public static void SpinLockDemo()
{
var tasks = new List <Task>();
var ba = new BankAccount();
// spinning avoid overhead of resheduling
// useful if you expect the wait time to be very short
SpinLock sl = new SpinLock();
// owner tracking keeps a record of which thread acquired it to improve debugging
for (int i = 0; i < 10; ++i)
{
tasks.Add(Task.Factory.StartNew(() =>
{
for (int j = 0; j < 1000; ++j)
{
bool lockTaken = false;
try
{
// sl.IsHeld
// sl.IsHeldByCurrentThread
sl.Enter(ref lockTaken);
ba.Deposit(100);
}
finally
{
if (lockTaken)
{
sl.Exit();
}
}
}
}));
tasks.Add(Task.Factory.StartNew(() =>
{
for (int j = 0; j < 1000; ++j)
{
bool lockTaken = false;
try
{
sl.Enter(ref lockTaken);
ba.Withdraw(100);
}
finally
{
if (lockTaken)
{
sl.Exit();
}
}
}
}));
}
Task.WaitAll(tasks.ToArray());
Console.WriteLine($"Final balance is {ba.Balance}.");
}
