private static XChannel AddXChannel(LinkedList <XChannel> list, ChannelIdentification identification, object?targetId, bool exclusiveChannel, IWeakDelegate weakDelegate)
{ // lock (cs) required.
if (exclusiveChannel)
{
if (list.Count > 0)
{ // other channel already exists.
throw new InvalidOperationException();
}
}
else
{
if (list.First?.Value.ExclusiveChannel == true)
{ // Exclusive channel exists.
throw new InvalidOperationException();
}
}
// New XChannel
var channel = new XChannel(identification, targetId, exclusiveChannel, weakDelegate);
// list: Identification to XChannels.
channel.Node = list.AddLast(channel);
return(channel);
}
public XChannel(ChannelIdentification channelIdentification, object?targetId, bool exclusiveChannel, IWeakDelegate weakDelegate)
{
this.Identification = channelIdentification;
this.TargetId = targetId;
this.ExclusiveChannel = exclusiveChannel;
this.WeakDelegate = weakDelegate;
}
public static XChannel Open <TMessage, TResult>(Func <TMessage, TResult> method, object?targetId = null, bool exclusiveChannel = false)
{
XChannel channel;
var identification = new ChannelIdentification(typeof(TMessage), typeof(TResult));
lock (cs)
{
var list = Cache_WeakFunction <TMessage, TResult> .List;
channel = AddXChannel(list, identification, targetId, exclusiveChannel, new WeakFunc <TMessage, TResult>(method));
CleanupList(list);
}
return(channel);
}
public static XChannel Open <TMessage>(object?weakReference, Action <TMessage> method, object?targetId = null, bool exclusiveChannel = false)
{
XChannel channel;
var identification = new ChannelIdentification(typeof(TMessage));
lock (cs)
{
var list = Cache_WeakAction <TMessage> .List;
channel = AddXChannel(list, identification, targetId, exclusiveChannel, new WeakAction <TMessage>(weakReference, method));
CleanupList(list);
}
return(channel);
}