Add an empty ICodeDataLogger emulator service, make it a required service for CDL.cs

BizHawk.Client.EmuHawk/tools/CDL.cs

@@ -44,6 +44,9 @@ namespace BizHawk.Client.EmuHawk
 		[RequiredService]
 		private IMemoryDomains MemoryDomains { get; set; }
 
+		[RequiredService]
+		private ICodeDataLogger CodeDataLogger { get; set; }
+
 		private string _currentFileName = string.Empty;
 
 		public CDL()

BizHawk.Emulation.Common/BizHawk.Emulation.Common.csproj

@@ -73,6 +73,7 @@
     <Compile Include="EmulationExceptions.cs" />
     <Compile Include="Enums.cs" />
     <Compile Include="Extensions.cs" />
+    <Compile Include="Interfaces\ICodeDataLogger.cs" />
     <Compile Include="Interfaces\IController.cs" />
     <Compile Include="Interfaces\ICoreFileProvider.cs" />
     <Compile Include="Interfaces\IDebuggable.cs" />

BizHawk.Emulation.Common/Extensions.cs

@@ -240,6 +240,21 @@ namespace BizHawk.Emulation.Common.IEmulatorExtensions
 			return (IRegionable)core.ServiceProvider.GetService<IRegionable>();
 		}
 
+		public static bool CanDataLog(this IEmulator core)
+		{
+			if (core == null)
+			{
+				return false;
+			}
+
+			return core.ServiceProvider.HasService<ICodeDataLogger>();
+		}
+
+		public static ICodeDataLogger AsCodeDataLogger(this IEmulator core)
+		{
+			return core.ServiceProvider.GetService<ICodeDataLogger>();
+		}
+
 		// TODO: a better place for these
 		public static bool IsImplemented(this MethodInfo info)
 		{

BizHawk.Emulation.Common/Interfaces/ICodeDataLogger.cs

@@ -0,0 +1,6 @@
+namespace BizHawk.Emulation.Common
+{
+	public interface ICodeDataLogger : IEmulatorService
+	{
+	}
+}