Destroying a Read-Write Lock

pthread_rwlock_destroy(3C) destroys the read-write lock object referenced by rwlock and releases any resources used by the lock.

pthread_rwlock_destroy Syntax

#include <pthread.h>

int pthread_rwlock_destroy(pthread_rwlock_t **rwlock);

The effect of subsequent use of the lock is undefined until the lock is re-initialized by another call to pthread_rwlock_init(). An implementation can cause pthread_rwlock_destroy() to set the object referenced by rwlock to an invalid value. Results are undefined if pthread_rwlock_destroy() is called when any thread holds rwlock. Attempting to destroy an uninitialized read-write lock results in undefined behavior. A destroyed read-write lock object can be re-initialized using pthread_rwlock_init(). The results of otherwise referencing the read-write lock object after the lock object has been destroyed are undefined.

pthread_rwlock_destroy Return Values

If successful, pthread_rwlock_destroy() returns zero. Otherwise, an error number is returned to indicate the error.

EINVAL

Description:

The value specified by attr or rwlock is invalid.