Made KPartition abstract and derived two classes, KPhysicalPartition

and KShadowPartition from it. KPhysicalPartition represents a partition
that exists on-disk, while KShadowPartition is a partition edited by the
API user, but not yet written to disk. Related changes in other classes.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3851 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KShadowPartition.h

@@ -0,0 +1,41 @@
+// KPartition.h
+
+#ifndef _K_DISK_DEVICE_SHADOW_PARTITION_H
+#define _K_DISK_DEVICE_SHADOW_PARTITION_H
+
+#include "KPartition.h"
+
+namespace BPrivate {
+namespace DiskDevice {
+
+class KPhysicalPartition;
+
+class KShadowPartition : public KPartition {
+public:
+	KShadowPartition(KPhysicalPartition *physicalPartition);
+	virtual ~KShadowPartition();
+
+	// Hierarchy
+
+	virtual status_t CreateChild(partition_id id, int32 index,
+								 KPartition **child = NULL);
+
+	// Shadow Partition
+
+	virtual KShadowPartition *ShadowPartition();
+	virtual bool IsShadowPartition() const;
+	void SetPhysicalPartition(KPhysicalPartition *partition);
+	virtual KPhysicalPartition *PhysicalPartition();
+
+	virtual void Dump(bool deep, int32 level);
+
+protected:
+	KPhysicalPartition	*fPhysicalPartition;
+};
+
+} // namespace DiskDevice
+} // namespace BPrivate
+
+using BPrivate::DiskDevice::KShadowPartition;
+
+#endif	// _K_DISK_DEVICE_SHADOW_PARTITION_H