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71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/* Alloc.h -- Memory allocation functions
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2023-03-04 : Igor Pavlov : Public domain */
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#ifndef ZIP7_INC_ALLOC_H
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#define ZIP7_INC_ALLOC_H
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#include "7zTypes.h"
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EXTERN_C_BEGIN
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/*
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MyFree(NULL) : is allowed, as free(NULL)
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MyAlloc(0) : returns NULL : but malloc(0) is allowed to return NULL or non_NULL
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MyRealloc(NULL, 0) : returns NULL : but realloc(NULL, 0) is allowed to return NULL or non_NULL
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MyRealloc() is similar to realloc() for the following cases:
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MyRealloc(non_NULL, 0) : returns NULL and always calls MyFree(ptr)
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MyRealloc(NULL, non_ZERO) : returns NULL, if allocation failed
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MyRealloc(non_NULL, non_ZERO) : returns NULL, if reallocation failed
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*/
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void *MyAlloc(size_t size);
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void MyFree(void *address);
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void *MyRealloc(void *address, size_t size);
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#ifdef _WIN32
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#ifdef Z7_LARGE_PAGES
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void SetLargePageSize(void);
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#endif
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void *MidAlloc(size_t size);
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void MidFree(void *address);
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void *BigAlloc(size_t size);
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void BigFree(void *address);
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#else
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#define MidAlloc(size) MyAlloc(size)
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#define MidFree(address) MyFree(address)
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#define BigAlloc(size) MyAlloc(size)
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#define BigFree(address) MyFree(address)
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#endif
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extern const ISzAlloc g_Alloc;
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#ifdef _WIN32
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extern const ISzAlloc g_BigAlloc;
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extern const ISzAlloc g_MidAlloc;
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#else
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#define g_BigAlloc g_AlignedAlloc
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#define g_MidAlloc g_AlignedAlloc
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#endif
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extern const ISzAlloc g_AlignedAlloc;
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typedef struct
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{
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ISzAlloc vt;
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ISzAllocPtr baseAlloc;
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unsigned numAlignBits; /* ((1 << numAlignBits) >= sizeof(void *)) */
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size_t offset; /* (offset == (k * sizeof(void *)) && offset < (1 << numAlignBits) */
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} CAlignOffsetAlloc;
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void AlignOffsetAlloc_CreateVTable(CAlignOffsetAlloc *p);
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EXTERN_C_END
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#endif
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