Headers for the disk device manager. Very early state.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3454 a95241bf-73f2-0310-859d-f6bbb57e9c96
2003-06-09 23:04:54 +00:00
parent bef8916ea6
commit 4c212afefb
12 changed files with 1047 additions and 0 deletions
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+// KDiskDevice.h
+
+#ifndef _K_DISK_DEVICE_H
+#define _K_DISK_DEVICE_H
+
+#include <OS.h>
+
+#include "KPartition.h"
+
+namespace BPrivate {
+namespace DiskDevice {
+
+class KDiskDevice : public KPartition {
+	KDiskDevice(partition_id id = -1);
+	virtual ~KDiskDevice();
+
+	// A read lock owner can be sure that the device (incl. all of its
+	// partitions won't be changed).
+	// A write lock owner is moreover allowed to make changes.
+	// The hierarchy is additionally protected by the disk device manager's
+	// lock -- only a device write lock owner is allowed to change it, but
+	// manager lock owners can be sure, that it won't change.
+	bool ReadLock();
+	void ReadUnlock();
+	bool WriteLock();
+	void WriteUnlock();
+
+	void SetDeviceFlags(uint32 flags);	// comprises the ones below
+	uint32 DeviceFlags() const;
+	bool IsRemovable() const;
+	bool HasMedia() const;
+
+	status_t SetPath(const char *path);
+	virtual status_t GetPath(char *path) const;
+
+	// File descriptor: Set only from a kernel thread, valid only for
+	// kernel threads.
+	void SetFD(int fd);
+	int FD() const;
+
+	// access to C style device data
+	disk_device_data *DeviceData();
+	const disk_device_data *DeviceData() const;
+
+	virtual KPartition *CreateShadowPartition();
+
+	void SetShadowOwner(team_id team);
+	team_id ShadowOwner() const;
+};
+
+} // namespace DiskDevice
+} // namespace BPrivate
+
+using BPrivate::DiskDevice::KDiskDevice;
+
+#endif	// _K_DISK_DEVICE_H