nuclear@14: /* Alloc.c -- Memory allocation functions
nuclear@14: 2008-09-24
nuclear@14: Igor Pavlov
nuclear@14: Public domain */
nuclear@14: 
nuclear@14: #ifdef _WIN32
nuclear@14: #include <windows.h>
nuclear@14: #endif
nuclear@14: #include <stdlib.h>
nuclear@14: 
nuclear@14: #include "Alloc.h"
nuclear@14: 
nuclear@14: /* #define _SZ_ALLOC_DEBUG */
nuclear@14: 
nuclear@14: /* use _SZ_ALLOC_DEBUG to debug alloc/free operations */
nuclear@14: #ifdef _SZ_ALLOC_DEBUG
nuclear@14: #include <stdio.h>
nuclear@14: int g_allocCount = 0;
nuclear@14: int g_allocCountMid = 0;
nuclear@14: int g_allocCountBig = 0;
nuclear@14: #endif
nuclear@14: 
nuclear@14: void *MyAlloc(size_t size)
nuclear@14: {
nuclear@14:   if (size == 0)
nuclear@14:     return 0;
nuclear@14:   #ifdef _SZ_ALLOC_DEBUG
nuclear@14:   {
nuclear@14:     void *p = malloc(size);
nuclear@14:     fprintf(stderr, "\nAlloc %10d bytes, count = %10d,  addr = %8X", size, g_allocCount++, (unsigned)p);
nuclear@14:     return p;
nuclear@14:   }
nuclear@14:   #else
nuclear@14:   return malloc(size);
nuclear@14:   #endif
nuclear@14: }
nuclear@14: 
nuclear@14: void MyFree(void *address)
nuclear@14: {
nuclear@14:   #ifdef _SZ_ALLOC_DEBUG
nuclear@14:   if (address != 0)
nuclear@14:     fprintf(stderr, "\nFree; count = %10d,  addr = %8X", --g_allocCount, (unsigned)address);
nuclear@14:   #endif
nuclear@14:   free(address);
nuclear@14: }
nuclear@14: 
nuclear@14: #ifdef _WIN32
nuclear@14: 
nuclear@14: void *MidAlloc(size_t size)
nuclear@14: {
nuclear@14:   if (size == 0)
nuclear@14:     return 0;
nuclear@14:   #ifdef _SZ_ALLOC_DEBUG
nuclear@14:   fprintf(stderr, "\nAlloc_Mid %10d bytes;  count = %10d", size, g_allocCountMid++);
nuclear@14:   #endif
nuclear@14:   return VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
nuclear@14: }
nuclear@14: 
nuclear@14: void MidFree(void *address)
nuclear@14: {
nuclear@14:   #ifdef _SZ_ALLOC_DEBUG
nuclear@14:   if (address != 0)
nuclear@14:     fprintf(stderr, "\nFree_Mid; count = %10d", --g_allocCountMid);
nuclear@14:   #endif
nuclear@14:   if (address == 0)
nuclear@14:     return;
nuclear@14:   VirtualFree(address, 0, MEM_RELEASE);
nuclear@14: }
nuclear@14: 
nuclear@14: #ifndef MEM_LARGE_PAGES
nuclear@14: #undef _7ZIP_LARGE_PAGES
nuclear@14: #endif
nuclear@14: 
nuclear@14: #ifdef _7ZIP_LARGE_PAGES
nuclear@14: SIZE_T g_LargePageSize = 0;
nuclear@14: typedef SIZE_T (WINAPI *GetLargePageMinimumP)();
nuclear@14: #endif
nuclear@14: 
nuclear@14: void SetLargePageSize()
nuclear@14: {
nuclear@14:   #ifdef _7ZIP_LARGE_PAGES
nuclear@14:   SIZE_T size = 0;
nuclear@14:   GetLargePageMinimumP largePageMinimum = (GetLargePageMinimumP)
nuclear@14:         GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")), "GetLargePageMinimum");
nuclear@14:   if (largePageMinimum == 0)
nuclear@14:     return;
nuclear@14:   size = largePageMinimum();
nuclear@14:   if (size == 0 || (size & (size - 1)) != 0)
nuclear@14:     return;
nuclear@14:   g_LargePageSize = size;
nuclear@14:   #endif
nuclear@14: }
nuclear@14: 
nuclear@14: 
nuclear@14: void *BigAlloc(size_t size)
nuclear@14: {
nuclear@14:   if (size == 0)
nuclear@14:     return 0;
nuclear@14:   #ifdef _SZ_ALLOC_DEBUG
nuclear@14:   fprintf(stderr, "\nAlloc_Big %10d bytes;  count = %10d", size, g_allocCountBig++);
nuclear@14:   #endif
nuclear@14:   
nuclear@14:   #ifdef _7ZIP_LARGE_PAGES
nuclear@14:   if (g_LargePageSize != 0 && g_LargePageSize <= (1 << 30) && size >= (1 << 18))
nuclear@14:   {
nuclear@14:     void *res = VirtualAlloc(0, (size + g_LargePageSize - 1) & (~(g_LargePageSize - 1)),
nuclear@14:         MEM_COMMIT | MEM_LARGE_PAGES, PAGE_READWRITE);
nuclear@14:     if (res != 0)
nuclear@14:       return res;
nuclear@14:   }
nuclear@14:   #endif
nuclear@14:   return VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
nuclear@14: }
nuclear@14: 
nuclear@14: void BigFree(void *address)
nuclear@14: {
nuclear@14:   #ifdef _SZ_ALLOC_DEBUG
nuclear@14:   if (address != 0)
nuclear@14:     fprintf(stderr, "\nFree_Big; count = %10d", --g_allocCountBig);
nuclear@14:   #endif
nuclear@14:   
nuclear@14:   if (address == 0)
nuclear@14:     return;
nuclear@14:   VirtualFree(address, 0, MEM_RELEASE);
nuclear@14: }
nuclear@14: 
nuclear@14: #endif