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nux  3.0.0
AsyncFileWriter.h
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00001 // -*- Mode: C++; indent-tabs-mode: nil; tab-width: 2 -*-
00002 /*
00003  * Copyright 2011 Inalogic® Inc.
00004  *
00005  * This program is free software: you can redistribute it and/or modify it
00006  * under the terms of the GNU Lesser General Public License, as
00007  * published by the  Free Software Foundation; either version 2.1 or 3.0
00008  * of the License.
00009  *
00010  * This program is distributed in the hope that it will be useful, but
00011  * WITHOUT ANY WARRANTY; without even the implied warranties of
00012  * MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
00013  * PURPOSE.  See the applicable version of the GNU Lesser General Public
00014  * License for more details.
00015  *
00016  * You should have received a copy of both the GNU Lesser General Public
00017  * License along with this program. If not, see <http://www.gnu.org/licenses/>
00018  *
00019  * Authored by: Tim Penhey <tim.penhey@canonical.com>
00020  *
00021  */
00022 #ifndef NUXCORE_ASYNC_FILE_WRITER_H
00023 #define NUXCORE_ASYNC_FILE_WRITER_H
00024 
00025 #include <string>
00026 #include <sigc++/sigc++.h>
00027 
00028 namespace nux
00029 {
00030 
00037 class AsyncFileWriter
00038 {
00039 public:
00040   AsyncFileWriter(std::string const& filename);
00041   // Destructor kills any pending async requests, and close the file
00042   // synchronously if it is open.
00043   ~AsyncFileWriter();
00044 
00045   // Queue the data for writing.  It'll happen some time.
00046   void Write(std::string const& data);
00047   // Close the file asynchronously.  When the file is closed, the closed
00048   // signal is emitted.
00049   void Close();
00050 
00051   bool IsClosing() const;
00052 
00053   sigc::signal<void> opened;
00054   sigc::signal<void> closed;
00055 
00056 private:
00057   class Impl;
00058   Impl* pimpl;
00059 };
00060 
00061 }
00062 
00063 #endif