90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Steve Raasch
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* Nathan Binkert
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*/
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#ifndef __FIFO_BUFFER_HH__
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#define __FIFO_BUFFER_HH__
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#include "base/res_list.hh"
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//
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// The FifoBuffer requires only that the objects to be used have a default
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// constructor and a dump() method
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//
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template<class T>
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class FifoBuffer
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{
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public:
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typedef typename res_list<T>::iterator iterator;
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private:
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res_list<T> *buffer;
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unsigned size;
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public:
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FifoBuffer(unsigned sz)
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{
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buffer = new res_list<T>(sz, true, 0);
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size = sz;
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}
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void add(T &item)
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{
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assert(buffer->num_free() > 0);
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buffer->add_head(item);
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}
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iterator head() { return buffer->head(); }
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iterator tail() { return buffer->tail(); }
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unsigned count() {return buffer->count();}
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unsigned free_slots() {return buffer->num_free();}
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T *peek() { return (count() > 0) ? tail().data_ptr() : 0; }
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T remove()
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{
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assert(buffer->count() > 0);
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T rval = *buffer->tail();
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buffer->remove_tail();
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return rval;
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}
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void dump();
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~FifoBuffer() { delete buffer; }
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};
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#endif
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