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



 

NAME


       gettid - get thread identification

 

SYNOPSIS


       #include 

       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 3.05 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)