sysdeps/mach/hurd/getpid.c

   1 /* Copyright (C) 1991-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <unistd.h>
  20 #include <hurd.h>
  21
  22 /* Get the process ID of the calling process.  */
  23 pid_t
  24 __getpid (void)
  25 {
  26   /* Assumes atomic word fetch and store, so doesn't lock _hurd_pid_lock.  */
  27   return _hurd_pid;
  28 }
  29 libc_hidden_def (__getpid)
  30 weak_alias (__getpid, getpid)
  31 libc_hidden_weak (getpid)