10f7d6847SJulian Elischer.\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>. 20f7d6847SJulian Elischer.\" All rights reserved. 30f7d6847SJulian Elischer.\" 40f7d6847SJulian Elischer.\" Redistribution and use in source and binary forms, with or without 50f7d6847SJulian Elischer.\" modification, are permitted provided that the following conditions 60f7d6847SJulian Elischer.\" are met: 70f7d6847SJulian Elischer.\" 1. Redistributions of source code must retain the above copyright 80f7d6847SJulian Elischer.\" notice, this list of conditions and the following disclaimer. 90f7d6847SJulian Elischer.\" 2. Redistributions in binary form must reproduce the above copyright 100f7d6847SJulian Elischer.\" notice, this list of conditions and the following disclaimer in the 110f7d6847SJulian Elischer.\" documentation and/or other materials provided with the distribution. 120f7d6847SJulian Elischer.\" 3. All advertising materials mentioning features or use of this software 130f7d6847SJulian Elischer.\" must display the following acknowledgement: 140f7d6847SJulian Elischer.\" This product includes software developed by John Birrell. 150f7d6847SJulian Elischer.\" 4. Neither the name of the author nor the names of any co-contributors 160f7d6847SJulian Elischer.\" may be used to endorse or promote products derived from this software 170f7d6847SJulian Elischer.\" without specific prior written permission. 180f7d6847SJulian Elischer.\" 190f7d6847SJulian Elischer.\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 200f7d6847SJulian Elischer.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 210f7d6847SJulian Elischer.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 220f7d6847SJulian Elischer.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 230f7d6847SJulian Elischer.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 240f7d6847SJulian Elischer.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 250f7d6847SJulian Elischer.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 260f7d6847SJulian Elischer.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 270f7d6847SJulian Elischer.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 280f7d6847SJulian Elischer.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 290f7d6847SJulian Elischer.\" SUCH DAMAGE. 300f7d6847SJulian Elischer.\" 310f7d6847SJulian Elischer.Dd April 4, 1996 320f7d6847SJulian Elischer.Dt PTHREAD_SETSPECIFIC 3 330f7d6847SJulian Elischer.Os BSD 4 340f7d6847SJulian Elischer.Sh NAME 350f7d6847SJulian Elischer.Nm pthread_setspecific 360f7d6847SJulian Elischer.Nd set a thread-specific data value 370f7d6847SJulian Elischer.Sh SYNOPSIS 380f7d6847SJulian Elischer.Fd #include <pthread.h> 390f7d6847SJulian Elischer.Ft int 400f7d6847SJulian Elischer.Fn pthread_setspecific "pthread_key_t key" "const void *value" 410f7d6847SJulian Elischer.Sh DESCRIPTION 420f7d6847SJulian ElischerThe 430f7d6847SJulian Elischer.Fn pthread_setspecific 440f7d6847SJulian Elischerfunction associates a thread-specific value with a 450f7d6847SJulian Elischer.Fa key 460f7d6847SJulian Elischerobtained via a previous call to 470f7d6847SJulian Elischer.Fn pthread_key_create . 480f7d6847SJulian ElischerDifferent threads man bind different values to the same key. These values are 490f7d6847SJulian Elischertypically pointers to blocks of dynamically allocated memory that have been 500f7d6847SJulian Elischerreserved for use by the calling thread. 510f7d6847SJulian Elischer.Pp 520f7d6847SJulian ElischerThe effect of calling 530f7d6847SJulian Elischer.Fn pthread_setspecific 540f7d6847SJulian Elischerwith a key value not obtained from 550f7d6847SJulian Elischer.Fn pthread_key_create 560f7d6847SJulian Elischeror after 570f7d6847SJulian Elischer.Fa key 580f7d6847SJulian Elischerhas been deleted with 590f7d6847SJulian Elischer.Fn pthread_key_delete 600f7d6847SJulian Elischeris undefined. 610f7d6847SJulian Elischer.Pp 620f7d6847SJulian Elischer.Fn pthread_setspecific 630f7d6847SJulian Elischermay be called from a thread-specific data destructor function, however this 640f7d6847SJulian Elischermay result in lost storage or infinite loops. 650f7d6847SJulian Elischer.Sh RETURN VALUES 660f7d6847SJulian ElischerIf successful, the 670f7d6847SJulian Elischer.Fn pthread_setspecific 680f7d6847SJulian Elischerfunction will return zero. Otherwise an error number will be returned to 690f7d6847SJulian Elischerindicate the error. 700f7d6847SJulian Elischer.Sh ERRORS 710f7d6847SJulian Elischer.Fn pthread_setspecific 720f7d6847SJulian Elischerwill fail if: 730f7d6847SJulian Elischer.Bl -tag -width Er 740f7d6847SJulian Elischer.It Bq Er ENOMEM 750f7d6847SJulian ElischerInsufficient memory exists to associate the value with the 760f7d6847SJulian Elischer.Fa key . 770f7d6847SJulian Elischer.It Bq Er EINVAL 780f7d6847SJulian ElischerThe 790f7d6847SJulian Elischer.Fa key 800f7d6847SJulian Elischervalue is invalid. 810f7d6847SJulian Elischer.El 820f7d6847SJulian Elischer.Pp 830f7d6847SJulian Elischer.Sh SEE ALSO 840f7d6847SJulian Elischer.Xr pthread_key_create 3 , 850f7d6847SJulian Elischer.Xr pthread_key_delete 3 , 860f7d6847SJulian Elischer.Xr pthread_getspecific 3 870f7d6847SJulian Elischer.Sh STANDARDS 880f7d6847SJulian Elischer.Fn pthread_setspecific 890f7d6847SJulian Elischeris expected to conform to IEEE 900f7d6847SJulian Elischer.Pq Dq Tn POSIX 910f7d6847SJulian ElischerStd 1003.1c when it is published. 92