1 /*
2 * Copyright (C) 2009 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "MarkStack.h"
28
29 #if OS(WINDOWS)
30
31 #include "windows.h"
32
33 namespace JSC {
34
initializePagesize()35 void MarkStack::initializePagesize()
36 {
37 SYSTEM_INFO system_info;
38 GetSystemInfo(&system_info);
39 MarkStack::s_pageSize = system_info.dwPageSize;
40 }
41
allocateStack(size_t size)42 void* MarkStack::allocateStack(size_t size)
43 {
44 return VirtualAlloc(0, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
45 }
releaseStack(void * addr,size_t)46 void MarkStack::releaseStack(void* addr, size_t)
47 {
48 // According to http://msdn.microsoft.com/en-us/library/aa366892(VS.85).aspx,
49 // dwSize must be 0 if dwFreeType is MEM_RELEASE.
50 VirtualFree(addr, 0, MEM_RELEASE);
51 }
52
53 }
54
55 #endif
56