PageRenderTime 28ms CodeModel.GetById 20ms app.highlight 2ms RepoModel.GetById 2ms app.codeStats 0ms

/share/man/man3/pthread_setspecific.3

https://bitbucket.org/freebsd/freebsd-head/
Unknown | 98 lines | 98 code | 0 blank | 0 comment | 0 complexity | cbd0bf5f9a65d32ae802516c70607d49 MD5 | raw file
 1.\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>.
 2.\" All rights reserved.
 3.\"
 4.\" Redistribution and use in source and binary forms, with or without
 5.\" modification, are permitted provided that the following conditions
 6.\" are met:
 7.\" 1. Redistributions of source code must retain the above copyright
 8.\"    notice, this list of conditions and the following disclaimer.
 9.\" 2. Redistributions in binary form must reproduce the above copyright
10.\"    notice, this list of conditions and the following disclaimer in the
11.\"    documentation and/or other materials provided with the distribution.
12.\" 3. All advertising materials mentioning features or use of this software
13.\"    must display the following acknowledgement:
14.\"	This product includes software developed by John Birrell.
15.\" 4. Neither the name of the author nor the names of any co-contributors
16.\"    may be used to endorse or promote products derived from this software
17.\"    without specific prior written permission.
18.\"
19.\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29.\" SUCH DAMAGE.
30.\"
31.\" $FreeBSD$
32.\"
33.Dd April 4, 1996
34.Dt PTHREAD_SETSPECIFIC 3
35.Os
36.Sh NAME
37.Nm pthread_setspecific
38.Nd set a thread-specific data value
39.Sh LIBRARY
40.Lb libpthread
41.Sh SYNOPSIS
42.In pthread.h
43.Ft int
44.Fn pthread_setspecific "pthread_key_t key" "const void *value"
45.Sh DESCRIPTION
46The
47.Fn pthread_setspecific
48function associates a thread-specific value with a
49.Fa key
50obtained via a previous call to
51.Fn pthread_key_create .
52Different threads can bind different values to the same key.
53These values are
54typically pointers to blocks of dynamically allocated memory that have been
55reserved for use by the calling thread.
56.Pp
57The effect of calling
58.Fn pthread_setspecific
59with a key value not obtained from
60.Fn pthread_key_create
61or after
62.Fa key
63has been deleted with
64.Fn pthread_key_delete
65is undefined.
66.Pp
67The
68.Fn pthread_setspecific
69function may be called from a thread-specific data destructor function,
70however this may result in lost storage or infinite loops.
71.Sh RETURN VALUES
72If successful, the
73.Fn pthread_setspecific
74function will return zero.
75Otherwise an error number will be returned to
76indicate the error.
77.Sh ERRORS
78The
79.Fn pthread_setspecific
80function will fail if:
81.Bl -tag -width Er
82.It Bq Er ENOMEM
83Insufficient memory exists to associate the value with the
84.Fa key .
85.It Bq Er EINVAL
86The
87.Fa key
88value is invalid.
89.El
90.Sh SEE ALSO
91.Xr pthread_getspecific 3 ,
92.Xr pthread_key_create 3 ,
93.Xr pthread_key_delete 3
94.Sh STANDARDS
95The
96.Fn pthread_setspecific
97function conforms to
98.St -p1003.1-96 .