Merge pull request #208 from DarthAffe/ExceptionHandling

Exception handling

RGB.NET.Core/Devices/AbstractRGBDeviceProvider.cs

@@ -22,7 +22,7 @@ namespace RGB.NET.Core
 
         #region Events
 
-        public event EventHandler<Exception>? Exception;
+        public event EventHandler<ExceptionEventArgs>? Exception;
 
         #endregion
 
@@ -54,10 +54,15 @@ namespace RGB.NET.Core
 
                 IsInitialized = true;
             }
+            catch (DeviceProviderException)
+            {
+                Reset();
+                throw;
+            }
             catch (Exception ex)
             {
                 Reset();
-                Throw(ex);
+                Throw(ex, true);
                 return false;
             }
 
@@ -66,13 +71,23 @@ namespace RGB.NET.Core
 
         protected virtual IEnumerable<IRGBDevice> GetLoadedDevices(RGBDeviceType loadFilter)
         {
+            List<IRGBDevice> devices = new();
             foreach (IRGBDevice device in LoadDevices())
+            {
+                try
                 {
                     if (loadFilter.HasFlag(device.DeviceInfo.DeviceType))
-                    yield return device;
+                        devices.Add(device);
                     else
                         device.Dispose();
                 }
+                catch (Exception ex)
+                {
+                    Throw(ex);
+                }
+            }
+
+            return devices;
         }
 
         protected abstract void InitializeSDK();
@@ -98,15 +113,16 @@ namespace RGB.NET.Core
             IsInitialized = false;
         }
 
-        protected virtual void Throw(Exception ex)
+        protected virtual void Throw(Exception ex, bool isCritical = false)
         {
-            try { OnException(ex); } catch { /* we don't want to throw due to bad event handlers */ }
+            ExceptionEventArgs args = new(ex, isCritical, ThrowsExceptions);
+            try { OnException(args); } catch { /* we don't want to throw due to bad event handlers */ }
 
-            if (ThrowsExceptions)
-                throw ex;
+            if (args.Throw)
+                throw new DeviceProviderException(ex, isCritical);
         }
 
-        protected virtual void OnException(Exception ex) => Exception?.Invoke(this, ex);
+        protected virtual void OnException(ExceptionEventArgs args) => Exception?.Invoke(this, args);
 
         public virtual void Dispose()
         {

RGB.NET.Core/Devices/IRGBDeviceProvider.cs

@@ -27,7 +27,7 @@ namespace RGB.NET.Core
         /// <summary>
         /// Occurs when an exception is thrown in the device provider
         /// </summary>
-        event EventHandler<Exception>? Exception;
+        event EventHandler<ExceptionEventArgs>? Exception;
 
         #endregion
 

RGB.NET.Core/Events/ExceptionEventArgs.cs

@@ -18,6 +18,10 @@ namespace RGB.NET.Core
         /// </summary>
         public Exception Exception { get; }
 
+        public bool IsCritical { get; }
+
+        public bool Throw { get; set; }
+
         #endregion
 
         #region Constructors
@@ -27,9 +31,11 @@ namespace RGB.NET.Core
         /// Initializes a new instance of the <see cref="T:RGB.NET.Core.ExceptionEventArgs" /> class.
         /// </summary>
         /// <param name="exception">The <see cref="T:System.Exception" /> which is responsible for the event-call.</param>
-        public ExceptionEventArgs(Exception exception)
+        public ExceptionEventArgs(Exception exception, bool isCritical = false, bool @throw = false)
         {
             this.Exception = exception;
+            this.IsCritical = isCritical;
+            this.Throw = @throw;
         }
 
         #endregion

RGB.NET.Core/Exceptions/DeviceProviderException.cs

@@ -0,0 +1,23 @@
+using System;
+
+namespace RGB.NET.Core
+{
+    public class DeviceProviderException : ApplicationException
+    {
+        #region Properties & Fields
+
+        private bool IsCritical { get; }
+
+        #endregion
+
+        #region Constructors
+
+        public DeviceProviderException(Exception? innerException, bool isCritical)
+            : base(innerException?.Message, innerException)
+        {
+            this.IsCritical = isCritical;
+        }
+
+        #endregion
+    }
+}

RGB.NET.Devices.CoolerMaster/CoolerMasterDeviceProvider.cs

@@ -56,7 +56,7 @@ namespace RGB.NET.Devices.CoolerMaster
         protected override void InitializeSDK()
         {
             _CoolerMasterSDK.Reload();
-            if (_CoolerMasterSDK.GetSDKVersion() <= 0) Throw(new RGBDeviceException("Failed to initialize CoolerMaster-SDK"));
+            if (_CoolerMasterSDK.GetSDKVersion() <= 0) Throw(new RGBDeviceException("Failed to initialize CoolerMaster-SDK"), true);
         }
 
         protected override IEnumerable<IRGBDevice> LoadDevices()

RGB.NET.Devices.CoolerMaster/Native/_CoolerMasterSDK.cs

@@ -41,6 +41,7 @@ namespace RGB.NET.Devices.CoolerMaster.Native
             if (dllPath == null) throw new RGBDeviceException($"Can't find the CoolerMaster-SDK at one of the expected locations:\r\n '{string.Join("\r\n", possiblePathList.Select(Path.GetFullPath))}'");
 
             _dllHandle = LoadLibrary(dllPath);
+            if (_dllHandle == IntPtr.Zero) throw new RGBDeviceException($"CoolerMaster LoadLibrary failed with error code {Marshal.GetLastWin32Error()}");
 
             _getSDKVersionPointer = (GetSDKVersionPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "GetCM_SDK_DllVer"), typeof(GetSDKVersionPointer));
             _setControlDevicenPointer = (SetControlDevicePointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "SetControlDevice"), typeof(SetControlDevicePointer));

RGB.NET.Devices.Corsair/CorsairDeviceProvider.cs

@@ -71,16 +71,16 @@ namespace RGB.NET.Devices.Corsair
 
             CorsairError error = LastError;
             if (error != CorsairError.Success)
-                Throw(new CUEException(error));
+                Throw(new CUEException(error), true);
 
             if (ProtocolDetails.BreakingChanges)
                 Throw(new RGBDeviceException("The SDK currently used isn't compatible with the installed version of CUE.\r\n"
                                            + $"CUE-Version: {ProtocolDetails.ServerVersion} (Protocol {ProtocolDetails.ServerProtocolVersion})\r\n"
-                                           + $"SDK-Version: {ProtocolDetails.SdkVersion} (Protocol {ProtocolDetails.SdkProtocolVersion})"));
+                                           + $"SDK-Version: {ProtocolDetails.SdkVersion} (Protocol {ProtocolDetails.SdkProtocolVersion})"), true);
 
             // DarthAffe 02.02.2021: 127 is iCUE
             if (!_CUESDK.CorsairSetLayerPriority(128))
-                Throw(new CUEException(LastError));
+                Throw(new CUEException(LastError), false);
         }
 
         /// <inheritdoc />

RGB.NET.Devices.Corsair/Native/_CUESDK.cs

@@ -36,6 +36,7 @@ namespace RGB.NET.Devices.Corsair.Native
             if (dllPath == null) throw new RGBDeviceException($"Can't find the CUE-SDK at one of the expected locations:\r\n '{string.Join("\r\n", possiblePathList.Select(Path.GetFullPath))}'");
 
             _dllHandle = LoadLibrary(dllPath);
+            if (_dllHandle == IntPtr.Zero) throw new RGBDeviceException($"Corsair LoadLibrary failed with error code {Marshal.GetLastWin32Error()}");
 
             _corsairSetLedsColorsBufferByDeviceIndexPointer = (CorsairSetLedsColorsBufferByDeviceIndexPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "CorsairSetLedsColorsBufferByDeviceIndex"), typeof(CorsairSetLedsColorsBufferByDeviceIndexPointer));
             _corsairSetLedsColorsFlushBufferPointer = (CorsairSetLedsColorsFlushBufferPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "CorsairSetLedsColorsFlushBuffer"), typeof(CorsairSetLedsColorsFlushBufferPointer));

RGB.NET.Devices.Logitech/LogitechDeviceProvider.cs

@@ -124,7 +124,7 @@ namespace RGB.NET.Devices.Logitech
             _perKeyUpdateQueue = new LogitechPerKeyUpdateQueue(GetUpdateTrigger());
 
             _LogitechGSDK.Reload();
-            if (!_LogitechGSDK.LogiLedInit()) Throw(new RGBDeviceException("Failed to initialize Logitech-SDK."));
+            if (!_LogitechGSDK.LogiLedInit()) Throw(new RGBDeviceException("Failed to initialize Logitech-SDK."), true);
 
             _LogitechGSDK.LogiLedSaveCurrentLighting();
         }

RGB.NET.Devices.Logitech/Native/_LogitechGSDK.cs

@@ -37,6 +37,7 @@ namespace RGB.NET.Devices.Logitech.Native
             if (dllPath == null) throw new RGBDeviceException($"Can't find the Logitech-SDK at one of the expected locations:\r\n '{string.Join("\r\n", possiblePathList.Select(Path.GetFullPath))}'");
 
             _dllHandle = LoadLibrary(dllPath);
+            if (_dllHandle == IntPtr.Zero) throw new RGBDeviceException($"Logitech LoadLibrary failed with error code {Marshal.GetLastWin32Error()}");
 
             _logiLedInitPointer = (LogiLedInitPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "LogiLedInit"), typeof(LogiLedInitPointer));
             _logiLedShutdownPointer = (LogiLedShutdownPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "LogiLedShutdown"), typeof(LogiLedShutdownPointer));

RGB.NET.Devices.Msi/MsiDeviceProvider.cs

@@ -59,14 +59,14 @@ namespace RGB.NET.Devices.Msi
 
             int errorCode;
             if ((errorCode = _MsiSDK.Initialize()) != 0)
-                ThrowMsiError(errorCode);
+                ThrowMsiError(errorCode, true);
         }
 
         protected override IEnumerable<IRGBDevice> LoadDevices()
         {
             int errorCode;
             if ((errorCode = _MsiSDK.GetDeviceInfo(out string[] deviceTypes, out int[] ledCounts)) != 0)
-                ThrowMsiError(errorCode);
+                ThrowMsiError(errorCode, true);
 
             for (int i = 0; i < deviceTypes.Length; i++)
             {
@@ -93,7 +93,7 @@ namespace RGB.NET.Devices.Msi
             }
         }
 
-        private void ThrowMsiError(int errorCode) => Throw(new MysticLightException(errorCode, _MsiSDK.GetErrorMessage(errorCode)));
+        private void ThrowMsiError(int errorCode, bool isCritical = false) => Throw(new MysticLightException(errorCode, _MsiSDK.GetErrorMessage(errorCode)), isCritical);
 
         /// <inheritdoc />
         public override void Dispose()

RGB.NET.Devices.Msi/Native/_MsiSDK.cs

@@ -38,6 +38,7 @@ namespace RGB.NET.Devices.Msi.Native
             SetDllDirectory(Path.GetDirectoryName(Path.GetFullPath(dllPath))!);
 
             _dllHandle = LoadLibrary(dllPath);
+            if (_dllHandle == IntPtr.Zero) throw new RGBDeviceException($"MSI LoadLibrary failed with error code {Marshal.GetLastWin32Error()}");
 
             _initializePointer = (InitializePointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "MLAPI_Initialize"), typeof(InitializePointer));
             _getDeviceInfoPointer = (GetDeviceInfoPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "MLAPI_GetDeviceInfo"), typeof(GetDeviceInfoPointer));

RGB.NET.Devices.Razer/Native/_RazerSDK.cs

@@ -36,6 +36,7 @@ namespace RGB.NET.Devices.Razer.Native
             if (dllPath == null) throw new RGBDeviceException($"Can't find the Razer-SDK at one of the expected locations:\r\n '{string.Join("\r\n", possiblePathList.Select(Path.GetFullPath))}'");
 
             _dllHandle = LoadLibrary(dllPath);
+            if (_dllHandle == IntPtr.Zero) throw new RGBDeviceException($"Razer LoadLibrary failed with error code {Marshal.GetLastWin32Error()}");
 
             _initPointer = (InitPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "Init"), typeof(InitPointer));
             _unInitPointer = (UnInitPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "UnInit"), typeof(UnInitPointer));

RGB.NET.Devices.Razer/RazerDeviceProvider.cs

@@ -218,7 +218,7 @@ namespace RGB.NET.Devices.Razer
 
             RazerError error;
             if (((error = _RazerSDK.Init()) != RazerError.Success) && Enum.IsDefined(typeof(RazerError), error)) //HACK DarthAffe 08.02.2018: The x86-SDK seems to have a problem here ...
-                ThrowRazerError(error);
+                ThrowRazerError(error, true);
         }
 
         protected override IEnumerable<IRGBDevice> GetLoadedDevices(RGBDeviceType loadFilter)
@@ -265,7 +265,7 @@ namespace RGB.NET.Devices.Razer
             }
         }
 
-        private void ThrowRazerError(RazerError errorCode) => throw new RazerException(errorCode);
+        private void ThrowRazerError(RazerError errorCode, bool isCritical) => Throw(new RazerException(errorCode), isCritical);
 
         private void TryUnInit()
         {

RGB.NET.Devices.Wooting/Native/_WootingSDK.cs

@@ -38,6 +38,7 @@ namespace RGB.NET.Devices.Wooting.Native
             SetDllDirectory(Path.GetDirectoryName(Path.GetFullPath(dllPath))!);
 
             _dllHandle = LoadLibrary(dllPath);
+            if (_dllHandle == IntPtr.Zero) throw new RGBDeviceException($"Wooting LoadLibrary failed with error code {Marshal.GetLastWin32Error()}");
 
             _getDeviceInfoPointer = (GetDeviceInfoPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "wooting_rgb_device_info"), typeof(GetDeviceInfoPointer));
             _keyboardConnectedPointer = (KeyboardConnectedPointer)Marshal.GetDelegateForFunctionPointer(GetProcAddress(_dllHandle, "wooting_rgb_kbd_connected"), typeof(KeyboardConnectedPointer));