Import BSDDB 4.7.25 (as of svn r89086)

hash/hash_meta.c

@@ -0,0 +1,99 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1999,2008 Oracle.  All rights reserved.
+ *
+ * $Id: hash_meta.c 63573 2008-05-23 21:43:21Z trent.nelson $
+ */
+
+#include "db_config.h"
+
+#include "db_int.h"
+#include "dbinc/db_page.h"
+#include "dbinc/hash.h"
+#include "dbinc/lock.h"
+#include "dbinc/mp.h"
+
+/*
+ * Acquire the meta-data page.
+ *
+ * PUBLIC: int __ham_get_meta __P((DBC *));
+ */
+int
+__ham_get_meta(dbc)
+	DBC *dbc;
+{
+	DB *dbp;
+	DB_MPOOLFILE *mpf;
+	HASH *hashp;
+	HASH_CURSOR *hcp;
+	int ret;
+
+	dbp = dbc->dbp;
+	mpf = dbp->mpf;
+	hashp = dbp->h_internal;
+	hcp = (HASH_CURSOR *)dbc->internal;
+
+	if ((ret = __db_lget(dbc, 0,
+	     hashp->meta_pgno, DB_LOCK_READ, 0, &hcp->hlock)) != 0)
+		return (ret);
+
+	if ((ret = __memp_fget(mpf, &hashp->meta_pgno,
+	    dbc->thread_info, dbc->txn, DB_MPOOL_CREATE, &hcp->hdr)) != 0)
+		(void)__LPUT(dbc, hcp->hlock);
+
+	return (ret);
+}
+
+/*
+ * Release the meta-data page.
+ *
+ * PUBLIC: int __ham_release_meta __P((DBC *));
+ */
+int
+__ham_release_meta(dbc)
+	DBC *dbc;
+{
+	DB_MPOOLFILE *mpf;
+	HASH_CURSOR *hcp;
+	int ret;
+
+	mpf = dbc->dbp->mpf;
+	hcp = (HASH_CURSOR *)dbc->internal;
+
+	if (hcp->hdr != NULL) {
+		if ((ret = __memp_fput(mpf,
+		    dbc->thread_info, hcp->hdr, dbc->priority)) != 0)
+			return (ret);
+		hcp->hdr = NULL;
+	}
+
+	return (__TLPUT(dbc, hcp->hlock));
+}
+
+/*
+ * Mark the meta-data page dirty.
+ *
+ * PUBLIC: int __ham_dirty_meta __P((DBC *, u_int32_t));
+ */
+int
+__ham_dirty_meta(dbc, flags)
+	DBC *dbc;
+	u_int32_t flags;
+{
+	DB *dbp;
+	HASH *hashp;
+	HASH_CURSOR *hcp;
+	int ret;
+
+	dbp = dbc->dbp;
+	hashp = dbp->h_internal;
+	hcp = (HASH_CURSOR *)dbc->internal;
+
+	if ((ret = __db_lget(dbc, LCK_COUPLE,
+	     hashp->meta_pgno, DB_LOCK_WRITE, 0, &hcp->hlock)) != 0)
+		return (ret);
+
+	return (__memp_dirty(dbp->mpf,
+	    &hcp->hdr, dbc->thread_info, dbc->txn, dbc->priority, flags));
+}