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_GETSPECIFIC 3 33a307d598SRuslan Ermilov.Os 340f7d6847SJulian Elischer.Sh NAME 350f7d6847SJulian Elischer.Nm pthread_getspecific 360f7d6847SJulian Elischer.Nd get a thread-specific data value 37d8a78688SAlexey Zelkin.Sh LIBRARY 38ec7452f1SRuslan Ermilov.Lb libpthread 390f7d6847SJulian Elischer.Sh SYNOPSIS 4032eef9aeSRuslan Ermilov.In pthread.h 410f7d6847SJulian Elischer.Ft void * 420f7d6847SJulian Elischer.Fn pthread_getspecific "pthread_key_t key" 430f7d6847SJulian Elischer.Sh DESCRIPTION 440f7d6847SJulian ElischerThe 450f7d6847SJulian Elischer.Fn pthread_getspecific 460f7d6847SJulian Elischerfunction returns the value currently bound to the specified 470f7d6847SJulian Elischer.Fa key 480f7d6847SJulian Elischeron behalf of the calling thread. 490f7d6847SJulian Elischer.Pp 500f7d6847SJulian ElischerThe effect of calling 510f7d6847SJulian Elischer.Fn pthread_getspecific 520f7d6847SJulian Elischerwith a 530f7d6847SJulian Elischer.Fa key 540f7d6847SJulian Elischervalue 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 629d09157aSPhilippe CharnierThe 630f7d6847SJulian Elischer.Fn pthread_getspecific 649d09157aSPhilippe Charnierfunction may be called from a thread-specific data destructor function. 65*a5019a3bSPatrick KelseyA call to 66*a5019a3bSPatrick Kelsey.Fn pthread_getspecific 67*a5019a3bSPatrick Kelseyfor the thread-specific data key being destroyed returns the value NULL, 68*a5019a3bSPatrick Kelseyunless the value is changed (after the destructor starts) by a call to 69*a5019a3bSPatrick Kelsey.Fn pthread_setspecific . 700f7d6847SJulian Elischer.Sh RETURN VALUES 710f7d6847SJulian ElischerThe 720f7d6847SJulian Elischer.Fn pthread_getspecific 730f7d6847SJulian Elischerfunction will return the thread-specific data value associated with the given 740f7d6847SJulian Elischer.Fa key . 750f7d6847SJulian ElischerIf no thread-specific data value is associated with 760f7d6847SJulian Elischer.Fa key , 770f7d6847SJulian Elischerthen the value NULL is returned. 780f7d6847SJulian Elischer.Sh ERRORS 790f7d6847SJulian ElischerNone. 800f7d6847SJulian Elischer.Sh SEE ALSO 810f7d6847SJulian Elischer.Xr pthread_key_create 3 , 82e0e5145cSWolfram Schneider.Xr pthread_key_delete 3 , 830f7d6847SJulian Elischer.Xr pthread_setspecific 3 840f7d6847SJulian Elischer.Sh STANDARDS 859d09157aSPhilippe CharnierThe 860f7d6847SJulian Elischer.Fn pthread_getspecific 879d09157aSPhilippe Charnierfunction conforms to 88096841ecSRuslan Ermilov.St -p1003.1-96 . 89