/[pcsx2_0.9.7]/trunk/3rdparty/w32pthreads/pthread_barrierattr_setpshared.c
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Contents of /trunk/3rdparty/w32pthreads/pthread_barrierattr_setpshared.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_barrier_attr_setpshared.c
3 *
4 * Description:
5 * This translation unit implements barrier primitives.
6 *
7 * --------------------------------------------------------------------------
8 *
9 * Pthreads-win32 - POSIX Threads Library for Win32
10 * Copyright(C) 1998 John E. Bossom
11 * Copyright(C) 1999,2005 Pthreads-win32 contributors
12 *
13 * Contact Email: rpj@callisto.canberra.edu.au
14 *
15 * The current list of contributors is contained
16 * in the file CONTRIBUTORS included with the source
17 * code distribution. The list can also be seen at the
18 * following World Wide Web location:
19 * http://sources.redhat.com/pthreads-win32/contributors.html
20 *
21 * This library is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU Lesser General Public
23 * License as published by the Free Software Foundation; either
24 * version 2 of the License, or (at your option) any later version.
25 *
26 * This library is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29 * Lesser General Public License for more details.
30 *
31 * You should have received a copy of the GNU Lesser General Public
32 * License along with this library in the file COPYING.LIB;
33 * if not, write to the Free Software Foundation, Inc.,
34 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
35 */
36
37 #include "ptw32pch.h"
38
39
40 int
41 pthread_barrierattr_setpshared (pthread_barrierattr_t * attr, int pshared)
42 /*
43 * ------------------------------------------------------
44 * DOCPUBLIC
45 * Barriers created with 'attr' can be shared between
46 * processes if pthread_barrier_t variable is allocated
47 * in memory shared by these processes.
48 *
49 * PARAMETERS
50 * attr
51 * pointer to an instance of pthread_barrierattr_t
52 *
53 * pshared
54 * must be one of:
55 *
56 * PTHREAD_PROCESS_SHARED
57 * May be shared if in shared memory
58 *
59 * PTHREAD_PROCESS_PRIVATE
60 * Cannot be shared.
61 *
62 * DESCRIPTION
63 * Mutexes creatd with 'attr' can be shared between
64 * processes if pthread_barrier_t variable is allocated
65 * in memory shared by these processes.
66 *
67 * NOTES:
68 * 1) pshared barriers MUST be allocated in shared
69 * memory.
70 *
71 * 2) The following macro is defined if shared barriers
72 * are supported:
73 * _POSIX_THREAD_PROCESS_SHARED
74 *
75 * RESULTS
76 * 0 successfully set attribute,
77 * EINVAL 'attr' or pshared is invalid,
78 * ENOSYS PTHREAD_PROCESS_SHARED not supported,
79 *
80 * ------------------------------------------------------
81 */
82 {
83 int result;
84
85 if ((attr != NULL && *attr != NULL) &&
86 ((pshared == PTHREAD_PROCESS_SHARED) ||
87 (pshared == PTHREAD_PROCESS_PRIVATE)))
88 {
89 if (pshared == PTHREAD_PROCESS_SHARED)
90 {
91
92 #if !defined( _POSIX_THREAD_PROCESS_SHARED )
93
94 result = ENOSYS;
95 pshared = PTHREAD_PROCESS_PRIVATE;
96
97 #else
98
99 result = 0;
100
101 #endif /* _POSIX_THREAD_PROCESS_SHARED */
102
103 }
104 else
105 {
106 result = 0;
107 }
108
109 (*attr)->pshared = pshared;
110 }
111 else
112 {
113 result = EINVAL;
114 }
115
116 return (result);
117
118 } /* pthread_barrierattr_setpshared */

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