This source file includes following definitions.
- glwthread_recmutex_init
- glwthread_recmutex_lock
- glwthread_recmutex_trylock
- glwthread_recmutex_unlock
- glwthread_recmutex_destroy
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20 #include <config.h>
21
22
23 #include "windows-recmutex.h"
24
25 #include <errno.h>
26
27 void
28 glwthread_recmutex_init (glwthread_recmutex_t *mutex)
29 {
30 mutex->owner = 0;
31 mutex->depth = 0;
32 InitializeCriticalSection (&mutex->lock);
33 mutex->guard.done = 1;
34 }
35
36 int
37 glwthread_recmutex_lock (glwthread_recmutex_t *mutex)
38 {
39 if (!mutex->guard.done)
40 {
41 if (InterlockedIncrement (&mutex->guard.started) == 0)
42
43 glwthread_recmutex_init (mutex);
44 else
45 {
46
47 InterlockedDecrement (&mutex->guard.started);
48
49
50 while (!mutex->guard.done)
51 Sleep (0);
52 }
53 }
54 {
55 DWORD self = GetCurrentThreadId ();
56 if (mutex->owner != self)
57 {
58 EnterCriticalSection (&mutex->lock);
59 mutex->owner = self;
60 }
61 if (++(mutex->depth) == 0)
62 {
63 mutex->depth--;
64 return EAGAIN;
65 }
66 }
67 return 0;
68 }
69
70 int
71 glwthread_recmutex_trylock (glwthread_recmutex_t *mutex)
72 {
73 if (!mutex->guard.done)
74 {
75 if (InterlockedIncrement (&mutex->guard.started) == 0)
76
77 glwthread_recmutex_init (mutex);
78 else
79 {
80
81 InterlockedDecrement (&mutex->guard.started);
82
83
84 return EBUSY;
85 }
86 }
87 {
88 DWORD self = GetCurrentThreadId ();
89 if (mutex->owner != self)
90 {
91 if (!TryEnterCriticalSection (&mutex->lock))
92 return EBUSY;
93 mutex->owner = self;
94 }
95 if (++(mutex->depth) == 0)
96 {
97 mutex->depth--;
98 return EAGAIN;
99 }
100 }
101 return 0;
102 }
103
104 int
105 glwthread_recmutex_unlock (glwthread_recmutex_t *mutex)
106 {
107 if (mutex->owner != GetCurrentThreadId ())
108 return EPERM;
109 if (mutex->depth == 0)
110 return EINVAL;
111 if (--(mutex->depth) == 0)
112 {
113 mutex->owner = 0;
114 LeaveCriticalSection (&mutex->lock);
115 }
116 return 0;
117 }
118
119 int
120 glwthread_recmutex_destroy (glwthread_recmutex_t *mutex)
121 {
122 if (mutex->owner != 0)
123 return EBUSY;
124 DeleteCriticalSection (&mutex->lock);
125 mutex->guard.done = 0;
126 return 0;
127 }