godot/modules/mono/mono_gd/gd_mono_cache.h

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/**************************************************************************/
/* gd_mono_cache.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
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#ifndef GD_MONO_CACHE_H
#define GD_MONO_CACHE_H
#include "../csharp_script.h"
#include "../interop_types.h"
#include "../mono_gc_handle.h"
#include "core/object/object.h"
#include "core/string/string_name.h"
#include "core/string/ustring.h"
#include "core/variant/callable.h"
#include "core/variant/dictionary.h"
#include "core/variant/variant.h"
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#include <stdint.h>
C#: Restructure code prior move to .NET Core The main focus here was to remove the majority of code that relied on Mono's embedding APIs, specially the reflection APIs. The embedding APIs we still use are the bare minimum we need for things to work. A lot of code was moved to C#. We no longer deal with any managed objects (`MonoObject*`, and such) in native code, and all marshaling is done in C#. The reason for restructuring the code and move away from embedding APIs is that once we move to .NET Core, we will be limited by the much more minimal .NET hosting. PERFORMANCE REGRESSIONS ----------------------- Some parts of the code were written with little to no concern about performance. This includes code that calls into script methods and accesses script fields, properties and events. The reason for this is that all of that will be moved to source generators, so any work prior to that would be a waste of time. DISABLED FEATURES ----------------- Some code was removed as it no longer makes sense (or won't make sense in the future). Other parts were commented out with `#if 0`s and TODO warnings because it doesn't make much sense to work on them yet as those parts will change heavily when we switch to .NET Core but also when we start introducing source generators. As such, the following features were disabled temporarily: - Assembly-reloading (will be done with ALCs in .NET Core). - Properties/fields exports and script method listing (will be handled by source generators in the future). - Exception logging in the editor and stack info for errors. - Exporting games. - Building of C# projects. We no longer copy the Godot API assemblies to the project directory, so MSBuild won't be able to find them. The idea is to turn them into NuGet packages in the future, which could also be obtained from local NuGet sources during development.
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class CSharpScript;
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namespace GDMonoCache {
#ifndef GD_CLR_STDCALL
#ifdef WIN32
#define GD_CLR_STDCALL __stdcall
#else
#define GD_CLR_STDCALL
#endif
#endif
struct godotsharp_property_info {
godot_string_name name; // Not owned
godot_string hint_string;
Variant::Type type;
PropertyHint hint;
PropertyUsageFlags usage;
bool exported;
};
struct godotsharp_property_def_val_pair {
godot_string_name name; // Not owned
godot_variant value;
};
struct ManagedCallbacks {
using Callback_ScriptManagerBridge_GetPropertyInfoList_Add = void(GD_CLR_STDCALL *)(CSharpScript *p_script, const String *, void *p_props, int32_t p_count);
using Callback_ScriptManagerBridge_GetPropertyDefaultValues_Add = void(GD_CLR_STDCALL *)(CSharpScript *p_script, void *p_def_vals, int32_t p_count);
using FuncSignalAwaiter_SignalCallback = void(GD_CLR_STDCALL *)(GCHandleIntPtr, const Variant **, int32_t, bool *);
C#: Remove need for reflection to invoking callable delegates We aim to make the C# API reflection-free, mainly for concerns about performance, and to be able to target NativeAOT in refletion-free mode, which reduces the binary size. One of the main usages of reflection still left was the dynamic invokation of callable delegates, and for some time I wasn't sure I would find an alternative solution that I'd be happy with. The new solution uses trampoline functions to invoke the delegates: ``` static void Trampoline(object delegateObj, NativeVariantPtrArgs args, out godot_variant ret) { if (args.Count != 1) throw new ArgumentException($"Callable expected 1 arguments but received {args.Count}."); string res = ((Func<int, string>)delegateObj)( VariantConversionCallbacks.GetToManagedCallback<int>()(args[0]) ); ret = VariantConversionCallbacks.GetToVariantCallback<string>()(res); } Callable.CreateWithUnsafeTrampoline((int num) => "Foo" + num, &Trampoline); ``` Of course, this is too much boilerplate for user code. To improve this, the `Callable.From` methods were added. These are overloads that take `Action` and `Func` delegates, which covers the most common use cases: lambdas and method groups: ``` // Lambda Callable.From((int num) => "Foo" + num); // Method group string AppendNum(int num) => "Foo" + num; Callable.From(AppendNum); ``` Unfortunately, due to limitations in the C# language, implicit conversions from delegates to `Callable` are not supported. `Callable.From` does not support custom delegates. These should be uncommon, but the Godot C# API actually uses them for event signals. As such, the bindings generator was updated to generate trampoline functions for event signals. It was also optimized to use `Action` instead of a custom delegate for parameterless signals, which removes the need for the trampoline functions for those signals. The change to reflection-free invokation removes one of the last needs for `ConvertVariantToManagedObjectOfType`. The only remaining usage is from calling script constructors with parameters from the engine (`CreateManagedForGodotObjectScriptInstance`). Once that one is made reflection-free, `ConvertVariantToManagedObjectOfType` can be removed.
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using FuncDelegateUtils_InvokeWithVariantArgs = void(GD_CLR_STDCALL *)(GCHandleIntPtr, void *, const Variant **, int32_t, const Variant *);
using FuncDelegateUtils_DelegateEquals = bool(GD_CLR_STDCALL *)(GCHandleIntPtr, GCHandleIntPtr);
using FuncDelegateUtils_DelegateHash = int32_t(GD_CLR_STDCALL *)(GCHandleIntPtr);
using FuncDelegateUtils_TrySerializeDelegateWithGCHandle = bool(GD_CLR_STDCALL *)(GCHandleIntPtr, const Array *);
using FuncDelegateUtils_TryDeserializeDelegateWithGCHandle = bool(GD_CLR_STDCALL *)(const Array *, GCHandleIntPtr *);
using FuncScriptManagerBridge_FrameCallback = void(GD_CLR_STDCALL *)();
using FuncScriptManagerBridge_CreateManagedForGodotObjectBinding = GCHandleIntPtr(GD_CLR_STDCALL *)(const StringName *, Object *);
using FuncScriptManagerBridge_CreateManagedForGodotObjectScriptInstance = bool(GD_CLR_STDCALL *)(const CSharpScript *, Object *, const Variant **, int32_t);
using FuncScriptManagerBridge_GetScriptNativeName = void(GD_CLR_STDCALL *)(const CSharpScript *, StringName *);
using FuncScriptManagerBridge_GetGlobalClassName = void(GD_CLR_STDCALL *)(const String *, String *, String *, String *);
using FuncScriptManagerBridge_SetGodotObjectPtr = void(GD_CLR_STDCALL *)(GCHandleIntPtr, Object *);
using FuncScriptManagerBridge_RaiseEventSignal = void(GD_CLR_STDCALL *)(GCHandleIntPtr, const StringName *, const Variant **, int32_t, bool *);
using FuncScriptManagerBridge_ScriptIsOrInherits = bool(GD_CLR_STDCALL *)(const CSharpScript *, const CSharpScript *);
using FuncScriptManagerBridge_AddScriptBridge = bool(GD_CLR_STDCALL *)(const CSharpScript *, const String *);
using FuncScriptManagerBridge_GetOrCreateScriptBridgeForPath = void(GD_CLR_STDCALL *)(const String *, Ref<CSharpScript> *);
using FuncScriptManagerBridge_RemoveScriptBridge = void(GD_CLR_STDCALL *)(const CSharpScript *);
using FuncScriptManagerBridge_TryReloadRegisteredScriptWithClass = bool(GD_CLR_STDCALL *)(const CSharpScript *);
using FuncScriptManagerBridge_UpdateScriptClassInfo = void(GD_CLR_STDCALL *)(const CSharpScript *, CSharpScript::TypeInfo *, Array *, Dictionary *, Dictionary *, Ref<CSharpScript> *);
using FuncScriptManagerBridge_SwapGCHandleForType = bool(GD_CLR_STDCALL *)(GCHandleIntPtr, GCHandleIntPtr *, bool);
using FuncScriptManagerBridge_GetPropertyInfoList = void(GD_CLR_STDCALL *)(CSharpScript *, Callback_ScriptManagerBridge_GetPropertyInfoList_Add);
using FuncScriptManagerBridge_GetPropertyDefaultValues = void(GD_CLR_STDCALL *)(CSharpScript *, Callback_ScriptManagerBridge_GetPropertyDefaultValues_Add);
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using FuncScriptManagerBridge_CallStatic = bool(GD_CLR_STDCALL *)(const CSharpScript *, const StringName *, const Variant **, int32_t, Callable::CallError *, Variant *);
using FuncCSharpInstanceBridge_Call = bool(GD_CLR_STDCALL *)(GCHandleIntPtr, const StringName *, const Variant **, int32_t, Callable::CallError *, Variant *);
using FuncCSharpInstanceBridge_Set = bool(GD_CLR_STDCALL *)(GCHandleIntPtr, const StringName *, const Variant *);
using FuncCSharpInstanceBridge_Get = bool(GD_CLR_STDCALL *)(GCHandleIntPtr, const StringName *, Variant *);
using FuncCSharpInstanceBridge_CallDispose = void(GD_CLR_STDCALL *)(GCHandleIntPtr, bool);
using FuncCSharpInstanceBridge_CallToString = void(GD_CLR_STDCALL *)(GCHandleIntPtr, String *, bool *);
using FuncCSharpInstanceBridge_HasMethodUnknownParams = bool(GD_CLR_STDCALL *)(GCHandleIntPtr, const StringName *);
using FuncCSharpInstanceBridge_SerializeState = void(GD_CLR_STDCALL *)(GCHandleIntPtr, const Dictionary *, const Dictionary *);
using FuncCSharpInstanceBridge_DeserializeState = void(GD_CLR_STDCALL *)(GCHandleIntPtr, const Dictionary *, const Dictionary *);
using FuncGCHandleBridge_FreeGCHandle = void(GD_CLR_STDCALL *)(GCHandleIntPtr);
using FuncGCHandleBridge_GCHandleIsTargetCollectible = bool(GD_CLR_STDCALL *)(GCHandleIntPtr);
using FuncDebuggingUtils_GetCurrentStackInfo = void(GD_CLR_STDCALL *)(Vector<ScriptLanguage::StackInfo> *);
using FuncDisposablesTracker_OnGodotShuttingDown = void(GD_CLR_STDCALL *)();
using FuncGD_OnCoreApiAssemblyLoaded = void(GD_CLR_STDCALL *)(bool);
FuncSignalAwaiter_SignalCallback SignalAwaiter_SignalCallback;
FuncDelegateUtils_InvokeWithVariantArgs DelegateUtils_InvokeWithVariantArgs;
FuncDelegateUtils_DelegateEquals DelegateUtils_DelegateEquals;
FuncDelegateUtils_DelegateHash DelegateUtils_DelegateHash;
FuncDelegateUtils_TrySerializeDelegateWithGCHandle DelegateUtils_TrySerializeDelegateWithGCHandle;
FuncDelegateUtils_TryDeserializeDelegateWithGCHandle DelegateUtils_TryDeserializeDelegateWithGCHandle;
FuncScriptManagerBridge_FrameCallback ScriptManagerBridge_FrameCallback;
FuncScriptManagerBridge_CreateManagedForGodotObjectBinding ScriptManagerBridge_CreateManagedForGodotObjectBinding;
FuncScriptManagerBridge_CreateManagedForGodotObjectScriptInstance ScriptManagerBridge_CreateManagedForGodotObjectScriptInstance;
FuncScriptManagerBridge_GetScriptNativeName ScriptManagerBridge_GetScriptNativeName;
FuncScriptManagerBridge_GetGlobalClassName ScriptManagerBridge_GetGlobalClassName;
FuncScriptManagerBridge_SetGodotObjectPtr ScriptManagerBridge_SetGodotObjectPtr;
FuncScriptManagerBridge_RaiseEventSignal ScriptManagerBridge_RaiseEventSignal;
FuncScriptManagerBridge_ScriptIsOrInherits ScriptManagerBridge_ScriptIsOrInherits;
FuncScriptManagerBridge_AddScriptBridge ScriptManagerBridge_AddScriptBridge;
FuncScriptManagerBridge_GetOrCreateScriptBridgeForPath ScriptManagerBridge_GetOrCreateScriptBridgeForPath;
FuncScriptManagerBridge_RemoveScriptBridge ScriptManagerBridge_RemoveScriptBridge;
FuncScriptManagerBridge_TryReloadRegisteredScriptWithClass ScriptManagerBridge_TryReloadRegisteredScriptWithClass;
FuncScriptManagerBridge_UpdateScriptClassInfo ScriptManagerBridge_UpdateScriptClassInfo;
FuncScriptManagerBridge_SwapGCHandleForType ScriptManagerBridge_SwapGCHandleForType;
FuncScriptManagerBridge_GetPropertyInfoList ScriptManagerBridge_GetPropertyInfoList;
FuncScriptManagerBridge_GetPropertyDefaultValues ScriptManagerBridge_GetPropertyDefaultValues;
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FuncScriptManagerBridge_CallStatic ScriptManagerBridge_CallStatic;
FuncCSharpInstanceBridge_Call CSharpInstanceBridge_Call;
FuncCSharpInstanceBridge_Set CSharpInstanceBridge_Set;
FuncCSharpInstanceBridge_Get CSharpInstanceBridge_Get;
FuncCSharpInstanceBridge_CallDispose CSharpInstanceBridge_CallDispose;
FuncCSharpInstanceBridge_CallToString CSharpInstanceBridge_CallToString;
FuncCSharpInstanceBridge_HasMethodUnknownParams CSharpInstanceBridge_HasMethodUnknownParams;
FuncCSharpInstanceBridge_SerializeState CSharpInstanceBridge_SerializeState;
FuncCSharpInstanceBridge_DeserializeState CSharpInstanceBridge_DeserializeState;
FuncGCHandleBridge_FreeGCHandle GCHandleBridge_FreeGCHandle;
FuncGCHandleBridge_GCHandleIsTargetCollectible GCHandleBridge_GCHandleIsTargetCollectible;
FuncDebuggingUtils_GetCurrentStackInfo DebuggingUtils_GetCurrentStackInfo;
FuncDisposablesTracker_OnGodotShuttingDown DisposablesTracker_OnGodotShuttingDown;
FuncGD_OnCoreApiAssemblyLoaded GD_OnCoreApiAssemblyLoaded;
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};
extern ManagedCallbacks managed_callbacks;
extern bool godot_api_cache_updated;
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void update_godot_api_cache(const ManagedCallbacks &p_managed_callbacks);
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} // namespace GDMonoCache
#endif // GD_MONO_CACHE_H