gettid — get thread identification
|There is no glibc wrapper for this system call; see NOTES.|
gettid() returns the
caller's thread ID (TID). In a single-threaded process, the
thread ID is equal to the process ID (PID, as returned by
getpid(2)). In a
multithreaded process, all threads have the same PID, but
each one has a unique TID. For further details, see the
gettid() is Linux-specific
and should not be used in programs that are intended to be
Glibc does not provide a wrapper for this system call; call it using syscall(2).
The thread ID returned by this call is not the same thing as a POSIX thread ID (i.e., the opaque value returned by pthread_self(3)).
In a new thread group created by a clone(2) call that does not
(or, equivalently, a new process created by fork(2)), the new process
is a thread group leader, and its thread group ID (the value
returned by getpid(2)) is the same as
its thread ID (the value returned by
This page is part of release 4.07 of the Linux
man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
Copyright 2003 Abhijit Menon-Sen <amswiw.org>
and Copyright (C) 2008 Michael Kerrisk <mtk.manpagesgmail.com>
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.
Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.
Since the Linux kernel and libraries are constantly changing, this
manual page may be incorrect or out-of-date. The author(s) assume no
responsibility for errors or omissions, or for damages resulting from
the use of the information contained herein. The author(s) may not
have taken the same level of care in the production of this manual,
which is licensed free of charge, as they might when working
Formatted or processed versions of this manual, if unaccompanied by
the source, must acknowledge the copyright and authors of this work.