text: #pragma once
  
  #include <sys/types.h>
  #include <sys/cdefs.h>
  
  __BEGIN_DECLS
  
  int sched_yield();
  
  struct sched_param {
      int sched_priority;
  };
  
  #define SCHED_FIFO 0
  #define SCHED_RR 1
  #define SCHED_OTHER 2
  #define SCHED_BATCH 3
  
  int sched_get_priority_min(int policy);
  int sched_get_priority_max(int policy);
  int sched_setparam(pid_t pid, const struct sched_param *param);
  int sched_getparam(pid_t pid, struct sched_param *param);
  
  __END_DECLS
  