135 lines
2.8 KiB
C
135 lines
2.8 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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AuxSp \
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| Auxiliary stack
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AuxTop /
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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 MinBlockSize (sizeof(BlockHeader)+sizeof(YAP_SEG_SIZE))
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#define MaxBlockSize 0xffffff
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#define InUseFlag 0x1000000
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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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#define ALIGN_YAPTYPE(X,TYPE) (((CELL)(X)+(sizeof(TYPE)-1)) & ~(sizeof(TYPE)-1))
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/* I'll assume page size is always a power of two */
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#define AdjustPageSize(X) ((X) & (_YAP_page_size-1) ? \
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((X) + _YAP_page_size) & (~(_YAP_page_size-1)) : \
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(X) )
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#define BlockTrailer(b) ((YAP_SEG_SIZE *)b)[((BlockHeader *) b)->b_size]
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#define FreeBlocks heap_regs->free_blocks
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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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#if USE_MMAP
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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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#if defined(YAPOR) || defined(THREADS)
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#define HEAPTOP_OWNER(worker_id) ((worker_id) == HeapTopOwner)
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#define HEAPTOP_OWN(worker_id) (HeapTopOwner = (worker_id))
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#define HEAPTOP_DISOWN(worker_id) (HeapTopOwner = -1)
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#else
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#define HEAPTOP_OWNER(worker_id) (FALSE)
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#define HEAPTOP_OWN(worker_id)
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#define HEAPTOP_DISOWN(worker_id)
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#endif
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