DynamicMethodUtil.cs

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using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Security;
 
namespace IKVM.Runtime
{
 
#if IMPORTER == false && EXPORTER == false
 
    static class DynamicMethodUtil
    {
 
        [SecuritySafeCritical]
        internal static DynamicMethod Create(string name, Type owner, bool nonPublic, Type returnType, Type[] paramTypes)
        {
#if FIRST_PASS
            throw new NotImplementedException();
#else
#if NETFRAMEWORK
            return CreateFramework(name, owner, nonPublic, returnType, paramTypes);
#else
            return CreateCore(name, owner, nonPublic, returnType, paramTypes);
#endif
#endif
        }
 
 
#if NETFRAMEWORK
 
        static readonly Lazy<Module> dynamicModule = new Lazy<Module>(CreateDynamicModule, true);
 
        static Module CreateDynamicModule()
        {
            var name = RuntimeUtil.IsMono ? "__DynamicMethodModule" : "__<DynamicMethodModule>";
            var dynamicAssembly = AppDomain.CurrentDomain.DefineDynamicAssembly(new AssemblyName(name), AssemblyBuilderAccess.RunAndCollect);
            return dynamicAssembly.DefineDynamicModule(name);
        }
 
        static DynamicMethod CreateFramework(string name, Type owner, bool nonPublic, Type returnType, Type[] paramTypes)
        {
            try
            {
                return new DynamicMethod(name, MethodAttributes.Public | MethodAttributes.Static, CallingConventions.Standard, returnType, paramTypes, dynamicModule.Value, true);
            }
            catch (SecurityException)
            {
                return new DynamicMethod(name, returnType, paramTypes, nonPublic);
            }
        }
 
#else
 
    static DynamicMethod CreateCore(string name, Type owner, bool nonPublic, Type returnType, Type[] paramTypes)
    {
        if (ReflectUtil.CanOwnDynamicMethod(owner))
            return new DynamicMethod(name, returnType, paramTypes, owner);
        else
            return new DynamicMethod(name, MethodAttributes.Public | MethodAttributes.Static, CallingConventions.Standard, returnType, paramTypes, owner.Module, true);
    }
 
#endif
 
    }
 
#endif
 
}