Init

cmd/backup/include/database/cache.h

@@ -0,0 +1,61 @@
+#ifndef CACHE_H
+#define	CACHE_H
+
+/*
+ * Copyright (c) 1990,1991,1992 by Sun Microsystems, Inc.
+ */
+
+/*	@(#)cache.h 1.2 91/12/20 */
+
+#include <stdio.h>
+#include <sys/types.h>
+
+struct cache_block {
+	struct cache_block *nxt, *prv;		/* for lru/free list */
+	struct cache_block *link, *rlink;	/* for hash chain */
+	caddr_t	data;				/* pointer to data */
+	u_long	flags;				/* see defines */
+	u_long	blknum;				/* blknum in file */
+};
+
+/*
+ * definitions for cache_block.flags
+ */
+#define	CACHE_ENT_VALID		0x00000001
+#define	CACHE_ENT_DIRTY		0x00000002
+
+struct block_head {
+	struct cache_block *nxt, *prv;
+	struct cache_block *link, *rlink;
+};
+
+struct cache_header {
+	struct block_head *hb;			/* pointer to hash buckets */
+	struct block_head lru;			/* lru list */
+	struct block_head freelist;		/* free list */
+	struct cache_block *blkdescrip;		/* one for each block */
+	int	cache_size;			/* # of entries in cache */
+	int	cache_blksize;			/* size of a memory block */
+};
+
+/*
+ * misc definitions
+ */
+#define	NULL_CACHE_HEADER	(struct cache_header *)0
+#define	NULL_CACHE_BLOCK	(struct cache_block *)0
+
+#ifdef __STDC__
+extern void cache_insert(struct cache_header *, struct cache_block *);
+extern void cache_dirtyblock(struct cache_header *, u_long);
+extern struct cache_header *cache_init(caddr_t,
+			int, int, struct cache_header *);
+extern struct cache_block *cache_getblock(struct cache_header *, u_long);
+extern struct cache_block *cache_alloc_block(struct cache_header *);
+#else
+extern void cache_insert();
+extern void cache_dirtyblock();
+extern struct cache_header *cache_init();
+extern struct cache_block *cache_getblock();
+extern struct cache_block *cache_alloc_block();
+#endif
+#endif