internal static void RemoveEventHandler <T>(Action <EventRegistrationToken> removeMethod, T handler)
{
object instanceKey = WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.GetInstanceKey(removeMethod);
WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.s_eventCacheRWLock.AcquireReaderLock(-1);
EventRegistrationToken token;
try
{
WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.TokenListCount tokenListCount;
ConditionalWeakTable <object, WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.EventRegistrationTokenListWithCount> tokenTableNoCreate = WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.GetEventRegistrationTokenTableNoCreate(instanceKey, removeMethod, out tokenListCount);
if (tokenTableNoCreate == null)
{
return;
}
lock (tokenTableNoCreate)
{
WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.EventRegistrationTokenListWithCount local_6;
object local_7 = tokenTableNoCreate.FindEquivalentKeyUnsafe((object)handler, out local_6);
if (local_6 == null)
{
return;
}
if (!local_6.Pop(out token))
{
tokenTableNoCreate.Remove(local_7);
}
}
}
finally
{
WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.s_eventCacheRWLock.ReleaseReaderLock();
}
removeMethod(token);
}
public static TKey FindEquivalentKeyUnsafe <TKey, TValue>(
this ConditionalWeakTable <TKey, TValue> table,
TKey key,
out TValue value
)
where TKey : class
where TValue : class
{
return(table.FindEquivalentKeyUnsafe(key, out value));
}
/// <summary>
/// Given a key, locate the corresponding value in the ConditionalWeakTable according to value
/// equality. Will create a new value if the key is not found.
/// <summary>
public static TValue GetValueFromEquivalentKey <TKey, TValue>(ConditionalWeakTable <TKey, TValue> table, TKey key, ConditionalWeakTable <TKey, TValue> .CreateValueCallback callback)
where TKey : class
where TValue : class
{
TValue value;
TKey foundKey = table.FindEquivalentKeyUnsafe(key, out value);
if (foundKey == default(TKey))
{
value = callback(key);
table.Add(key, value);
}
return(value);
}
internal static EventHandler <object> GetValueFromEquivalentKey(
ConditionalWeakTable <EventHandler, EventHandler <object> > table,
EventHandler key,
ConditionalWeakTable <EventHandler, EventHandler <object> > .CreateValueCallback callback)
{
EventHandler <object> value;
// Find the key in the table using a value check rather than an instance check.
EventHandler existingKey = table.FindEquivalentKeyUnsafe(key, out value);
if (existingKey == null)
{
value = callback(key);
table.Add(key, value);
}
return(value);
}
internal static void AddEventHandler <T>(Func <T, EventRegistrationToken> addMethod, Action <EventRegistrationToken> removeMethod, T handler)
{
object instanceKey = WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.GetInstanceKey(removeMethod);
EventRegistrationToken token = addMethod(handler);
bool flag = false;
try
{
WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.s_eventCacheRWLock.AcquireReaderLock(-1);
try
{
WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.TokenListCount tokenListCount;
ConditionalWeakTable <object, WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.EventRegistrationTokenListWithCount> registrationTokenTable = WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.GetOrCreateEventRegistrationTokenTable(instanceKey, removeMethod, out tokenListCount);
lock (registrationTokenTable)
{
WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.EventRegistrationTokenListWithCount local_3;
if (registrationTokenTable.FindEquivalentKeyUnsafe((object)handler, out local_3) == null)
{
local_3 = new WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.EventRegistrationTokenListWithCount(tokenListCount, token);
registrationTokenTable.Add((object)handler, local_3);
}
else
{
local_3.Push(token);
}
flag = true;
}
}
finally
{
WindowsRuntimeMarshal.NativeOrStaticEventRegistrationImpl.s_eventCacheRWLock.ReleaseReaderLock();
}
}
catch (Exception ex)
{
if (!flag)
{
removeMethod(token);
}
throw;
}
}
internal static EventHandler<object> GetValueFromEquivalentKey(
ConditionalWeakTable<EventHandler, EventHandler<object>> table,
EventHandler key,
ConditionalWeakTable<EventHandler, EventHandler<object>>.CreateValueCallback callback)
{
EventHandler<object> value;
// Find the key in the table using a value check rather than an instance check.
EventHandler existingKey = table.FindEquivalentKeyUnsafe(key, out value);
if (existingKey == null)
{
value = callback(key);
table.Add(key, value);
}
return value;
}
