37 lines
1.6 KiB
C
37 lines
1.6 KiB
C
|
/* System-specific extensions of <unistd.h>, Linux version.
|
||
|
|
Copyright (C) 2019 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, see
|
||
|
|
<http://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#ifndef _UNISTD_H
|
||
|
|
# error "Never include <bits/unistd_ext.h> directly; use <unistd.h> instead."
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_GNU
|
||
|
|
|
||
|
|
/* Return the kernel thread ID (TID) of the current thread. The
|
||
|
|
returned value is not subject to caching. Most Linux system calls
|
||
|
|
accept a TID in place of a PID. Using the TID to change properties
|
||
|
|
of a thread that has been created using pthread_create can lead to
|
||
|
|
undefined behavior (comparable to manipulating file descriptors
|
||
|
|
directly that have not been created explicitly). Note that a TID
|
||
|
|
uniquely identifies a thread only while this thread is running; a
|
||
|
|
TID can be reused once a thread has exited, even if the thread is
|
||
|
|
not detached and has not been joined. */
|
||
|
|
extern __pid_t gettid (void) __THROW;
|
||
|
|
|
||
|
|
#endif
|