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/*
Copyright (C) 2009 Jeroen Frijters
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jeroen Frijters
jeroen@frijters.net
*/
using System;
#if STATIC_COMPILER
using IKVM.Reflection;
using IKVM.Reflection.Emit;
using Type = IKVM.Reflection.Type;
#else
using System.Reflection;
using System.Reflection.Emit;
#endif
using System.Diagnostics;
namespace IKVM.Internal
{
static class RuntimeHelperTypes
{
private static Type classLiteralType;
private static FieldInfo classLiteralField;
internal static FieldInfo GetClassLiteralField(Type type)
{
Debug.Assert(type != Types.Void);
if (classLiteralType == null)
{
#if STATIC_COMPILER
classLiteralType = JVM.CoreAssembly.GetType("ikvm.internal.ClassLiteral`1");
#elif !FIRST_PASS
classLiteralType = typeof(ikvm.@internal.ClassLiteral<>);
#endif
}
#if !STATIC_COMPILER
if (!IsTypeBuilder(type))
{
return classLiteralType.MakeGenericType(type).GetField("Value", BindingFlags.Public | BindingFlags.Static);
}
#endif
if (classLiteralField == null)
{
classLiteralField = classLiteralType.GetField("Value", BindingFlags.Public | BindingFlags.Static);
}
return TypeBuilder.GetField(classLiteralType.MakeGenericType(type), classLiteralField);
}
private static bool IsTypeBuilder(Type type)
{
return type is TypeBuilder || (type.HasElementType && IsTypeBuilder(type.GetElementType()));
}
#if STATIC_COMPILER
internal static void Create(CompilerClassLoader ccl)
{
EmitClassLiteral(ccl);
}
private static void EmitClassLiteral(CompilerClassLoader ccl)
{
TypeBuilder tb = ccl.GetTypeWrapperFactory().ModuleBuilder.DefineType("ikvm.internal.ClassLiteral`1", TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.Abstract | TypeAttributes.Class | TypeAttributes.BeforeFieldInit);
GenericTypeParameterBuilder typeParam = tb.DefineGenericParameters("T")[0];
Type classType = CoreClasses.java.lang.Class.Wrapper.TypeAsSignatureType;
classLiteralField = tb.DefineField("Value", classType, FieldAttributes.Public | FieldAttributes.Static | FieldAttributes.InitOnly);
CodeEmitter ilgen = CodeEmitter.Create(ReflectUtil.DefineTypeInitializer(tb));
ilgen.Emit(OpCodes.Ldtoken, typeParam);
ilgen.Emit(OpCodes.Call, Types.Type.GetMethod("GetTypeFromHandle", new Type[] { Types.RuntimeTypeHandle }));
MethodWrapper mw = CoreClasses.java.lang.Class.Wrapper.GetMethodWrapper("<init>", "(Lcli.System.Type;)V", false);
mw.Link();
mw.EmitNewobj(ilgen);
ilgen.Emit(OpCodes.Stsfld, classLiteralField);
ilgen.Emit(OpCodes.Ret);
ilgen.DoEmit();
classLiteralType = tb.CreateType();
}
#endif
}
}
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