setabsdeadline.cpp

一个很棒的网络控制系统仿真软件

#ifndef SET_ABS_DEADLINE
#define SET_ABS_DEADLINE

#include "gettask.cpp"
#include "findQ.cpp"
#include "moveready.cpp"

void updateDLTimer(double time, Task* task) {
  bool found = false;

  TimerNode* tn = (TimerNode*) rtsys->timerQ->getFirst();
  while (tn!=NULL && !found) {
    Timer* t = tn->getTimer();
    if (t->dlORtimer && (t->task == task)) {
      found = true;
      rtsys->timerQ->removeNode(tn);
      // update expiry and insert back in timerQ
      t->time = time;
      rtsys->timerQ->insertSorted(tn);
    } else {
      tn = (TimerNode*) tn->getNext();
    }
  }
}

// set absolute deadline of specific task
void ttSetAbsDeadline(double time, char *nameOfTask) {

  TaskNode *tn;
  Task* task = getTask(nameOfTask);

  if (task == NULL) {
    char buf[200];
    sprintf(buf, "ttSetAbsDeadline: Non-existent task '%s'!", nameOfTask);
    MEX_ERROR(buf);
    return;
  }
  
  if (task->currentJob == NULL) {
    char buf[200];
    sprintf(buf, "ttSetAbsDeadline: No running job for '%s'!", nameOfTask);
    MEX_ERROR(buf);
    return;
  }

  task->currentJob->absDeadline = time;
    
  // Update deadline overrun timer
  if (task->deadlineORhandler != NULL) {
    updateDLTimer(time, task);
  }
    
  // Reshuffle readyQ?
  tn = findInQ(nameOfTask, rtsys->readyQ);
  if (tn != NULL) {
    rtsys->readyQ->deleteNode(tn);
    moveToReadyQ(task);
  }
}

// Set absolute deadline of calling task
void ttSetAbsDeadline(double time) {
  
  if (rtsys->executing == NULL) {
    MEX_ERROR("ttSetAbsDeadline: No running task!");
    return;
  }

  ttSetAbsDeadline(time, rtsys->executing->name);
}

#endif