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authorSteve Reinhardt <stever@eecs.umich.edu>2006-12-02 22:22:58 -0800
committerSteve Reinhardt <stever@eecs.umich.edu>2006-12-02 22:22:58 -0800
commit6f94c3c8d755d1cdd3854fde5741305afcd44b19 (patch)
tree61fb04c9072ed39cd68eeacde3445cb1466f48b4 /src/base/compression/base.hh
parentd2a71f6b2aaad36c6420204266f006304d364ad7 (diff)
downloadgem5-6f94c3c8d755d1cdd3854fde5741305afcd44b19.tar.xz
Make cache compression policy a runtime virtual thing
instead of a template policy. --HG-- extra : convert_revision : 6a4ac7a189a950390a973fdfce94f56190de92db
Diffstat (limited to 'src/base/compression/base.hh')
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1 files changed, 71 insertions, 0 deletions
diff --git a/src/base/compression/base.hh b/src/base/compression/base.hh
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+/*
+ * Copyright (c) 2003-2005 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: Erik Hallnor
+ * Nathan Binkert
+ */
+
+#ifndef __BASE_COMPRESSION_BASE_HH__
+#define __BASE_COMPRESSION_BASE_HH__
+
+/**
+ * @file
+ * This file defines a base (abstract virtual) compression algorithm object.
+ */
+
+#include <inttypes.h>
+
+/**
+ * Abstract virtual compression algorithm object.
+ */
+class CompressionAlgorithm
+{
+ public:
+ virtual ~CompressionAlgorithm() {}
+
+ /**
+ * Uncompress the data, causes a fatal since no data should be compressed.
+ * @param dest The output buffer.
+ * @param src The compressed data.
+ * @param size The number of bytes in src.
+ *
+ * @retval The size of the uncompressed data.
+ */
+ virtual int uncompress(uint8_t * dest, uint8_t *src, int size) = 0;
+
+ /**
+ * Compress the data, just returns the source data.
+ * @param dest The output buffer.
+ * @param src The data to be compressed.
+ * @param size The number of bytes in src.
+ *
+ * @retval The size of the compressed data.
+ */
+ virtual int compress(uint8_t *dest, uint8_t *src, int size) = 0;
+};
+
+#endif //__BASE_COMPRESSION_BASE_HH__