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

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Revision 31 - (show annotations) (download)
Tue Sep 7 03:24:11 2010 UTC (9 years, 10 months ago) by william
File MIME type: text/plain
File size: 2879 byte(s)
committing r3113 initial commit again...
1 /*
2 * pthread_rwlock_init.c
3 *
4 * Description:
5 * This translation unit implements read/write lock 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 int
40 pthread_rwlock_init (pthread_rwlock_t * rwlock,
41 const pthread_rwlockattr_t * attr)
42 {
43 int result;
44 pthread_rwlock_t rwl = 0;
45
46 if (rwlock == NULL)
47 {
48 return EINVAL;
49 }
50
51 #ifdef PTW32_STATIC_LIB
52 // This allos for C++ static initializers to function without crashes. (air)
53 pthread_win32_process_attach_np();
54 #endif
55
56 if (attr != NULL && *attr != NULL)
57 {
58 result = EINVAL; /* Not supported */
59 goto DONE;
60 }
61
62 rwl = (pthread_rwlock_t) calloc (1, sizeof (*rwl));
63
64 if (rwl == NULL)
65 {
66 result = ENOMEM;
67 goto DONE;
68 }
69
70 rwl->nSharedAccessCount = 0;
71 rwl->nExclusiveAccessCount = 0;
72 rwl->nCompletedSharedAccessCount = 0;
73
74 result = pthread_mutex_init (&rwl->mtxExclusiveAccess, NULL);
75 if (result != 0)
76 {
77 goto FAIL0;
78 }
79
80 result = pthread_mutex_init (&rwl->mtxSharedAccessCompleted, NULL);
81 if (result != 0)
82 {
83 goto FAIL1;
84 }
85
86 result = pthread_cond_init (&rwl->cndSharedAccessCompleted, NULL);
87 if (result != 0)
88 {
89 goto FAIL2;
90 }
91
92 rwl->nMagic = PTW32_RWLOCK_MAGIC;
93
94 result = 0;
95 goto DONE;
96
97 FAIL2:
98 (void) pthread_mutex_destroy (&(rwl->mtxSharedAccessCompleted));
99
100 FAIL1:
101 (void) pthread_mutex_destroy (&(rwl->mtxExclusiveAccess));
102
103 FAIL0:
104 (void) free (rwl);
105 rwl = NULL;
106
107 DONE:
108 *rwlock = rwl;
109
110 return result;
111 }

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