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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 SYNOPSIS #include <pthread.h> int pthread_rwlock_unlock(pthread_rwlock_t *rwlock); 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 rwlock is not held by the calling thread. 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''). ERRORS The pthread_rwlock_unlock() function may fail if: [EINVAL] The value specified by rwlock is invalid. [EPERM] The current thread does not own the read/write lock. HISTORY The pthread_rwlock_unlock() function first appeared in FreeBSD 3.0. BSD August 4, 1998 BSD |