Added setter/getter for an error message. Should be set to something informative when while executing a job an error occurs.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4842 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/KDiskDeviceJob.h

@@ -34,6 +34,9 @@ public:
 	partition_id PartitionID() const;
 	partition_id ScopeID() const;
 
+	status_t SetErrorMessage(const char *message);
+	const char *ErrorMessage() const;
+
 	void SetTaskCount(int32 count);
 	int32 TaskCount() const;
 
@@ -66,6 +69,7 @@ private:
 	partition_id		fPartitionID;
 	partition_id		fScopeID;
 	char				*fDescription;
+	char				*fErrorMessage;
 	int32				fTaskCount;
 	int32				fCompletedTasks;
 	uint32				fInterruptProperties;

src/kernel/core/disk_device_manager/KDiskDeviceJob.cpp

@@ -1,9 +1,16 @@
 // KDiskDeviceJob.cpp
 
+#include <stdio.h>
+
 #include "ddm_userland_interface.h"
 
-#include "KDiskDeviceJob.h"
-#include "KDiskDeviceUtils.h"
+#include <KDiskDeviceJob.h>
+#include <KDiskDeviceUtils.h>
+
+// debugging
+//#define DBG(x)
+#define DBG(x) x
+#define OUT printf
 
 // constructor
 KDiskDeviceJob::KDiskDeviceJob(uint32 type, partition_id partitionID,
@@ -15,6 +22,7 @@ KDiskDeviceJob::KDiskDeviceJob(uint32 type, partition_id partitionID,
 	  fPartitionID(partitionID),
 	  fScopeID(scopeID),
 	  fDescription(NULL),
+	  fErrorMessage(NULL),
 	  fTaskCount(1),
 	  fCompletedTasks(0),
 	  fInterruptProperties(0),
@@ -101,6 +109,20 @@ KDiskDeviceJob::ScopeID() const
 	return fScopeID;
 }
 
+// SetErrorMessage
+status_t
+KDiskDeviceJob::SetErrorMessage(const char *message)
+{
+	return set_string(fErrorMessage, message);
+}
+
+// ErrorMessage
+const char *
+KDiskDeviceJob::ErrorMessage() const
+{
+	return fErrorMessage;
+}
+
 // SetTaskCount
 void
 KDiskDeviceJob::SetTaskCount(int32 count)