/[pcsx2_0.9.7]/trunk/3rdparty/w32pthreads/pthread_mutex_init.c
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Contents of /trunk/3rdparty/w32pthreads/pthread_mutex_init.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
File MIME type: text/plain
File size: 3123 byte(s)
exported r3113 from ./upstream/trunk
1 /*
2 * pthread_mutex_init.c
3 *
4 * Description:
5 * This translation unit implements mutual exclusion (mutex) 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_mutex_init (pthread_mutex_t * mutex, const pthread_mutexattr_t * attr)
41 {
42 int result = 0;
43 pthread_mutex_t mx;
44
45 if (mutex == NULL)
46 {
47 return EINVAL;
48 }
49
50 #ifdef PTW32_STATIC_LIB
51 // This allos for C++ static initializers to function without crashes. (air)
52 pthread_win32_process_attach_np();
53 #endif
54
55 if (attr != NULL
56 && *attr != NULL && (*attr)->pshared == PTHREAD_PROCESS_SHARED)
57 {
58 /*
59 * Creating mutex that can be shared between
60 * processes.
61 */
62 #if _POSIX_THREAD_PROCESS_SHARED >= 0
63
64 /*
65 * Not implemented yet.
66 */
67
68 #error ERROR [__FILE__, line __LINE__]: Process shared mutexes are not supported yet.
69
70 #else
71
72 return ENOSYS;
73
74 #endif /* _POSIX_THREAD_PROCESS_SHARED */
75
76 }
77
78 mx = (pthread_mutex_t) calloc (1, sizeof (*mx));
79
80 if (mx == NULL)
81 {
82 result = ENOMEM;
83 }
84 else
85 {
86 mx->lock_idx = 0;
87 mx->recursive_count = 0;
88 mx->kind = (attr == NULL || *attr == NULL
89 ? PTHREAD_MUTEX_DEFAULT : (*attr)->kind);
90 mx->ownerThread.p = NULL;
91
92 mx->event = CreateEvent (NULL, PTW32_FALSE, /* manual reset = No */
93 PTW32_FALSE, /* initial state = not signaled */
94 NULL); /* event name */
95
96 if (0 == mx->event)
97 {
98 result = ENOSPC;
99 free (mx);
100 mx = NULL;
101 }
102 }
103
104 *mutex = mx;
105
106 return (result);
107 }

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