Name
NAME
pthread_attr_getschedpolicy, pthread_attr_setschedpolicy — get and set the schedpolicy attribute (REALTIME THREADS)
SYNOPSIS
THR TPS #include <pthread.h> int pthread_attr_getschedpolicy(const pthread_attr_t *restrictattr
, int *restrictpolicy
); int pthread_attr_setschedpolicy(pthread_attr_t *attr
, intpolicy
);
DESCRIPTION
The pthread_attr_getschedpolicy() and pthread_attr_setschedpolicy() functions, respectively, shall get and set the schedpolicy attribute in the attr argument.
TSP The supported values of policy shall include SCHED_FIFO, SCHED_RR, and SCHED_OTHER, which are defined in the <sched.h> header. When threads executing with the scheduling policy SCHED_FIFO, SCHED_RR, or SCHED_SPORADIC are waiting on a mutex, they shall acquire the mutex in priority order when the mutex is unlocked.
RETURN VALUE
If successful, the pthread_attr_getschedpolicy() and pthread_attr_setschedpolicy() functions shall return zero; otherwise, an error number shall be returned to indicate the error.
ERRORS
The pthread_attr_setschedpolicy() function may fail if:
[EINVAL] | The value of policy is not valid. |
[ENOTSUP] | An attempt was made to set the attribute to an unsupported value. |
These functions shall not return an error code of [EINTR].
EXAMPLES
None.
APPLICATION USAGE
After these attributes have been set, a thread can be created with the specified attributes using pthread_create(). Using these routines does not affect the current running thread.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
pthread_attr_destroy ...
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