* Implemented what was left to do for KDiskDevice and KPartition

management regarding removal and deletion of objects.
* Fixed the file disk system related stuff. KFileDiskSystem now uses the
  virtualdrive driver. The former method was seemed simple and brilliant,
  but the B_SET_PARTITION ioctl wouldn't work.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3650 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KDiskDevice.h

@@ -36,8 +36,10 @@ public:
 	// manager lock owners can be sure, that it won't change.
 	bool ReadLock();
 	void ReadUnlock();
+	bool IsReadLocked(bool orWriteLocked = true);
 	bool WriteLock();
 	void WriteUnlock();
+	bool IsWriteLocked();
 
 	virtual void SetID(partition_id id);