/// <summary>
/// Performs an atomic add into an Immutable Hash Set
/// </summary>
/// <param name="hashSet">The location of the hash set to add to</param>
/// <param name="item">The item to add</param>
/// <returns>True if the item was added, or False if it was already in the set</returns>
public static bool Add <T>(ref ImmutableHashSet <T> hashSet, T item)
{ //****************************************
ImmutableHashSet <T> OldSet, NewSet;
//****************************************
do
{
OldSet = hashSet;
NewSet = OldSet.Add(item);
if (object.ReferenceEquals(OldSet, NewSet))
{
return(false);
}
} while (Interlocked.CompareExchange(ref hashSet, NewSet, OldSet) != OldSet);
return(true);
}
