NodeLocker
NodeLocker(FUSEVolume* volume, FUSENode* node, bool parent, bool writeLock)
struct FUSEVolume::NodeReadLocker : NodeLocker {
NodeLocker(volume, node, parent, false)
struct FUSEVolume::NodeWriteLocker : NodeLocker {
NodeLocker(volume, node, parent, true)
struct NodeLocker;
friend struct NodeLocker;