85 lines
2.9 KiB
Groff
85 lines
2.9 KiB
Groff
.\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>.
|
|
.\" 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 4, 1996
|
|
.Dt PTHREAD_GETSPECIFIC 3
|
|
.Os BSD 4
|
|
.Sh NAME
|
|
.Nm pthread_getspecific
|
|
.Nd get a thread-specific data value
|
|
.Sh LIBRARY
|
|
.Lb libc_r
|
|
.Sh SYNOPSIS
|
|
.Fd #include <pthread.h>
|
|
.Ft void *
|
|
.Fn pthread_getspecific "pthread_key_t key"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn pthread_getspecific
|
|
function returns the value currently bound to the specified
|
|
.Fa key
|
|
on behalf of the calling thread.
|
|
.Pp
|
|
The effect of calling
|
|
.Fn pthread_getspecific
|
|
with a
|
|
.Fa key
|
|
value not obtained from
|
|
.Fn pthread_key_create
|
|
or after
|
|
.Fa key
|
|
has been deleted with
|
|
.Fn pthread_key_delete
|
|
is undefined.
|
|
.Pp
|
|
.Fn pthread_getspecific
|
|
may be called from a thread-specific data destructor function.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn pthread_getspecific
|
|
function will return the thread-specific data value associated with the given
|
|
.Fa key .
|
|
If no thread-specific data value is associated with
|
|
.Fa key ,
|
|
then the value NULL is returned.
|
|
.Sh ERRORS
|
|
None.
|
|
.Sh SEE ALSO
|
|
.Xr pthread_key_create 3 ,
|
|
.Xr pthread_key_delete 3 ,
|
|
.Xr pthread_setspecific 3
|
|
.Sh STANDARDS
|
|
.Fn pthread_getspecific
|
|
conforms to ISO/IEC 9945-1 ANSI/IEEE
|
|
.Pq Dq Tn POSIX
|
|
Std 1003.1 Second Edition 1996-07-12.
|