| /* |
| Copyright 2005-2010 Intel Corporation. All Rights Reserved. |
| |
| This file is part of Threading Building Blocks. |
| |
| Threading Building Blocks is free software; you can redistribute it |
| and/or modify it under the terms of the GNU General Public License |
| version 2 as published by the Free Software Foundation. |
| |
| Threading Building Blocks is distributed in the hope that it will be |
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with Threading Building Blocks; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| As a special exception, you may use this file as part of a free software |
| library without restriction. Specifically, if other files instantiate |
| templates or use macros or inline functions from this file, or you compile |
| this file and link it with other files to produce an executable, this |
| file does not by itself cause the resulting executable to be covered by |
| the GNU General Public License. This exception does not however |
| invalidate any other reasons why the executable file might be covered by |
| the GNU General Public License. |
| */ |
| |
| #ifndef _itt_shared_malloc_MapMemory_H |
| #define _itt_shared_malloc_MapMemory_H |
| |
| #if __linux__ || __APPLE__ || __sun || __FreeBSD__ |
| |
| #if __sun && !defined(_XPG4_2) |
| // To have void* as mmap's 1st argument |
| #define _XPG4_2 1 |
| #define XPG4_WAS_DEFINED 1 |
| #endif |
| |
| #include <sys/mman.h> |
| |
| #if XPG4_WAS_DEFINED |
| #undef _XPG4_2 |
| #undef XPG4_WAS_DEFINED |
| #endif |
| |
| #define MEMORY_MAPPING_USES_MALLOC 0 |
| void* MapMemory (size_t bytes) |
| { |
| void* result = 0; |
| #ifndef MAP_ANONYMOUS |
| // Mac OS* X defines MAP_ANON, which is deprecated in Linux. |
| #define MAP_ANONYMOUS MAP_ANON |
| #endif /* MAP_ANONYMOUS */ |
| result = mmap(result, bytes, (PROT_READ | PROT_WRITE), MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
| return result==MAP_FAILED? 0: result; |
| } |
| |
| int UnmapMemory(void *area, size_t bytes) |
| { |
| return munmap(area, bytes); |
| } |
| |
| #elif _WIN32 || _WIN64 |
| #include <windows.h> |
| |
| #define MEMORY_MAPPING_USES_MALLOC 0 |
| void* MapMemory (size_t bytes) |
| { |
| /* Is VirtualAlloc thread safe? */ |
| return VirtualAlloc(NULL, bytes, (MEM_RESERVE | MEM_COMMIT | MEM_TOP_DOWN), PAGE_READWRITE); |
| } |
| |
| int UnmapMemory(void *area, size_t bytes) |
| { |
| BOOL result = VirtualFree(area, 0, MEM_RELEASE); |
| return !result; |
| } |
| |
| #else |
| #include <stdlib.h> |
| |
| #define MEMORY_MAPPING_USES_MALLOC 1 |
| void* MapMemory (size_t bytes) |
| { |
| return malloc( bytes ); |
| } |
| |
| int UnmapMemory(void *area, size_t bytes) |
| { |
| free( area ); |
| return 0; |
| } |
| |
| #endif /* OS dependent */ |
| |
| #if MALLOC_CHECK_RECURSION && MEMORY_MAPPING_USES_MALLOC |
| #error Impossible to protect against malloc recursion when memory mapping uses malloc. |
| #endif |
| |
| #endif /* _itt_shared_malloc_MapMemory_H */ |