public void VerifyBasicUsage()
{
IdleObjectGcHandle gchandle = new IdleObjectGcHandle(1);
gchandle.TryUse(false).Should().BeTrue();
gchandle.TryUse(true).Should().BeTrue();
gchandle.TryCollect().Should().BeFalse();
gchandle.Unuse(false);
gchandle.TryCollect().Should().BeFalse();
gchandle.Unuse(true);
gchandle.TryCollect().Should().BeFalse();
gchandle.TryUse(false).Should().BeTrue();
gchandle.Unuse(false);
gchandle.TryCollect().Should().BeFalse();
gchandle.TryCollect().Should().BeTrue();
}
public void VerifyUseUnuseCollect(int N)
{
// 1. Set MaxIdleCount for IdleObjectGcHandle to N.
// 2. Call TryUse Once.
// 3. Then perform interleaved TryUse and TryCollect N times, which should always result in true for TryUse and false for TryCollect.
// 4. Then perform interleaved Unuse and TryCollect N times, which should always result in false for TryCollect.
// 5. Call Unuse to un-use the object in step 1.
// 6. Then perform interleaved TryCollect N times, which should always result in false for TryCollect as its counting to maxIdleTicks.
// 7. Final call to TryCollect must return true.
IdleObjectGcHandle gchandle = new IdleObjectGcHandle(N);
gchandle.TryUse(false).Should().BeTrue();
List <Task> tasks = new List <Task>();
for (int i = 0; i < N; i++)
{
tasks.Add(Task.Run(() => Assert.True(gchandle.TryUse(false))));
tasks.Add(Task.Run(() => Assert.False(gchandle.TryCollect())));
}
Task.WaitAll(tasks.ToArray());
tasks.Clear();
for (int i = 0; i < N; i++)
{
tasks.Add(Task.Run(() => gchandle.Unuse(false)));
tasks.Add(Task.Run(() => Assert.False(gchandle.TryCollect())));
}
Task.WaitAll(tasks.ToArray());
tasks.Clear();
gchandle.Unuse(false);
for (int i = 0; i < N; i++)
{
tasks.Add(Task.Run(() => Assert.False(gchandle.TryCollect())));
}
Task.WaitAll(tasks.ToArray());
gchandle.TryCollect().Should().BeTrue();
}
public void VerifyUseUnuseCollectWithTimerCalls(int N)
{
// 1. Set MaxIdleCount for IdleObjectGcHandle to N.
// 2. Call TryUse Once.
// 3. Then perform interleaved TryUse, TryUse(forTimer) and TryCollect N times, which should always result in true for TryUse and false for TryCollect.
// 4. Then perform interleaved Unuse, UnUse(forTimer) and TryCollect N times, which should always result in false for TryCollect.
// 5. Call Unuse to un-use the object in step 1.
// 6. Then perform interleaved TryCollect N-1 times, which should always result in false for TryCollect as its counting to maxIdleTicks.
// 7. Then perform TryUse(for Timer) result in true for TryUse and false for TryUse
// 8. Then perform interleaved TryCollect N times, which should always result in false for TryCollect as its not counting towards GC because of use by a timer call.
// 9. Call UnUse to unuse object in step8.
// 10. Then perform TryCollect 1 times, which should result in false for TryCollect as its counting towards GC.
// 11. Final call to TryCollect must return true.
IdleObjectGcHandle gchandle = new IdleObjectGcHandle(N);
gchandle.TryUse(false).Should().BeTrue();
List <Task> tasks = new List <Task>();
for (int i = 0; i < N; i++)
{
tasks.Add(Task.Run(() => Assert.True(gchandle.TryUse(false))));
tasks.Add(Task.Run(() => Assert.True(gchandle.TryUse(true))));
tasks.Add(Task.Run(() => Assert.False(gchandle.TryCollect())));
}
Task.WaitAll(tasks.ToArray());
tasks.Clear();
for (int i = 0; i < N; i++)
{
tasks.Add(Task.Run(() => gchandle.Unuse(false)));
tasks.Add(Task.Run(() => gchandle.Unuse(true)));
tasks.Add(Task.Run(() => Assert.False(gchandle.TryCollect())));
}
Task.WaitAll(tasks.ToArray());
tasks.Clear();
gchandle.Unuse(false);
for (int i = 0; i < N - 1; i++)
{
tasks.Add(Task.Run(() => Assert.False(gchandle.TryCollect())));
}
Task.WaitAll(tasks.ToArray());
tasks.Clear();
gchandle.TryUse(true).Should().BeTrue();
for (int i = 0; i < N; i++)
{
tasks.Add(Task.Run(() => Assert.False(gchandle.TryCollect())));
}
Task.WaitAll(tasks.ToArray());
tasks.Clear();
gchandle.Unuse(true);
gchandle.TryCollect().Should().BeFalse();
Task.WaitAll(tasks.ToArray());
tasks.Clear();
gchandle.TryCollect().Should().BeTrue();
gchandle.IsGarbageCollected.Should().BeTrue();
}