The sched.h header file exists The sched.h header defines the structure sched_param which includes the following, at a minimum: int sched_priority When _POSIX_SPORADIC_SERVER is defined, the structure sched_param shall also include the following: int sched_ss_low_priority struct timespec sched_ss_repl_period struct timespec sched_ss_init_budget int sched_ss_max_repl When _POSIX_THREAD_SPORADIC_SERVER is defined, the structure sched_param shall also includes the following: int sched_ss_low_priority struct timespec sched_ss_repl_period struct timespec sched_ss_init_budget int sched_ss_max_repl Each process is controlled by an associated scheduling policy and priority Associated with each policy is a priority range Each policy definition specifies the minimum priority range for that policy The symbolic constants below are defining the four standard policies: SCHED_FIFO SCHED_RR SCHED_SPORADIC (SS, TSP) SCHED_OTHER Other policies may be defined by the implementation. The symbolic constants defined below have all distinct values SCHED_FIFO SCHED_RR SCHED_SPORADIC (SS, TSP) SCHED_OTHER This function is defined: int sched_get_priority_max(int); This function is defined: int sched_get_priority_min(int); This function is defined: int sched_getparam(pid_t, struct sched_param *); This function is defined: int sched_getscheduler(pid_t); This function is defined: int sched_rr_get_interval(pid_t, struct timespec *); This function is defined: int sched_setparam(pid_t, const struct sched_param *); This function is defined: int sched_setscheduler(pid_t, int, const struct sched_param *); This function is defined: int sched_yield(void); Inclusion of the sched.h header may make visible all symbols from the time.h header.