async Task Synchronize(ModelRepresentation targetRep, bool dataLocked)
{
ModelRepresentation sourceModel = null;
int currentChangeVersion;
lock (changeLock) {
sourceModel = lastChangedRepresentation;
currentChangeVersion = changeVersion;
}
if (targetRep.CurrentVersion == currentChangeVersion || sourceModel == null || sourceModel == targetRep)
{
return; // Not changed
}
try {
// Any operation that requires the lock of several representation must take
// the model lock first, to avoid deadlocks
if (!dataLocked)
{
await dataLock.WaitAsync();
await targetRep.WaitHandle.WaitAsync();
await sourceModel.WaitHandle.WaitAsync();
}
await targetRep.InternalCopyFrom(sourceModel);
} finally {
if (!dataLocked)
{
dataLock.Release();
targetRep.WaitHandle.Release();
sourceModel.WaitHandle.Release();
}
}
RaiseChangedEvent(targetRep.GetType());
}
