1 files changed, 115 insertions, 0 deletions
diff --git a/db/mp/mp_method.c b/db/mp/mp_method.c
new file mode 100644
index 000000000..85a6239b0
--- /dev/null
+++ b/db/mp/mp_method.c
@@ -0,0 +1,115 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1996, 1997, 1998, 1999, 2000
+ *	Sleepycat Software.  All rights reserved.
+ */
+#include "db_config.h"
+
+#ifndef lint
+static const char revid[] = "$Id: mp_method.c,v 11.10 2000/04/04 20:12:04 bostic Exp $";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+#endif
+
+#ifdef  HAVE_RPC
+#include "db_server.h"
+#endif
+
+#include "db_int.h"
+#include "db_shash.h"
+#include "mp.h"
+
+#ifdef HAVE_RPC
+#include "gen_client_ext.h"
+#include "rpc_client_ext.h"
+#endif
+
+static int __memp_set_cachesize __P((DB_ENV *, u_int32_t, u_int32_t, int));
+static int __memp_set_mp_mmapsize __P((DB_ENV *, size_t));
+
+/*
+ * __memp_dbenv_create --
+ *	Mpool specific creation of the DB_ENV structure.
+ *
+ * PUBLIC: void __memp_dbenv_create __P((DB_ENV *));
+ */
+void
+__memp_dbenv_create(dbenv)
+	DB_ENV *dbenv;
+{
+	/*
+	 * We default to 32 8K pages.  We don't default to a flat 256K, because
+	 * some systems require significantly more memory to hold 32 pages than
+	 * others.  For example, HP-UX with POSIX pthreads needs 88 bytes for
+	 * a POSIX pthread mutex and almost 200 bytes per buffer header, while
+	 * Solaris needs 24 and 52 bytes for the same structures.
+	 */
+	dbenv->mp_bytes = 32 * ((8 * 1024) + sizeof(BH));
+	dbenv->mp_ncache = 1;
+
+	dbenv->set_mp_mmapsize = __memp_set_mp_mmapsize;
+	dbenv->set_cachesize = __memp_set_cachesize;
+
+#ifdef	HAVE_RPC
+	/*
+	 * If we have a client, overwrite what we just setup to
+	 * point to client functions.
+	 */
+	if (F_ISSET(dbenv, DB_ENV_RPCCLIENT)) {
+		dbenv->set_cachesize = __dbcl_env_cachesize;
+		dbenv->set_mp_mmapsize = __dbcl_set_mp_mmapsize;
+	}
+#endif
+
+}
+
+/*
+ * __memp_set_cachesize --
+ *	Initialize the cache size.
+ */
+static int
+__memp_set_cachesize(dbenv, gbytes, bytes, ncache)
+	DB_ENV *dbenv;
+	u_int32_t gbytes, bytes;
+	int ncache;
+{
+	ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_cachesize");
+
+	dbenv->mp_gbytes = gbytes + bytes / GIGABYTE;
+	dbenv->mp_bytes = bytes % GIGABYTE;
+	dbenv->mp_ncache = ncache == 0 ? 1 : ncache;
+
+	/*
+	 * If the application requested less than 500Mb, increase the
+	 * cachesize by 25% to account for our overhead.  (I'm guessing
+	 * that caches over 500Mb are specifically sized, i.e., it's
+	 * a large server and the application actually knows how much
+	 * memory is available.)
+	 *
+	 * There is a minimum cache size, regardless.
+	 */
+	if (dbenv->mp_gbytes == 0) {
+		if (dbenv->mp_bytes < 500 * MEGABYTE)
+			dbenv->mp_bytes += dbenv->mp_bytes / 4;
+		if (dbenv->mp_bytes < DB_CACHESIZE_MIN)
+			dbenv->mp_bytes = DB_CACHESIZE_MIN;
+	}
+
+	return (0);
+}
+
+/*
+ * __memp_set_mp_mmapsize --
+ *	Set the maximum mapped file size.
+ */
+static int
+__memp_set_mp_mmapsize(dbenv, mp_mmapsize )
+	DB_ENV *dbenv;
+	size_t mp_mmapsize;
+{
+	dbenv->mp_mmapsize = mp_mmapsize;
+	return (0);
+}