public virtual object Request(CreationContext context, Func <CreationContext, Burden> creationCallback)
{
Burden burden;
using (rwlock.ForWriting())
{
if (!initialized)
{
Intitialize(creationCallback, context);
}
if (available.Count != 0)
{
burden = available.Pop();
context.AttachExistingBurden(burden);
}
else
{
burden = creationCallback.Invoke(context);
}
try
{
inUse.Add(burden.Instance, burden);
}
catch (NullReferenceException)
{
throw new PoolException("creationCallback didn't return a valid burden");
}
catch (ArgumentNullException)
{
throw new PoolException("burden returned by creationCallback does not have root instance associated with it (its Instance property is null).");
}
}
return(burden.Instance);
}