thr_join man page on SmartOS

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THR_JOIN(3C)							  THR_JOIN(3C)

       thr_join - wait for thread termination

       cc -mt [ flag... ] file...[ library... ]
       #include <thread.h>

       int thr_join(thread_t thread, thread_t *departed, void **status);

       The thr_join() function suspends processing of the calling thread until
       the target thread completes. The thread argument must be	 a  member  of
       the  current  process  and  cannot  be  a detached thread. See thr_cre‐

       If two or more threads wait for the same thread to complete,  all  will
       suspend processing until the thread has terminated, and then one thread
       will return successfully and the others will return with	 an  error  of
       ESRCH. The thr_join() function will not block processing of the calling
       thread if the target thread has already terminated.

       If a thr_join() call returns successfully with a non-null status	 argu‐
       ment,  the  value passed to thr_exit(3C) by the terminating thread will
       be placed in the location referenced by status.

       If the target thread ID is  0, thr_join() finds and returns the	status
       of  a  terminated  undetached  thread in the process. If no such thread
       exists, it suspends processing of the calling thread until a thread for
       which  no  other	 thread is waiting enters that state, at which time it
       returns successfully, or until all other threads	 in  the  process  are
       either  daemon  threads or threads waiting in thr_join(), in which case
       it returns EDEADLK. See NOTES.

       If departed is not NULL, it points to a location that is set to the  ID
       of the terminated thread if thr_join() returns successfully.

       If  successful,	thr_join()  returns  0.	 Otherwise, an error number is
       returned to indicate the error.

		   A joining deadlock would  occur,  such  as  when  a	thread
		   attempts to wait for itself, or the calling thread is wait‐
		   ing for any thread to exit and only daemon threads or wait‐
		   ing threads exist in the process.

		   No  undetached  thread  could be found corresponding to the
		   given thread ID.

       See attributes(5) for descriptions of the following attributes:

       │MT-Level       │ MT-Safe	 │

       thr_create(3C), thr_exit(3C), wait(3C), attributes(5), standards(5)

       Using thr_join(3C) in the following syntax,

	 while (thr_join(0, NULL, NULL) == 0);

       will wait for the termination  of  all  non-daemon  threads,  excluding
       threads that are themselves waiting in thr_join().

				 Mar 27, 2000			  THR_JOIN(3C)

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