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.
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 static inline __attribute__((always_inline
)) pid_t
really_getpid (pid_t oldval
);
27 static inline __attribute__((always_inline
)) pid_t
28 really_getpid (pid_t oldval
)
30 if (__glibc_likely (oldval
== 0))
32 pid_t selftid
= THREAD_GETMEM (THREAD_SELF
, tid
);
33 if (__glibc_likely (selftid
!= 0))
37 INTERNAL_SYSCALL_DECL (err
);
38 pid_t result
= INTERNAL_SYSCALL (getpid
, err
, 0);
40 /* We do not set the PID field in the TID here since we might be
41 called from a signal handler while the thread executes fork. */
43 THREAD_SETMEM (THREAD_SELF
, tid
, result
);
52 INTERNAL_SYSCALL_DECL (err
);
53 pid_t result
= INTERNAL_SYSCALL (getpid
, err
, 0);
55 pid_t result
= THREAD_GETMEM (THREAD_SELF
, pid
);
56 if (__glibc_unlikely (result
<= 0))
57 result
= really_getpid (result
);
62 libc_hidden_def (__getpid
)
63 weak_alias (__getpid
, getpid
)
64 libc_hidden_def (getpid
)