4 #include <zebra-lock.h>
6 int zebra_mutex_init (Zebra_mutex *p)
8 pthread_mutex_init (&p->mutex, 0);
12 int zebra_mutex_destroy (Zebra_mutex *p)
14 pthread_mutex_destroy (&p->mutex);
18 int zebra_mutex_lock (Zebra_mutex *p)
20 pthread_mutex_lock (&p->mutex);
24 int zebra_mutex_unlock (Zebra_mutex *p)
26 pthread_mutex_unlock (&p->mutex);
30 int zebra_lock_rdwr_init (Zebra_lock_rdwr *p)
32 p->readers_reading = 0;
33 p->writers_writing = 0;
34 pthread_mutex_init (&p->mutex, 0);
35 pthread_cond_init (&p->lock_free, 0);
39 int zebra_lock_rdwr_destroy (Zebra_lock_rdwr *p)
41 assert (p->readers_reading == 0);
42 assert (p->writers_writing == 0);
43 pthread_mutex_destroy (&p->mutex);
44 pthread_cond_destroy (&p->lock_free);
48 int zebra_lock_rdwr_rlock (Zebra_lock_rdwr *p)
50 pthread_mutex_lock (& p->mutex);
51 while (p->writers_writing)
52 pthread_cond_wait (&p->lock_free, &p->mutex);
54 pthread_mutex_unlock(&p->mutex);
58 int zebra_lock_rdwr_wlock (Zebra_lock_rdwr *p)
60 pthread_mutex_lock (&p->mutex);
61 while (p->writers_writing || p->readers_reading)
62 pthread_cond_wait (&p->lock_free, &p->mutex);
64 pthread_mutex_unlock (&p->mutex);
68 int zebra_lock_rdwr_runlock (Zebra_lock_rdwr *p)
70 pthread_mutex_lock (&p->mutex);
71 if (p->readers_reading == 0)
73 pthread_mutex_unlock (&p->mutex);
79 if (p->readers_reading == 0)
80 pthread_cond_signal (&p->lock_free);
81 pthread_mutex_unlock (&p->mutex);
86 int zebra_lock_rdwr_wunlock (Zebra_lock_rdwr *p)
88 pthread_mutex_lock (&p->mutex);
89 if (p->writers_writing == 0)
91 pthread_mutex_unlock (&p->mutex);
97 pthread_cond_broadcast(&p->lock_free);
98 pthread_mutex_unlock(&p->mutex);
103 int zebra_mutex_cond_init (Zebra_mutex_cond *p)
105 pthread_cond_init (&p->cond, 0);
106 pthread_mutex_init (&p->mutex, 0);
110 int zebra_mutex_cond_destroy (Zebra_mutex_cond *p)
112 pthread_cond_destroy (&p->cond);
113 pthread_mutex_destroy (&p->mutex);
117 int zebra_mutex_cond_lock (Zebra_mutex_cond *p)
119 return pthread_mutex_lock (&p->mutex);
122 int zebra_mutex_cond_unlock (Zebra_mutex_cond *p)
124 return pthread_mutex_unlock (&p->mutex);
127 int zebra_mutex_cond_wait (Zebra_mutex_cond *p)
129 return pthread_cond_wait (&p->cond, &p->mutex);
132 int zebra_mutex_cond_signal (Zebra_mutex_cond *p)
134 return pthread_cond_signal (&p->cond);