cc -mt [ flag... ] file... -lpthread [ library... ] #include <pthread.h>
int pthread_attr_getschedparam(const pthread_attr_t *restrict attr, struct sched_param *restrict param);
int pthread_attr_setschedparam(pthread_attr_t *restrict attr, const struct sched_param *restrict param);
The functions pthread_attr_setschedparam() and pthread_attr_getschedparam(), respectively, set and get the scheduling parameter attributes in the attr argument. The contents of the param structure are defined in <sched.h>. For the SCHED_FIFO and SCHED_RR policies, the only required member of param is sched_priority.
If successful, the pthread_attr_setschedparam() and pthread_attr_getschedparam() functions return 0. Otherwise, an error number is returned to indicate the error.
The pthread_attr_setschedparam() function may fail if:
EINVAL attr is invalid.
The pthread_attr_getschedparam() function may fail if:
EINVAL attr or param is invalid.
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.
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Standard |
| MT-Level | MT-Safe |
pthread_attr_init(3C), pthread_attr_setscope(3C), pthread_attr_setinheritsched(3C), pthread_attr_setschedpolicy(3C), pthread_create(3C), pthread_setschedparam(3C), attributes(5), standards(5)