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



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 3.25 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/.



Linux                                                      2008-04-14                                                  GETTID(2)