00001 /*************************************************************************** 00002 ringbuffer.h - description 00003 ------------------- 00004 begin : Sun March 21 2004 00005 copyright : (C) 2004 by Martin Witte 00006 email : witte@kawo1.rwth-aachen.de 00007 ***************************************************************************/ 00008 00009 /*************************************************************************** 00010 * * 00011 * This program is free software; you can redistribute it and/or modify * 00012 * it under the terms of the GNU General Public License as published by * 00013 * the Free Software Foundation; either version 2 of the License, or * 00014 * (at your option) any later version. * 00015 * * 00016 ***************************************************************************/ 00017 00018 #ifndef _KRADIO_RING_BUFFER_H 00019 #define _KRADIO_RING_BUFFER_H 00020 00021 #ifdef HAVE_CONFIG_H 00022 #include <config.h> 00023 #endif 00024 00025 #include <sys/types.h> 00026 00027 class RingBuffer 00028 { 00029 public: 00030 RingBuffer(size_t size); 00031 ~RingBuffer(); 00032 00033 bool resize(size_t new_size); 00034 00035 size_t addData (const char *src, size_t size); 00036 size_t takeData(char *dst, size_t size); 00037 00038 char *getFreeSpace(size_t &size); 00039 size_t removeFreeSpace(size_t size); 00040 00041 char *getData(size_t &size); 00042 size_t removeData(size_t size); 00043 00044 size_t getSize() const { return m_Size; } 00045 size_t getFillSize() const { return m_FillSize; } 00046 size_t getFreeSize() const { return m_Size - m_FillSize; } 00047 00048 void clear(); 00049 00050 protected: 00051 00052 char *m_Buffer; 00053 size_t m_Start; 00054 size_t m_Size, 00055 m_FillSize; 00056 }; 00057 00058 #endif