nptl/sysdeps/unix/sysv/linux/getpid.c

   1 /* Copyright (C) 2003-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   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 <unistd.h>
  20 #include <tls.h>
  21 #include <sysdep.h>
  22
  23
  24 pid_t
  25 __getpid (void)
  26 {
  27 #ifndef NOT_IN_libc
  28   pid_t result = THREAD_GETMEM (THREAD_SELF, pid);
  29   if (__glibc_likely (result > 0))
  30     return result;
  31 #endif
  32
  33   INTERNAL_SYSCALL_DECL (err);
  34   return INTERNAL_SYSCALL (getpid, err, 0);
  35 }
  36
  37 libc_hidden_def (__getpid)
  38 weak_alias (__getpid, getpid)
  39 libc_hidden_def (getpid)