4 #include <zebra-lock.h>
6 int zebra_mutex_init (Zebra_mutex *p)
9 pthread_mutex_init (&p->mutex, 0);
12 InitializeCriticalSection (&p->mutex);
17 int zebra_mutex_destroy (Zebra_mutex *p)
20 pthread_mutex_destroy (&p->mutex);
23 DeleteCriticalSection (&p->mutex);
28 int zebra_mutex_lock (Zebra_mutex *p)
31 pthread_mutex_lock (&p->mutex);
34 EnterCriticalSection (&p->mutex);
39 int zebra_mutex_unlock (Zebra_mutex *p)
42 pthread_mutex_unlock (&p->mutex);
45 LeaveCriticalSection (&p->mutex);
50 int zebra_lock_rdwr_init (Zebra_lock_rdwr *p)
52 p->readers_reading = 0;
53 p->writers_writing = 0;
55 pthread_mutex_init (&p->mutex, 0);
56 pthread_cond_init (&p->lock_free, 0);
61 int zebra_lock_rdwr_destroy (Zebra_lock_rdwr *p)
63 assert (p->readers_reading == 0);
64 assert (p->writers_writing == 0);
66 pthread_mutex_destroy (&p->mutex);
67 pthread_cond_destroy (&p->lock_free);
72 int zebra_lock_rdwr_rlock (Zebra_lock_rdwr *p)
75 pthread_mutex_lock (& p->mutex);
76 while (p->writers_writing)
77 pthread_cond_wait (&p->lock_free, &p->mutex);
79 pthread_mutex_unlock(&p->mutex);
84 int zebra_lock_rdwr_wlock (Zebra_lock_rdwr *p)
87 pthread_mutex_lock (&p->mutex);
88 while (p->writers_writing || p->readers_reading)
89 pthread_cond_wait (&p->lock_free, &p->mutex);
91 pthread_mutex_unlock (&p->mutex);
96 int zebra_lock_rdwr_runlock (Zebra_lock_rdwr *p)
99 pthread_mutex_lock (&p->mutex);
100 if (p->readers_reading == 0)
102 pthread_mutex_unlock (&p->mutex);
107 p->readers_reading--;
108 if (p->readers_reading == 0)
109 pthread_cond_signal (&p->lock_free);
110 pthread_mutex_unlock (&p->mutex);
116 int zebra_lock_rdwr_wunlock (Zebra_lock_rdwr *p)
119 pthread_mutex_lock (&p->mutex);
120 if (p->writers_writing == 0)
122 pthread_mutex_unlock (&p->mutex);
127 p->writers_writing--;
128 pthread_cond_broadcast(&p->lock_free);
129 pthread_mutex_unlock(&p->mutex);
135 int zebra_mutex_cond_init (Zebra_mutex_cond *p)
138 pthread_cond_init (&p->cond, 0);
139 pthread_mutex_init (&p->mutex, 0);
144 int zebra_mutex_cond_destroy (Zebra_mutex_cond *p)
147 pthread_cond_destroy (&p->cond);
148 pthread_mutex_destroy (&p->mutex);
153 int zebra_mutex_cond_lock (Zebra_mutex_cond *p)
156 return pthread_mutex_lock (&p->mutex);
162 int zebra_mutex_cond_unlock (Zebra_mutex_cond *p)
165 return pthread_mutex_unlock (&p->mutex);
171 int zebra_mutex_cond_wait (Zebra_mutex_cond *p)
174 return pthread_cond_wait (&p->cond, &p->mutex);
180 int zebra_mutex_cond_signal (Zebra_mutex_cond *p)
183 return pthread_cond_signal (&p->cond);