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106 lines
2.0 KiB
106 lines
2.0 KiB
/*
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* Copyright (C) 2006-2009,2013,2015 by Jonathan Naylor G4KLX
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* Copyright (C) 2021 by Geoffrey Merck F4FXL / KC3FRA
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef RingBuffer_H
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#define RingBuffer_H
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#include <cassert>
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#include <cstring>
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#include <mutex>
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template<class T> class CRingBuffer {
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public:
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CRingBuffer(unsigned int length) :
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m_length(length),
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m_buffer(NULL),
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m_iPtr(0U),
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m_oPtr(0U),
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m_mutex()
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{
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assert(length > 0U);
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m_buffer = new T[length];
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}
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~CRingBuffer()
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{
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delete[] m_buffer;
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}
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void addData(const T data)
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{
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std::lock_guard locker(m_mutex);
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m_buffer[m_iPtr++] = data;
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if (m_iPtr == m_length)
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m_iPtr = 0U;
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}
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T getData()
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{
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std::lock_guard locker(m_mutex);
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if (m_iPtr == m_oPtr)
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return NULL;
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T data = m_buffer[m_oPtr++];
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if (m_oPtr == m_length)
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m_oPtr = 0U;
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return data;
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}
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void clear()
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{
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std::lock_guard locker(m_mutex);
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m_iPtr = 0U;
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m_oPtr = 0U;
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::memset(m_buffer, 0x00, m_length * sizeof(T));
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}
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bool empty()
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{
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std::lock_guard locker(m_mutex);
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return m_iPtr == m_oPtr;
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}
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T peek()
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{
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std::lock_guard locker(m_mutex);
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if (m_iPtr == m_oPtr)
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return NULL;
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return m_buffer[m_oPtr];
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}
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private:
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unsigned int m_length;
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T* m_buffer;
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volatile unsigned int m_iPtr;
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volatile unsigned int m_oPtr;
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std::recursive_mutex m_mutex;
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};
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#endif |