//define neighbors and give/take chopsticks actions on both sides
public void Initialize()
{
Philosopher pContenderL = cMyLeft.Contender(this); //Philosopher on the left
Philosopher pContenderR = cMyRight.Contender(this); //Philosopher on the right
pContenderL.Request += GiveChopstick; //ask for and give both chopsticks
pContenderR.Request += GiveChopstick;
pContenderL.Release += TakeChopstick;
pContenderR.Release += TakeChopstick;
}
//Responds to a request for the chopstick
void GiveChopstick(Chopstick chopstick)
{
if (chopstick.pHasIt != this)
{
return; //doesn't have it
}
if (chopstick.bDirty) //used - philosopher has eaten (or initial state) - will give it
{
Console.WriteLine("{0} accepted request for chopstick number {1} from {2}", sName, chopstick.nChopstickID, chopstick.Contender(this).sName);
lock (chopstick)
{
chopstick.bDirty = false;
chopstick.pHasIt = null;
}
Release(chopstick, chopstick.Contender(this));
}
else //clean - decline, but will note the request
{
Console.WriteLine("{0} declined request for chopstick number {1} from {2}", sName, chopstick.nChopstickID, chopstick.Contender(this).sName);
if (chopstick == cMyLeft)
{
cGiveToL = chopstick; //note that it was asked for
}
else
{
cGiveToR = chopstick;
}
}
}
//Philosopher takes the chopstick
void TakeChopstick(Chopstick chopstick, Philosopher pWho)
{
if (pWho != this) return;
if (chopstick == cMyLeft) cTakeFromL = null; //have taken it
else cTakeFromR = null;
lock (chopstick)
{
chopstick.pHasIt = this; //it's mine
}
Console.WriteLine("{0} takes chopstick number {1} from {2} and has {3} chopstick(s)", sName, chopstick.nChopstickID, chopstick.Contender(this).sName, HaveChopsticks());
}
//Responds to a request for the chopstick
void GiveChopstick(Chopstick chopstick)
{
if (chopstick.pHasIt != this) return; //doesn't have it
if (chopstick.bDirty) //used - philosopher has eaten (or initial state) - will give it
{
Console.WriteLine("{0} accepted request for chopstick number {1} from {2}", sName, chopstick.nChopstickID, chopstick.Contender(this).sName);
lock (chopstick)
{
chopstick.bDirty = false;
chopstick.pHasIt = null;
}
Release(chopstick, chopstick.Contender(this));
}
else //clean - decline, but will note the request
{
Console.WriteLine("{0} declined request for chopstick number {1} from {2}", sName, chopstick.nChopstickID, chopstick.Contender(this).sName);
if (chopstick == cMyLeft) cGiveToL = chopstick; //note that it was asked for
else cGiveToR = chopstick;
}
}
//Philosopher takes the chopstick
void TakeChopstick(Chopstick chopstick, Philosopher pWho)
{
if (pWho != this)
{
return;
}
if (chopstick == cMyLeft)
{
cTakeFromL = null; //have taken it
}
else
{
cTakeFromR = null;
}
lock (chopstick)
{
chopstick.pHasIt = this; //it's mine
}
Console.WriteLine("{0} takes chopstick number {1} from {2} and has {3} chopstick(s)", sName, chopstick.nChopstickID, chopstick.Contender(this).sName, HaveChopsticks());
}
