PTHREAD_RWLOCK_UNLO... FreeBSD Library Functions Manual PTHREAD_RWLOCK_UNLO...
pthread_rwlock_unlock -- release a read/write lock
Reentrant C Library (libc_r, -lc_r)
The pthread_rwlock_unlock() function is used to release the read/write
lock previously obtained by pthread_rwlock_rdlock(),
pthread_rwlock_wrlock(), pthread_rwlock_tryrdlock(), or
If successful, the pthread_rwlock_unlock() function will return zero.
Otherwise an error number will be returned to indicate the error.
The results are undefined if lock is not held by the calling thread.
The pthread_rwlock_unlock() function is expected to conform to Version 2
of the Single UNIX Specification (``SUSv2'').
The pthread_rwlock_unlock() function may fail if:
[EINVAL] The value specified by lock is invalid.
[EPERM] The current thread does not own the read/write lock.
The pthread_rwlock_unlock() function first appeared in FreeBSD 3.0.
FreeBSD 5.2.1 August 4, 1998 FreeBSD 5.2.1 [ Back ]