pthread_join(3) - NetBSD Manual Pages

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PTHREAD_JOIN(3)         NetBSD Library Functions Manual        PTHREAD_JOIN(3)


NAME

     pthread_join -- wait for thread termination


LIBRARY

     POSIX Threads Library (libpthread, -lpthread)


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

     pthread_join() shall fail if:

     [EINVAL]           The value specified 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.

     pthread_join() may fail if:

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


SEE ALSO

     wait(2), pthread_create(3)


STANDARDS

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

NetBSD 5.1                     January 30, 2003                     NetBSD 5.1