RAUL
0.7.0
|
00001 /* This file is part of Raul. 00002 * Copyright (C) 2007-2009 David Robillard <http://drobilla.net> 00003 * 00004 * Raul is free software; you can redistribute it and/or modify it under the 00005 * terms of the GNU General Public License as published by the Free Software 00006 * Foundation; either version 2 of the License, or (at your option) any later 00007 * version. 00008 * 00009 * Raul is distributed in the hope that it will be useful, but WITHOUT ANY 00010 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 00011 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details. 00012 * 00013 * You should have received a copy of the GNU General Public License along 00014 * with this program; if not, write to the Free Software Foundation, Inc., 00015 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00016 */ 00017 00018 #ifndef RAUL_EVENT_RING_BUFFER_HPP 00019 #define RAUL_EVENT_RING_BUFFER_HPP 00020 00021 #include <cassert> 00022 #include <algorithm> 00023 #include "raul/RingBuffer.hpp" 00024 #include "raul/TimeStamp.hpp" 00025 00026 namespace Raul { 00027 00028 00034 class EventRingBuffer : private Raul::RingBuffer<uint8_t> { 00035 public: 00036 00039 EventRingBuffer(size_t capacity) 00040 : RingBuffer<uint8_t>(capacity) 00041 {} 00042 00043 size_t capacity() const { return _size; } 00044 00045 size_t write(TimeStamp time, size_t size, const uint8_t* buf); 00046 bool read(TimeStamp* time, size_t* size, uint8_t* buf); 00047 }; 00048 00049 00050 inline bool 00051 EventRingBuffer::read(TimeStamp* time, size_t* size, uint8_t* buf) 00052 { 00053 bool success = RingBuffer<uint8_t>::full_read(sizeof(TimeStamp), (uint8_t*)time); 00054 if (success) 00055 success = RingBuffer<uint8_t>::full_read(sizeof(size_t), (uint8_t*)size); 00056 if (success) 00057 success = RingBuffer<uint8_t>::full_read(*size, buf); 00058 00059 return success; 00060 } 00061 00062 00063 inline size_t 00064 EventRingBuffer::write(TimeStamp time, size_t size, const uint8_t* buf) 00065 { 00066 assert(size > 0); 00067 00068 if (write_space() < (sizeof(TimeStamp) + sizeof(size_t) + size)) { 00069 return 0; 00070 } else { 00071 RingBuffer<uint8_t>::write(sizeof(TimeStamp), (uint8_t*)&time); 00072 RingBuffer<uint8_t>::write(sizeof(size_t), (uint8_t*)&size); 00073 RingBuffer<uint8_t>::write(size, buf); 00074 return size; 00075 } 00076 } 00077 00078 00079 } // namespace Raul 00080 00081 #endif // RAUL_EVENT_RING_BUFFER_HPP 00082