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2022-08-22C#: Ensure native handles are freed after switch to .NET CoreIgnacio Roldán Etcheverry
Finalizers are longer guaranteed to be called on exit now that we switched to .NET Core. This results in native instances leaking. The only solution I can think of so far is to keep a list of all instances alive to dispose when the AssemblyLoadContext.Unloading event is raised.
2022-08-22C#: Restructure code prior move to .NET CoreIgnacio Roldán Etcheverry
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.
2022-08-22C#: Move marshaling logic and generated glue to C#Ignacio Roldán Etcheverry
We will be progressively moving most code to C#. The plan is to only use Mono's embedding APIs to set things at launch. This will make it much easier to later support CoreCLR too which doesn't have rich embedding APIs. Additionally the code in C# is more maintainable and makes it easier to implement new features, e.g.: runtime codegen which we could use to avoid using reflection for marshaling everytime a field, property or method is accessed. SOME NOTES ON INTEROP We make the same assumptions as GDNative about the size of the Godot structures we use. We take it a bit further by also assuming the layout of fields in some cases, which is riskier but let's us squeeze out some performance by avoiding unnecessary managed to native calls. Code that deals with native structs is less safe than before as there's no RAII and copy constructors in C#. It's like using the GDNative C API directly. One has to take special care to free values they own. Perhaps we could use roslyn analyzers to check this, but I don't know any that uses attributes to determine what's owned or borrowed. As to why we maily use pointers for native structs instead of ref/out: - AFAIK (and confirmed with a benchmark) ref/out are pinned during P/Invoke calls and that has a cost. - Native struct fields can't be ref/out in the first place. - A `using` local can't be passed as ref/out, only `in`. Calling a method or property on an `in` value makes a silent copy, so we want to avoid `in`. REGARDING THE BUILD SYSTEM There's no longer a `mono_glue=yes/no` SCons options. We no longer need to build with `mono_glue=no`, generate the glue and then build again with `mono_glue=yes`. We build only once and generate the glue (which is in C# now). However, SCons no longer builds the C# projects for us. Instead one must run `build_assemblies.py`, e.g.: ```sh %godot_src_root%/modules/mono/build_scripts/build_assemblies.py \ --godot-output-dir=%godot_src_root%/bin \ --godot-target=release_debug` ``` We could turn this into a custom build target, but I don't know how to do that with SCons (it's possible with Meson). OTHER NOTES Most of the moved code doesn't follow the C# naming convention and still has the word Mono in the names despite no longer dealing with Mono's embedding APIs. This is just temporary while transitioning, to make it easier to understand what was moved where.
2022-01-03Update copyright statements to 2022Rémi Verschelde
Happy new year to the wonderful Godot community!
2021-01-01Update copyright statements to 2021Rémi Verschelde
Happy new year to the wonderful Godot community! 2020 has been a tough year for most of us personally, but a good year for Godot development nonetheless with a huge amount of work done towards Godot 4.0 and great improvements backported to the long-lived 3.2 branch. We've had close to 400 contributors to engine code this year, authoring near 7,000 commit! (And that's only for the `master` branch and for the engine code, there's a lot more when counting docs, demos and other first-party repos.) Here's to a great year 2021 for all Godot users 🎆
2020-01-01Update copyright statements to 2020Rémi Verschelde
Happy new year to the wonderful Godot community! We're starting a new decade with a well-established, non-profit, free and open source game engine, and tons of further improvements in the pipeline from hundreds of contributors. Godot will keep getting better, and we're looking forward to all the games that the community will keep developing and releasing with it.
2019-08-09Replace 'ERR_EXPLAIN' with 'ERR_FAIL_*_MSG' in 'modules/mono'Ignacio Etcheverry
And 'CRASH_*_MSG' as well. Also make error messages puntuation and quotation more consistent.
2019-07-05Re-write mono module editor code in C#Ignacio Etcheverry
Make the build system automatically build the C# Api assemblies to be shipped with the editor. Make the editor, editor player and debug export templates use Api assemblies built with debug symbols. Always run MSBuild to build the editor tools and Api assemblies when building Godot. Several bugs fixed related to assembly hot reloading and restoring state. Fix StringExtensions internal calls not being registered correctly, resulting in MissingMethodException.
2019-01-01Update copyright statements to 2019Rémi Verschelde
Happy new year to the wonderful Godot community!
2018-11-08Improve the C# API projects generationIgnacio Etcheverry
- Now there is only one solution that contains both GodotSharp and GodotSharpEditor project. Previously we had one solution for each project - GodotSharpEditor reference GodotShatp with a 'ProjectReference'. Previously it was a 'Reference' to the assembly - This also simplifies the command line option to generate this solution: 'godot --generate-cs-api <OutputDir>'
2018-08-25Added Collections namespace to Array & Dictionaryexts
2018-02-25Mono: Better versioning and gracefully unloading of Godot API assembliesIgnacio Etcheverry
2018-01-05Add missing copyright headers and fix formattingRémi Verschelde
Using `misc/scripts/fix_headers.py` on all Godot files. Some missing header guards were added, and the header inclusion order was fixed in the Bullet module.
2018-01-01Update copyright statements to 2018Rémi Verschelde
Happy new year to the wonderful Godot community!
2017-10-03Added mono moduleIgnacio Etcheverry