| 1 | /* Alloc.h -- Memory allocation functions |
| 2 | 2024-01-22 : Igor Pavlov : Public domain */ |
| 3 | |
| 4 | #ifndef ZIP7_INC_ALLOC_H |
| 5 | #define ZIP7_INC_ALLOC_H |
| 6 | |
| 7 | #include "7zTypes.h" |
| 8 | |
| 9 | EXTERN_C_BEGIN |
| 10 | |
| 11 | /* |
| 12 | MyFree(NULL) : is allowed, as free(NULL) |
| 13 | MyAlloc(0) : returns NULL : but malloc(0) is allowed to return NULL or non_NULL |
| 14 | MyRealloc(NULL, 0) : returns NULL : but realloc(NULL, 0) is allowed to return NULL or non_NULL |
| 15 | MyRealloc() is similar to realloc() for the following cases: |
| 16 | MyRealloc(non_NULL, 0) : returns NULL and always calls MyFree(ptr) |
| 17 | MyRealloc(NULL, non_ZERO) : returns NULL, if allocation failed |
| 18 | MyRealloc(non_NULL, non_ZERO) : returns NULL, if reallocation failed |
| 19 | */ |
| 20 | |
| 21 | void *MyAlloc(size_t size); |
| 22 | void MyFree(void *address); |
| 23 | void *MyRealloc(void *address, size_t size); |
| 24 | |
| 25 | void *z7_AlignedAlloc(size_t size); |
| 26 | void z7_AlignedFree(void *p); |
| 27 | |
| 28 | #ifdef _WIN32 |
| 29 | |
| 30 | #ifdef Z7_LARGE_PAGES |
| 31 | void SetLargePageSize(void); |
| 32 | #endif |
| 33 | |
| 34 | void *MidAlloc(size_t size); |
| 35 | void MidFree(void *address); |
| 36 | void *BigAlloc(size_t size); |
| 37 | void BigFree(void *address); |
| 38 | |
| 39 | /* #define Z7_BIG_ALLOC_IS_ZERO_FILLED */ |
| 40 | |
| 41 | #else |
| 42 | |
| 43 | #define MidAlloc(size) z7_AlignedAlloc(size) |
| 44 | #define MidFree(address) z7_AlignedFree(address) |
| 45 | #define BigAlloc(size) z7_AlignedAlloc(size) |
| 46 | #define BigFree(address) z7_AlignedFree(address) |
| 47 | |
| 48 | #endif |
| 49 | |
| 50 | extern const ISzAlloc g_Alloc; |
| 51 | |
| 52 | #ifdef _WIN32 |
| 53 | extern const ISzAlloc g_BigAlloc; |
| 54 | extern const ISzAlloc g_MidAlloc; |
| 55 | #else |
| 56 | #define g_BigAlloc g_AlignedAlloc |
| 57 | #define g_MidAlloc g_AlignedAlloc |
| 58 | #endif |
| 59 | |
| 60 | extern const ISzAlloc g_AlignedAlloc; |
| 61 | |
| 62 | |
| 63 | typedef struct |
| 64 | { |
| 65 | ISzAlloc vt; |
| 66 | ISzAllocPtr baseAlloc; |
| 67 | unsigned numAlignBits; /* ((1 << numAlignBits) >= sizeof(void *)) */ |
| 68 | size_t offset; /* (offset == (k * sizeof(void *)) && offset < (1 << numAlignBits) */ |
| 69 | } CAlignOffsetAlloc; |
| 70 | |
| 71 | void AlignOffsetAlloc_CreateVTable(CAlignOffsetAlloc *p); |
| 72 | |
| 73 | |
| 74 | EXTERN_C_END |
| 75 | |
| 76 | #endif |