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pthread_join(3)

NAME

     pthread_join -- wait for thread termination

LIBRARY

     Reentrant C Library (libc_r, -lc_r)
     POSIX Threads Library (libpthread, -lpthread)
     1:1 Threading Library (libthr, -lthr)

SYNOPSIS

     #include <pthread.h>

     int
     pthread_join(pthread_t thread, void **value_ptr);

DESCRIPTION

     The pthread_join() function suspends execution of the calling thread
     until the target thread terminates unless the target thread has already
     terminated.

     On return from a successful pthread_join() call with a non-NULL value_ptr
     argument, the value passed to pthread_exit() by the terminating thread is
     stored in the location referenced by value_ptr.  When a pthread_join()
     returns successfully, the target thread has been terminated.  The results
     of multiple simultaneous calls to pthread_join() specifying the same tar-
     get thread are undefined.	If the thread calling pthread_join() is can-
     celled, then the target thread is not detached.

     A thread that has exited but remains unjoined counts against
     [_POSIX_THREAD_THREADS_MAX].

RETURN VALUES

     If successful, the pthread_join() function will return zero.  Otherwise
     an error number will be returned to indicate the error.

ERRORS

     The pthread_join() function will fail if:

     [EINVAL]		The implementation has detected that the value speci-
			fied by thread does not refer to a joinable thread.

     [ESRCH]		No thread could be found corresponding to that speci-
			fied by the given thread ID, thread.

     [EDEADLK]		A deadlock was detected or the value of thread speci-
			fies the calling thread.

SEE ALSO

     wait(2), pthread_create(3)

STANDARDS

     The pthread_join() function conforms to ISO/IEC 9945-1:1996
     (``POSIX.1'').

FreeBSD 5.4			 April 4, 1996			   FreeBSD 5.4

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