Some changes to the interface (added missing methods and such). Implemented the class almost completely. Basically only the notification stuff is still missing.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4126 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KDiskDeviceJobQueue.h

@@ -3,6 +3,8 @@
 #ifndef _K_DISK_DEVICE_JOB_QUEUE_H
 #define _K_DISK_DEVICE_JOB_QUEUE_H
 
+#include <OS.h>
+
 #include "disk_device_manager.h"
 
 namespace BPrivate {
@@ -16,19 +18,49 @@ public:
 	KDiskDeviceJobQueue();
 	~KDiskDeviceJobQueue();
 
+	status_t InitCheck() const;
+
 	void SetDevice(KDiskDevice *device);
 	KDiskDevice *Device() const;
 
-	KDiskDeviceJob *ActiveJob() const;	// is not in list of scheduled jobs
+	KDiskDeviceJob *ActiveJob() const;
 
 	// list of scheduled jobs
 	bool AddJob(KDiskDeviceJob *job);
 	KDiskDeviceJob *RemoveJob(int32 index);
 	bool RemoveJob(KDiskDeviceJob *job);
+		// Adding/removing is only possible before the queues is added to the
+		// manager.
 	KDiskDeviceJob *JobAt(int32 index) const;
 	int32 CountJobs() const;
 
-	void Execute();
+	status_t Execute();
+		// Called by the manager, when the queue is added to it.
+	// manager must be locked
+	status_t Cancel(bool reverse);
+	status_t Pause();
+	status_t Continue();
+	sem_id ReadyToPause();
+		// called only by the queue's thread from within a module hook
+
+	bool IsExecuting() const;
+	bool IsCanceled() const;
+	bool ShallReverse() const;
+	bool IsPaused() const;
+	bool IsPauseRequested() const;
+
+private:
+	struct JobQueue;
+
+	int32 _ThreadLoop();
+	static int32 _ThreadEntry(void *data);
+
+	KDiskDevice		*fDevice;
+	int32			fActiveJob;
+	JobQueue		*fJobs;
+	uint32			fFlags;
+	thread_id		fThread;
+	sem_id			fSyncSemaphore;
 };
 
 } // namespace DiskDevice