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)