NAME¶
gettid - get thread identification
SYNOPSIS¶
#include <sys/types.h>
pid_t gettid(void);
Note: There is no glibc wrapper for this system call; see NOTES.
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.
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¶
capget(2),
clone(2),
fcntl(2),
fork(2),
get_robust_list(2),
getpid(2),
ioprio_set(2),
perf_event_open(2),
sched_setaffinity(2),
sched_setparam(2),
sched_setscheduler(2),
tgkill(2),
timer_create(2)
COLOPHON¶
This page is part of release 3.74 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
http://www.kernel.org/doc/man-pages/.
