1 files changed, 85 insertions, 0 deletions
diff --git a/src/backend/utils/catcache.h b/src/backend/utils/catcache.h
new file mode 100644
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+++ b/src/backend/utils/catcache.h
@@ -0,0 +1,85 @@
+/*-------------------------------------------------------------------------
+ *
+ * catcache.h--
+ *    Low-level catalog cache definitions.
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: catcache.h,v 1.1.1.1 1996/07/09 06:22:01 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef	CATCACHE_H
+#define CATCACHE_H
+
+/* #define	CACHEDEBUG 	 turns DEBUG elogs on */
+
+#include "postgres.h"
+    
+#include "access/skey.h"
+#include "access/htup.h"
+#include "utils/rel.h"
+#include "nodes/memnodes.h"
+#include "lib/dllist.h"
+
+/*
+ *	struct catctup:		tuples in the cache.
+ *	struct catcache:	information for managing a cache.
+ */
+
+typedef struct catctup {
+    HeapTuple	ct_tup;		/* A pointer to a tuple		*/
+    Dlelem     *ct_node; /* points to LRU list is the CatCTup is in the cache,
+			    else, points to the cache if the CatCTup is in 
+			    LRU list */
+} CatCTup;
+
+/* voodoo constants */
+#define	NCCBUCK	500	/* CatCache buckets*/
+#define MAXTUP 300	/* Maximum # of tuples cached per cache */
+
+typedef struct catcache {
+    Oid		relationId;
+    Oid		indexId;
+    char	*cc_relname; 	/* relation name for defered open */
+    char	*cc_indname; 	/* index name for defered open */
+    HeapTuple	(*cc_iscanfunc)(); /* index scanfunction */
+    TupleDesc 	cc_tupdesc;	/* tuple descriptor from reldesc */
+    int		id;		/* XXX could be improved -hirohama */
+    short	cc_ntup; 	/* # of tuples in this cache	*/
+    short	cc_maxtup; 	/* max # of tuples allowed (LRU)*/
+    short	cc_nkeys;
+    short	cc_size;
+    short	cc_key[4];
+    short	cc_klen[4];
+    ScanKeyData	cc_skey[4];
+    struct catcache *cc_next;
+    Dllist  *cc_lrulist;          /* LRU list, most recent first */
+    Dllist  *cc_cache[NCCBUCK+1];
+} CatCache;
+
+#define	InvalidCatalogCacheId	(-1)
+
+extern struct catcache	*Caches;
+extern GlobalMemory	CacheCxt;
+
+extern void CatalogCacheInitializeCache(struct catcache *cache, 
+					Relation relation);
+extern void CatalogCacheSetId(CatCache *cacheInOutP, int id);
+extern long comphash(long l, char *v);
+extern Index CatalogCacheComputeHashIndex(struct catcache *cacheInP);
+extern Index CatalogCacheComputeTupleHashIndex(struct catcache *cacheInOutP,
+				       Relation relation, HeapTuple tuple);
+extern void CatCacheRemoveCTup(CatCache *cache, Dlelem *e);  
+extern void CatalogCacheIdInvalidate(int cacheId, Index hashIndex, 
+				     ItemPointer pointer);
+extern void ResetSystemCache(void);
+extern CatCache *InitSysCache(char *relname, char *indname, int id, int nkeys, 
+			      int key[], HeapTuple (*iScanfuncP)());
+extern HeapTuple SearchSysCache(struct catcache *cache, Datum v1, Datum v2,
+				Datum v3, Datum v4);
+extern void RelationInvalidateCatalogCacheTuple(Relation relation, 
+				HeapTuple tuple, void (*function)());
+
+#endif	/* CATCACHE_H */