Home | History | Annotate | Download | only in wtf 
      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 "PageBlock.h"
     28 
     29 #if OS(UNIX) && !OS(SYMBIAN)
     30 #include <unistd.h>
     31 #endif
     32 
     33 #if OS(WINDOWS)
     34 #include <malloc.h>
     35 #include <windows.h>
     36 #endif
     37 
     38 #if OS(SYMBIAN)
     39 #include <e32hal.h>
     40 #include <e32std.h>
     41 #endif
     42 
     43 namespace WTF {
     44 
     45 static size_t s_pageSize;
     46 
     47 #if OS(UNIX) && !OS(SYMBIAN)
     48 
     49 inline size_t systemPageSize()
     50 {
     51     return getpagesize();
     52 }
     53 
     54 #elif OS(WINDOWS)
     55 
     56 inline size_t systemPageSize()
     57 {
     58     static size_t size = 0;
     59     SYSTEM_INFO system_info;
     60     GetSystemInfo(&system_info);
     61     size = system_info.dwPageSize;
     62     return size;
     63 }
     64 
     65 #elif OS(SYMBIAN)
     66 
     67 inline size_t systemPageSize()
     68 {
     69     static TInt page_size = 0;
     70     UserHal::PageSizeInBytes(page_size);
     71     return page_size;
     72 }
     73 
     74 #endif
     75 
     76 size_t pageSize()
     77 {
     78     if (!s_pageSize)
     79         s_pageSize = systemPageSize();
     80     ASSERT(isPowerOfTwo(s_pageSize));
     81     return s_pageSize;
     82 }
     83 
     84 } // namespace WTF
     85