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bb8a420424
Add a note about not touching errno and warn about previous drafts of the standard which changed the level of indirection to the thread argument. POSIX had a bit of trouble deciding what to do. So anyone coding to both draft 4 and draft 10 (the final draft) will get burnt by this function. I did. Grrr.
82 lines
3.0 KiB
Groff
82 lines
3.0 KiB
Groff
.\" Copyright (c) 1996-1998 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_DETACH 3
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.Os BSD 4
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.Sh NAME
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.Nm pthread_detach
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.Nd detach a thread
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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_detach "pthread_t thread"
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.Sh DESCRIPTION
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The
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.Fn pthread_detach
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function is used to indicate to the implementation that storage for the
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thread
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.Fa thread
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can be reclaimed when the thread terminates. If
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.Fa thread
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has not terminated,
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.Fn pthread_detach
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will not cause it to terminate. The effect of multiple
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.Fn pthread_detach
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calls on the same target thread is unspecified.
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.Sh RETURN VALUES
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If successful, the
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.Fn pthread_detach
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function will return zero. Otherwise an error number will be returned to
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indicate the error. Note that the function does not change the value
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of errno as it did for some drafts of the standard. These early drafts
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also passed a pointer to pthread_t as the argument. Beware!
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.Sh ERRORS
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.Fn pthread_detach
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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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.El
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.Pp
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.Sh SEE ALSO
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.Xr pthread_join 3
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.Sh STANDARDS
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.Fn pthread_detach
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conforms to ISO/IEC 9945-1 ANSI/IEEE
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.Pq Dq Tn POSIX
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Std 1003.1 Second Edition 1996-07-12
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