exitmonitor.cpp

来自「一个很棒的网络控制系统仿真软件」· C++ 代码 · 共 45 行

#ifndef EXIT_MONITOR
#define EXIT_MONITOR

#include "moveready.cpp"

void ttExitMonitor(char *nameOfMonitor) {

  MonitorNode* mn;
  Monitor* mon;
  TaskNode* tn;
  
  mn = (MonitorNode*) rtsys->monitorList->getFirst();
  while (mn != NULL) {
    mon = mn->getMonitor();
    if (mon->name != NULL) {
      if (strcmp(mon->name, nameOfMonitor) == 0)
	break;
    }
    mn = (MonitorNode*) mn->getNext();
  }
  
  if (mn == NULL) {
    // Monitor does not exist 
    char buf[200];
    sprintf(buf, "ttExitMonitor: Non-existent monitor '%s'!", nameOfMonitor);
    MEX_ERROR(buf);
    return;
  }

  if (mon->heldBy != rtsys->executing) {
    MEX_ERROR("ttExitMonitor: Only the task holding the monitor can exit from it!");
  }

  mon = mn->getMonitor();
  mon->heldBy = NULL;
  tn = (TaskNode*) mon->waitingQ->getFirst();
  if (tn != NULL) {
    moveToReadyQ(tn->getTask());
    mon->heldBy = tn->getTask();
    mon->waitingQ->deleteNode(tn);
  }
  rtsys->executing->priority = rtsys->executing->assignedPriority;
}
#endif