65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file circBuffer.h
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* @author drose
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* @date 1999-02-08
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*/
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#ifndef CIRCBUFFER_H
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#define CIRCBUFFER_H
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#include "pandabase.h"
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/**
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* This class implements a queue of some type via a circular buffer. The
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* circular buffer has the advantage that no synchronization is required when
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* one process adds to the queue while another process extracts. It works for
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* any kind of Thing that has a valid assignment operator and copy constructor
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* defined.
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*/
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template<class Thing, int max_size>
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class CircBuffer {
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public:
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INLINE CircBuffer();
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INLINE ~CircBuffer();
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// Methods that are safe to call without synchronization primitives from
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// either thread.
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INLINE int size() const;
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// Methods that are safe to call without synchronization primitives only
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// from the reader thread.
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INLINE bool empty() const;
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INLINE const Thing &front() const;
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INLINE Thing &front();
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INLINE void pop_front();
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INLINE const Thing &operator[] (int n) const;
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INLINE Thing &operator[] (int n);
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// Methods that are safe to call without synchronization primitives only
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// from the writer thread.
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INLINE bool full() const;
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INLINE const Thing &back() const;
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INLINE Thing &back();
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INLINE void push_back(const Thing &t);
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INLINE void clear();
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private:
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Thing _array[max_size+1];
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int _in, _out;
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};
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#include "circBuffer.I"
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#endif
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