private LockingDictionary <StorageKey, ObjectDecorator> GetSingleKeySpace(DataBuffer keySpace)
{
var hash = keySpace.GetHashCode();
LockingDictionary <StorageKey, ObjectDecorator> keySpaceDct;
// upgradeable blocks other upgradeable, so try read first
using (_keySpaces.Lock(LockType.Read))
{
if (_keySpaces.TryGetValue(hash, out keySpaceDct))
{
return(keySpaceDct);
}
}
// didn't find it, so now try upgradeable to write if need be
using (_keySpaces.Lock(LockType.ReadUpgradable))
{
if (!_keySpaces.TryGetValue(hash, out keySpaceDct))
{
using (_keySpaces.Lock(LockType.Write))
{
keySpaceDct = new LockingDictionary <StorageKey, ObjectDecorator>();
_keySpaces.Add(hash, keySpaceDct);
}
}
return(keySpaceDct);
}
}
public void TestLockedSet()
{
var ld = new LockingDictionary <int, string>().Locked;
Assert.ThrowsException <NotSupportedException>(() => ld[0] = "zero");
Assert.ThrowsException <NotSupportedException>(() => ld.Add(0, "zero"));
Assert.ThrowsException <NotSupportedException>(() => ld.Clear());
Assert.ThrowsException <NotSupportedException>(() => ld.Remove(1));
}
public void TestLockedGet()
{
var ld = new LockingDictionary <int, string>
{
[1] = "one",
[2] = "two"
};
ld.Add(10, "ten");
_TestDictionary(ld.Locked);
}
public void TestParentReferenceStability()
{
var ld = new LockingDictionary <int, string>
{
[1] = "one",
[2] = "two"
};
var locked = ld.Locked;
ld[2] = "Two!";
ld.Add(4, "Four?");
Assert.IsTrue(locked.ContainsKey(4));
Assert.AreEqual("Two!", ld[2]);
}