sysdeps/htl/raise.c

   1 /* raise.c - Generic raise implementation.
   2    Copyright (C) 2008-2023 Free Software Foundation, Inc.
   3
   4    This file is part of the GNU Hurd.
   5
   6    The GNU Hurd is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public License
   8    as published by the Free Software Foundation; either version 3 of
   9    the License, or (at your option) any later version.
  10
  11    The GNU Hurd is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with this program.  If not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <ldsodefs.h>
  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
  29 #ifndef SHARED
  30 #pragma weak _dl_pthread_threads
  31 #endif
  32
  33 int
  34 raise (int signo)
  35 {
  36   /* According to POSIX, if we implement threads (and we do), then
  37      "the effect of the raise() function shall be equivalent to
  38      calling: pthread_kill(pthread_self(), sig);"  */
  39
  40   if (__pthread_kill != NULL && GL (dl_pthread_threads) != NULL)
  41     {
  42       int err;
  43       err = __pthread_kill (__pthread_self (), signo);
  44       if (err)
  45         {
  46           errno = err;
  47           return -1;
  48         }
  49       return 0;
  50     }
  51   else
  52     return __kill (__getpid (), signo);
  53 }
  54
  55 libc_hidden_def (raise)
  56 weak_alias (raise, gsignal)