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yap-6.3/H/alloc.h
Vitor Santos Costa 46a32fbd83 heap
2018-09-14 17:43:36 +01:00

142 lines
3.0 KiB
C

/*************************************************************************
* *
* YAP Prolog %W% %G% *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: alloc.h *
* Last rev: *
* mods: *
* comments: allocating space *
* *
*************************************************************************/
/* Space Organization:
The data areas is divided in the following way:
Lower Addresses
HeapBase \
| Atom and code space
HeapTop-1 /
HeapTop \
| Free Space
HeapMax /
GlobalBase-1/
GlobalBase \
| Global Stack
H /
ASP \
| Local stack
LocalBase /
TRBase /
TR \
| Trail
Higher Adresses
*/
/* definitions required by saver/restorer and memory manager */
typedef CELL YAP_SEG_SIZE;
typedef struct FREEB {
YAP_SEG_SIZE b_size;
struct FREEB *b_next;
struct FREEB *b_next_size;
} BlockHeader;
#define K ((Int) 1024)
#define MinBlockSize (sizeof(BlockHeader)+sizeof(YAP_SEG_SIZE))
#define MaxBlockSize 0xffffff
#define InUseFlag 0x80000000
/* the following defines are machine dependant and are used to enforce
the correct alignment for allocated blocks */
#if SIZEOF_INT_P==4
#define YAP_ALIGN 3
#define YAP_ALIGNMASK ((CELL)(-4))
#else
#define YAP_ALIGN 7
#define YAP_ALIGNMASK ((CELL)(-8))
#endif /* ALIGN_LONGS */
#define AdjustSize(X) ((X+YAP_ALIGN) & YAP_ALIGNMASK)
/* SIZE should be a power of 2 */
#define ALIGN_SIZE(X,SIZE) (((CELL)(X)+((SIZE)-1)) & ~((SIZE)-1))
/* I'll assume page size is always a power of two */
#if defined(_WIN32) || defined(__CYGWIN__)
/* in WIN32 VirtualAlloc works in multiples of 64K */
#define YAP_ALLOC_SIZE (64*1024)
#define LGPAGE_SIZE YAP_ALLOC_SIZE
#else
#define YAP_ALLOC_SIZE Yap_page_size
#define LGPAGE_SIZE (16*Yap_page_size)
#endif
#define AdjustPageSize(X) (((X)+ (YAP_ALLOC_SIZE-1))/YAP_ALLOC_SIZE)*YAP_ALLOC_SIZE;
#define AdjustLargePageSize(X) (((X)+ (LGPAGE_SIZE-1))/LGPAGE_SIZE)*LGPAGE_SIZE;
#define BlockTrailer(b) ((YAP_SEG_SIZE *)b)[((BlockHeader *) b)->b_size]
/* Operating system and architecture dependent page size */
extern size_t Yap_page_size;
extern void Yap_InitHeap(void *);
extern UInt Yap_ExtendWorkSpaceThroughHole(UInt);
extern void Yap_AllocHole(UInt, UInt);
extern size_t Yap_HeapUsed(void);
;
#if USE_SYSTEM_MMAP && ! defined(__CYGWIN__)
#include <sys/types.h>
#include <sys/mman.h>
#elif USE_SYSTEM_SHM
#elif USE_SBRK
#if (defined(__svr4__) || defined(__SVR4))
#include <unistd.h>
#elif sun
#include <sys/types.h>
#include <malloc.h>
void *sbrk(caddr_t);
typedef unsigned size_t;
extern MALLOC_T malloc(size_t);
extern void free(MALLOC_T);
extern MALLOC_T realloc(MALLOC_T,size_t);
extern MALLOC_T calloc(size_t,size_t);
#endif
#else
#endif
void Yap_add_memory_hole(ADDR, ADDR);
#define SCRATCH_START_SIZE K64
#define SCRATCH_INC_SIZE K64