GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/db/btree/bt_close.c Lines: 0 47 0.0 %
Date: 2017-11-13 Branches: 0 28 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: bt_close.c,v 1.10 2015/01/16 16:48:51 deraadt Exp $	*/
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/*-
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 * Copyright (c) 1990, 1993, 1994
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * This code is derived from software contributed to Berkeley by
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 * Mike Olson.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <db.h>
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#include "btree.h"
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static int bt_meta(BTREE *);
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/*
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 * BT_CLOSE -- Close a btree.
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 *
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 * Parameters:
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 *	dbp:	pointer to access method
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 *
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 * Returns:
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 *	RET_ERROR, RET_SUCCESS
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 */
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int
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__bt_close(DB *dbp)
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{
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	BTREE *t;
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	int fd;
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	t = dbp->internal;
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	/* Toss any page pinned across calls. */
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	if (t->bt_pinned != NULL) {
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		mpool_put(t->bt_mp, t->bt_pinned, 0);
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		t->bt_pinned = NULL;
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	}
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	/* Sync the tree. */
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	if (__bt_sync(dbp, 0) == RET_ERROR)
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		return (RET_ERROR);
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	/* Close the memory pool. */
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	if (mpool_close(t->bt_mp) == RET_ERROR)
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		return (RET_ERROR);
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	/* Free random memory. */
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	if (t->bt_cursor.key.data != NULL) {
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		free(t->bt_cursor.key.data);
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		t->bt_cursor.key.size = 0;
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		t->bt_cursor.key.data = NULL;
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	}
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	if (t->bt_rkey.data) {
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		free(t->bt_rkey.data);
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		t->bt_rkey.size = 0;
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		t->bt_rkey.data = NULL;
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	}
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	if (t->bt_rdata.data) {
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		free(t->bt_rdata.data);
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		t->bt_rdata.size = 0;
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		t->bt_rdata.data = NULL;
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	}
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	fd = t->bt_fd;
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	free(t);
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	free(dbp);
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	return (close(fd) ? RET_ERROR : RET_SUCCESS);
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}
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/*
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 * BT_SYNC -- sync the btree to disk.
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 *
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 * Parameters:
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 *	dbp:	pointer to access method
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 *
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 * Returns:
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 *	RET_SUCCESS, RET_ERROR.
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 */
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int
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__bt_sync(dbp, flags)
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	const DB *dbp;
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	u_int flags;
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{
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	BTREE *t;
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	int status;
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	t = dbp->internal;
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	/* Toss any page pinned across calls. */
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	if (t->bt_pinned != NULL) {
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		mpool_put(t->bt_mp, t->bt_pinned, 0);
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		t->bt_pinned = NULL;
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	}
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	/* Sync doesn't currently take any flags. */
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	if (flags != 0) {
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		errno = EINVAL;
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		return (RET_ERROR);
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	}
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	if (F_ISSET(t, B_INMEM | B_RDONLY) || !F_ISSET(t, B_MODIFIED))
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		return (RET_SUCCESS);
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	if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR)
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		return (RET_ERROR);
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	if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS)
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		F_CLR(t, B_MODIFIED);
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	return (status);
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}
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/*
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 * BT_META -- write the tree meta data to disk.
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 *
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 * Parameters:
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 *	t:	tree
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 *
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 * Returns:
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 *	RET_ERROR, RET_SUCCESS
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 */
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static int
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bt_meta(t)
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	BTREE *t;
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{
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	BTMETA m;
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	void *p;
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	if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL)
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		return (RET_ERROR);
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	/* Fill in metadata. */
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	m.magic = BTREEMAGIC;
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	m.version = BTREEVERSION;
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	m.psize = t->bt_psize;
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	m.free = t->bt_free;
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	m.nrecs = t->bt_nrecs;
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	m.flags = F_ISSET(t, SAVEMETA);
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	memmove(p, &m, sizeof(BTMETA));
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	mpool_put(t->bt_mp, p, MPOOL_DIRTY);
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	return (RET_SUCCESS);
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}