98 lines
3.9 KiB
C++
98 lines
3.9 KiB
C++
/*
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Copyright (c) 2013 Khaled Mammou - Advanced Micro Devices, Inc.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#pragma once
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#ifndef O3DGC_FIFO_H
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#define O3DGC_FIFO_H
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#include "o3dgcCommon.h"
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namespace o3dgc
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{
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//!
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template < typename T > class FIFO
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{
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public:
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//! Constructor.
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FIFO()
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{
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m_buffer = 0;
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m_allocated = 0;
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m_size = 0;
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m_start = 0;
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m_end = 0;
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};
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//! Destructor.
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~FIFO(void)
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{
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delete [] m_buffer;
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};
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O3DGCErrorCode Allocate(unsigned long size)
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{
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assert(size > 0);
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if (size > m_allocated)
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{
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delete [] m_buffer;
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m_allocated = size;
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m_buffer = new T [m_allocated];
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}
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Clear();
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return O3DGC_OK;
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}
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const T & PopFirst()
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{
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assert(m_size > 0);
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--m_size;
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unsigned long current = m_start++;
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if (m_start == m_allocated)
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{
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m_end = 0;
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}
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return m_buffer[current];
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};
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void PushBack(const T & value)
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{
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assert( m_size < m_allocated);
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m_buffer[m_end] = value;
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++m_size;
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++m_end;
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if (m_end == m_allocated)
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{
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m_end = 0;
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}
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}
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const unsigned long GetSize() const { return m_size;};
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const unsigned long GetAllocatedSize() const { return m_allocated;};
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void Clear() { m_start = m_end = m_size = 0;};
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private:
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T * m_buffer;
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unsigned long m_allocated;
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unsigned long m_size;
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unsigned long m_start;
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unsigned long m_end;
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};
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}
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#endif // O3DGC_FIFO_H
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