141 lines
3.0 KiB
C
141 lines
3.0 KiB
C
/*************************************************************************
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* *
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* YAP Prolog %W% %G% *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: alloc.h *
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* Last rev: *
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* mods: *
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* comments: allocating space *
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* *
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*************************************************************************/
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/* Space Organization:
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The data areas is divided in the following way:
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Lower Addresses
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HeapBase \
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| Atom and code space
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HeapTop-1 /
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HeapTop \
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| Free Space
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HeapMax /
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GlobalBase-1/
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GlobalBase \
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| Global Stack
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H /
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ASP \
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| Local stack
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LocalBase /
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TRBase /
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TR \
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| Trail
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Higher Adresses
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*/
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/* definitions required by saver/restorer and memory manager */
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typedef CELL YAP_SEG_SIZE;
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typedef struct FREEB {
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YAP_SEG_SIZE b_size;
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struct FREEB *b_next;
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struct FREEB *b_next_size;
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} BlockHeader;
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#define K ((Int) 1024)
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#define MinBlockSize (sizeof(BlockHeader)+sizeof(YAP_SEG_SIZE))
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#define MaxBlockSize 0xffffff
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#define InUseFlag 0x80000000
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/* the following defines are machine dependant and are used to enforce
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the correct alignment for allocated blocks */
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#if SIZEOF_INT_P==4
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#define YAP_ALIGN 3
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#define YAP_ALIGNMASK 0xfffffffc
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#else
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#define YAP_ALIGN 7
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#define YAP_ALIGNMASK 0xfffffff8L
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#endif /* ALIGN_LONGS */
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#define AdjustSize(X) ((X+YAP_ALIGN) & YAP_ALIGNMASK)
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/* SIZE should be a power of 2 */
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#define ALIGN_SIZE(X,SIZE) (((CELL)(X)+((SIZE)-1)) & ~((SIZE)-1))
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/* I'll assume page size is always a power of two */
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#if defined(_WIN32) || defined(__CYGWIN__)
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/* in WIN32 VirtualAlloc works in multiples of 64K */
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#define YAP_ALLOC_SIZE (64*1024)
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#define LGPAGE_SIZE YAP_ALLOC_SIZE
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#else
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#define YAP_ALLOC_SIZE Yap_page_size
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#define LGPAGE_SIZE (16*Yap_page_size)
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#endif
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#define AdjustPageSize(X) (((X)+ (YAP_ALLOC_SIZE-1))/YAP_ALLOC_SIZE)*YAP_ALLOC_SIZE;
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#define AdjustLargePageSize(X) (((X)+ (LGPAGE_SIZE-1))/LGPAGE_SIZE)*LGPAGE_SIZE;
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#define BlockTrailer(b) ((YAP_SEG_SIZE *)b)[((BlockHeader *) b)->b_size]
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/* Operating system and architecture dependent page size */
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extern int Yap_page_size;
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void STD_PROTO(Yap_InitHeap, (void *));
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UInt STD_PROTO(Yap_ExtendWorkSpaceThroughHole, (UInt));
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void STD_PROTO(Yap_AllocHole, (UInt, UInt));
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#if USE_MMAP && ! defined(__CYGWIN__)
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#include <sys/types.h>
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#include <sys/mman.h>
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#elif USE_SHM
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#elif USE_SBRK
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#if (defined(__svr4__) || defined(__SVR4))
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#include <unistd.h>
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#elif sun
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#include <sys/types.h>
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#include <malloc.h>
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void *sbrk(caddr_t);
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typedef unsigned size_t;
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MALLOC_T malloc(size_t);
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void free(MALLOC_T);
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MALLOC_T realloc(MALLOC_T,size_t);
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MALLOC_T calloc(size_t,size_t);
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#endif
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#else
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#endif
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void Yap_add_memory_hole(ADDR, ADDR);
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#define SCRATCH_START_SIZE K64
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#define SCRATCH_INC_SIZE K64
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