pthread_rwlockattr_getclock()

Updated: April 19, 2023

Get the clock attribute from a read-write lock attribute object

Synopsis:

#include <pthread.h>

int pthread_rwlockattr_getclock( 
                     const pthread_rwlockattr_t *attr,
                     clockid_t *id );

Arguments:

attr
A pointer to the pthread_rwlockattr_t object from which you want to get the clock.
id
A pointer to a clockid_t object where the function can store the clock ID.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The pthread_rwlockattr_getclock() function obtains the value of the clock attribute from the attributes object referenced by attr.

The clock attribute is the clock ID of the clock that's used (as a QNX Neutrino extension) to measure the timeout service of pthread_rwlock_timedrdlock() or pthread_rwlock_timedwrlock(); one of:

The default value of the clock attribute is CLOCK_REALTIME. For more information about the different clocks, see Other clock sources in the Clocks, Timers, and Getting a Kick Every So Often chapter of Getting Started with QNX Neutrino.

Returns:

EOK
Success.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes