lib/libthread_xu/thread/thr_kill.c

   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  */
  30
  31 #include "namespace.h"
  32 #include <machine/tls.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 int
  41 _pthread_kill(pthread_t pthread, int sig)
  42 {
  43         pthread_t curthread;
  44         int ret;
  45
  46         /* Check for invalid signal numbers: */
  47         if (sig < 0 || sig > _SIG_MAXSIG)
  48                 /* Invalid signal: */
  49                 return (EINVAL);
  50
  51         curthread = tls_get_curthread();
  52
  53         /*
  54          * Ensure the thread is in the list of active threads, and the
  55          * signal is valid (signal 0 specifies error checking only) and
  56          * not being ignored:
  57          */
  58         if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
  59             == 0) {
  60                 if (sig > 0)
  61                         _thr_send_sig(pthread, sig);
  62                 _thr_ref_delete(curthread, pthread);
  63         }
  64
  65         /* Return the completion status: */
  66         return (ret);
  67 }
  68
  69 __strong_reference(_pthread_kill, pthread_kill);