sysdeps/unix/sysv/linux/exit-thread.h

   1 /* Call to terminate the current thread.  Linux version.
   2    Copyright (C) 2014-2015 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20
  21 /* This causes the current thread to exit, without affecting other
  22    threads in the process if there are any.  If there are no other
  23    threads left, then this has the effect of _exit (0).  */
  24
  25 static inline void __attribute__ ((noreturn, always_inline, unused))
  26 __exit_thread (void)
  27 {
  28   /* Doing this in a loop is mostly just to satisfy the compiler that the
  29      function really qualifies as noreturn.  It also means that in some
  30      pathological situation where the system call does not get made or does
  31      not work, the thread will simply spin rather than running off the end
  32      of the caller and doing unexpectedly strange things.  */
  33   while (1)
  34     {
  35       INTERNAL_SYSCALL_DECL (err);
  36       INTERNAL_SYSCALL (exit, err, 1, 0);
  37     }
  38 }