Fixed a few stability issues in the logging implementation. Added support for logging sensors once the reappear.

GUI/MainForm.cs

@@ -150,6 +150,8 @@ namespace OpenHardwareMonitor.GUI {
         wmiProvider = new WmiProvider(computer);
       }
 
+      logger = new Logger(computer);
+
       plotColorPalette = new Color[13];
       plotColorPalette[0] = Color.Blue;
       plotColorPalette[1] = Color.OrangeRed;
@@ -282,7 +284,6 @@ namespace OpenHardwareMonitor.GUI {
 
       logSensors = new UserOption("logSensorsMenuItem", false, logSensorsMenuItem,
         settings);      
-      logger = new Logger(computer);
 
       InitializePlotForm();
 
@@ -497,6 +498,7 @@ namespace OpenHardwareMonitor.GUI {
       Close();
     }
 
+    private int delayCount = 0;
     private void timer_Tick(object sender, EventArgs e) {
       computer.Accept(updateVisitor);
       treeView.Invalidate();
@@ -508,8 +510,12 @@ namespace OpenHardwareMonitor.GUI {
       if (wmiProvider != null)
         wmiProvider.Update();
 
-      if (logSensors.Value)
+
+      if (logSensors.Value && delayCount >= 4)
         logger.Log();
+
+      if (delayCount < 4)
+        delayCount++;
     }
 
     private void SaveConfiguration() {

Properties/AssemblyVersion.cs

@@ -10,5 +10,5 @@
 
 using System.Reflection;
 
-[assembly: AssemblyVersion("0.6.0.8")]
-[assembly: AssemblyInformationalVersion("0.6.0.8 Alpha")]
+[assembly: AssemblyVersion("0.6.0.9")]
+[assembly: AssemblyInformationalVersion("0.6.0.9 Alpha")]

Utilities/Logger.cs

@@ -25,6 +25,7 @@ namespace OpenHardwareMonitor.Utilities {
 
     private DateTime day = DateTime.MinValue;
     private string fileName;
+    private string[] identifiers;
     private ISensor[] sensors;
 
     public Logger(IComputer computer) {
@@ -34,6 +35,7 @@ namespace OpenHardwareMonitor.Utilities {
     }
 
     private void HardwareRemoved(IHardware hardware) {
+      hardware.SensorAdded -= SensorAdded;
       hardware.SensorRemoved -= SensorRemoved;
       foreach (ISensor sensor in hardware.Sensors)
         SensorRemoved(sensor);
@@ -42,12 +44,28 @@ namespace OpenHardwareMonitor.Utilities {
     }
 
     private void HardwareAdded(IHardware hardware) {
+      foreach (ISensor sensor in hardware.Sensors)
+        SensorAdded(sensor);
+      hardware.SensorAdded += SensorAdded;
       hardware.SensorRemoved += SensorRemoved;
       foreach (IHardware subHardware in hardware.SubHardware)
         HardwareAdded(subHardware);
     }
 
+    private void SensorAdded(ISensor sensor) {
+      if (sensors == null)
+        return;
+
+      for (int i = 0; i < sensors.Length; i++) {
+        if (sensor.Identifier.ToString() == identifiers[i])
+          sensors[i] = sensor;
+      }
+    }
+
     private void SensorRemoved(ISensor sensor) {
+      if (sensors == null)
+        return;
+
       for (int i = 0; i < sensors.Length; i++) {
         if (sensor == sensors[i])
           sensors[i] = null;
@@ -59,27 +77,10 @@ namespace OpenHardwareMonitor.Utilities {
         Path.DirectorySeparatorChar + string.Format(fileNameFormat, date);
     }
 
-    private void AddSensorRemovedHandler() {
-      for (int i = 0; i < sensors.Length; i++) {
-        ISensor sensor = sensors[i];
-        int index = i;
-        SensorEventHandler handler = null;        
-        handler = s => {
-          if (s != sensor) 
-            return;
-
-          sensors[index] = null;
-          sensor.Hardware.SensorRemoved -= handler;          
-        };
-        sensor.Hardware.SensorRemoved += handler;
-      }
-    }
-
     private bool OpenExistingLogFile() {
       if (!File.Exists(fileName))
         return false;
 
-      string[] identifiers;
       try {
         String line;
         using (StreamReader reader = new StreamReader(fileName)) 
@@ -90,11 +91,14 @@ namespace OpenHardwareMonitor.Utilities {
         
         identifiers = line.Split(',').Skip(1).ToArray();
       } catch {
+        identifiers = null;
         return false;
       }
 
-      if (identifiers.Length == 0)
+      if (identifiers.Length == 0) {
+        identifiers = null;
         return false;
+      }
 
       sensors = new ISensor[identifiers.Length];
       SensorVisitor visitor = new SensorVisitor(sensor => {
@@ -113,6 +117,7 @@ namespace OpenHardwareMonitor.Utilities {
       });
       visitor.VisitComputer(computer);
       sensors = list.ToArray();
+      identifiers = sensors.Select(s => s.Identifier.ToString()).ToArray();
 
       using (StreamWriter writer = new StreamWriter(fileName, false)) {
         writer.Write(",");
@@ -139,7 +144,7 @@ namespace OpenHardwareMonitor.Utilities {
 
     public void Log() {
       var now = DateTime.Now;
-      if (day != now.Date) {
+      if (day != now.Date || !File.Exists(fileName)) {
         day = now.Date;
         fileName = GetFileName(day);
 
@@ -147,7 +152,9 @@ namespace OpenHardwareMonitor.Utilities {
           CreateNewLogFile();
       }
 
-      using (StreamWriter writer = new StreamWriter(fileName, true)) {
+      try {
+        using (StreamWriter writer = new StreamWriter(new FileStream(fileName,
+          FileMode.Append, FileAccess.Write, FileShare.ReadWrite))) {
           writer.Write(now.ToString("G", CultureInfo.InvariantCulture));
           writer.Write(",");
           for (int i = 0; i < sensors.Length; i++) {
@@ -163,7 +170,7 @@ namespace OpenHardwareMonitor.Utilities {
               writer.WriteLine();
           }
         }
-
+      } catch (IOException) { }
     }
   }
 }