sysdeps/htl/raise.c

   1 /* raise.c - Generic raise implementation.
   2    Copyright (C) 2008-2018 Free Software Foundation, Inc.
   3    Written by Neal H. Walfield <neal@gnu.org>.
   4
   5    This file is part of the GNU Hurd.
   6
   7    The GNU Hurd is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public License
   9    as published by the Free Software Foundation; either version 3 of
  10    the License, or (at your option) any later version.
  11
  12    The GNU Hurd is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with this program.  If not, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include <pthreadP.h>
  22 #include <signal.h>
  23 #include <unistd.h>
  24
  25 #pragma weak __pthread_kill
  26 #pragma weak __pthread_self
  27 #pragma weak __pthread_threads
  28 int
  29 raise (int signo)
  30 {
  31   /* According to POSIX, if we implement threads (and we do), then
  32      "the effect of the raise() function shall be equivalent to
  33      calling: pthread_kill(pthread_self(), sig);"  */
  34
  35   if (__pthread_kill != NULL && __pthread_threads != NULL)
  36     {
  37       int err;
  38       err = __pthread_kill (__pthread_self (), signo);
  39       if (err)
  40         {
  41           errno = err;
  42           return -1;
  43         }
  44       return 0;
  45     }
  46   else
  47     return __kill (__getpid (), signo);
  48 }
  49
  50 libc_hidden_def (raise)
  51 weak_alias (raise, gsignal)