Esempio n. 1
0
void phi_put_forks_condvar(int i) {
     down(&(mtp->mutex));

//--------into routine in monitor--------------
     // LAB7 EXERCISE1: YOUR CODE
	 state_condvar[i]=THINKING; // I ate over
     phi_test_condvar(LEFT);// test left and right neighbors
	 phi_test_condvar(RIGHT);
//--------leave routine in monitor--------------
     if(mtp->next_count>0)
        up(&(mtp->next));
     else
        up(&(mtp->mutex));
}
Esempio n. 2
0
void phi_take_forks_condvar(int i) {
     down(&(mtp->mutex));
//--------into routine in monitor--------------
     // LAB7 EXERCISE1: YOUR CODE
	 state_condvar[i]=HUNGRY;		// I am hungry
     phi_test_condvar(i);// try to get fork
//--------leave routine in monitor--------------
      if(mtp->next_count>0)
         up(&(mtp->next));
      else
         up(&(mtp->mutex));
}
void phi_put_forks_condvar(int i) {
     down(&(mtp->mutex));

//--------into routine in monitor--------------
     // LAB7 EXERCISE1: 2013011377
     // I ate over
     // test left and right neighbors
//--------leave routine in monitor--------------
     state_condvar[i] = THINKING;
     phi_test_condvar(LEFT);
     phi_test_condvar(RIGHT);

#ifdef HANSEN
	up(&(mtp->mutex));
#else
	if(mtp->next_count>0)
		up(&(mtp->next));
	else
		up(&(mtp->mutex));
#endif //HANSEN
}
Esempio n. 4
0
void phi_take_forks_condvar(int i) {
     down(&(mtp->mutex));
//--------into routine in monitor--------------
     // LAB7 EXERCISE1: YOUR CODE
     // I am hungry
     // try to get fork
      // I am hungry
      state_condvar[i]=HUNGRY; 
      // try to get fork
      phi_test_condvar(i); 
      while (state_condvar[i] != EATING) {
          cond_wait(&mtp->cv[i]);
      }
//--------leave routine in monitor--------------
	up(&(mtp->mutex));
}
Esempio n. 5
0
void phi_take_forks_condvar(int i) {
     down(&(mtp->mutex));
//--------into routine in monitor--------------
     // LAB7 EXERCISE1: 2013011371
     // I am hungry
     // try to get fork
     state_condvar[i] = HUNGRY;
     phi_test_condvar(i);
     while (state_condvar[i] != EATING){
    	 cond_wait(&mtp->cv[i]);
     }
//--------leave routine in monitor--------------
      if(mtp->next_count>0)
         up(&(mtp->next));
      else
         up(&(mtp->mutex));
}
Esempio n. 6
0
void phi_take_forks_condvar(int i) {
     down(&(mtp->mutex));
//--------into routine in monitor--------------
     // LAB7 EXERCISE1: 2012011384
     // I am hungry
     state_condvar[i]=HUNGRY;
     // try to get fork
     phi_test_condvar(i); 
     while (state_condvar[i] != EATING) {
          cprintf("phi_take_forks_condvar: %d didn't get fork and will wait\n",i);
          cond_wait(&mtp->cv[i]);
      }
//--------leave routine in monitor--------------
      if(mtp->next_count>0)
         up(&(mtp->next));
      else
         up(&(mtp->mutex));
}
Esempio n. 7
0
void phi_take_forks_condvar(int i) {
	down(&(mtp->mutex));
//--------into routine in monitor--------------
	// LAB7 EXERCISE1: 2009011419
	// I am hungry
	state_condvar[i] = HUNGRY;
	// try to get fork
	phi_test_condvar(i);
	if (state_condvar[i] != EATING) {
		cond_wait(&mtp->cv[i]);
	}
//--------leave routine in monitor--------------
	if (mtp->next_count > 0) {
		up(&(mtp->next));
	} else {
		up(&(mtp->mutex));
	}
}
Esempio n. 8
0
void phi_take_forks_condvar(int i) {
     down(&(mtp->mutex));
//--------into routine in monitor--------------
     // LAB7 EXERCISE1: YOUR CODE
     // I am hungry
     state_condvar[i] = HUNGRY;
     // try to get fork
     phi_test_condvar(i);
     while(state_condvar[i] != EATING) {
        cprintf("philosopher %d fails to take fork and will wait. \n");
        cond_wait(& (mtp -> cv[i]));
     }
//--------leave routine in monitor--------------
      if(mtp->next_count>0)
         up(&(mtp->next));
      else
         up(&(mtp->mutex));
}
Esempio n. 9
0
void phi_take_forks_condvar(int i) {
     down(&(mtp->mutex)); //进入管程
     //--------into routine in monitor--------------
     // LAB7 EXERCISE1: 2012011364
     // I am hungry
     state_condvar[i] = HUNGRY;
     // try to get fork
     phi_test_condvar(i);
     //--------leave routine in monitor--------------
     if ( state_condvar[i] != EATING) { //取刀叉失败时

    	 cond_wait(&mtp->cv[i]); //等待条件变量

     }
      if(mtp->next_count>0)
         up(&(mtp->next));
      else
         up(&(mtp->mutex));
}