icinga2/lib/base/fifo.hpp

64 lines
2.1 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 FIFO_H
#define FIFO_H
#include "base/i2-base.hpp"
#include "base/stream.hpp"
namespace icinga
{
/**
* A byte-based FIFO buffer.
*
* @ingroup base
*/
class I2_BASE_API FIFO : public Stream
{
public:
DECLARE_PTR_TYPEDEFS(FIFO);
static const size_t BlockSize = 16 * 1024;
FIFO(void);
~FIFO(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;
size_t GetAvailableBytes(void) const;
private:
char *m_Buffer;
size_t m_DataSize;
size_t m_AllocSize;
size_t m_Offset;
void ResizeBuffer(size_t newSize, bool decrease);
void Optimize(void);
};
}
#endif /* FIFO_H */