0f7d684755
Here are the diffs for libc_r to get it one step closer to P1003.1c These make most of the thread/mutex/condvar structures opaque to the user. There are three functions which have been renamed with _np suffixes because they are extensions to P1003.1c (I did them for JAVA, which needs to suspend/resume threads and also start threads suspended). I've created a new header (pthread_np.h) for the non-POSIX stuff. The egrep tags stuff in /usr/src/lib/libc_r/Makefile that I uncommented doesn't work. I think its best to delete it. I don't think libc_r needs tags anyway, 'cause most of the source is in libc which does have tags. also: Here's the first batch of man pages for the thread functions. The diff to /usr/src/lib/libc_r/Makefile removes some stuff that was inherited from /usr/src/lib/libc/Makefile that should only be done with libc. also: I should have sent this diff with the pthread(3) man page. It allows people to type make -DWANT_LIBC_R world to get libc_r built with the rest of the world. I put this in the pthread(3) man page. The default is still not to build libc_r. also: The diff attached adds a pthread(3) man page to /usr/src/share/man/man3. The idea is that without libc_r installed, this man page will give people enough info to know that they have to build libc_r.
101 lines
3.4 KiB
Groff
101 lines
3.4 KiB
Groff
.\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by John Birrell.
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.\" 4. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd April 4, 1996
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.Dt PTHREAD_JOIN 3
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.Os BSD 4
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.Sh NAME
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.Nm pthread_join
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.Nd wait for thread termination
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.Sh SYNOPSIS
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.Fd #include <pthread.h>
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.Ft int
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.Fn pthread_join "pthread_t thread" "void **value_ptr"
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.Sh DESCRIPTION
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The
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.Fn pthread_join
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function suspends execution of the calling thread until the target
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.Fa thread
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terminates unless the target
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.Fa thread
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has already terminated.
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.Pp
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On return from a successful
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.Fn pthread_join
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call with a non-NULL
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.Fa value_ptr
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argument, the value passed to
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.Fn pthread_exit
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by the terminating thread is stored in the location referenced by
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.Fa value_ptr .
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When a
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.Fn pthread_join
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returns successfully, the target thread has been terminated. The results
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of multiple simultaneous calls to
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.Fn pthread_join
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specifying the same target thread are undefined. If the thread calling
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.Fn pthread_join
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is cancelled, then the target thread is not detached.
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.Pp
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A thread that has exited but remains unjoined counts against
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[_POSIX_THREAD_THREADS_MAX].
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.Pp
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.Sh RETURN VALUES
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If successful, the
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.Fn pthread_join
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function will return zero. Otherwise an error number will be returned to
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indicate the error.
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.Sh ERRORS
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.Fn pthread_join
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The implementation has detected that the value specified by
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.Fa thread
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does not refer to a joinable thread.
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.It Bq Er ESRCH
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No thread could be found corresponding to that specified by the given
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thread ID,
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.Fa thread .
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.It Bq Er EDEADLK
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A deadlock was detected or the value of
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.Fa thread
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specifies the calling thread.
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.El
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.Pp
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.Sh SEE ALSO
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.Xr pthread_create 3 ,
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.Xr wait 2
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.Sh STANDARDS
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.Fn pthread_join
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is expected to conform to IEEE
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.Pq Dq Tn POSIX
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Std 1003.1c when it is published.
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