thr_kill.c revision 261636 
1/*
2 * Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/10/lib/libthr/thread/thr_kill.c 261636 2014-02-08 15:51:24Z kib $
30 */
31
32#include "namespace.h"
33#include <errno.h>
34#include <signal.h>
35#include <pthread.h>
36#include "un-namespace.h"
37
38#include "thr_private.h"
39
40__weak_reference(_pthread_kill, pthread_kill);
41
42int
43_pthread_kill(pthread_t pthread, int sig)
44{
45	struct pthread *curthread;
46	int ret;
47
48	/* Check for invalid signal numbers: */
49	if (sig < 0 || sig > _SIG_MAXSIG)
50		/* Invalid signal: */
51		return (EINVAL);
52
53	curthread = _get_curthread();
54
55	/*
56	 * Ensure the thread is in the list of active threads, and the
57	 * signal is valid (signal 0 specifies error checking only) and
58	 * not being ignored:
59	 */
60	if (curthread == pthread) {
61		if (sig > 0)
62			_thr_send_sig(pthread, sig);
63		ret = 0;
64	} else if ((ret = _thr_find_thread(curthread, pthread,
65	    /*include dead*/0)) == 0) {
66		if (sig > 0)
67			_thr_send_sig(pthread, sig);
68		THR_THREAD_UNLOCK(curthread, pthread);
69	}
70
71	/* Return the completion status: */
72	return (ret);
73}
74