icinga2/lib/base/bufferedstream.h

86 lines
2.7 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#ifndef BUFFEREDSTREAM_H
#define BUFFEREDSTREAM_H
#include "base/i2-base.h"
#include "base/stream.h"
#include "base/fifo.h"
namespace icinga
{
/**
* A buffered stream.
*
* @ingroup base
*/
class I2_BASE_API BufferedStream : public Stream
{
public:
DECLARE_PTR_TYPEDEFS(BufferedStream);
BufferedStream(const Stream::Ptr& innerStream, size_t maxBufferSize = 64 * 1024 * 1024);
~BufferedStream(void);
virtual size_t Read(void *buffer, size_t count);
virtual void Write(const void *buffer, size_t count);
virtual void Close(void);
virtual bool IsEof(void) const;
void WaitReadable(size_t count);
void WaitWritable(size_t count);
void MakeNonBlocking(void);
private:
Stream::Ptr m_InnerStream;
bool m_Stopped;
bool m_Eof;
FIFO::Ptr m_RecvQ;
FIFO::Ptr m_SendQ;
bool m_Blocking;
size_t m_MaxBufferSize;
boost::exception_ptr m_Exception;
mutable boost::mutex m_Mutex;
boost::condition_variable m_ReadCV;
boost::condition_variable m_WriteCV;
void ReadThreadProc(void);
void WriteThreadProc(void);
boost::thread m_ReadThread;
boost::thread m_WriteThread;
void InternalWaitWritable(size_t count, boost::mutex::scoped_lock& lock);
void InternalWaitReadable(size_t count, boost::mutex::scoped_lock& lock);
};
}
#endif /* BUFFEREDSTREAM_H */