pthread_rwlock_unlock man page on OpenBSD
[printable version]
PTHREAD_RWLOCK_UNLOCK(3) OpenBSD Programmer's Manual PTHREAD_RWLOCK_UNLOCK(3)
NAME
pthread_rwlock_unlock - release a read/write lock
SYNOPSIS
#include <pthread.h>
int
pthread_rwlock_unlock(pthread_rwlock_t *lock);
DESCRIPTION
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
pthread_rwlock_trywrlock().
RETURN VALUES
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.
ERRORS
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.
SEE ALSO
pthread_rwlock_rdlock(3), pthread_rwlock_wrlock(3)
STANDARDS
The pthread_rwlock_unlock() function is expected to conform to Version 2
of the Single UNIX Specification.
HISTORY
The pthread_rwlock_unlock() function first appeared in FreeBSD 3.0 and
OpenBSD 2.5.
OpenBSD 4.9 May 31, 2007 OpenBSD 4.9
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