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 

    35 void MarkStack::initializePagesize()

    36 {

    37     SYSTEM_INFO system_info;

    38     GetSystemInfo(&system_info);

    39     MarkStack::s_pageSize = system_info.dwPageSize;

    40 }

    41 

    42 void* MarkStack::allocateStack(size_t size)

    43 {

    44     return VirtualAlloc(0, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);

    45 }

    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