internal bool Contains(object x, object y)
{
if (!IsReferencePair(x, y))
{
return(false);
}
using (var pair = ReferencePair.GetOrCreate(x, y))
{
return(this.pairs.Contains(pair));
}
}
public bool Equals(ReferencePair other)
{
Debug.Assert(!this.disposed, "this.disposed");
if (ReferenceEquals(null, other))
{
return(false);
}
if (ReferenceEquals(this, other))
{
return(true);
}
return(ReferenceEquals(this.X, other.X) && ReferenceEquals(this.Y, other.Y));
}
internal bool?Add(object x, object y)
{
if (!IsReferencePair(x, y))
{
return(null);
}
var refCounted = ReferencePair.GetOrCreate(x, y);
var added = this.pairs.Add(refCounted);
if (!added)
{
refCounted.Dispose();
}
return(added);
}
internal static IRefCounted <TValue> GetOrAdd <TKey, TValue>(
TKey x,
TKey y,
MemberSettings settings,
ConditionalWeakTable <IRefCounted <ReferencePair>, TValue> .CreateValueCallback creator,
out bool created)
where TKey : class
where TValue : class, IDisposable
{
var refCounted = ReferencePair.GetOrCreate(x, y);
var value = GetOrAdd(refCounted, settings, creator, out created);
if (!created)
{
refCounted.Dispose();
}
return(value);
}
public static IRefCounted <ReferencePair> GetOrCreate <T>(T x, T y)
where T : class
{
var key = new ReferencePair(x, y);
if (!Cache.GetOrAdd(key, p => p).TryRefCount(out var refcounted))
{
if (!Cache.TryAdd(key, key))
{
throw Throw.ShouldNeverGetHereException("Adding created pair failed");
}
if (!key.TryRefCount(out refcounted))
{
throw Throw.ShouldNeverGetHereException("Refcounting created pair failed");
}
}
return(refcounted);
}
private bool Equals(ReferencePair x, ReferencePair y)
{
return(ReferenceEquals(x.X, y.X) && ReferenceEquals(x.Y, y.Y));
}