thr_kill.c revision 113658 
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. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by John Birrell.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: head/lib/libkse/thread/thr_kill.c 113658 2003-04-18 05:04:16Z deischen $
33 */
34#include <errno.h>
35#include <signal.h>
36#include <pthread.h>
37#include "thr_private.h"
38
39__weak_reference(_pthread_kill, pthread_kill);
40
41int
42_pthread_kill(pthread_t pthread, int sig)
43{
44	struct pthread *curthread = _get_curthread();
45	int ret;
46
47	/* Check for invalid signal numbers: */
48	if (sig < 0 || sig >= NSIG)
49		/* Invalid signal: */
50		ret = EINVAL;
51	/*
52	 * Ensure the thread is in the list of active threads, and the
53	 * signal is valid (signal 0 specifies error checking only) and
54	 * not being ignored:
55	 */
56	else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
57	    == 0) {
58		if ((sig > 0) &&
59		    (_thread_sigact[sig - 1].sa_handler != SIG_IGN))
60			_thr_sig_send(pthread, sig);
61		_thr_ref_delete(curthread, pthread);
62	}
63
64	/* Return the completion status: */
65	return (ret);
66}
67