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Alloc.c
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/* Alloc.c -- Memory allocation functions
2008-09-24
Igor Pavlov
Public domain */
#ifdef _WIN32
#include <windows.h>
#endif
#include <stdlib.h>
#include "Alloc.h"
/* #define _SZ_ALLOC_DEBUG */
/* use _SZ_ALLOC_DEBUG to debug alloc/free operations */
#ifdef _SZ_ALLOC_DEBUG
#include <stdio.h>
int g_allocCount = 0;
int g_allocCountMid = 0;
int g_allocCountBig = 0;
#endif
void *MyAlloc(size_t size)
{
if (size == 0)
return 0;
#ifdef _SZ_ALLOC_DEBUG
{
void *p = malloc(size);
fprintf(stderr, "\nAlloc %10d bytes, count = %10d, addr = %8X", size, g_allocCount++, (unsigned)p);
return p;
}
#else
return malloc(size);
#endif
}
void MyFree(void *address)
{
#ifdef _SZ_ALLOC_DEBUG
if (address != 0)
fprintf(stderr, "\nFree; count = %10d, addr = %8X", --g_allocCount, (unsigned)address);
#endif
free(address);
}
#ifdef _WIN32
void *MidAlloc(size_t size)
{
if (size == 0)
return 0;
#ifdef _SZ_ALLOC_DEBUG
fprintf(stderr, "\nAlloc_Mid %10d bytes; count = %10d", size, g_allocCountMid++);
#endif
return VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
}
void MidFree(void *address)
{
#ifdef _SZ_ALLOC_DEBUG
if (address != 0)
fprintf(stderr, "\nFree_Mid; count = %10d", --g_allocCountMid);
#endif
if (address == 0)
return;
VirtualFree(address, 0, MEM_RELEASE);
}
#ifndef MEM_LARGE_PAGES
#undef _7ZIP_LARGE_PAGES
#endif
#ifdef _7ZIP_LARGE_PAGES
SIZE_T g_LargePageSize = 0;
typedef SIZE_T (WINAPI *GetLargePageMinimumP)();
#endif
void SetLargePageSize()
{
#ifdef _7ZIP_LARGE_PAGES
SIZE_T size = 0;
GetLargePageMinimumP largePageMinimum = (GetLargePageMinimumP)
GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "GetLargePageMinimum");
if (largePageMinimum == 0)
return;
size = largePageMinimum();
if (size == 0 || (size & (size - 1)) != 0)
return;
g_LargePageSize = size;
#endif
}
void *BigAlloc(size_t size)
{
if (size == 0)
return 0;
#ifdef _SZ_ALLOC_DEBUG
fprintf(stderr, "\nAlloc_Big %10d bytes; count = %10d", size, g_allocCountBig++);
#endif
#ifdef _7ZIP_LARGE_PAGES
if (g_LargePageSize != 0 && g_LargePageSize <= (1 << 30) && size >= (1 << 18))
{
void *res = VirtualAlloc(0, (size + g_LargePageSize - 1) & (~(g_LargePageSize - 1)),
MEM_COMMIT | MEM_LARGE_PAGES, PAGE_READWRITE);
if (res != 0)
return res;
}
#endif
return VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
}
void BigFree(void *address)
{
#ifdef _SZ_ALLOC_DEBUG
if (address != 0)
fprintf(stderr, "\nFree_Big; count = %10d", --g_allocCountBig);
#endif
if (address == 0)
return;
VirtualFree(address, 0, MEM_RELEASE);
}
#endif

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Alloc.c (2 KB)

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