mirror of
https://github.com/godotengine/godot.git
synced 2024-12-21 10:25:24 +08:00
466 lines
16 KiB
C#
466 lines
16 KiB
C#
using System.Text;
|
|
using System.Linq;
|
|
using Microsoft.CodeAnalysis;
|
|
using Microsoft.CodeAnalysis.Text;
|
|
using Microsoft.CodeAnalysis.CSharp;
|
|
using Microsoft.CodeAnalysis.CSharp.Syntax;
|
|
|
|
namespace Godot.SourceGenerators.Internal;
|
|
|
|
[Generator]
|
|
public class UnmanagedCallbacksGenerator : ISourceGenerator
|
|
{
|
|
public void Initialize(GeneratorInitializationContext context)
|
|
{
|
|
context.RegisterForPostInitialization(ctx => { GenerateAttribute(ctx); });
|
|
}
|
|
|
|
public void Execute(GeneratorExecutionContext context)
|
|
{
|
|
INamedTypeSymbol[] unmanagedCallbacksClasses = context
|
|
.Compilation.SyntaxTrees
|
|
.SelectMany(tree =>
|
|
tree.GetRoot().DescendantNodes()
|
|
.OfType<ClassDeclarationSyntax>()
|
|
.SelectUnmanagedCallbacksClasses(context.Compilation)
|
|
// Report and skip non-partial classes
|
|
.Where(x =>
|
|
{
|
|
if (x.cds.IsPartial())
|
|
{
|
|
if (x.cds.IsNested() && !x.cds.AreAllOuterTypesPartial(out var typeMissingPartial))
|
|
{
|
|
Common.ReportNonPartialUnmanagedCallbacksOuterClass(context, typeMissingPartial!);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
Common.ReportNonPartialUnmanagedCallbacksClass(context, x.cds, x.symbol);
|
|
return false;
|
|
})
|
|
.Select(x => x.symbol)
|
|
)
|
|
.Distinct<INamedTypeSymbol>(SymbolEqualityComparer.Default)
|
|
.ToArray();
|
|
|
|
foreach (var symbol in unmanagedCallbacksClasses)
|
|
{
|
|
var attr = symbol.GetGenerateUnmanagedCallbacksAttribute();
|
|
if (attr == null || attr.ConstructorArguments.Length != 1)
|
|
{
|
|
// TODO: Report error or throw exception, this is an invalid case and should never be reached
|
|
System.Diagnostics.Debug.Fail("FAILED!");
|
|
continue;
|
|
}
|
|
|
|
var funcStructType = (INamedTypeSymbol?)attr.ConstructorArguments[0].Value;
|
|
if (funcStructType == null)
|
|
{
|
|
// TODO: Report error or throw exception, this is an invalid case and should never be reached
|
|
System.Diagnostics.Debug.Fail("FAILED!");
|
|
continue;
|
|
}
|
|
|
|
var data = new CallbacksData(symbol, funcStructType);
|
|
GenerateInteropMethodImplementations(context, data);
|
|
GenerateUnmanagedCallbacksStruct(context, data);
|
|
}
|
|
}
|
|
|
|
private void GenerateAttribute(GeneratorPostInitializationContext context)
|
|
{
|
|
string source = @"using System;
|
|
|
|
namespace Godot.SourceGenerators.Internal
|
|
{
|
|
internal class GenerateUnmanagedCallbacksAttribute : Attribute
|
|
{
|
|
public Type FuncStructType { get; }
|
|
|
|
public GenerateUnmanagedCallbacksAttribute(Type funcStructType)
|
|
{
|
|
FuncStructType = funcStructType;
|
|
}
|
|
}
|
|
}";
|
|
|
|
context.AddSource("GenerateUnmanagedCallbacksAttribute.generated",
|
|
SourceText.From(source, Encoding.UTF8));
|
|
}
|
|
|
|
private void GenerateInteropMethodImplementations(GeneratorExecutionContext context, CallbacksData data)
|
|
{
|
|
var symbol = data.NativeTypeSymbol;
|
|
|
|
INamespaceSymbol namespaceSymbol = symbol.ContainingNamespace;
|
|
string classNs = namespaceSymbol != null && !namespaceSymbol.IsGlobalNamespace ?
|
|
namespaceSymbol.FullQualifiedNameOmitGlobal() :
|
|
string.Empty;
|
|
bool hasNamespace = classNs.Length != 0;
|
|
bool isInnerClass = symbol.ContainingType != null;
|
|
|
|
var source = new StringBuilder();
|
|
var methodSource = new StringBuilder();
|
|
var methodCallArguments = new StringBuilder();
|
|
var methodSourceAfterCall = new StringBuilder();
|
|
|
|
source.Append(
|
|
@"using System;
|
|
using System.Diagnostics.CodeAnalysis;
|
|
using System.Runtime.CompilerServices;
|
|
using System.Runtime.InteropServices;
|
|
using Godot.Bridge;
|
|
using Godot.NativeInterop;
|
|
|
|
#pragma warning disable CA1707 // Disable warning: Identifiers should not contain underscores
|
|
|
|
");
|
|
|
|
if (hasNamespace)
|
|
{
|
|
source.Append("namespace ");
|
|
source.Append(classNs);
|
|
source.Append("\n{\n");
|
|
}
|
|
|
|
if (isInnerClass)
|
|
{
|
|
var containingType = symbol.ContainingType;
|
|
|
|
while (containingType != null)
|
|
{
|
|
source.Append("partial ");
|
|
source.Append(containingType.GetDeclarationKeyword());
|
|
source.Append(" ");
|
|
source.Append(containingType.NameWithTypeParameters());
|
|
source.Append("\n{\n");
|
|
|
|
containingType = containingType.ContainingType;
|
|
}
|
|
}
|
|
|
|
source.Append("[System.Runtime.CompilerServices.SkipLocalsInit]\n");
|
|
source.Append($"unsafe partial class {symbol.Name}\n");
|
|
source.Append("{\n");
|
|
source.Append($" private static {data.FuncStructSymbol.FullQualifiedNameIncludeGlobal()} _unmanagedCallbacks;\n\n");
|
|
|
|
foreach (var callback in data.Methods)
|
|
{
|
|
methodSource.Clear();
|
|
methodCallArguments.Clear();
|
|
methodSourceAfterCall.Clear();
|
|
|
|
source.Append(" [global::System.Runtime.CompilerServices.MethodImpl(global::System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]\n");
|
|
source.Append($" {SyntaxFacts.GetText(callback.DeclaredAccessibility)} ");
|
|
|
|
if (callback.IsStatic)
|
|
source.Append("static ");
|
|
|
|
source.Append("partial ");
|
|
source.Append(callback.ReturnType.FullQualifiedNameIncludeGlobal());
|
|
source.Append(' ');
|
|
source.Append(callback.Name);
|
|
source.Append('(');
|
|
|
|
for (int i = 0; i < callback.Parameters.Length; i++)
|
|
{
|
|
var parameter = callback.Parameters[i];
|
|
|
|
AppendRefKind(source, parameter.RefKind);
|
|
source.Append(' ');
|
|
source.Append(parameter.Type.FullQualifiedNameIncludeGlobal());
|
|
source.Append(' ');
|
|
source.Append(parameter.Name);
|
|
|
|
if (parameter.RefKind == RefKind.Out)
|
|
{
|
|
// Only assign default if the parameter won't be passed by-ref or copied later.
|
|
if (IsGodotInteropStruct(parameter.Type))
|
|
methodSource.Append($" {parameter.Name} = default;\n");
|
|
}
|
|
|
|
if (IsByRefParameter(parameter))
|
|
{
|
|
if (IsGodotInteropStruct(parameter.Type))
|
|
{
|
|
methodSource.Append(" ");
|
|
AppendCustomUnsafeAsPointer(methodSource, parameter, out string varName);
|
|
methodCallArguments.Append(varName);
|
|
}
|
|
else if (parameter.Type.IsValueType)
|
|
{
|
|
methodSource.Append(" ");
|
|
AppendCopyToStackAndGetPointer(methodSource, parameter, out string varName);
|
|
methodCallArguments.Append($"&{varName}");
|
|
|
|
if (parameter.RefKind is RefKind.Out or RefKind.Ref)
|
|
{
|
|
methodSourceAfterCall.Append($" {parameter.Name} = {varName};\n");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// If it's a by-ref param and we can't get the pointer
|
|
// just pass it by-ref and let it be pinned.
|
|
AppendRefKind(methodCallArguments, parameter.RefKind)
|
|
.Append(' ')
|
|
.Append(parameter.Name);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
methodCallArguments.Append(parameter.Name);
|
|
}
|
|
|
|
if (i < callback.Parameters.Length - 1)
|
|
{
|
|
source.Append(", ");
|
|
methodCallArguments.Append(", ");
|
|
}
|
|
}
|
|
|
|
source.Append(")\n");
|
|
source.Append(" {\n");
|
|
|
|
source.Append(methodSource);
|
|
source.Append(" ");
|
|
|
|
if (!callback.ReturnsVoid)
|
|
{
|
|
if (methodSourceAfterCall.Length != 0)
|
|
source.Append($"{callback.ReturnType.FullQualifiedNameIncludeGlobal()} ret = ");
|
|
else
|
|
source.Append("return ");
|
|
}
|
|
|
|
source.Append($"_unmanagedCallbacks.{callback.Name}(");
|
|
source.Append(methodCallArguments);
|
|
source.Append(");\n");
|
|
|
|
if (methodSourceAfterCall.Length != 0)
|
|
{
|
|
source.Append(methodSourceAfterCall);
|
|
|
|
if (!callback.ReturnsVoid)
|
|
source.Append(" return ret;\n");
|
|
}
|
|
|
|
source.Append(" }\n\n");
|
|
}
|
|
|
|
source.Append("}\n");
|
|
|
|
if (isInnerClass)
|
|
{
|
|
var containingType = symbol.ContainingType;
|
|
|
|
while (containingType != null)
|
|
{
|
|
source.Append("}\n"); // outer class
|
|
|
|
containingType = containingType.ContainingType;
|
|
}
|
|
}
|
|
|
|
if (hasNamespace)
|
|
source.Append("\n}");
|
|
|
|
source.Append("\n\n#pragma warning restore CA1707\n");
|
|
|
|
context.AddSource($"{data.NativeTypeSymbol.FullQualifiedNameOmitGlobal().SanitizeQualifiedNameForUniqueHint()}.generated",
|
|
SourceText.From(source.ToString(), Encoding.UTF8));
|
|
}
|
|
|
|
private void GenerateUnmanagedCallbacksStruct(GeneratorExecutionContext context, CallbacksData data)
|
|
{
|
|
var symbol = data.FuncStructSymbol;
|
|
|
|
INamespaceSymbol namespaceSymbol = symbol.ContainingNamespace;
|
|
string classNs = namespaceSymbol != null && !namespaceSymbol.IsGlobalNamespace ?
|
|
namespaceSymbol.FullQualifiedNameOmitGlobal() :
|
|
string.Empty;
|
|
bool hasNamespace = classNs.Length != 0;
|
|
bool isInnerClass = symbol.ContainingType != null;
|
|
|
|
var source = new StringBuilder();
|
|
|
|
source.Append(
|
|
@"using System.Runtime.InteropServices;
|
|
using Godot.NativeInterop;
|
|
|
|
#pragma warning disable CA1707 // Disable warning: Identifiers should not contain underscores
|
|
|
|
");
|
|
if (hasNamespace)
|
|
{
|
|
source.Append("namespace ");
|
|
source.Append(classNs);
|
|
source.Append("\n{\n");
|
|
}
|
|
|
|
if (isInnerClass)
|
|
{
|
|
var containingType = symbol.ContainingType;
|
|
|
|
while (containingType != null)
|
|
{
|
|
source.Append("partial ");
|
|
source.Append(containingType.GetDeclarationKeyword());
|
|
source.Append(" ");
|
|
source.Append(containingType.NameWithTypeParameters());
|
|
source.Append("\n{\n");
|
|
|
|
containingType = containingType.ContainingType;
|
|
}
|
|
}
|
|
|
|
source.Append("[StructLayout(LayoutKind.Sequential)]\n");
|
|
source.Append($"unsafe partial struct {symbol.Name}\n{{\n");
|
|
|
|
foreach (var callback in data.Methods)
|
|
{
|
|
source.Append(" ");
|
|
source.Append(callback.DeclaredAccessibility == Accessibility.Public ? "public " : "internal ");
|
|
|
|
source.Append("delegate* unmanaged<");
|
|
|
|
foreach (var parameter in callback.Parameters)
|
|
{
|
|
if (IsByRefParameter(parameter))
|
|
{
|
|
if (IsGodotInteropStruct(parameter.Type) || parameter.Type.IsValueType)
|
|
{
|
|
AppendPointerType(source, parameter.Type);
|
|
}
|
|
else
|
|
{
|
|
// If it's a by-ref param and we can't get the pointer
|
|
// just pass it by-ref and let it be pinned.
|
|
AppendRefKind(source, parameter.RefKind)
|
|
.Append(' ')
|
|
.Append(parameter.Type.FullQualifiedNameIncludeGlobal());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
source.Append(parameter.Type.FullQualifiedNameIncludeGlobal());
|
|
}
|
|
|
|
source.Append(", ");
|
|
}
|
|
|
|
source.Append(callback.ReturnType.FullQualifiedNameIncludeGlobal());
|
|
source.Append($"> {callback.Name};\n");
|
|
}
|
|
|
|
source.Append("}\n");
|
|
|
|
if (isInnerClass)
|
|
{
|
|
var containingType = symbol.ContainingType;
|
|
|
|
while (containingType != null)
|
|
{
|
|
source.Append("}\n"); // outer class
|
|
|
|
containingType = containingType.ContainingType;
|
|
}
|
|
}
|
|
|
|
if (hasNamespace)
|
|
source.Append("}\n");
|
|
|
|
source.Append("\n#pragma warning restore CA1707\n");
|
|
|
|
context.AddSource($"{symbol.FullQualifiedNameOmitGlobal().SanitizeQualifiedNameForUniqueHint()}.generated",
|
|
SourceText.From(source.ToString(), Encoding.UTF8));
|
|
}
|
|
|
|
private static bool IsGodotInteropStruct(ITypeSymbol type) =>
|
|
GodotInteropStructs.Contains(type.FullQualifiedNameOmitGlobal());
|
|
|
|
private static bool IsByRefParameter(IParameterSymbol parameter) =>
|
|
parameter.RefKind is RefKind.In or RefKind.Out or RefKind.Ref;
|
|
|
|
private static StringBuilder AppendRefKind(StringBuilder source, RefKind refKind) =>
|
|
refKind switch
|
|
{
|
|
RefKind.In => source.Append("in"),
|
|
RefKind.Out => source.Append("out"),
|
|
RefKind.Ref => source.Append("ref"),
|
|
_ => source,
|
|
};
|
|
|
|
private static void AppendPointerType(StringBuilder source, ITypeSymbol type)
|
|
{
|
|
source.Append(type.FullQualifiedNameIncludeGlobal());
|
|
source.Append('*');
|
|
}
|
|
|
|
private static void AppendCustomUnsafeAsPointer(StringBuilder source, IParameterSymbol parameter,
|
|
out string varName)
|
|
{
|
|
varName = $"{parameter.Name}_ptr";
|
|
|
|
AppendPointerType(source, parameter.Type);
|
|
source.Append(' ');
|
|
source.Append(varName);
|
|
source.Append(" = ");
|
|
|
|
source.Append('(');
|
|
AppendPointerType(source, parameter.Type);
|
|
source.Append(')');
|
|
|
|
if (parameter.RefKind == RefKind.In)
|
|
source.Append("CustomUnsafe.ReadOnlyRefAsPointer(in ");
|
|
else
|
|
source.Append("CustomUnsafe.AsPointer(ref ");
|
|
|
|
source.Append(parameter.Name);
|
|
|
|
source.Append(");\n");
|
|
}
|
|
|
|
private static void AppendCopyToStackAndGetPointer(StringBuilder source, IParameterSymbol parameter,
|
|
out string varName)
|
|
{
|
|
varName = $"{parameter.Name}_copy";
|
|
|
|
source.Append(parameter.Type.FullQualifiedNameIncludeGlobal());
|
|
source.Append(' ');
|
|
source.Append(varName);
|
|
if (parameter.RefKind is RefKind.In or RefKind.Ref)
|
|
{
|
|
source.Append(" = ");
|
|
source.Append(parameter.Name);
|
|
}
|
|
|
|
source.Append(";\n");
|
|
}
|
|
|
|
private static readonly string[] GodotInteropStructs =
|
|
{
|
|
"Godot.NativeInterop.godot_ref",
|
|
"Godot.NativeInterop.godot_variant_call_error",
|
|
"Godot.NativeInterop.godot_variant",
|
|
"Godot.NativeInterop.godot_string",
|
|
"Godot.NativeInterop.godot_string_name",
|
|
"Godot.NativeInterop.godot_node_path",
|
|
"Godot.NativeInterop.godot_signal",
|
|
"Godot.NativeInterop.godot_callable",
|
|
"Godot.NativeInterop.godot_array",
|
|
"Godot.NativeInterop.godot_dictionary",
|
|
"Godot.NativeInterop.godot_packed_byte_array",
|
|
"Godot.NativeInterop.godot_packed_int32_array",
|
|
"Godot.NativeInterop.godot_packed_int64_array",
|
|
"Godot.NativeInterop.godot_packed_float32_array",
|
|
"Godot.NativeInterop.godot_packed_float64_array",
|
|
"Godot.NativeInterop.godot_packed_string_array",
|
|
"Godot.NativeInterop.godot_packed_vector2_array",
|
|
"Godot.NativeInterop.godot_packed_vector3_array",
|
|
"Godot.NativeInterop.godot_packed_color_array",
|
|
};
|
|
}
|