pthread_rwlock_unlock(3) - NetBSD Manual Pages

PTHREAD_RWLOCK_UNLOC... NetBSD Library Functions ManualPTHREAD_RWLOCK_UNLOC...


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_destroy(3), pthread_rwlock_init(3),
     pthread_rwlock_rdlock(3), pthread_rwlock_wrlock(3)


STANDARDS

     pthread_rwlock_unlock() conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').

NetBSD 5.0.1                   January 30, 2003                   NetBSD 5.0.1