JavaScriptCore-1097.3.tar.gz

[apple/javascriptcore.git] / wtf / PageAllocatorSymbian.h

diff --git a/wtf/PageAllocatorSymbian.h b/wtf/PageAllocatorSymbian.h
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-/*
- * Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer. 
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution. 
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef PageAllocatorSymbian_h
-#define PageAllocatorSymbian_h
-
-#include <e32std.h>
-#include <wtf/Bitmap.h>
-
-namespace WTF { 
-
-size_t pageSize();
-
-// Convenience wrapper around an RChunk
-class SymbianChunk : public RChunk {
-   
-public:   
-    SymbianChunk(TInt handle) 
-    {
-        SetHandle(handle);
-        // prevent kernel calls by caching these
-        m_base = reinterpret_cast<char*>(Base()); 
-        m_maxSize = MaxSize();
-    }
-    
-    ~SymbianChunk() 
-    { 
-        Decommit(0, m_maxSize);
-        Close();
-    }
-     
-    // checks if address is in chunk's virtual address space
-    bool contains(const void* address) const 
-    {
-        return (static_cast<const char*>(address) >= m_base && static_cast<const char*>(address) < (m_base + m_maxSize));  
-    }
-    
-    char* m_base; 
-    size_t m_maxSize; 
-    
-};
-
-// Size of the large up-front reservation
-#if defined(__WINS__) 
-// Emulator has limited virtual address space
-const size_t largeReservationSize = 96*1024*1024;
-#else
-// HW has plenty of virtual addresses
-const size_t largeReservationSize = 256*1024*1024;
-#endif
-
-class PageAllocatorSymbian { 
-
-public:     
-    PageAllocatorSymbian();
-    ~PageAllocatorSymbian();
-    
-    void* reserve(size_t);
-    void release(void*, size_t);
-    bool commit(void*, size_t);
-    bool decommit(void*, size_t);
-    
-    bool contains(const void*) const; 
-    
-private:     
-    static const size_t m_pageSize = 4096; 
-    SymbianChunk* m_chunk; 
-    Bitmap<largeReservationSize / m_pageSize> m_map;
-    
-};
-
-} // namespace WTF
-
-#endif // PageAllocatorSymbian_h
-