public void RingBuffer_SingleItemPush()
{
var rb = new SingleConsumerRingBuffer <long>(3);
long item = 910;
Assert.True(rb.TryPush(ref item));
Assert.True(rb.TryPush(ref item));
Assert.True(rb.TryPush(ref item));
Assert.True(rb.TryPush(ref item));
Assert.False(rb.TryPush(ref item));
var span = rb.Acquire();
Assert.Equal(4, span.Length);
Assert.Equal(910, span[0].Item);
Assert.Equal(910, span[1].Item);
Assert.Equal(910, span[2].Item);
Assert.Equal(910, span[3].Item);
item = 911;
Assert.False(rb.TryPush(ref item));
rb.Release();
Assert.True(rb.TryPush(ref item));
span = rb.Acquire();
Assert.Equal(1, span.Length);
Assert.Equal(911, span[0].Item);
rb.Release();
}
public void RingBuffer_MultipleAcquires_SingleRelease()
{
var rb = new SingleConsumerRingBuffer <long>(4);
long item = 910;
Assert.True(rb.TryPush(ref item));
Assert.True(rb.TryPush(ref item));
var span = rb.Acquire();
Assert.Equal(2, span.Length);
Assert.Equal(910, span[0].Item);
Assert.Equal(910, span[1].Item);
item = 911;
Assert.True(rb.TryPush(ref item));
Assert.True(rb.TryPush(ref item));
span = rb.Acquire();
Assert.Equal(2, span.Length);
Assert.Equal(911, span[0].Item);
Assert.Equal(911, span[1].Item);
item = 912;
Assert.False(rb.TryPush(ref item));
rb.Release();
item = 912;
Assert.True(rb.TryPush(ref item));
}
public void RingBuffer_MultipleItemsSingleAcquirePush()
{
var rb = new SingleConsumerRingBuffer <long>(4);
long item = 910;
Assert.True(rb.TryPush(ref item));
item = 911;
Assert.True(rb.TryPush(ref item));
RingItem <long> ringItem;
Assert.True(rb.TryAcquireSingle(out ringItem));
Assert.Equal(910, ringItem.Item);
Assert.True(rb.TryAcquireSingle(out ringItem));
Assert.Equal(911, ringItem.Item);
item = 912;
Assert.True(rb.TryPush(ref item));
Assert.True(rb.TryPush(ref item));
Assert.False(rb.TryPush(ref item));
rb.Release();
item = 913;
Assert.True(rb.TryPush(ref item));
Assert.True(rb.TryAcquireSingle(out ringItem));
Assert.Equal(912, ringItem.Item);
Assert.True(rb.TryAcquireSingle(out ringItem));
Assert.Equal(912, ringItem.Item);
rb.Release();
Assert.True(rb.TryAcquireSingle(out ringItem));
Assert.Equal(913, ringItem.Item);
rb.Release();
}
public void RingBuffer_WhenEmptyAndSimultaneouslyTryPushAndTryAcquired_ShouldAcquiredLegal()
{
var rb = new SingleConsumerRingBuffer <TestItem>(4);
var acquiredEnd = new SingleUseFlag();
var finished = new Barrier(2);
var cancellation = new CancellationTokenSource();
var timeout = TimeSpan.FromSeconds(1);
var exceptions = new List <Exception>();
var pushTask = Task.Run(() =>
{
try
{
while (acquiredEnd.IsRaised() == false)
{
if (finished.SignalAndWait(timeout, cancellation.Token) == false)
{
break;
}
var testItem = new TestItem
{
TestProperty = finished.CurrentPhaseNumber
};
rb.TryPush(ref testItem);
}
}
catch (OperationCanceledException)
{
}
catch (Exception e)
{
exceptions.Add(e);
}
}, cancellation.Token);
try
{
for (var i = 0; i < 1000; i++)
{
if (finished.SignalAndWait(timeout) == false)
{
break;
}
for (int j = 0; j < 100; j++)
{
if (rb.TryAcquireSingle(out var ringItem))
{
Assert.NotNull(ringItem.Item);
Assert.True(ringItem.IsReady == 1, $"Acquired {ringItem.GetType()} should be set to ready");
break;
}
}
}
}
catch (Exception e)
{
exceptions.Add(e);
}
finally
{
cancellation.Cancel();
acquiredEnd.Raise();
try
{
pushTask.Wait(timeout);
}
catch (Exception e)
{
exceptions.Add(e);
}
cancellation.Dispose();
if (exceptions.Any())
{
throw new AggregateException(exceptions);
}
}
}
public bool Enqueue(T entry)
{
return(_buffer.TryPush(ref entry));
}