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NAME

       gettid - get thread identification

SYNOPSIS

       #include <sys/types.h>
       #include <linux/unistd.h>
       #include <errno.h>

       _syscall0(pid_t,gettid)

       pid_t gettid(void);

DESCRIPTION

       gettid() returns the thread ID of the current process. This is equal to
       the process ID (as returned by getpid(2)), unless the process  is  part
       of  a  thread group (created by specifying the CLONE_THREAD flag to the
       clone(2) system call). All processes in the same thread group have  the
       same PID, but each one has a unique TID.

RETURN VALUE

       On success, returns the thread ID of the current process.

ERRORS

       This call is always successful.

CONFORMING TO

       gettid()  is Linux specific and should not be used in programs that are
       intended to be portable.

SEE ALSO

       clone(2), fork(2), getpid(2)