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32 #ifndef FileStreamProxy_h
33 #define FileStreamProxy_h
35 #if ENABLE(BLOB) || ENABLE(FILE_SYSTEM)
37 #include "AsyncFileStream.h"
38 #include <wtf/Forward.h>
39 #include <wtf/PassRefPtr.h>
40 #include <wtf/RefCounted.h>
41 #include <wtf/RefPtr.h>
48 class ScriptExecutionContext;
50 // A proxy module that asynchronously calls corresponding FileStream methods on the file thread. Note: you must call stop() first and then release the reference to destruct the FileStreamProxy instance.
51 class FileStreamProxy : public AsyncFileStream {
53 static PassRefPtr<FileStreamProxy> create(ScriptExecutionContext*, FileStreamClient*);
54 virtual ~FileStreamProxy();
56 virtual void getSize(const String& path, double expectedModificationTime);
57 virtual void openForRead(const String& path, long long offset, long long length);
58 virtual void openForWrite(const String& path);
60 virtual void read(char* buffer, int length);
61 virtual void write(const KURL& blobURL, long long position, int length);
62 virtual void truncate(long long position);
64 // Stops the proxy and scedules it to be destructed. All the pending tasks will be aborted and the file stream will be closed.
65 // Note: the caller should deref the instance immediately after calling stop().
69 FileStreamProxy(ScriptExecutionContext*, FileStreamClient*);
71 FileThread* fileThread();
73 // Called on File thread.
74 void startOnFileThread();
75 void stopOnFileThread();
76 void getSizeOnFileThread(const String& path, double expectedModificationTime);
77 void openForReadOnFileThread(const String& path, long long offset, long long length);
78 void openForWriteOnFileThread(const String& path);
79 void closeOnFileThread();
80 void readOnFileThread(char* buffer, int length);
81 void writeOnFileThread(const KURL& blobURL, long long position, int length);
82 void truncateOnFileThread(long long position);
84 RefPtr<ScriptExecutionContext> m_context;
85 RefPtr<FileStream> m_stream;
88 } // namespace WebCore
90 #endif // ENABLE(BLOB) || ENABLE(FILE_SYSTEM)
92 #endif // FileStreamProxy_h