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System Calls - Manual Reference Pages  - GETTID (2)

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gettid - get thread identification

CONTENTS

Synopsis
Description
Errors

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#include <sys/types.h> 

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#include <linux/unistd.h> 

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#include <errno.h> 



_syscall0(pid_t, gettid) 
        /* Using syscall(2) may be preferable; see intro(2) */

pid_t gettid(void);

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.

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

This call is always successful.

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

clone(2), fork(2), getpid(2) or go to Top of page |  Section 2 |  Main Man Index.