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GETTID
Section: Linux Programmer's Manual (2)
Updated: 2008-04-14
Index
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NAME
gettid - get thread identification
SYNOPSIS
#include <sys/types.h>
pid_t gettid(void);
DESCRIPTION
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 discussion of
CLONE_THREAD
in
clone(2).
RETURN VALUE
On success, returns the thread ID of the calling process.
ERRORS
This call is always successful.
VERSIONS
The
gettid()
system call first appeared on Linux in kernel 2.4.11.
CONFORMING TO
gettid()
is Linux-specific and should not be used in programs that
are intended to be portable.
NOTES
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)).
SEE ALSO
clone(2),
fork(2),
getpid(2)
COLOPHON
This page is part of release 3.27 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-
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