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26 .Dt PTHREAD_RWLOCK_UNLOCK 3
29 .Nm pthread_rwlock_unlock
30 .Nd release a read/write lock
36 .Fn pthread_rwlock_unlock "pthread_rwlock_t *lock"
39 .Fn pthread_rwlock_unlock
40 function is used to release the read/write lock previously obtained by
41 .Fn pthread_rwlock_rdlock ,
42 .Fn pthread_rwlock_wrlock ,
43 .Fn pthread_rwlock_tryrdlock ,
45 .Fn pthread_rwlock_trywrlock .
48 .Fn pthread_rwlock_unlock
49 function will return zero.
50 Otherwise an error number will be returned
51 to indicate the error.
53 The results are undefined if
55 is not held by the calling thread.
58 .Fn pthread_rwlock_unlock
62 The value specified by
66 The current thread does not own the read/write lock.
69 .Xr pthread_rwlock_rdlock 3 ,
70 .Xr pthread_rwlock_wrlock 3
73 .Fn pthread_rwlock_unlock
74 function is expected to conform to
78 .Fn pthread_rwlock_unlock
79 function first appeared in