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Diffstat (limited to 'src/base/circlebuf.hh')
-rw-r--r-- | src/base/circlebuf.hh | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/base/circlebuf.hh b/src/base/circlebuf.hh new file mode 100644 index 000000000..66583b7db --- /dev/null +++ b/src/base/circlebuf.hh @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2002-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Nathan Binkert + */ + +#ifndef __CIRCLEBUF_HH__ +#define __CIRCLEBUF_HH__ + +#include <iosfwd> + +class CircleBuf +{ + protected: + char *_buf; + bool _rollover; + int _buflen; + int _size; + int _start; + int _stop; + + public: + explicit CircleBuf(int l); + ~CircleBuf(); + + bool empty() const { return _size == 0; } + int size() const { return _size; } + void dump(); + void flush(); + void read(char *b, int len); + void read(int fd, int len); + void read(int fd); + void read(std::ostream &out); + void readall(int fd); + void write(char b); + void write(const char *b); + void write(const char *b, int len); +}; + +#endif // __CIRCLEBUF_HH__ |