sysdeps/hurd/htl/pt-kill.c

   1 /* pthread_kill.  Hurd version.
   2    Copyright (C) 2002-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library;  if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20 #include <assert.h>
  21 #include <signal.h>
  22 #include <hurd/signal.h>
  23
  24 #include <pt-internal.h>
  25
  26 int
  27 __pthread_kill (pthread_t thread, int sig)
  28 {
  29   struct __pthread *pthread;
  30   struct hurd_signal_detail detail;
  31   struct hurd_sigstate *ss;
  32
  33   /* Lookup the thread structure for THREAD.  */
  34   pthread = __pthread_getid (thread);
  35   if (pthread == NULL)
  36     return ESRCH;
  37
  38   if (pthread->kernel_thread == MACH_PORT_DEAD)
  39     /* The pthread ID is still valid but we cannot send a signal any more.  */
  40     return 0;
  41
  42   ss = _hurd_thread_sigstate (pthread->kernel_thread);
  43   assert (ss);
  44
  45   if (sig == 0)
  46     return 0;
  47
  48   detail.exc = 0;
  49   detail.code = sig;
  50   detail.error = 0;
  51
  52   __spin_lock (&ss->lock);
  53   return _hurd_raise_signal (ss, sig, &detail);
  54 }
  55 strong_alias (__pthread_kill, pthread_kill)