.\" Copyright (c) 1996-1998 John Birrell <email@example.com>. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by John Birrell. .\" 4. Neither the name of the author nor the names of any co-contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD: src/lib/libc_r/man/pthread_join.3,v 18.104.22.168 2001/08/17 15:42:51 ru Exp $ .\" .Dd April 4, 1996 .Dt PTHREAD_JOIN 3 .Os .Sh NAME .Nm pthread_join .Nd wait for thread termination .Sh SYNOPSIS .Fd #include <pthread.h> .Ft int .Fo pthread_join .Fa "pthread_t thread" .Fa "void **value_ptr" .Fc .Sh DESCRIPTION The .Fn pthread_join function suspends execution of the calling thread until the target .Fa thread terminates, unless the target .Fa thread has already terminated. .Pp On return from a successful .Fn pthread_join call with a non-NULL .Fa value_ptr argument, the value passed to .Fn pthread_exit by the terminating thread is stored in the location referenced by .Fa value_ptr . When a .Fn pthread_join returns successfully, the target thread has been terminated. The results of multiple simultaneous calls to .Fn pthread_join , specifying the same target thread, are undefined. If the thread calling .Fn pthread_join is cancelled, the target thread is not detached. .Pp .Sh RETURN VALUES If successful, the .Fn pthread_join function will return zero. Otherwise, an error number will be returned to indicate the error. .Sh ERRORS .Fn pthread_join will fail if: .Bl -tag -width Er .It Bq Er EDEADLK A deadlock was detected or the value of .Fa thread specifies the calling thread. .It Bq Er EINVAL The implementation has detected that the value specified by .Fa thread does not refer to a joinable thread. .It Bq Er ESRCH No thread could be found corresponding to that specified by the given thread ID, .Fa thread . .El .Sh SEE ALSO .Xr wait 2 , .Xr pthread_create 3 .Sh STANDARDS .Fn pthread_join conforms to .St -p1003.1-96 .