private CacheEntryStack(CacheEntryStack previous, CacheEntry entry)
{
if (previous == null)
{
throw new ArgumentNullException(nameof(previous));
}
_previous = previous;
_entry = entry;
}
internal static IDisposable EnterScope(CacheEntry entry)
{
CacheEntryStack scopes = GetOrCreateScopes();
var scopeLease = new ScopeLease(scopes);
Scopes = scopes.Push(entry);
return(scopeLease);
}
private static CacheEntryStack GetOrCreateScopes()
{
CacheEntryStack scopes = Scopes;
if (scopes == null)
{
scopes = CacheEntryStack.Empty;
Scopes = scopes;
}
return(scopes);
}
public ScopeLease(CacheEntryStack cacheEntryStack)
{
_cacheEntryStack = cacheEntryStack;
}