pthread_condattr_getclock, pthread_condattr_setclock — get and set the clock selection condition variable attribute (ADVANCED REALTIME)
THR CS #include <pthread.h> int pthread_condattr_getclock(const pthread_condattr_t *restrictattr
, clockid_t *restrictclock_id
); int pthread_condattr_setclock(pthread_condattr_t *attr
, clockid_tclock_id
);
The pthread_condattr_getclock() function shall obtain the value of the clock attribute from the attributes object referenced by attr. The pthread_condattr_setclock() function shall set the clock attribute in an initialized attributes object referenced by attr. If pthread_condattr_setclock() is called with a clock_id argument that refers to a CPU-time clock, the call shall fail.
The clock attribute is the clock ID of the clock that shall be used to measure the timeout service of pthread_cond_timedwait(). The default value of the clock attribute shall refer to the system clock.
If successful, the pthread_condattr_getclock() function shall return zero and store the value of the clock attribute of attr into the object referenced by the clock_id argument. Otherwise, an error number shall be returned to indicate the error.
If successful, the pthread_condattr_setclock() function shall return zero; otherwise, an error number shall be returned to indicate the error.
These functions may fail if:
[EINVAL] | The value specified by attr is invalid. |
The pthread_condattr_setclock() function may fail if:
[EINVAL] | The value specified by clock_id does not refer to a known clock, or is a CPU-time clock. |
These functions shall not return an error code of [EINTR].
pthread_cond_destroy(), pthread_cond_timedwait(), pthread_condattr_destroy(), pthread_condattr_getpshared() (on page 1041), 1 pthread_condattr_init(), pthread_condattr_setpshared() (on page 1045), 1 pthread_create(), pthread_mutex_init(), the Base Definitions volume of IEEE Std 1003.1-2001, <pthread.h>
18.117.91.2