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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);

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 3.22 of the Linux man-pages project.  A description of the project,  and  informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                             2008-04-14                         GETTID(2)