public Task Subscribe(object owner, Func <Task> callback)
{
lock (_mutex)
{
_handlers += (owner, callback);
}
return(callback());
}
public AsyncEvent(T initValue = default(T))
{
_handlers = new ContextMulticastFuncTask <T>();
// by default, on subscribe we notify with the latest value
_onSubscribe = async(cb) =>
{
await cb(LatestValue);
};
LatestValue = initValue;
}
public Task Unsubscribe(object owner, Func <Task> callback = null)
{
if (callback == null)
{
lock (_mutex)
{
_handlers -= owner;
}
}
else
{
lock (_mutex)
{
_handlers -= (owner, callback);
}
}
return(Tasks.Empty);
}
public AsyncEvent()
{
_handlers = new ContextMulticastFuncTask();
}
