1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/yarr/OSAllocatorWin.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,89 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + *
1.7 + * ***** BEGIN LICENSE BLOCK *****
1.8 + * Copyright (C) 2010 Apple Inc. All rights reserved.
1.9 + *
1.10 + * Redistribution and use in source and binary forms, with or without
1.11 + * modification, are permitted provided that the following conditions
1.12 + * are met:
1.13 + * 1. Redistributions of source code must retain the above copyright
1.14 + * notice, this list of conditions and the following disclaimer.
1.15 + * 2. Redistributions in binary form must reproduce the above copyright
1.16 + * notice, this list of conditions and the following disclaimer in the
1.17 + * documentation and/or other materials provided with the distribution.
1.18 + *
1.19 + * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
1.20 + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.21 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.22 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
1.23 + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.24 + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.25 + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.26 + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.27 + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.28 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
1.29 + * THE POSSIBILITY OF SUCH DAMAGE.
1.30 + *
1.31 + * ***** END LICENSE BLOCK ***** */
1.32 +
1.33 +#include "assembler/wtf/Platform.h"
1.34 +
1.35 +#if ENABLE_ASSEMBLER && WTF_OS_WINDOWS
1.36 +
1.37 +#include <windows.h>
1.38 +#include "assembler/wtf/Assertions.h"
1.39 +
1.40 +#include "yarr/OSAllocator.h"
1.41 +
1.42 +namespace WTF {
1.43 +
1.44 +static inline DWORD protection(bool writable, bool executable)
1.45 +{
1.46 + return executable ?
1.47 + (writable ? PAGE_EXECUTE_READWRITE : PAGE_EXECUTE_READ) :
1.48 + (writable ? PAGE_READWRITE : PAGE_READONLY);
1.49 +}
1.50 +
1.51 +void* OSAllocator::reserveUncommitted(size_t bytes, Usage, bool writable, bool executable)
1.52 +{
1.53 + void* result = VirtualAlloc(0, bytes, MEM_RESERVE, protection(writable, executable));
1.54 + if (!result)
1.55 + CRASH();
1.56 + return result;
1.57 +}
1.58 +
1.59 +void* OSAllocator::reserveAndCommit(size_t bytes, Usage, bool writable, bool executable)
1.60 +{
1.61 + void* result = VirtualAlloc(0, bytes, MEM_RESERVE | MEM_COMMIT, protection(writable, executable));
1.62 + if (!result)
1.63 + CRASH();
1.64 + return result;
1.65 +}
1.66 +
1.67 +void OSAllocator::commit(void* address, size_t bytes, bool writable, bool executable)
1.68 +{
1.69 + void* result = VirtualAlloc(address, bytes, MEM_COMMIT, protection(writable, executable));
1.70 + if (!result)
1.71 + CRASH();
1.72 +}
1.73 +
1.74 +void OSAllocator::decommit(void* address, size_t bytes)
1.75 +{
1.76 + bool result = VirtualFree(address, bytes, MEM_DECOMMIT);
1.77 + if (!result)
1.78 + CRASH();
1.79 +}
1.80 +
1.81 +void OSAllocator::releaseDecommitted(void* address, size_t bytes)
1.82 +{
1.83 + // According to http://msdn.microsoft.com/en-us/library/aa366892(VS.85).aspx,
1.84 + // dwSize must be 0 if dwFreeType is MEM_RELEASE.
1.85 + bool result = VirtualFree(address, 0, MEM_RELEASE);
1.86 + if (!result)
1.87 + CRASH();
1.88 +}
1.89 +
1.90 +} // namespace WTF
1.91 +
1.92 +#endif
