public void Relocate(NonSafeDinnerPlace from, int amountOfFood)
{
Table -= amountOfFood;
from.Table += amountOfFood;
}
public void DepositWithdrawTestWithMutex()
{
var tasks = new List <Task>();
var table = new NonSafeDinnerPlace();
var coach = new NonSafeDinnerPlace();
var tableMutex = new Mutex();
var coachMutex = new Mutex();
for (int i = 0; i < 10; i++)
{
tasks.Add(Task.Factory.StartNew(() =>
{
for (int j = 0; j < 1000; j++)
{
bool haveTableLock = tableMutex.WaitOne();
try
{
table.Place(1);
}
finally
{
if (haveTableLock)
{
tableMutex.ReleaseMutex();
}
}
}
}));
tasks.Add(Task.Factory.StartNew(() =>
{
for (int j = 0; j < 2000; j++)
{
bool haveCoachLock = coachMutex.WaitOne();
try
{
coach.EatFrom(1);
}
finally
{
if (haveCoachLock)
{
coachMutex.ReleaseMutex();
}
}
}
}));
tasks.Add(Task.Factory.StartNew(() =>
{
for (int j = 0; j < 1000; j++)
{
bool haveTransferLock = WaitHandle.WaitAll(new [] { tableMutex, coachMutex });
try
{
table.Relocate(coach, 1);
}
finally
{
if (haveTransferLock)
{
tableMutex.ReleaseMutex();
coachMutex.ReleaseMutex();
}
}
}
}));
}
Task.WaitAll(tasks.ToArray());
Assert.True(table.Table == 0);
Assert.True(coach.Table == 0);
}