1GETTID(2)                  Linux Programmer's Manual                 GETTID(2)
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NAME

6       gettid - get thread identification
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SYNOPSIS

9       #include <sys/types.h>
10       #include <linux/unistd.h>
11       #include <errno.h>
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13       _syscall0(pid_t, gettid)
14               /* Using syscall(2) may be preferable; see intro(2) */
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16       pid_t gettid(void);
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DESCRIPTION

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

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

29       This call is always successful.
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CONFORMING TO

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

36       clone(2), fork(2), getpid(2)
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40Linux 2.4.20                      2003-02-01                         GETTID(2)