Initial revision

buddy/src/cache.c

@@ -0,0 +1,97 @@
+/*========================================================================
+               Copyright (C) 1996-2002 by Jorn Lind-Nielsen
+                            All rights reserved
+
+    Permission is hereby granted, without written agreement and without
+    license or royalty fees, to use, reproduce, prepare derivative
+    works, distribute, and display this software and its documentation
+    for any purpose, provided that (1) the above copyright notice and
+    the following two paragraphs appear in all copies of the source code
+    and (2) redistributions, including without limitation binaries,
+    reproduce these notices in the supporting documentation. Substantial
+    modifications to this software may be copyrighted by their authors
+    and need not follow the licensing terms described here, provided
+    that the new terms are clearly indicated in all files where they apply.
+
+    IN NO EVENT SHALL JORN LIND-NIELSEN, OR DISTRIBUTORS OF THIS
+    SOFTWARE BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL,
+    INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS
+    SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE AUTHORS OR ANY OF THE
+    ABOVE PARTIES HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+    JORN LIND-NIELSEN SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
+    BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+    FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+    ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO
+    OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
+    MODIFICATIONS.
+========================================================================*/
+
+/*************************************************************************
+  $Header: /Volumes/CVS/repository/spot/spot/buddy/src/cache.c,v 1.1 2003/05/05 10:57:56 aduret Exp $
+  FILE:  cache.c
+  DESCR: Cache class for caching apply/exist etc. results in BDD package
+  AUTH:  Jorn Lind
+  DATE:  (C) june 1997
+*************************************************************************/
+#include <stdlib.h>
+#include "kernel.h"
+#include "cache.h"
+#include "prime.h"
+
+/*************************************************************************
+*************************************************************************/
+
+int BddCache_init(BddCache *cache, int size)
+{
+   int n;
+
+   size = bdd_prime_gte(size);
+   
+   if ((cache->table=NEW(BddCacheData,size)) == NULL)
+      return bdd_error(BDD_MEMORY);
+   
+   for (n=0 ; n<size ; n++)
+      cache->table[n].a = -1;
+   cache->tablesize = size;
+   
+   return 0;
+}
+
+
+void BddCache_done(BddCache *cache)
+{
+   free(cache->table);
+   cache->table = NULL;
+   cache->tablesize = 0;
+}
+
+
+int BddCache_resize(BddCache *cache, int newsize)
+{
+   int n;
+
+   free(cache->table);
+
+   newsize = bdd_prime_gte(newsize);
+   
+   if ((cache->table=NEW(BddCacheData,newsize)) == NULL)
+      return bdd_error(BDD_MEMORY);
+   
+   for (n=0 ; n<newsize ; n++)
+      cache->table[n].a = -1;
+   cache->tablesize = newsize;
+   
+   return 0;
+}
+
+
+void BddCache_reset(BddCache *cache)
+{
+   register int n;
+   for (n=0 ; n<cache->tablesize ; n++)
+      cache->table[n].a = -1;
+}
+
+
+/* EOF */