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GETTID(2)		   Linux Programmer's Manual		     GETTID(2)

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.

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
       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_set-
       param(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/.

Linux				  2014-02-11			     GETTID(2)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

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