/[pcsx2_0.9.7]/trunk/3rdparty/w32pthreads/pthread_condattr_getpshared.c
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Revision 10 - (show annotations) (download)
Mon Sep 6 11:40:06 2010 UTC (9 years, 5 months ago) by william
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exported r3113 from ./upstream/trunk
1 /*
2 * pthread_condattr_getpshared.c
3 *
4 * Description:
5 * This translation unit implements condition variables and their primitives.
6 *
7 *
8 * --------------------------------------------------------------------------
9 *
10 * Pthreads-win32 - POSIX Threads Library for Win32
11 * Copyright(C) 1998 John E. Bossom
12 * Copyright(C) 1999,2005 Pthreads-win32 contributors
13 *
14 * Contact Email: rpj@callisto.canberra.edu.au
15 *
16 * The current list of contributors is contained
17 * in the file CONTRIBUTORS included with the source
18 * code distribution. The list can also be seen at the
19 * following World Wide Web location:
20 * http://sources.redhat.com/pthreads-win32/contributors.html
21 *
22 * This library is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU Lesser General Public
24 * License as published by the Free Software Foundation; either
25 * version 2 of the License, or (at your option) any later version.
26 *
27 * This library is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
30 * Lesser General Public License for more details.
31 *
32 * You should have received a copy of the GNU Lesser General Public
33 * License along with this library in the file COPYING.LIB;
34 * if not, write to the Free Software Foundation, Inc.,
35 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
36 */
37
38 #include "ptw32pch.h"
39
40 int
41 pthread_condattr_getpshared (const pthread_condattr_t * attr, int *pshared)
42 /*
43 * ------------------------------------------------------
44 * DOCPUBLIC
45 * Determine whether condition variables created with 'attr'
46 * can be shared between processes.
47 *
48 * PARAMETERS
49 * attr
50 * pointer to an instance of pthread_condattr_t
51 *
52 * pshared
53 * will be set to one of:
54 *
55 * PTHREAD_PROCESS_SHARED
56 * May be shared if in shared memory
57 *
58 * PTHREAD_PROCESS_PRIVATE
59 * Cannot be shared.
60 *
61 *
62 * DESCRIPTION
63 * Condition Variables created with 'attr' can be shared
64 * between processes if pthread_cond_t variable is allocated
65 * in memory shared by these processes.
66 * NOTES:
67 * 1) pshared condition variables MUST be allocated in
68 * shared memory.
69 *
70 * 2) The following macro is defined if shared mutexes
71 * are supported:
72 * _POSIX_THREAD_PROCESS_SHARED
73 *
74 * RESULTS
75 * 0 successfully retrieved attribute,
76 * EINVAL 'attr' or 'pshared' is invalid,
77 *
78 * ------------------------------------------------------
79 */
80 {
81 int result;
82
83 if ((attr != NULL && *attr != NULL) && (pshared != NULL))
84 {
85 *pshared = (*attr)->pshared;
86 result = 0;
87 }
88 else
89 {
90 result = EINVAL;
91 }
92
93 return result;
94
95 } /* pthread_condattr_getpshared */

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