pthread_rwlock_unlock man page on FreeBSD

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PTHREAD_RWLOCK_UNLOCK(3) BSD Library Functions Manual PTHREAD_RWLOCK_UNLOCK(3)

NAME
     pthread_rwlock_unlock — release a read/write lock

LIBRARY
     POSIX Threads Library (libpthread, -lpthread)

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 (“SUSv2”).

HISTORY
     The pthread_rwlock_unlock() function first appeared in FreeBSD 3.0.

BSD				August 4, 1998				   BSD
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