1/* 2 * Copyright (C) 2012 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#ifndef ResourceBuffer_h 27#define ResourceBuffer_h 28 29#include "SharedBuffer.h" 30 31#include <wtf/PassOwnPtr.h> 32#include <wtf/PassRefPtr.h> 33#include <wtf/RefCounted.h> 34 35#if USE(FOUNDATION) 36OBJC_CLASS NSData; 37#endif 38 39namespace WebCore { 40 41class PurgeableBuffer; 42class SharedBuffer; 43 44class ResourceBuffer : public RefCounted<ResourceBuffer> { 45public: 46 47 static PassRefPtr<ResourceBuffer> create() { return adoptRef(new ResourceBuffer); } 48 static PassRefPtr<ResourceBuffer> create(const char* data, unsigned size) { return adoptRef(new ResourceBuffer(data, size)); } 49 static PassRefPtr<ResourceBuffer> adoptSharedBuffer(PassRefPtr<SharedBuffer> shared) { return shared ? adoptRef(new ResourceBuffer(shared)) : 0; } 50 51 virtual ~ResourceBuffer(); 52 53 virtual const char* data() const; 54 virtual unsigned size() const; 55 virtual bool isEmpty() const; 56 57 void append(const char*, unsigned); 58 void append(SharedBuffer*); 59#if USE(NETWORK_CFDATA_ARRAY_CALLBACK) 60 void append(CFDataRef); 61#endif 62 void clear(); 63 64 unsigned getSomeData(const char*& data, unsigned position = 0) const; 65 66 SharedBuffer* sharedBuffer() const; 67#if USE(FOUNDATION) 68 void tryReplaceSharedBufferContents(SharedBuffer*); 69#endif 70 PassRefPtr<ResourceBuffer> copy() const; 71 72 bool hasPurgeableBuffer() const; 73 void createPurgeableBuffer() const; 74 75#if PLATFORM(IOS) 76 // FIXME: Remove PLATFORM(IOS)-guard once we upstream the iOS changes to SharedBuffer.{cpp, h} and SharedBufferCF.cpp. 77 void setShouldUsePurgeableMemory(bool); 78#endif 79 80 // Ensure this buffer has no other clients before calling this. 81 PassOwnPtr<PurgeableBuffer> releasePurgeableBuffer(); 82 83#if USE(FOUNDATION) 84 RetainPtr<NSData> createNSData(); 85#endif 86#if USE(CF) 87 RetainPtr<CFDataRef> createCFData(); 88#endif 89#if ENABLE(DISK_IMAGE_CACHE) 90 bool isUsingDiskImageCache() const; 91#endif 92 93protected: 94 ResourceBuffer(); 95 96private: 97 ResourceBuffer(const char*, unsigned); 98 ResourceBuffer(PassRefPtr<SharedBuffer>); 99 100 RefPtr<SharedBuffer> m_sharedBuffer; 101}; 102 103} // namespace WebCore 104 105#endif // ResourceBuffer_h 106