));
}
#if defined(YAPOR) || defined(THREADS)
/* Grabbing the HeapTop is an excellent idea for a sequential system,
but does work as well in parallel systems. Anyway, this will do for now */
void
ReleasePreAllocCodeSpace(ADDR ptr)
{
HEAPTOP_DISOWN(worker_id);
UNLOCK(HeapTopLock);
}
#endif
/* If you need to dinamically allocate space from the heap, this is
* the macro you should use */
void
FreeCodeSpace(char *p)
{
FreeBlock(((BlockHeader *) (p - sizeof(YAP_SEG_SIZE))));
}
char *
AllocAtomSpace(unsigned int size)
{
return (AllocHeap(size));
}
void
FreeAtomSpace(char *p)
{
FreeCodeSpace(p);
}
char *
AllocCodeSpace(unsigned int size)
{
if (size < SmallSize + 2 * OpCodeSize + 3 * CellSize)
return (AllocHeap(SmallSize + 2 * OpCodeSize + 3 * CellSize));
return (AllocHeap(size));
}
/************************************************************************/
/* 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 FreeWorkSpace() - release workspace */
/************************************************************************/
#ifdef _WIN32
#include "windows.h"
#define BASE_ADDRESS ((LPVOID) MMAP_ADDR)
#define MAX_WORKSPACE 0x20000000L
static LPVOID brk;
int
ExtendWorkSpace(Int s)
{
LPVOID b;
s = ((s-1)/page_size+1)*page_size;
b = VirtualAlloc(brk, s, MEM_COMMIT, PAGE_READWRITE);
if (b) {
brk = (LPVOID) ((Int) brk + s);
return TRUE;
}
return FALSE;
}
MALLOC_T
InitWorkSpace(Int s)
{
SYSTEM_INFO si;
LPVOID b;
GetSystemInfo(&si);
page_size = si.dwPageSize;
b = VirtualAlloc(BASE_ADDRESS, MAX_WORKSPACE, MEM_RESERVE, PAGE_NOACCESS);
if (b==NULL) {
YP_fprintf(YP_stderr,"[ Warning: YAP reserving space at a variable address ]\n");
b = VirtualAlloc(0x0, MAX_WORKSPACE, MEM_RESERVE, PAGE_NOACCESS);
if (b == NULL) {
YP_fprintf(YP_stderr,"[ FATAL ERROR: YAP failed to reserve space ]\n");
exit(1);
}
}
brk = BASE_ADDRESS;
if (ExtendWorkSpace(s)) {
return BASE_ADDRESS;
} else {
YP_fprintf(YP_stderr,"[ FATAL ERROR: YAP failed to reserve space ]\n");
exit(1);
}
}
int
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
static MALLOC_T WorkSpaceTop;
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) {
Error(SYSTEM_ERROR, TermNil, "mmap could not map ANON at %p, got %p", (void *)MMAP_ADDR, a);
}
#elif defined(__APPLE__)
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) {
Error(SYSTEM_ERROR, TermNil, "mmap could not map ANON at %p, got %p", (void *)MMAP_ADDR,a );
}
#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) {
#if HAVE_STRERROR
Error(SYSTEM_ERROR, TermNil, "mkstemp could not create temporary file %s (%s)", file, strerror(errno));
#else
Error(SYSTEM_ERROR, TermNil, "mkstemp could not create temporary file %s", file);
#endif
return FALSE;
}
#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);
if (fd < 0) {
Error(SYSTEM_ERROR, TermNil, "mmap could not open %s", file);
return FALSE;
}
if (lseek(fd, s, SEEK_SET) < 0) {
Error(SYSTEM_ERROR, TermNil, "mmap could not lseek in mmapped file %s", file);
return FALSE;
}
if (write(fd, "", 1) < 0) {
Error(SYSTEM_ERROR, TermNil, "mmap could not write in mmapped file %s", file);
return FALSE;
}
if (unlink(file) < 0) {
Error(SYSTEM_ERROR,TermNil, "mmap could not unlink mmapped file %s", file);
return FALSE;
}
}
#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) {
Error(SYSTEM_ERROR, TermNil, "mmap could not map at %p, got %p", (void *)MMAP_ADDR, a);
}
#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);
Error(FATAL_ERROR, TermNil, "mmapped address %p collides with YAP tags ***", a);
}
if (close(fd) == -1) {
Error(SYSTEM_ERROR, TermNil, "while closing mmaped file ***");
return FALSE;
}
#endif
#endif
if
#ifdef MMAP_FAILED
(a == (MALLOC_T) MMAP_FAILED)
#else
(a == (MALLOC_T) - 1)
#endif
{
Error(FATAL_ERROR, TermNil, "mmap cannot allocate memory ***");
return(NULL);
}
WorkSpaceTop = (char *) a + s;
return (void *) a;
}
int
ExtendWorkSpace(Int s)
{
#ifdef YAPOR
abort_optyap("function ExtendWorkSpace called");
return(FALSE);
#else
MALLOC_T a;
#if defined(_AIX) || defined(__hpux)
a = mmap(WorkSpaceTop, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
#elif defined(__APPLE__)
a = mmap(WorkSpaceTop, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);
#else
int fd;
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) {
#if HAVE_STRERROR
Error(SYSTEM_ERROR, TermNil, "mkstemp could not create temporary file %s (%s)", file, strerror(errno));
#else
Error(SYSTEM_ERROR, TermNil, "mkstemp could not create temporary file %s", file);
#endif /* HAVE_STRERROR */
return FALSE;
}
#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);
if (fd < 0) {
Error(SYSTEM_ERROR, TermNil, "mmap could not open %s", file);
return FALSE;
}
if (lseek(fd, s, SEEK_SET) < 0) {
Error(SYSTEM_ERROR, TermNil, "mmap could not lseek in mmapped file %s", file);
return FALSE;
}
if (write(fd, "", 1) < 0) {
Error(SYSTEM_ERROR, TermNil, "mmap could not write in mmapped file %s", file);
return FALSE;
}
if (unlink(file) < 0) {
Error(SYSTEM_ERROR, TermNil, "mmap could not unlink mmapped file %s", file);
return FALSE;
}
}
a = mmap(WorkSpaceTop, (size_t) s, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_FIXED, fd, 0);
if (close(fd) == -1) {
#if HAVE_STRERROR
Error(SYSTEM_ERROR, TermNil, "mmap could not close file (%s) ]\n", strerror(errno));
#else
Error(SYSTEM_ERROR, TermNil, "mmap could not close file ]\n");
#endif
return FALSE;
}
#endif
if (a == (MALLOC_T) - 1) {
#if HAVE_STRERROR
Error(SYSTEM_ERROR, TermNil, "could not allocate %d bytes (%s)", (int)s, strerror(errno));
#else
Error(SYSTEM_ERROR, TermNil, "could not allocate %d bytes", (int)s);
#endif
return FALSE;
}
if (a != WorkSpaceTop) {
Error(SYSTEM_ERROR, TermNil, "mmap could not grow memory at %p, got %p", WorkSpaceTop, a );
return FALSE;
}
WorkSpaceTop = (char *) a + s;
return TRUE;
#endif /* YAPOR */
}
int
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;
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) {
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) {
Error(FATAL_ERROR, TermNil, "could not shmat at %p", MMAP_ADDR);
return(NULL);
}
if (shmctl(shm_id, IPC_RMID, 0) != 0) {
Error(FATAL_ERROR, TermNil, "could not remove shm segment", shm_id);
return(NULL);
}
WorkSpaceTop = (char *) ptr + s;
return(ptr);
}
int
ExtendWorkSpace(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) {
Error(SYSTEM_ERROR, TermNil, "could not shmget %d bytes", s);
return(FALSE);
}
if((ptr = (MALLOC_T)shmat(shm_id, WorkSpaceTop, 0)) == (MALLOC_T) -1) {
Error(SYSTEM_ERROR, TermNil, "could not shmat at %p", MMAP_ADDR);
return(FALSE);
}
if (shmctl(shm_id, IPC_RMID, 0) != 0) {
Error(SYSTEM_ERROR, TermNil, "could not remove shm segment", shm_id);
return(FALSE);
}
WorkSpaceTop = (char *) ptr + s;
return(TRUE);
}
int
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;
MALLOC_T
InitWorkSpace(Int s)
{
MALLOC_T ptr = (MALLOC_T)sbrk(s);
if (ptr == ((MALLOC_T) - 1)) {
Error(FATAL_ERROR, TermNil, "could not allocate %d bytes", s);
return(NULL);
}
return(ptr);
}
int
ExtendWorkSpace(Int s)
{
MALLOC_T ptr = (MALLOC_T)sbrk(s);
if (ptr == ((MALLOC_T) - 1)) {
Error(SYSTEM_ERROR, TermNil, "could not expand stacks over %d bytes", s);
return(FALSE);
}
return TRUE;
}
int
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 < HeapBase || (char *) ptr > HeapTop)
return;
if (!(b->b_size & InUseFlag))
return;
FreeCodeSpace((char *) ptr - 2*sizeof(void *));
}
MALLOC_T
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 */
static int total_space;
MALLOC_T
InitWorkSpace(Int s)
{
MALLOC_T ptr = (MALLOC_T)malloc(s);
total_space = s;
if (ptr == ((MALLOC_T) - 1)) {
Error(FATAL_ERROR, TermNil, "could not allocate %d bytes", s);
return(NULL);
}
return(ptr);
}
int
ExtendWorkSpace(Int s)
{
MALLOC_T ptr;
total_space += s;
ptr = (MALLOC_T)realloc((void *)HeapBase, total_space);
if (ptr == ((MALLOC_T) - 1)) {
Error(SYSTEM_ERROR, TermNil, "could not expand stacks %d bytes", s);
return(FALSE);
}
if (ptr != (MALLOC_T)HeapBase) {
Error(SYSTEM_ERROR, TermNil, "could not expand contiguous stacks %d bytes", s);
return(FALSE);
}
return TRUE;
}
int
FreeWorkSpace(void)
{
return TRUE;
}
#endif
void
YAP_InitHeap(void *heap_addr)
{
/* allocate space */
HeapBase = heap_addr;
/* reserve space for specially allocated functors and atoms so that
their values can be known statically */
HeapTop = HeapBase + AdjustSize(sizeof(all_heap_codes));
HeapMax = HeapUsed = HeapTop-HeapBase;
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
HeapTop = HeapTop + sizeof(YAP_SEG_SIZE);
*((YAP_SEG_SIZE *) HeapTop) = InUseFlag;
HeapPlus = HeapTop + MinHGap / CellSize;
FreeBlocks = NIL;
HEAPTOP_DISOWN(worker_id);
#if defined(YAPOR) || defined(TABLING)
#ifdef USE_HEAP
/* Try to make the system to crash */
BaseAllocArea = NULL;
TopAllocArea = BaseAllocArea;
#else
BaseAllocArea = AllocCodeSpace(OPT_CHUNK_SIZE);
TopAllocArea = BaseAllocArea;
#endif
LOCAL = REMOTE; /* point to the first area */
#endif
}
void
InitMemory(int Trail, int Heap, int Stack)
{
Int pm, sa, ta;
Trail = AdjustPageSize(Trail * K);
Stack = AdjustPageSize(Stack * K);
Heap = AdjustPageSize(Heap * K);
pm = (Trail + Heap + Stack); /* memory to be
* requested */
sa = Stack; /* stack area size */
ta = Trail; /* trail area size */
YAP_InitHeap(InitWorkSpace(pm));
TrailTop = HeapBase + pm;
LocalBase = TrailTop - ta;
TrailBase = LocalBase + sizeof(CELL);
GlobalBase = LocalBase - sa;
AuxTop = GlobalBase - CellSize; /* avoid confusions while
* * restoring */
AuxSp = (CELL *) AuxTop;
#ifdef DEBUG
#if SIZEOF_INT_P!=SIZEOF_INT
if (output_msg) {
fprintf(stderr, "HeapBase = %p GlobalBase = %p\n LocalBase = %p TrailTop = %p\n",
HeapBase, GlobalBase, LocalBase, TrailTop);
#else
if (output_msg) {
fprintf(stderr, "HeapBase = %x GlobalBase = %x\n LocalBase = %x TrailTop = %x\n",
(UInt) HeapBase, (UInt) GlobalBase,
(UInt) LocalBase, (UInt) 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 */
}
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