/
DynamicMethod.cs
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/
DynamicMethod.cs
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//
// System.Reflection.Emit/DynamicMethod.cs
//
// Author:
// Paolo Molaro (lupus@ximian.com)
// Zoltan Varga (vargaz@freemail.hu)
//
// (C) 2003 Ximian, Inc. http://www.ximian.com
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_2_0 || BOOTSTRAP_NET_2_0
using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Globalization;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace System.Reflection.Emit {
#if NET_2_0
[ComVisible (true)]
#endif
public sealed class DynamicMethod : MethodInfo {
#region Sync with reflection.h
private RuntimeMethodHandle mhandle;
private string name;
private Type returnType;
private Type[] parameters;
private MethodAttributes attributes;
private CallingConventions callingConvention;
private Module module;
private bool skipVisibility;
private bool init_locals = true;
private ILGenerator ilgen;
private int nrefs;
private object[] refs;
#endregion
private Delegate deleg;
private MonoMethod method;
private ParameterBuilder[] pinfo;
internal bool creating;
public DynamicMethod (string name, Type returnType, Type[] parameterTypes, Module m) : this (name, returnType, parameterTypes, m, false) {
}
public DynamicMethod (string name, Type returnType, Type[] parameterTypes, Type owner) : this (name, returnType, parameterTypes, owner, false) {
}
public DynamicMethod (string name, Type returnType, Type[] parameterTypes, Module m, bool skipVisibility) : this (name, MethodAttributes.Public | MethodAttributes.Static, CallingConventions.Standard, returnType, parameterTypes, m, skipVisibility) {
}
public DynamicMethod (string name, Type returnType, Type[] parameterTypes, Type owner, bool skipVisibility) : this (name, MethodAttributes.Public | MethodAttributes.Static, CallingConventions.Standard, returnType, parameterTypes, owner, skipVisibility) {
}
public DynamicMethod (string name, MethodAttributes attributes, CallingConventions callingConvention, Type returnType, Type[] parameterTypes, Type owner, bool skipVisibility) : this (name, attributes, callingConvention, returnType, parameterTypes, owner.Module, skipVisibility) {
}
public DynamicMethod (string name, MethodAttributes attributes, CallingConventions callingConvention, Type returnType, Type[] parameterTypes, Module m, bool skipVisibility) {
if (name == null)
throw new ArgumentNullException ("name");
if (name == String.Empty)
throw new ArgumentException ("Name can't be empty", "name");
if (returnType == null)
throw new ArgumentNullException ("returnType");
if (m == null)
throw new ArgumentNullException ("m");
if (returnType.IsByRef)
throw new ArgumentException ("Return type can't be a byref type", "returnType");
if (parameterTypes != null) {
for (int i = 0; i < parameterTypes.Length; ++i)
if (parameterTypes [i] == null)
throw new ArgumentException ("Parameter " + i + " is null", "parameterTypes");
}
this.name = name;
this.attributes = attributes | MethodAttributes.Static;
this.callingConvention = callingConvention;
this.returnType = returnType;
this.parameters = parameterTypes;
this.module = m;
this.skipVisibility = skipVisibility;
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private extern void create_dynamic_method (DynamicMethod m);
private void CreateDynMethod () {
if (mhandle.Value == IntPtr.Zero) {
if (ilgen == null)
throw new InvalidOperationException ("Method '" + name + "' does not have a method body.");
ilgen.label_fixup ();
// Have to create all DynamicMethods referenced by this one
try {
// Used to avoid cycles
creating = true;
if (refs != null) {
for (int i = 0; i < refs.Length; ++i) {
if (refs [i] is DynamicMethod) {
DynamicMethod m = (DynamicMethod)refs [i];
if (!m.creating)
m.CreateDynMethod ();
}
}
}
} finally {
creating = false;
}
create_dynamic_method (this);
}
}
[ComVisible (true)]
public Delegate CreateDelegate (Type delegateType)
{
if (delegateType == null)
throw new ArgumentNullException ("delegateType");
if (deleg != null)
return deleg;
CreateDynMethod ();
deleg = Delegate.CreateDelegate (delegateType, this);
return deleg;
}
[ComVisible (true)]
public Delegate CreateDelegate (Type delegateType, object target)
{
if (delegateType == null)
throw new ArgumentNullException ("delegateType");
CreateDynMethod ();
/* Can't cache the delegate since it is different for each target */
return Delegate.CreateDelegate (delegateType, target, this);
}
public ParameterBuilder DefineParameter (int position, ParameterAttributes attributes, string strParamName)
{
//
// Extension: Mono allows position == 0 for the return attribute
//
if ((position < 0) || (position > parameters.Length))
throw new ArgumentOutOfRangeException ("position");
RejectIfCreated ();
ParameterBuilder pb = new ParameterBuilder (this, position, attributes, strParamName);
if (pinfo == null)
pinfo = new ParameterBuilder [parameters.Length + 1];
pinfo [position] = pb;
return pb;
}
public override MethodInfo GetBaseDefinition () {
return this;
}
[MonoTODO]
public override object[] GetCustomAttributes (bool inherit) {
throw new NotImplementedException ();
}
[MonoTODO]
public override object[] GetCustomAttributes (Type attributeType,
bool inherit) {
throw new NotImplementedException ();
}
public ILGenerator GetILGenerator () {
return GetILGenerator (64);
}
public ILGenerator GetILGenerator (int size) {
if (((GetMethodImplementationFlags () & MethodImplAttributes.CodeTypeMask) !=
MethodImplAttributes.IL) ||
((GetMethodImplementationFlags () & MethodImplAttributes.ManagedMask) !=
MethodImplAttributes.Managed))
throw new InvalidOperationException ("Method body should not exist.");
if (ilgen != null)
return ilgen;
ilgen = new ILGenerator (Module, new DynamicMethodTokenGenerator (this), size);
return ilgen;
}
public override MethodImplAttributes GetMethodImplementationFlags () {
return MethodImplAttributes.IL | MethodImplAttributes.Managed;
}
public override ParameterInfo[] GetParameters () {
if (parameters == null)
return new ParameterInfo [0];
ParameterInfo[] retval = new ParameterInfo [parameters.Length];
for (int i = 0; i < parameters.Length; i++) {
retval [i] = new ParameterInfo (pinfo == null ? null : pinfo [i + 1], parameters [i], this, i + 1);
}
return retval;
}
public override object Invoke (object obj, object[] parameters) {
CreateDynMethod ();
if (method == null)
method = new MonoMethod (mhandle);
return method.Invoke (obj, parameters);
}
public override object Invoke (object obj, BindingFlags invokeAttr,
Binder binder, object[] parameters,
CultureInfo culture) {
CreateDynMethod ();
if (method == null)
method = new MonoMethod (mhandle);
return method.Invoke (obj, parameters);
}
[MonoTODO]
public override bool IsDefined (Type attributeType, bool inherit) {
throw new NotImplementedException ();
}
public override string ToString () {
string parms = "";
ParameterInfo[] p = GetParameters ();
for (int i = 0; i < p.Length; ++i) {
if (i > 0)
parms = parms + ", ";
parms = parms + p [i].ParameterType.Name;
}
return ReturnType.Name+" "+Name+"("+parms+")";
}
public override MethodAttributes Attributes {
get {
return attributes;
}
}
public override CallingConventions CallingConvention {
get {
return callingConvention;
}
}
public override Type DeclaringType {
get {
return null;
}
}
public bool InitLocals {
get {
return init_locals;
}
set {
init_locals = value;
}
}
public override RuntimeMethodHandle MethodHandle {
get {
return mhandle;
}
}
public override Module Module {
get {
return module;
}
}
public override string Name {
get {
return name;
}
}
public override Type ReflectedType {
get {
return null;
}
}
[MonoTODO]
public ParameterInfo ReturnParameter {
get {
throw new NotImplementedException ();
}
}
public override Type ReturnType {
get {
return returnType;
}
}
[MonoTODO]
public override ICustomAttributeProvider ReturnTypeCustomAttributes {
get {
throw new NotImplementedException ();
}
}
public override int MetadataToken {
get {
return 0;
}
}
private void RejectIfCreated () {
if (mhandle.Value != IntPtr.Zero)
throw new InvalidOperationException ("Type definition of the method is complete.");
}
private Exception NotSupported () {
return new NotSupportedException ("The invoked member is not supported on a dynamic method.");
}
internal int AddRef (object reference) {
if (refs == null)
refs = new object [4];
if (nrefs >= refs.Length - 1) {
object [] new_refs = new object [refs.Length * 2];
System.Array.Copy (refs, new_refs, refs.Length);
refs = new_refs;
}
refs [nrefs] = reference;
/* Reserved by the runtime */
refs [nrefs + 1] = null;
nrefs += 2;
return nrefs - 1;
}
}
internal class DynamicMethodTokenGenerator : TokenGenerator {
private DynamicMethod m;
public DynamicMethodTokenGenerator (DynamicMethod m) {
this.m = m;
}
public int GetToken (string str) {
return m.AddRef (str);
}
public int GetToken (MethodInfo method, Type[] opt_param_types) {
throw new InvalidOperationException ();
}
public int GetToken (MemberInfo member) {
return m.AddRef (member);
}
public int GetToken (SignatureHelper helper) {
return m.AddRef (helper);
}
}
}
#endif