#include int sched_yield(void) { rt_thread_yield(); return 0; } RTM_EXPORT(sched_yield); int sched_get_priority_min(int policy) { if (policy != SCHED_FIFO && policy != SCHED_RR) return EINVAL; return 0; } RTM_EXPORT(sched_get_priority_min); int sched_get_priority_max(int policy) { if (policy != SCHED_FIFO && policy != SCHED_RR) return EINVAL; return RT_THREAD_PRIORITY_MAX - 1; } RTM_EXPORT(sched_get_priority_max); int sched_setscheduler(pid_t pid, int policy) { return ENOTSUP; } RTM_EXPORT(sched_setscheduler);