/* thread-safe */
static bool AddNativeMapping(IntPtr native, ScriptObject obj)
{
ScriptObjectToggleRef tref;
if (native == IntPtr.Zero)
{
return(false);
}
lock (toggleRefs) {
if (toggleRefs.ContainsKey(native))
{
#if DEBUG
throw new ExecutionEngineException("multiple mappings registered for the same NPObject peer");
#else
Console.WriteLine("multiple mappings registered for the same NPObject peer 0x{0:x}, type = {1}", native, obj.GetType());
Console.WriteLine(Environment.StackTrace);
return(false);
#endif
}
tref = new ScriptObjectToggleRef(obj);
toggleRefs[native] = tref;
}
tref.Initialize();
return(true);
}
internal static ScriptObject LookupScriptObject(IntPtr obj_handle)
{
ScriptObject obj = null;
ScriptObjectToggleRef tref = null;
WeakReference wref = null;
lock (toggleRefs) {
toggleRefs.TryGetValue(obj_handle, out tref);
}
if (tref != null)
{
obj = tref.Target;
}
else
{
lock (cachedObjects) {
cachedObjects.TryGetValue(obj_handle, out wref);
if (wref != null)
{
if (wref.IsAlive)
{
obj = wref.Target as ScriptObject;
}
else
{
cachedObjects.Remove(obj_handle);
}
}
}
}
return(obj);
}
/* thread-safe */
static void FreeNativeMapping(ScriptObject obj)
{
ScriptObjectToggleRef tref = null;
IntPtr native = obj.Handle;
if (native == IntPtr.Zero)
{
return;
}
toggleRefs.TryGetValue(native, out tref);
if (tref != null)
{
tref.Free();
toggleRefs.Remove(native);
}
GC.SuppressFinalize(obj);
}
