Updated: April 19, 2023 |
Get the clock attribute from a read-write lock attribute object
#include <pthread.h> int pthread_rwlockattr_getclock( const pthread_rwlockattr_t *attr, clockid_t *id );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
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:
While the processor isn't in a power-saving mode, CLOCK_SOFTTIME behaves the same as CLOCK_REALTIME.
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.
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |