Get thread identification
#include <sys/types.h> pid_t gettid(void);
Note: There is no glibc wrapper for this system call; see NOTES.
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).
On success, returns the thread ID of the calling process.
This call is always successful.
The gettid() system call first appeared on Linux in kernel 2.4.11.
gettid() is Linux-specific and should not be used in programs that are intended to be portable.
This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.