1 /* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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.
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.
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/>. */
25 # define __NR_getpid __NR_getxpid
29 static inline __attribute__((always_inline)) pid_t really_getpid (pid_t oldval);
31 static inline __attribute__((always_inline)) pid_t
32 really_getpid (pid_t oldval)
34 if (__builtin_expect (oldval == 0, 1))
36 pid_t selftid = THREAD_GETMEM (THREAD_SELF, tid);
37 if (__builtin_expect (selftid != 0, 1))
41 INTERNAL_SYSCALL_DECL (err);
42 pid_t result = INTERNAL_SYSCALL (getpid, err, 0);
44 /* We do not set the PID field in the TID here since we might be
45 called from a signal handler while the thread executes fork. */
47 THREAD_SETMEM (THREAD_SELF, tid, result);
56 INTERNAL_SYSCALL_DECL (err);
57 pid_t result = INTERNAL_SYSCALL (getpid, err, 0);
59 pid_t result = THREAD_GETMEM (THREAD_SELF, pid);
60 if (__builtin_expect (result <= 0, 0))
61 result = really_getpid (result);
65 weak_alias(__getpid, getpid)
66 libc_hidden_weak(getpid)
67 #if !defined NOT_IN_libc && !defined __NR_getppid
68 strong_alias(getpid,getppid)