4 #include <zebra-lock.h>
6 int zebra_mutex_init (Zebra_mutex *p)
9 pthread_mutex_init (&p->mutex, 0);
14 int zebra_mutex_destroy (Zebra_mutex *p)
17 pthread_mutex_destroy (&p->mutex);
22 int zebra_mutex_lock (Zebra_mutex *p)
25 pthread_mutex_lock (&p->mutex);
30 int zebra_mutex_unlock (Zebra_mutex *p)
33 pthread_mutex_unlock (&p->mutex);
38 int zebra_lock_rdwr_init (Zebra_lock_rdwr *p)
40 p->readers_reading = 0;
41 p->writers_writing = 0;
43 pthread_mutex_init (&p->mutex, 0);
44 pthread_cond_init (&p->lock_free, 0);
49 int zebra_lock_rdwr_destroy (Zebra_lock_rdwr *p)
51 assert (p->readers_reading == 0);
52 assert (p->writers_writing == 0);
54 pthread_mutex_destroy (&p->mutex);
55 pthread_cond_destroy (&p->lock_free);
60 int zebra_lock_rdwr_rlock (Zebra_lock_rdwr *p)
63 pthread_mutex_lock (& p->mutex);
64 while (p->writers_writing)
65 pthread_cond_wait (&p->lock_free, &p->mutex);
67 pthread_mutex_unlock(&p->mutex);
72 int zebra_lock_rdwr_wlock (Zebra_lock_rdwr *p)
75 pthread_mutex_lock (&p->mutex);
76 while (p->writers_writing || p->readers_reading)
77 pthread_cond_wait (&p->lock_free, &p->mutex);
79 pthread_mutex_unlock (&p->mutex);
84 int zebra_lock_rdwr_runlock (Zebra_lock_rdwr *p)
87 pthread_mutex_lock (&p->mutex);
88 if (p->readers_reading == 0)
90 pthread_mutex_unlock (&p->mutex);
96 if (p->readers_reading == 0)
97 pthread_cond_signal (&p->lock_free);
98 pthread_mutex_unlock (&p->mutex);
104 int zebra_lock_rdwr_wunlock (Zebra_lock_rdwr *p)
107 pthread_mutex_lock (&p->mutex);
108 if (p->writers_writing == 0)
110 pthread_mutex_unlock (&p->mutex);
115 p->writers_writing--;
116 pthread_cond_broadcast(&p->lock_free);
117 pthread_mutex_unlock(&p->mutex);
123 int zebra_mutex_cond_init (Zebra_mutex_cond *p)
126 pthread_cond_init (&p->cond, 0);
127 pthread_mutex_init (&p->mutex, 0);
132 int zebra_mutex_cond_destroy (Zebra_mutex_cond *p)
135 pthread_cond_destroy (&p->cond);
136 pthread_mutex_destroy (&p->mutex);
141 int zebra_mutex_cond_lock (Zebra_mutex_cond *p)
144 return pthread_mutex_lock (&p->mutex);
150 int zebra_mutex_cond_unlock (Zebra_mutex_cond *p)
153 return pthread_mutex_unlock (&p->mutex);
159 int zebra_mutex_cond_wait (Zebra_mutex_cond *p)
162 return pthread_cond_wait (&p->cond, &p->mutex);
168 int zebra_mutex_cond_signal (Zebra_mutex_cond *p)
171 return pthread_cond_signal (&p->cond);