public int Drain(Action <T> act, int limit)
{
long consumerIndex;
long pIndex;
for (var i = 0; i < limit; i++)
{
do
{
pIndex = this.producerIndex.VolatileRead();
consumerIndex = this.consumerIndex.VolatileRead();
if (consumerIndex >= pIndex)
{
return(i);
}
} while (!buffer.HasValue(consumerIndex) ||
!this.consumerIndex.CompareExchange(
consumerIndex + 1,
consumerIndex));
var success = this.buffer.TryGet(consumerIndex, out T value);
Debug.Assert(success, "Did not successfully get the value in a drain");
act(value);
success = this.buffer.Clear(consumerIndex);
Debug.Assert(success, "Unable to clear the value on a drain");
}
return(limit);
}
public bool TryPoll(out T value)
{
long pIndex;
long consumerIndex;
do
{
pIndex = this.producerIndex.VolatileRead();
consumerIndex = this.consumerIndex.VolatileRead();
if (consumerIndex >= pIndex)
{
value = default(T);
return(false);
}
} while (!this.buffer.HasValue(consumerIndex) || !this.consumerIndex.CompareExchange(consumerIndex + 1, consumerIndex));
var get = this.buffer.TryGet(consumerIndex, out value);
this.buffer.Clear(consumerIndex);
Debug.Assert(get, $"Failed to get the value. {consumerIndex}");
return(true);
}
public bool Offer(T value)
{
var capacity = this.buffer.Length;
long pIndex;
long consumerIndex;
do
{
pIndex = this.producerIndex.VolatileRead();
consumerIndex = this.consumerIndex.VolatileRead();
if (pIndex - capacity >= consumerIndex)
{
return(false);
}
} while (!this.buffer.IsEmpty(pIndex) || // Need to go around again if a value is still at that position.
!this.producerIndex.CompareExchange(pIndex + 1, pIndex));
var set = this.buffer.Set(pIndex, value);
Debug.Assert(set, $"Did not find an open position correctly {pIndex}");
return(true);
}