1 | /* glpenv02.c (thread local storage) */ |
---|
2 | |
---|
3 | /*********************************************************************** |
---|
4 | * This code is part of GLPK (GNU Linear Programming Kit). |
---|
5 | * |
---|
6 | * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
---|
7 | * 2009, 2010 Andrew Makhorin, Department for Applied Informatics, |
---|
8 | * Moscow Aviation Institute, Moscow, Russia. All rights reserved. |
---|
9 | * E-mail: <mao@gnu.org>. |
---|
10 | * |
---|
11 | * GLPK is free software: you can redistribute it and/or modify it |
---|
12 | * under the terms of the GNU General Public License as published by |
---|
13 | * the Free Software Foundation, either version 3 of the License, or |
---|
14 | * (at your option) any later version. |
---|
15 | * |
---|
16 | * GLPK is distributed in the hope that it will be useful, but WITHOUT |
---|
17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
---|
18 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
---|
19 | * License for more details. |
---|
20 | * |
---|
21 | * You should have received a copy of the GNU General Public License |
---|
22 | * along with GLPK. If not, see <http://www.gnu.org/licenses/>. |
---|
23 | ***********************************************************************/ |
---|
24 | |
---|
25 | #include "glpenv.h" |
---|
26 | |
---|
27 | static void *tls = NULL; |
---|
28 | /* in a re-entrant version of the package this variable must be placed |
---|
29 | in the Thread Local Storage (TLS) */ |
---|
30 | |
---|
31 | /*********************************************************************** |
---|
32 | * NAME |
---|
33 | * |
---|
34 | * tls_set_ptr - store global pointer in TLS |
---|
35 | * |
---|
36 | * SYNOPSIS |
---|
37 | * |
---|
38 | * #include "glpenv.h" |
---|
39 | * void tls_set_ptr(void *ptr); |
---|
40 | * |
---|
41 | * DESCRIPTION |
---|
42 | * |
---|
43 | * The routine tls_set_ptr stores a pointer specified by the parameter |
---|
44 | * ptr in the Thread Local Storage (TLS). */ |
---|
45 | |
---|
46 | void tls_set_ptr(void *ptr) |
---|
47 | { tls = ptr; |
---|
48 | return; |
---|
49 | } |
---|
50 | |
---|
51 | /*********************************************************************** |
---|
52 | * NAME |
---|
53 | * |
---|
54 | * tls_get_ptr - retrieve global pointer from TLS |
---|
55 | * |
---|
56 | * SYNOPSIS |
---|
57 | * |
---|
58 | * #include "glpenv.h" |
---|
59 | * void *tls_get_ptr(void); |
---|
60 | * |
---|
61 | * RETURNS |
---|
62 | * |
---|
63 | * The routine tls_get_ptr returns a pointer previously stored by the |
---|
64 | * routine tls_set_ptr. If the latter has not been called yet, NULL is |
---|
65 | * returned. */ |
---|
66 | |
---|
67 | void *tls_get_ptr(void) |
---|
68 | { void *ptr; |
---|
69 | ptr = tls; |
---|
70 | return ptr; |
---|
71 | } |
---|
72 | |
---|
73 | /* eof */ |
---|