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DependentExtensions/cat/io/ThreadPoolFiles.hpp

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+/*
+	Copyright (c) 2009-2010 Christopher A. Taylor.  All rights reserved.
+
+	Redistribution and use in source and binary forms, with or without
+	modification, are permitted provided that the following conditions are met:
+
+	* Redistributions of source code must retain the above copyright notice,
+	  this list of conditions and the following disclaimer.
+	* 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.
+	* Neither the name of LibCat 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT HOLDER OR 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 CAT_THREAD_POOL_FILES_HPP
+#define CAT_THREAD_POOL_FILES_HPP
+
+#include <cat/threads/ThreadPool.hpp>
+#include <cat/port/FastDelegate.h>
+
+#if defined(CAT_OS_WINDOWS)
+# include <cat/port/WindowsInclude.hpp>
+#endif
+
+namespace cat {
+
+
+enum AsyncFileModes
+{
+	ASYNCFILE_READ = 1,
+	ASYNCFILE_WRITE = 2,
+	ASYNCFILE_RANDOM = 4
+};
+
+class AsyncFile : public ThreadRefObject
+{
+	HANDLE _file;
+
+protected:
+	char _file_path[MAX_PATH+1];
+
+public:
+	AsyncFile(int priorityLevel);
+	virtual ~AsyncFile();
+
+public:
+	bool Valid();
+	const char *GetFilePath();
+
+public:
+	/*
+		In read mode, Open() will fail if the file does not exist.
+		In write mode, Open() will create the file if it does not exist.
+	*/
+	bool Open(const char *file_path, u32 async_file_modes);
+	void Close();
+
+	bool SetSize(u64 bytes);
+	u64 GetSize();
+
+	bool Read(AsyncBuffer *buffer, u64 offset, const AsyncCallback &callback);
+	bool Write(AsyncBuffer *buffer, u64 offset, const AsyncCallback &callback = 0);
+};
+
+
+} // namespace cat
+
+#endif // CAT_THREAD_POOL_FILES_HPP