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How can one know if a pthread died?
Is there a way to check a pthreads status?
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The pthread_create() function will fail if: [EAGAIN] The system lacked the necessary resources to create another thread, or the system-imposed limit on the total number of threads in a process PTHREAD_THREADS_MAX would be exceeded.
After a successful call to pthread_join(), the caller is guaranteed that the target thread has terminated. Joining with a thread that has previously been joined results in undefined behavior. Failure to join with a thread that is joinable (i.e., one that is not detached), produces a "zombie thread".
The pthread_exit() function terminates the calling thread, making its exit status available to any waiting threads. Normally, a thread terminates by returning from the start routine that was specified in the pthread_create() call which started it.
if(pthread_kill(the_thread, 0) == 0)
{
/* still running */
}
See: pthread_kill
Note: there is an inherent risk to using pthread_kill() to test if a thread is still running. See this post for an explanation: How do I determine if a pthread is alive?
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If you don't need to write a portable application and can use GNU extensions, you can use pthread_tryjoin_np. I believe there isn't another way to do it, except for setting up communication between two threads (e.g. using a global mutex which is hold by a thread as long as it is alive).
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