* Added CreateChild().

* Added Publish/UnpublishDevice(). Not implemented yet.
* small fixes


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3479 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KPartition.h

@@ -31,12 +31,14 @@ public:
 
 	// Reference counting. As long as there's at least one referrer, the
 	// object won't be deleted.
-	// manager must be locked
+	// manager must be locked (Unregister() locks itself)
 	void Register();
 	void Unregister();
 	int32 CountReferences() const;
 
 	status_t Open(int flags, int *fd);
+	status_t PublishDevice();
+	status_t UnpublishDevice();
 
 	void SetBusy(bool busy);
 	bool IsBusy() const;
@@ -118,6 +120,8 @@ public:
 	KPartition *Parent() const;
 
 	status_t AddChild(KPartition *partition, int32 index = -1);
+	status_t CreateChild(partition_id id, int32 index,
+						 KPartition **child = NULL);
 	KPartition *RemoveChild(int32 index);
 	KPartition *ChildAt(int32 index) const;
 	int32 CountChildren() const;

src/kernel/core/disk_device_manager/KPartition.cpp

@@ -70,6 +70,7 @@ KPartition::Register()
 void
 KPartition::Unregister()
 {
+	ManagerLocker locker(KDiskDeviceManager::Default());
 	fReferenceCount--;
 }
 
@@ -98,6 +99,22 @@ KPartition::Open(int flags, int *fd)
 	return B_OK;
 }
 
+// PublishDevice
+status_t
+KPartition::PublishDevice()
+{
+	// not implemented
+	return B_ERROR;
+}
+
+// UnpublishDevice
+status_t
+KPartition::UnpublishDevice()
+{
+	// not implemented
+	return B_ERROR;
+}
+
 // SetBusy
 void
 KPartition::SetBusy(bool busy)
@@ -339,6 +356,8 @@ KPartition::ID() const
 int32
 KPartition::ChangeCounter() const
 {
+	// not implemented
+	return 0;
 }
 
 // GetPath
@@ -486,6 +505,29 @@ KPartition::AddChild(KPartition *partition, int32 index)
 	return B_ERROR;
 }
 
+// CreateChild
+status_t
+KPartition::CreateChild(partition_id id, int32 index, KPartition **_child)
+{
+	// check parameters
+	int32 count = fPartitionData.child_count;
+	if (index == -1)
+		index = count;
+	if (index < 0 || index > count)
+		return B_BAD_VALUE;
+	// create and add partition
+	KPartition *child = new(nothrow) KPartition(id);
+	if (!child)
+		return B_NO_MEMORY;
+	status_t error = AddChild(child, index);
+	// cleanup / set result
+	if (error != B_OK)
+		delete child;
+	else if (_child)
+		*_child = child;
+	return error;
+}
+
 // RemoveChild
 KPartition *
 KPartition::RemoveChild(int32 index)