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56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 2000-2005
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* Sleepycat Software. All rights reserved.
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*
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* $Id: util_cache.c,v 12.1 2005/06/16 20:20:54 bostic Exp $
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*/
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#include "db_config.h"
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#endif
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#include "db_int.h"
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/*
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* __db_util_cache --
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* Compute if we have enough cache.
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*
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* PUBLIC: int __db_util_cache __P((DB *, u_int32_t *, int *));
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*/
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int
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__db_util_cache(dbp, cachep, resizep)
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DB *dbp;
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u_int32_t *cachep;
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int *resizep;
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{
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u_int32_t pgsize;
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int ret;
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/* Get the current page size. */
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if ((ret = dbp->get_pagesize(dbp, &pgsize)) != 0)
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return (ret);
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/*
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* The current cache size is in cachep. If it's insufficient, set the
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* the memory referenced by resizep to 1 and set cachep to the minimum
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* size needed.
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*
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* Make sure our current cache is big enough. We want at least
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* DB_MINPAGECACHE pages in the cache.
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*/
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if ((*cachep / pgsize) < DB_MINPAGECACHE) {
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*resizep = 1;
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*cachep = pgsize * DB_MINPAGECACHE;
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} else
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*resizep = 0;
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return (0);
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}
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