clinuxpthreads

How to get thread id of a pthread in linux c program?

In a Linux C program, how do I print the thread id of a thread created by the pthread library? For example like how we can get pid of a process by getpid().

Solution

  • pthread_self() function will give the thread id of current thread. 

    pthread_t pthread_self(void);

    The pthread_self() function returns the Pthread handle of the calling thread. The pthread_self() function does NOT return the integral thread of the calling thread. You must use pthread_getthreadid_np() to return an integral identifier for the thread.

    NOTE:

    pthread_id_np_t   tid;
tid = pthread_getthreadid_np();

    is significantly faster than these calls, but provides the same behavior.

    pthread_id_np_t   tid;
pthread_t         self;
self = pthread_self();
pthread_getunique_np(&self, &tid);