manpagez: man(ual) pages & more
man pthread_rwlock_unlock(3)
Home | html | info | man

pthread_rwlock_unlock(3) BSD Library Functions 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 (``SUSv2'').


HISTORY

     The pthread_rwlock_unlock() function first appeared in FreeBSD 3.0.

BSD                             August 4, 1998                             BSD

Mac OS X 10.12.3 - Generated Sun Feb 5 16:27:38 CST 2017
© manpagez.com 2000-2017
Individual documents may contain additional copyright information.