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193 lines (158 loc) · 6.01 KB
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// #define FORCE_REFLECTION_ONLY
#nullable enable
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using SharpGen.Runtime.Trimming;
namespace SharpGen.Runtime;
public static unsafe class TypeDataStorage
{
private static readonly ConcurrentDictionary<Guid, IntPtr> vtblByGuid = new();
static TypeDataStorage()
{
Storage<IUnknown>.Guid = new Guid(0x00000000, 0x0000, 0x0000, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46);
Storage<IInspectable>.Guid = new Guid(0xAF86E2E0, 0xB12D, 0x4C6A, 0x9C, 0x5A, 0xD7, 0xAA, 0x65, 0x10, 0x1E, 0x90);
Storage<IUnknown>.SourceVtbl = ComObjectVtbl.Vtbl;
Storage<IInspectable>.SourceVtbl = InspectableVtbl.Vtbl;
TypeDataRegistrationHelper helper = new();
{
helper.Add(ComObjectVtbl.Vtbl);
helper.Register<IUnknown>();
}
{
helper.Add(ComObjectVtbl.Vtbl);
helper.Add(InspectableVtbl.Vtbl);
helper.Register<IInspectable>();
}
}
[MethodImpl(Utilities.MethodAggressiveOptimization)]
internal static Guid GetGuid<T>() where T : ICallbackable
{
#if !FORCE_REFLECTION_ONLY
ref var guid = ref Storage<T>.Guid;
if (guid != default)
return guid;
#if NETSTANDARD1_3
return guid = typeof(T).GetTypeInfo().GUID;
#else
return guid = typeof(T).GUID;
#endif
#else
#if NETSTANDARD1_3
return typeof(T).GetTypeInfo().GUID;
#else
return typeof(T).GUID;
#endif
#endif
}
internal static void Register<T>(void* vtbl) where T : ICallbackable
{
#if !FORCE_REFLECTION_ONLY
Register(GetGuid<T>(), vtbl);
#endif
}
internal static void Register(Guid guid, void* vtbl) => vtblByGuid[guid] = new IntPtr(vtbl);
internal static IntPtr[]? GetSourceVtbl<T>() where T : ICallbackable
{
#if !FORCE_REFLECTION_ONLY
if (Storage<T>.SourceVtbl is { } storedVtbl)
return storedVtbl;
#endif
return GetSourceVtblFromReflection(typeof(T));
}
private static IntPtr[]? GetSourceVtblFromReflection(
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields | DynamicallyAccessedMemberTypes.NonPublicFields | DynamicallyAccessedMemberTypes.PublicProperties | DynamicallyAccessedMemberTypes.NonPublicProperties)]
#endif
Type type)
{
const string vtbl = "Vtbl";
var vtblAttribute = VtblAttribute.Get(type);
Debug.Assert(vtblAttribute is not null, $"Type {type.FullName} has no Vtbl attribute");
var vtblType = vtblAttribute!.Type;
#if NETSTANDARD1_3
static bool Predicate(MemberInfo x) => x.Name == vtbl;
if (vtblType.GetRuntimeFields().FirstOrDefault(Predicate)?.GetValue(null) is IntPtr[] vtblFieldValue)
{
return vtblFieldValue;
}
if (vtblType.GetRuntimeProperties().FirstOrDefault(Predicate)?.GetValue(null) is IntPtr[] vtblPropertyValue)
{
return vtblPropertyValue;
}
#else
const BindingFlags flags = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy | BindingFlags.Static;
if (vtblType.GetField(vtbl, flags)?.GetValue(null) is IntPtr[] vtblFieldValue)
{
return vtblFieldValue;
}
if (vtblType.GetProperty(vtbl, flags)?.GetValue(null) is IntPtr[] vtblPropertyValue)
{
return vtblPropertyValue;
}
#endif
Debug.Fail($"Type {type.FullName} has no Vtbl field or property");
return null;
}
internal static bool GetTargetVtbl(
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.Interfaces)]
#endif
TypeInfo type, out void* pointer)
{
#if !FORCE_REFLECTION_ONLY
if (vtblByGuid.TryGetValue(type.GUID, out var ptr))
{
pointer = ptr.ToPointer();
return true;
}
#endif
if (GetSourceVtblFromReflection(type.AsType()) is { } sourceVtbl)
{
pointer = RegisterFromReflection(type, sourceVtbl).ToPointer();
return true;
}
pointer = default;
return false;
}
private static IntPtr RegisterFromReflection(
#if NET6_0_OR_GREATER
[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.Interfaces)]
#endif
TypeInfo type, IntPtr[] sourceVtbl)
{
var callbackable = typeof(ICallbackable).GetTypeInfo();
TypeDataRegistrationHelper helper = new();
List<RegisterInheritanceItem> items = new();
foreach (var iface in type.ImplementedInterfaces)
{
var typeInfo = iface.GetTypeInfoWithNestedPreservedInterfaces();
if (callbackable == typeInfo || !callbackable.IsAssignableFrom(typeInfo))
continue;
var iSourceVtbl = GetSourceVtblFromReflection(iface);
if (iSourceVtbl is null)
throw new Exception($"Failed to reflect Vtbl out of an {nameof(ICallbackable)} interface '{iface.FullName}'.");
items.Add(new RegisterInheritanceItem(typeInfo, typeInfo.ImplementedInterfaces.Count(), iSourceVtbl));
}
// TODO: properly sort items by inheritance
// TODO: verify single inheritance
items.Sort(static (x, y) => Comparer<int>.Default.Compare(x.InterfaceCount, y.InterfaceCount));
foreach (var (_, _, iSourceVtbl) in items)
helper.Add(iSourceVtbl);
helper.Add(sourceVtbl);
return helper.Register(type);
}
private record struct RegisterInheritanceItem(TypeInfo Type, int InterfaceCount, IntPtr[] SourceVtbl);
[SuppressMessage("ReSharper", "StaticMemberInGenericType")]
[SuppressMessage("Usage", "CA2211:Non-constant fields should not be visible")]
public static class Storage<T> where T : ICallbackable
{
public static Guid Guid;
public static IntPtr[]? SourceVtbl;
}
}