Start of using CoreCLR and automatic scriptglue generation

2026-11-04 21:01:48 +00:00 · 2025-07-14 22:14:41 +02:00
parent 063cbfa415
commit edfcfd3b20
24 changed files with 1548 additions and 540 deletions
@@ -0,0 +1,185 @@
+using NetHostBeef;
+using System;
+using System.Interop;
+using GlitchyEngine.Core;
+
+namespace GlitchyEngine.Scripting;
+
+public struct ScriptFunctionPointers
+{
+    public function void() OnCreate;
+    public function void(float) OnUpdate;
+    public function void() OnDestroy;
+}
+
+static class CoreClrHelper
+{
+	static HostFxr.InitializeForDotnetCommandLineFn HostFxr_Init;
+	static HostFxr.GetRuntimeDelegateFn HostFxr_GetDelegate;
+	static HostFxr.CloseFn HostFxr_Close;
+
+	static CoreClr.LoadAssemblyAndGetFunctionPointerFn LoadAssemblyAndGetFunctionPointerFn;
+	static CoreClr.GetFunctionPointerFn GetFunctionPointerFn;
+
+	private function void LoadScriptAssemblyFunc(uint8* appData, int64 appLength, uint8* pdbData, int64 pdbLength);
+
+	//static function void(char8* path) LoadScriptAssembly;
+	static LoadScriptAssemblyFunc _loadScriptAssembly;
+	static function void() _unloadAssemblies;
+
+	// public static unsafe void GetScriptClasses(void** outBuffer, long* length)
+	private function void GetScriptClassesFunc(void** outBuffer, int64* length);
+	static GetScriptClassesFunc _getScriptClasses;
+	static function void() _freeScriptClassNames;
+	
+	//public static unsafe ScriptFunctions CreateScriptInstance(UUID entityId, byte* scriptClassName)
+	private function void CreateScriptInstanceFunc(UUID entityId, char8* scriptClassName);
+	static CreateScriptInstanceFunc _createScriptInstance;
+
+	public static ScriptFunctionPointers _entityScriptFunctions;
+
+	public static void Init(StringView coreAssemblyPath)
+	{
+		LoadHostFxr();
+		InitAndStartRuntime(coreAssemblyPath);
+
+		PrepareFunction();
+	}
+
+	static void LoadHostFxr()
+	{
+		char_t[256] buffer = ?;
+		c_size bufferSize = buffer.Count;
+		int rc = NetHost.get_hostfxr_path(&buffer, &bufferSize, null);
+
+		Log.EngineLogger.AssertDebug(rc == 0, "Failed to get HostFxr path.");
+
+		// Load hostfxr and get desired exports
+		void* lib = NetHostHelper.LoadLibrary(&buffer);
+		HostFxr_Init = NetHostHelper.GetExport<HostFxr.InitializeForDotnetCommandLineFn>(lib, "hostfxr_initialize_for_dotnet_command_line");
+		HostFxr_GetDelegate = NetHostHelper.GetExport<HostFxr.GetRuntimeDelegateFn>(lib, "hostfxr_get_runtime_delegate");
+		HostFxr_Close = NetHostHelper.GetExport<HostFxr.CloseFn>(lib, "hostfxr_close");
+
+		Log.EngineLogger.AssertDebug(HostFxr_Init != null && HostFxr_GetDelegate != null && HostFxr_Close != null, "Retrieving at least one HostFxr function failed.");
+	}
+
+	static void InitAndStartRuntime(StringView coreAssembly)
+	{
+		char_t* ptr = NetHostHelper.GetScopedRawPtr!(coreAssembly);
+
+		char_t*[2] args = char_t*[](
+			ptr,
+			null
+		);
+
+		HostFxr.Handle cxt = null;
+		int rc = HostFxr_Init(1, &args, null, &cxt);
+
+		if (rc != 0 || cxt == null)
+		{
+			Log.EngineLogger.Error($"Failed to initialize HostFxr: {rc}");
+		    HostFxr_Close(cxt);
+		}
+		
+		Log.EngineLogger.Assert(rc == 0, "Failed to initialize HostFxr.");
+
+		rc = HostFxr_GetDelegate(cxt, .LoadAssemblyAndGetFunctionPointer, (void**)&LoadAssemblyAndGetFunctionPointerFn);
+
+		Log.EngineLogger.Assert(rc == 0, scope $"Get delegate failed: {rc}. (LoadAssemblyAndGetFunctionPointer)");
+
+		rc = HostFxr_GetDelegate(cxt, .GetFunctionPointer, (void**)&GetFunctionPointerFn);
+
+		Log.EngineLogger.Assert(rc == 0, scope $"Get delegate failed: {rc}. (GetFunctionPointer)");
+
+		HostFxr_Close(cxt);
+	}
+
+	static void PrepareFunction()
+	{
+		GetFunctionPointerUnmanagedCallersOnly("GlitchyEngine.ScriptGlue, ScriptCore", "LoadScriptAssembly", out _loadScriptAssembly);
+
+		GetFunctionPointerUnmanagedCallersOnly("GlitchyEngine.ScriptGlue, ScriptCore", "UnloadAssemblies", out _unloadAssemblies);
+		
+		GetFunctionPointerUnmanagedCallersOnly("GlitchyEngine.ScriptGlue, ScriptCore", "GetScriptClasses", out _getScriptClasses);
+
+		GetFunctionPointerUnmanagedCallersOnly("GlitchyEngine.ScriptGlue, ScriptCore", "FreeScriptClassNames", out _freeScriptClassNames);
+
+		GetFunctionPointerUnmanagedCallersOnly("GlitchyEngine.ScriptGlue, ScriptCore", "CreateScriptInstance", out _createScriptInstance);
+
+		InitEntityFunctions();
+	}
+
+
+	static void InitEntityFunctions()
+	{
+		GetFunctionPointerUnmanagedCallersOnly("GlitchyEngine.ScriptGlue, ScriptCore", "InvokeEntityOnCreate", out _entityScriptFunctions.OnCreate);
+		GetFunctionPointerUnmanagedCallersOnly("GlitchyEngine.ScriptGlue, ScriptCore", "InvokeEntityOnUpdate", out _entityScriptFunctions.OnUpdate);
+		GetFunctionPointerUnmanagedCallersOnly("GlitchyEngine.ScriptGlue, ScriptCore", "InvokeEntityOnDestroy", out _entityScriptFunctions.OnDestroy);
+	}
+
+	public static void LoadAppAssembly(Span<uint8> appAssemblyData, Span<uint8> pdbData)
+	{
+		_loadScriptAssembly(appAssemblyData.Ptr, appAssemblyData.Length, pdbData.Ptr, pdbData.Length);
+	}
+
+	public static void UnloadAssemblies()
+	{
+		_unloadAssemblies();
+	}	
+
+	/// Gets an array of script class infos. Use FreeScriptClassNames to release the buffer.
+	public static void GetScriptClasses(out void* outBuffer, out int64 entryCount)
+	{
+		outBuffer = null;
+		entryCount = 0;
+		_getScriptClasses(&outBuffer, &entryCount);
+	}	
+
+	/// Releases the buffer created by GetScriptClasses
+	public static void FreeScriptClassNames()
+	{
+		_freeScriptClassNames();
+	}
+
+	public static void CreateScriptInstance(UUID entityId, StringView scriptName)
+	{
+		_createScriptInstance(entityId, scriptName.Ptr);
+	}
+
+	public static int GetFunctionPointer<T>(StringView typeName, StringView methodName, StringView delegateName, out T outDelegate) where T: operator explicit void*
+	{
+		void* funPtr = null;
+
+		int rc = GetFunctionPointerFn(NetHostHelper.GetScopedRawPtr!(typeName),
+			NetHostHelper.GetScopedRawPtr!(methodName), NetHostHelper.GetScopedRawPtr!(delegateName),
+			null, null, out funPtr);
+
+		outDelegate = (T)funPtr;
+
+		return rc;
+	}
+
+	public static int GetFunctionPointerDefaultDelegate(StringView typeName, StringView methodName, out CoreClr.DefaultEntryPoint outDelegate)
+	{
+		void* funPtr = null;
+
+		int rc = GetFunctionPointerFn(NetHostHelper.GetScopedRawPtr!(typeName),
+			NetHostHelper.GetScopedRawPtr!(methodName), null, null, null, out funPtr);
+
+		outDelegate = (CoreClr.DefaultEntryPoint)funPtr;
+
+		return rc;
+	}
+
+	public static int GetFunctionPointerUnmanagedCallersOnly<T>(StringView typeName, StringView methodName, out T outDelegate) where T: operator explicit void*
+	{
+		void* funPtr = null;
+
+		int rc = GetFunctionPointerFn(NetHostHelper.GetScopedRawPtr!(typeName),
+			NetHostHelper.GetScopedRawPtr!(methodName), CoreClr.UNMANAGEDCALLERSONLY_METHOD, null, null, out funPtr);
+
+		outDelegate = (T)funPtr;
+
+		return rc;
+	}
+}