/// <summary>
/// Attempt to put an item (either a real CLR objecr or a "virtual"
/// item) into the <see cref="BoundedBuffer"/>.
/// </summary>
/// <param name="producer">
/// The <see cref="BufferPut"/> DesTask.
/// </param>
/// <param name="item">
/// The object to put into the <see cref="BoundedBuffer"/>.
/// </param>
/// <param name="useItem">
/// <b>true</b> if the <paramref name="item"/> parameter should be used.
/// </param>
/// <returns>
/// <b>true</b> if <paramref name="producer"/> was blocked.
/// </returns>
private bool PutObject(BufferPut producer, object item, bool useItem)
{
bool blocked = Count >= Capacity;
if (blocked)
{
if (_producerQ == null)
{
_producerQ = CreateBlockingQueue(ProducerQueueId);
}
_producerQ.Enqueue(producer);
}
else
{
if (useItem)
{
if (_items == null)
{
_items = new React.Queue.FifoQueue <object>();
}
_items.Enqueue(item);
}
else
{
_count++;
}
producer.Activate(this);
ResumeWaitingConsumers();
}
return(blocked);
}
/// <summary>
/// Attempt to resume as many waiting producer <see cref="DesTask"/>s as
/// possible.
/// </summary>
protected void ResumeWaitingProducers()
{
while (Count < Capacity && GetBlockCount(ProducerQueueId) > 0)
{
BufferPut task = (BufferPut)_producerQ.Dequeue();
if (!task.Canceled && task.Client != null)
{
if (task.Item == null)
{
PutObject(task);
}
else
{
PutObject(task, task.Item);
}
}
}
}
/// <summary>
/// Called by the <see cref="BufferPut"/> DesTask and the
/// <see cref="ResumeWaitingProducers"/> method to put an
/// object into the buffer.
/// </summary>
/// <param name="producer">
/// The <see cref="BufferPut"/> DesTask.
/// </param>
/// <param name="item">
/// The object to put into the <see cref="BoundedBuffer"/>.
/// </param>
/// <returns>
/// <b>true</b> if <paramref name="producer"/> was blocked.
/// </returns>
internal bool PutObject(BufferPut producer, object item)
{
return(PutObject(producer, item, true));
}
/// <summary>
/// Called by the <see cref="BufferPut"/> DesTask and the
/// <see cref="ResumeWaitingProducers"/> method to put a
/// counted item into the buffer.
/// </summary>
/// <param name="producer">
/// The <see cref="BufferPut"/> DesTask.
/// </param>
/// <returns>
/// <b>true</b> if <paramref name="producer"/> was blocked.
/// </returns>
internal bool PutObject(BufferPut producer)
{
return(PutObject(producer, null, false));
}
