public void Lock()
{
if (!locked.CompareExchange(true, false))
{
SpinLock();
}
}
public void CompareExchange_Twice_SecondFalse()
{
var subject = new AtomicBool();
Assert.True(subject.CompareExchange(true, false));
Assert.False(subject.CompareExchange(true, false));
}
public void CompareExchange_Concurrent()
{
int accessedTimes = 0;
var gate = new object();
var evt = new ManualResetEvent(false);
AtomicBool subject = false;
Task[] tasks = Enumerable.Repeat(
Task.Run(
() =>
{
lock (gate)
{
evt.WaitOne();
}
if (subject.CompareExchange(true, false))
{
Interlocked.Increment(ref accessedTimes);
}
}),
10)
.ToArray();
evt.Set();
Assert.True(Task.WaitAll(tasks, TimeSpan.FromSeconds(10)));
Assert.Equal(1, accessedTimes);
}
public void AtomicBoolTests_CompareExchangeTest()
{
var atomicBool = new AtomicBool();
var counter = 0;
var iterations = 100;
Parallel.For(0, iterations, (i) =>
{
while (!atomicBool.CompareExchange(false, true)) ;
++counter;
atomicBool.Value = false;
});
Assert.AreEqual(iterations, counter);
}
