1/* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * Copyright (C) 2010, 2012 Apple Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#ifndef AsyncFileStream_h 33#define AsyncFileStream_h 34 35#include <wtf/Forward.h> 36#include <wtf/RefCounted.h> 37#include <wtf/RefPtr.h> 38 39namespace WebCore { 40 41class FileStreamClient; 42class FileStream; 43class URL; 44 45class AsyncFileStream : public RefCounted<AsyncFileStream> { 46public: 47 static PassRefPtr<AsyncFileStream> create(FileStreamClient*); 48 ~AsyncFileStream(); 49 50 void getSize(const String& path, double expectedModificationTime); 51 void openForRead(const String& path, long long offset, long long length); 52 void openForWrite(const String& path); 53 void close(); 54 void read(char* buffer, int length); 55 void write(const URL& blobURL, long long position, int length); 56 void truncate(long long position); 57 58 // Stops the proxy and schedules it to be destructed. All the pending tasks will be aborted and the file stream will be closed. 59 // Note: the caller should deref the instance immediately after calling stop(). 60 void stop(); 61 62 FileStreamClient* client() const { return m_client; } 63 void setClient(FileStreamClient* client) { m_client = client; } 64 65private: 66 AsyncFileStream(FileStreamClient*); 67 68 RefPtr<FileStream> m_stream; 69 FileStreamClient* m_client; 70}; 71 72} // namespace WebCore 73 74#endif // AsyncFileStream_h 75