nptl/sysdeps/unix/sysv/linux/pt-raise.c

   1 /* Copyright (C) 2002-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <signal.h>
  21 #include <sysdep.h>
  22 #include <tls.h>
  23 #include <kernel-features.h>
  24
  25
  26 int
  27 raise (sig)
  28      int sig;
  29 {
  30   /* raise is an async-safe function.  It could be called while the
  31      fork function temporarily invalidated the PID field.  Adjust for
  32      that.  */
  33   pid_t pid = THREAD_GETMEM (THREAD_SELF, pid);
  34   if (__builtin_expect (pid < 0, 0))
  35     pid = -pid;
  36
  37   return INLINE_SYSCALL (tgkill, 3, pid, THREAD_GETMEM (THREAD_SELF, tid),
  38                          sig);
  39 }