The Tor Browser: js/src/yarr/PageBlock.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * vim: set ts=8 sts=4 et sw=4 tw=99:

     3  *

     4  * ***** BEGIN LICENSE BLOCK *****

     5  * Copyright (C) 2010 Apple Inc. All rights reserved.

     6  *

     7  * Redistribution and use in source and binary forms, with or without

     8  * modification, are permitted provided that the following conditions

     9  * are met:

    10  * 1. Redistributions of source code must retain the above copyright

    11  *    notice, this list of conditions and the following disclaimer.

    12  * 2. Redistributions in binary form must reproduce the above copyright

    13  *    notice, this list of conditions and the following disclaimer in the

    14  *    documentation and/or other materials provided with the distribution.

    15  *

    16  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

    17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

    18  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

    20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

    26  * THE POSSIBILITY OF SUCH DAMAGE.

    27  *

    28  * ***** END LICENSE BLOCK ***** */

    30 #include "yarr/PageBlock.h"

    31 #include "assembler/wtf/Assertions.h"

    33 #if WTF_OS_UNIX && !WTF_OS_SYMBIAN

    34 #include <unistd.h>

    35 #endif

    37 #if WTF_OS_WINDOWS

    38 #include <malloc.h>

    39 #include <windows.h>

    40 #endif

    42 #if WTF_OS_SYMBIAN

    43 #include <e32hal.h>

    44 #include <e32std.h>

    45 #endif

    47 #if WTF_OS_OS2

    48 #include <stdlib.h>

    49 #endif

    51 namespace WTF {

    53 static size_t s_pageSize;

    55 #if (WTF_OS_UNIX && !WTF_OS_SYMBIAN) || WTF_OS_OS2

    57 inline size_t systemPageSize()

    58 {

    59     return getpagesize();

    60 }

    62 #elif WTF_OS_WINDOWS

    64 inline size_t systemPageSize()

    65 {

    66     static size_t size = 0;

    67     SYSTEM_INFO system_info;

    68     GetSystemInfo(&system_info);

    69     size = system_info.dwPageSize;

    70     return size;

    71 }

    73 #elif WTF_OS_SYMBIAN

    75 inline size_t systemPageSize()

    76 {

    77     static TInt page_size = 0;

    78     UserHal::PageSizeInBytes(page_size);

    79     return page_size;

    80 }

    82 #endif

    84 size_t pageSize()

    85 {

    86     if (!s_pageSize)

    87         s_pageSize = systemPageSize();

    88     ASSERT(isPowerOfTwo(s_pageSize));

    89     return s_pageSize;

    90 }

    92 } // namespace WTF

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