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| 1 /* | |
| 2 * Copyright (C) 2010 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' | |
| 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS | |
| 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| 23 * THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "OSAllocator.h" | |
| 28 | |
| 29 #if OS(WINDOWS) | |
| 30 | |
| 31 #include "windows.h" | |
| 32 #include <wtf/Assertions.h> | |
| 33 | |
| 34 namespace WTF { | |
| 35 | |
| 36 static inline DWORD protection(bool writable, bool executable) | |
| 37 { | |
| 38 return executable ? | |
| 39 (writable ? PAGE_EXECUTE_READWRITE : PAGE_EXECUTE_READ) : | |
| 40 (writable ? PAGE_READWRITE : PAGE_READONLY); | |
| 41 } | |
| 42 | |
| 43 void* OSAllocator::reserveUncommitted(size_t bytes, Usage, bool writable, bool e
xecutable, bool) | |
| 44 { | |
| 45 void* result = VirtualAlloc(0, bytes, MEM_RESERVE, protection(writable, exec
utable)); | |
| 46 if (!result) | |
| 47 CRASH(); | |
| 48 return result; | |
| 49 } | |
| 50 | |
| 51 void* OSAllocator::reserveAndCommit(size_t bytes, Usage, bool writable, bool exe
cutable, bool) | |
| 52 { | |
| 53 void* result = VirtualAlloc(0, bytes, MEM_RESERVE | MEM_COMMIT, protection(w
ritable, executable)); | |
| 54 if (!result) | |
| 55 CRASH(); | |
| 56 return result; | |
| 57 } | |
| 58 | |
| 59 void OSAllocator::commit(void* address, size_t bytes, bool writable, bool execut
able) | |
| 60 { | |
| 61 void* result = VirtualAlloc(address, bytes, MEM_COMMIT, protection(writable,
executable)); | |
| 62 if (!result) | |
| 63 CRASH(); | |
| 64 } | |
| 65 | |
| 66 void OSAllocator::decommit(void* address, size_t bytes) | |
| 67 { | |
| 68 bool result = VirtualFree(address, bytes, MEM_DECOMMIT); | |
| 69 if (!result) | |
| 70 CRASH(); | |
| 71 } | |
| 72 | |
| 73 void OSAllocator::releaseDecommitted(void* address, size_t bytes) | |
| 74 { | |
| 75 // According to http://msdn.microsoft.com/en-us/library/aa366892(VS.85).aspx
, | |
| 76 // dwSize must be 0 if dwFreeType is MEM_RELEASE. | |
| 77 bool result = VirtualFree(address, 0, MEM_RELEASE); | |
| 78 if (!result) | |
| 79 CRASH(); | |
| 80 } | |
| 81 | |
| 82 } // namespace WTF | |
| 83 | |
| 84 #endif // OS(WINDOWS) | |
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Chromium Code Reviews
Issue 14238015:
Move Source/WTF/wtf to Source/wtf (Closed)
Base URL: svn://svn.chromium.org/blink/trunk