scheduler.c

#include <scheduler.h>
#include <priority-q.h>
#include <td.h>
#include <bwio.h>
// int schedulerInit() {
//     return 0;
// } // add the IDLE task with lowest priority and first USER task maybe


//extern int PushToTDPQ(TDPQ* PQ, TD* Task);

int pushToScheduler (KernelStruct* Colonel, TD* Task) {
  int returncode= PushToTDPQ(&(Colonel->ArrayPQ)[Task->TaskPriority],Task);
  //bwprintf(COM2,"return code of push onto tdpq %d\n\r",returncode);
  return returncode;
}

TD* getNextTaskScheduler (KernelStruct* Colonel) {
  TD *Task;
  int i = 0;
  TDPQ *PQ;
  for(;i<MAX_NUM_PRIORITY;i++){
    PQ = &(Colonel->ArrayPQ)[i];
    if(TDPQReady(PQ) && PQ->Length >0){
        Task = TDPQGetStart(PQ);
        while (Task->TaskState != Ready) {
          TDPQPopStart(PQ);
          pushToScheduler(Colonel, Task);
          Task = TDPQGetStart(PQ);
        }
      return Task;
    }
  }   
  return NULL;
}