worklist.c revision 1.1 
1/*	$OpenBSD: worklist.c,v 1.1 2006/04/26 02:55:13 joris Exp $	*/
2/*
3 * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. The name of the author may not be used to endorse or promote products
13 *    derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
16 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
17 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
18 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "includes.h"
28
29#include "worklist.h"
30#include "xmalloc.h"
31
32/*
33 * adds a path to a worklist.
34 */
35void
36rcs_worklist_add(const char *path, struct rcs_wklhead *worklist)
37{
38	size_t len;
39	struct rcs_worklist *wkl;
40	sigset_t old, new;
41
42	wkl = xcalloc(1, sizeof(*wkl));
43
44	len = strlcpy(wkl->wkl_path, path, sizeof(wkl->wkl_path));
45	if (len >= sizeof(wkl->wkl_path))
46		errx(1, "path truncation in rcs_worklist_add");
47
48	sigfillset(&new);
49	sigprocmask(SIG_BLOCK, &new, &old);
50	SLIST_INSERT_HEAD(worklist, wkl, wkl_list);
51	sigprocmask(SIG_SETMASK, &old, NULL);
52}
53
54/*
55 * run over the given worklist, calling cb for each element.
56 * this is just like rcs_worklist_clean(), except we block signals first.
57 */
58void
59rcs_worklist_run(struct rcs_wklhead *list, void (*cb)(struct rcs_worklist *))
60{
61	sigset_t old, new;
62	struct rcs_worklist *wkl;
63
64	sigfillset(&new);
65	sigprocmask(SIG_BLOCK, &new, &old);
66
67	rcs_worklist_clean(list, cb);
68
69	while ((wkl = SLIST_FIRST(list)) != NULL) {
70		SLIST_REMOVE_HEAD(list, wkl_list);
71		xfree(wkl);
72	}
73
74	sigprocmask(SIG_SETMASK, &old, NULL);
75}
76
77/*
78 * pass elements to the specified callback, which has to be signal safe.
79 */
80void
81rcs_worklist_clean(struct rcs_wklhead *list, void (*cb)(struct rcs_worklist *))
82{
83	struct rcs_worklist *wkl;
84
85	SLIST_FOREACH(wkl, list, wkl_list)
86	    cb(wkl);
87}
88
89void
90rcs_worklist_unlink(struct rcs_worklist *wkl)
91{
92	(void)unlink(wkl->wkl_path);
93}
94