/[pcsx2_0.9.7]/trunk/3rdparty/w32pthreads/pthread_condattr_setpshared.c
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Contents of /trunk/3rdparty/w32pthreads/pthread_condattr_setpshared.c

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Revision 31 - (show annotations) (download)
Tue Sep 7 03:24:11 2010 UTC (9 years, 11 months ago) by william
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committing r3113 initial commit again...
1 /*
2 * pthread_condattr_setpshared.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
41 int
42 pthread_condattr_setpshared (pthread_condattr_t * attr, int pshared)
43 /*
44 * ------------------------------------------------------
45 * DOCPUBLIC
46 * Mutexes created with 'attr' can be shared between
47 * processes if pthread_mutex_t variable is allocated
48 * in memory shared by these processes.
49 *
50 * PARAMETERS
51 * attr
52 * pointer to an instance of pthread_mutexattr_t
53 *
54 * pshared
55 * must be one of:
56 *
57 * PTHREAD_PROCESS_SHARED
58 * May be shared if in shared memory
59 *
60 * PTHREAD_PROCESS_PRIVATE
61 * Cannot be shared.
62 *
63 * DESCRIPTION
64 * Mutexes creatd with 'attr' can be shared between
65 * processes if pthread_mutex_t variable is allocated
66 * in memory shared by these processes.
67 *
68 * NOTES:
69 * 1) pshared mutexes MUST be allocated in shared
70 * memory.
71 *
72 * 2) The following macro is defined if shared mutexes
73 * are supported:
74 * _POSIX_THREAD_PROCESS_SHARED
75 *
76 * RESULTS
77 * 0 successfully set attribute,
78 * EINVAL 'attr' or pshared is invalid,
79 * ENOSYS PTHREAD_PROCESS_SHARED not supported,
80 *
81 * ------------------------------------------------------
82 */
83 {
84 int result;
85
86 if ((attr != NULL && *attr != NULL)
87 && ((pshared == PTHREAD_PROCESS_SHARED)
88 || (pshared == PTHREAD_PROCESS_PRIVATE)))
89 {
90 if (pshared == PTHREAD_PROCESS_SHARED)
91 {
92
93 #if !defined( _POSIX_THREAD_PROCESS_SHARED )
94 result = ENOSYS;
95 pshared = PTHREAD_PROCESS_PRIVATE;
96 #else
97 result = 0;
98
99 #endif /* _POSIX_THREAD_PROCESS_SHARED */
100
101 }
102 else
103 {
104 result = 0;
105 }
106
107 (*attr)->pshared = pshared;
108 }
109 else
110 {
111 result = EINVAL;
112 }
113
114 return result;
115
116 } /* pthread_condattr_setpshared */

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