| repo sync | baa3858 | 2013-07-26 17:53:31 -0700 | [diff] [blame] | 1 | /* Alloc.c -- Memory allocation functions
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| 2 | 2008-09-24
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| 3 | Igor Pavlov
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| 4 | Public domain */
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| 5 |
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| 6 | #ifdef _WIN32
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| 7 | #include <windows.h>
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| 8 | #endif
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| 9 | #include <stdlib.h>
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| 10 |
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| 11 | #include "Alloc.h"
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| 12 |
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| 13 | /* #define _SZ_ALLOC_DEBUG */
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| 14 |
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| 15 | /* use _SZ_ALLOC_DEBUG to debug alloc/free operations */
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| 16 | #ifdef _SZ_ALLOC_DEBUG
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| 17 | #include <stdio.h>
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| 18 | int g_allocCount = 0;
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| 19 | int g_allocCountMid = 0;
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| 20 | int g_allocCountBig = 0;
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| 21 | #endif
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| 22 |
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| 23 | void *MyAlloc(size_t size)
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| 24 | {
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| 25 | if (size == 0)
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| 26 | return 0;
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| 27 | #ifdef _SZ_ALLOC_DEBUG
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| 28 | {
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| 29 | void *p = malloc(size);
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| 30 | fprintf(stderr, "\nAlloc %10d bytes, count = %10d, addr = %8X", size, g_allocCount++, (unsigned)p);
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| 31 | return p;
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| 32 | }
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| 33 | #else
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| 34 | return malloc(size);
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| 35 | #endif
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| 36 | }
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| 37 |
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| 38 | void MyFree(void *address)
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| 39 | {
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| 40 | #ifdef _SZ_ALLOC_DEBUG
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| 41 | if (address != 0)
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| 42 | fprintf(stderr, "\nFree; count = %10d, addr = %8X", --g_allocCount, (unsigned)address);
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| 43 | #endif
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| 44 | free(address);
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| 45 | }
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| 46 |
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| 47 | #ifdef _WIN32
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| 48 |
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| 49 | void *MidAlloc(size_t size)
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| 50 | {
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| 51 | if (size == 0)
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| 52 | return 0;
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| 53 | #ifdef _SZ_ALLOC_DEBUG
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| 54 | fprintf(stderr, "\nAlloc_Mid %10d bytes; count = %10d", size, g_allocCountMid++);
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| 55 | #endif
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| 56 | return VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
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| 57 | }
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| 58 |
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| 59 | void MidFree(void *address)
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| 60 | {
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| 61 | #ifdef _SZ_ALLOC_DEBUG
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| 62 | if (address != 0)
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| 63 | fprintf(stderr, "\nFree_Mid; count = %10d", --g_allocCountMid);
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| 64 | #endif
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| 65 | if (address == 0)
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| 66 | return;
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| 67 | VirtualFree(address, 0, MEM_RELEASE);
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| 68 | }
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| 69 |
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| 70 | #ifndef MEM_LARGE_PAGES
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| 71 | #undef _7ZIP_LARGE_PAGES
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| 72 | #endif
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| 73 |
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| 74 | #ifdef _7ZIP_LARGE_PAGES
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| 75 | SIZE_T g_LargePageSize = 0;
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| 76 | typedef SIZE_T (WINAPI *GetLargePageMinimumP)();
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| 77 | #endif
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| 78 |
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| 79 | void SetLargePageSize()
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| 80 | {
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| 81 | #ifdef _7ZIP_LARGE_PAGES
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| 82 | SIZE_T size = 0;
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| 83 | GetLargePageMinimumP largePageMinimum = (GetLargePageMinimumP)
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| 84 | GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "GetLargePageMinimum");
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| 85 | if (largePageMinimum == 0)
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| 86 | return;
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| 87 | size = largePageMinimum();
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| 88 | if (size == 0 || (size & (size - 1)) != 0)
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| 89 | return;
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| 90 | g_LargePageSize = size;
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| 91 | #endif
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| 92 | }
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| 93 |
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| 94 |
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| 95 | void *BigAlloc(size_t size)
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| 96 | {
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| 97 | if (size == 0)
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| 98 | return 0;
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| 99 | #ifdef _SZ_ALLOC_DEBUG
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| 100 | fprintf(stderr, "\nAlloc_Big %10d bytes; count = %10d", size, g_allocCountBig++);
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| 101 | #endif
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| 102 |
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| 103 | #ifdef _7ZIP_LARGE_PAGES
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| 104 | if (g_LargePageSize != 0 && g_LargePageSize <= (1 << 30) && size >= (1 << 18))
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| 105 | {
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| 106 | void *res = VirtualAlloc(0, (size + g_LargePageSize - 1) & (~(g_LargePageSize - 1)),
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| 107 | MEM_COMMIT | MEM_LARGE_PAGES, PAGE_READWRITE);
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| 108 | if (res != 0)
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| 109 | return res;
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| 110 | }
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| 111 | #endif
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| 112 | return VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
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| 113 | }
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| 114 |
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| 115 | void BigFree(void *address)
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| 116 | {
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| 117 | #ifdef _SZ_ALLOC_DEBUG
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| 118 | if (address != 0)
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| 119 | fprintf(stderr, "\nFree_Big; count = %10d", --g_allocCountBig);
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| 120 | #endif
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| 121 |
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| 122 | if (address == 0)
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| 123 | return;
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| 124 | VirtualFree(address, 0, MEM_RELEASE);
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| 125 | }
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| 126 |
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| 127 | #endif
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