public bool TryAdd(TKey key, object obj)
{
// prefer reader
//var incr = Interlocked.Increment(ref _locker);
//if (incr != 1L)
{
var sw = new SpinWait();
while (true)
{
var existing = Interlocked.CompareExchange(ref _locker, 1, 0);
if (existing == 0)
{
break;
}
sw.SpinOnce();
//if (sw.NextSpinWillYield)
//{
// sw.Reset();
//}
}
}
var h = GCHandle.Alloc(obj, GCHandleType.Weak);
var added = _inner.TryAdd(key, h);
if (!added)
{
h.Free();
}
Volatile.Write(ref _locker, 0L);
return(added);
}
