/// <summary>
/// Registers the specified instance with the dictionary.
/// </summary>
internal static void RegisterHandle(IntPtr handle, SKObject instance)
{
if (handle == IntPtr.Zero || instance == null)
{
return;
}
SKObject objectToDispose = null;
instancesLock.EnterWriteLock();
try {
if (instances.TryGetValue(handle, out var oldValue) && oldValue.Target is SKObject obj && !obj.IsDisposed)
{
#if THROW_OBJECT_EXCEPTIONS
if (obj.OwnsHandle)
{
// a mostly recoverable error
// if there is a managed object, then maybe something happened and the native object is dead
throw new InvalidOperationException(
$"A managed object already exists for the specified native object. " +
$"H: {handle.ToString ("x")} Type: ({obj.GetType ()}, {instance.GetType ()})");
}
#endif
// this means the ownership was handed off to a native object, so clean up the managed side
objectToDispose = obj;
}
instances[handle] = new WeakReference(instance);
} finally {
instancesLock.ExitWriteLock();
}
// dispose the object we just replaced
objectToDispose?.DisposeInternal();
}
