public override bool Validate()
{
if (vstate != ValidState.Unvalidated)
{
return(vstate == ValidState.Valid);
}
vstate = ValidState.Valid;
if (!parms.Validate() || !retval.Validate())
{
vstate = ValidState.Invalid;
}
if (vstate == ValidState.Invalid)
{
Console.WriteLine("(in virtual method " + container_type.QualifiedName + "." + Name + ")");
return(false);
}
else
{
// The call string has to be created *after* the params have been validated since the Parameters class contains no elements before validation
call = new ManagedCallString(parms);
return(true);
}
}
public void GenerateCallback (StreamWriter sw)
{
if (!Validate ())
return;
ManagedCallString call = new ManagedCallString (parms, true);
string type = parms [0].CSType + "Implementor";
string name = parms [0].Name;
string call_string = "__obj." + Name + " (" + call + ")";
if (IsGetter)
call_string = "__obj." + (Name.StartsWith ("Get") ? Name.Substring (3) : Name);
else if (IsSetter)
call_string = "__obj." + Name.Substring (3) + " = " + call;
sw.WriteLine ("\t\t[GLib.CDeclCallback]");
sw.WriteLine ("\t\tdelegate " + MarshalReturnType + " " + Name + "Delegate (" + parms.ImportSignature + ");");
sw.WriteLine ();
sw.WriteLine ("\t\tstatic " + MarshalReturnType + " " + Name + "Callback (" + parms.ImportSignature + ")");
sw.WriteLine ("\t\t{");
string unconditional = call.Unconditional ("\t\t\t");
if (unconditional.Length > 0)
sw.WriteLine (unconditional);
sw.WriteLine ("\t\t\ttry {");
sw.WriteLine ("\t\t\t\t" + type + " __obj = GLib.Object.GetObject (" + name + ", false) as " + type + ";");
sw.Write (call.Setup ("\t\t\t\t"));
if (retval.IsVoid) {
if (IsGetter) {
Parameter p = parms [1];
string out_name = p.Name;
if (p.MarshalType != p.CSType)
out_name = "my" + out_name;
sw.WriteLine ("\t\t\t\t" + out_name + " = " + call_string + ";");
} else
sw.WriteLine ("\t\t\t\t" + call_string + ";");
} else
sw.WriteLine ("\t\t\t\t" + retval.CSType + " __result = " + call_string + ";");
bool fatal = parms.HasOutParam || !retval.IsVoid;
sw.Write (call.Finish ("\t\t\t\t"));
if (!retval.IsVoid)
sw.WriteLine ("\t\t\t\treturn " + retval.ToNative ("__result") + ";");
sw.WriteLine ("\t\t\t} catch (Exception e) {");
sw.WriteLine ("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, " + (fatal ? "true" : "false") + ");");
if (fatal) {
sw.WriteLine ("\t\t\t\t// NOTREACHED: above call does not return.");
sw.WriteLine ("\t\t\t\tthrow e;");
}
sw.WriteLine ("\t\t\t}");
sw.WriteLine ("\t\t}");
}
public override bool Validate (LogWriter log)
{
if (vstate != ValidState.Unvalidated)
return vstate == ValidState.Valid;
vstate = ValidState.Valid;
log.Member = Name;
if (!parms.Validate (log) || !retval.Validate (log)) {
vstate = ValidState.Invalid;
return false;
}
call = new ManagedCallString (parms);
return true;
}
public override bool Validate(LogWriter log)
{
if (vstate != ValidState.Unvalidated)
return vstate == ValidState.Valid;
vstate = ValidState.Valid;
log.Member = Name;
if (!parms.Validate (log) || !retval.Validate (log)) {
vstate = ValidState.Invalid;
return false;
}
call = new ManagedCallString (parms);
return true;
}
public string GenWrapper(GenerationInfo gen_info)
{
string wrapper = Name + "Native";
string qualname = MarshalType;
if (!Validate())
{
return(String.Empty);
}
body = new MethodBody(parms);
StreamWriter save_sw = gen_info.Writer;
StreamWriter sw = gen_info.Writer = gen_info.OpenStream(qualname);
sw.WriteLine("namespace " + NS + "Sharp {");
sw.WriteLine();
sw.WriteLine("\tusing System;");
sw.WriteLine("\tusing System.Runtime.InteropServices;");
sw.WriteLine();
sw.WriteLine("#region Autogenerated code");
sw.WriteLine("\t[UnmanagedFunctionPointer (CallingConvention.Cdecl)]");
sw.WriteLine("\tinternal delegate " + retval.MarshalType + " " + wrapper + "(" + parms.CallbackImportSignature + ");");
sw.WriteLine();
GenInvoker(gen_info, sw);
sw.WriteLine("\tinternal class " + Name + "Wrapper {");
sw.WriteLine();
ManagedCallString call = new ManagedCallString(parms, false);
sw.WriteLine("\t\tpublic " + retval.MarshalType + " NativeCallback (" + parms.CallbackImportSignature + ")");
sw.WriteLine("\t\t{");
string unconditional = call.Unconditional("\t\t\t");
if (unconditional.Length > 0)
{
sw.WriteLine(unconditional);
}
sw.WriteLine("\t\t\ttry {");
string call_setup = call.Setup("\t\t\t\t");
if (call_setup.Length > 0)
{
sw.WriteLine(call_setup);
}
if (retval.CSType == "void")
{
sw.WriteLine("\t\t\t\tmanaged ({0});", call);
}
else
{
sw.WriteLine("\t\t\t\t{0} __ret = managed ({1});", retval.CSType, call);
}
string finish = call.Finish("\t\t\t\t");
if (finish.Length > 0)
{
sw.WriteLine(finish);
}
sw.WriteLine("\t\t\t\tif (release_on_call)\n\t\t\t\t\tgch.Free ();");
if (retval.CSType != "void")
{
sw.WriteLine("\t\t\t\treturn {0};", retval.ToNative("__ret"));
}
/* If the function expects one or more "out" parameters(error parameters are excluded) or has a return value different from void and bool, exceptions
* thrown in the managed function have to be considered fatal meaning that an exception is to be thrown and the function call cannot not return
*/
bool fatal = (retval.MarshalType != "void" && retval.MarshalType != "bool") || call.HasOutParam;
sw.WriteLine("\t\t\t} catch (Exception e) {");
sw.WriteLine("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, " + (fatal ? "true" : "false") + ");");
if (fatal)
{
sw.WriteLine("\t\t\t\t// NOTREACHED: Above call does not return.");
sw.WriteLine("\t\t\t\tthrow e;");
}
else if (retval.MarshalType == "bool")
{
sw.WriteLine("\t\t\t\treturn false;");
}
sw.WriteLine("\t\t\t}");
sw.WriteLine("\t\t}");
sw.WriteLine();
sw.WriteLine("\t\tbool release_on_call = false;");
sw.WriteLine("\t\tGCHandle gch;");
sw.WriteLine();
sw.WriteLine("\t\tpublic void PersistUntilCalled ()");
sw.WriteLine("\t\t{");
sw.WriteLine("\t\t\trelease_on_call = true;");
sw.WriteLine("\t\t\tgch = GCHandle.Alloc (this);");
sw.WriteLine("\t\t}");
sw.WriteLine();
sw.WriteLine("\t\tinternal " + wrapper + " NativeDelegate;");
sw.WriteLine("\t\t" + NS + "." + Name + " managed;");
sw.WriteLine();
sw.WriteLine("\t\tpublic " + Name + "Wrapper (" + NS + "." + Name + " managed)");
sw.WriteLine("\t\t{");
sw.WriteLine("\t\t\tthis.managed = managed;");
sw.WriteLine("\t\t\tif (managed != null)");
sw.WriteLine("\t\t\t\tNativeDelegate = new " + wrapper + " (NativeCallback);");
sw.WriteLine("\t\t}");
sw.WriteLine();
sw.WriteLine("\t\tpublic static " + NS + "." + Name + " GetManagedDelegate (" + wrapper + " native)");
sw.WriteLine("\t\t{");
sw.WriteLine("\t\t\tif (native == null)");
sw.WriteLine("\t\t\t\treturn null;");
sw.WriteLine("\t\t\t" + Name + "Wrapper wrapper = (" + Name + "Wrapper) native.Target;");
sw.WriteLine("\t\t\tif (wrapper == null)");
sw.WriteLine("\t\t\t\treturn null;");
sw.WriteLine("\t\t\treturn wrapper.managed;");
sw.WriteLine("\t\t}");
sw.WriteLine("\t}");
sw.WriteLine("#endregion");
sw.WriteLine("}");
sw.Close();
gen_info.Writer = save_sw;
return(NS + "Sharp." + Name + "Wrapper");
}
public void GenerateCallback(StreamWriter sw)
{
if (!Validate())
{
return;
}
ManagedCallString call = new ManagedCallString(parms, true);
string type = parms [0].CSType + "Implementor";
string name = parms [0].Name;
string call_string = "__obj." + Name + " (" + call + ")";
if (IsGetter)
{
call_string = "__obj." + (Name.StartsWith("Get") ? Name.Substring(3) : Name);
}
else if (IsSetter)
{
call_string = "__obj." + Name.Substring(3) + " = " + call;
}
sw.WriteLine("\t\t[GLib.CDeclCallback]");
sw.WriteLine("\t\tdelegate " + MarshalReturnType + " " + Name + "Delegate (" + parms.ImportSignature + ");");
sw.WriteLine();
sw.WriteLine("\t\tstatic " + MarshalReturnType + " " + Name + "Callback (" + parms.ImportSignature + ")");
sw.WriteLine("\t\t{");
string unconditional = call.Unconditional("\t\t\t");
if (unconditional.Length > 0)
{
sw.WriteLine(unconditional);
}
sw.WriteLine("\t\t\ttry {");
sw.WriteLine("\t\t\t\t" + type + " __obj = GLib.Object.GetObject (" + name + ", false) as " + type + ";");
sw.Write(call.Setup("\t\t\t\t"));
if (retval.IsVoid)
{
if (IsGetter)
{
Parameter p = parms [1];
string out_name = p.Name;
if (p.MarshalType != p.CSType)
{
out_name = "my" + out_name;
}
sw.WriteLine("\t\t\t\t" + out_name + " = " + call_string + ";");
}
else
{
sw.WriteLine("\t\t\t\t" + call_string + ";");
}
}
else
{
sw.WriteLine("\t\t\t\t" + retval.CSType + " __result = " + call_string + ";");
}
bool fatal = parms.HasOutParam || !retval.IsVoid;
sw.Write(call.Finish("\t\t\t\t"));
if (!retval.IsVoid)
{
sw.WriteLine("\t\t\t\treturn " + retval.ToNative("__result") + ";");
}
sw.WriteLine("\t\t\t} catch (Exception e) {");
sw.WriteLine("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, " + (fatal ? "true" : "false") + ");");
if (fatal)
{
sw.WriteLine("\t\t\t\t// NOTREACHED: above call does not return.");
sw.WriteLine("\t\t\t\tthrow e;");
}
sw.WriteLine("\t\t\t}");
sw.WriteLine("\t\t}");
}
public string GenWrapper (GenerationInfo gen_info)
{
string wrapper = Name + "Native";
string qualname = MarshalType;
if (!Validate ())
return String.Empty;
body = new MethodBody (parms);
StreamWriter save_sw = gen_info.Writer;
StreamWriter sw = gen_info.Writer = gen_info.OpenStream (qualname, NS);
sw.WriteLine ("namespace " + NS + "Sharp {");
sw.WriteLine ();
sw.WriteLine ("\tusing System;");
sw.WriteLine ("\tusing System.Runtime.InteropServices;");
sw.WriteLine ();
sw.WriteLine ("#region Autogenerated code");
sw.WriteLine ("\t[UnmanagedFunctionPointer (CallingConvention.Cdecl)]");
sw.WriteLine ("\tinternal delegate " + retval.MarshalType + " " + wrapper + "(" + parms.ImportSignature + ");");
sw.WriteLine ();
GenInvoker (gen_info, sw);
sw.WriteLine ("\tinternal class " + Name + "Wrapper {");
sw.WriteLine ();
ManagedCallString call = new ManagedCallString (parms);
sw.WriteLine ("\t\tpublic " + retval.MarshalType + " NativeCallback (" + parms.ImportSignature + ")");
sw.WriteLine ("\t\t{");
string unconditional = call.Unconditional ("\t\t\t");
if (unconditional.Length > 0)
sw.WriteLine (unconditional);
sw.WriteLine ("\t\t\ttry {");
string call_setup = call.Setup ("\t\t\t\t");
if (call_setup.Length > 0)
sw.WriteLine (call_setup);
if (retval.CSType == "void")
sw.WriteLine ("\t\t\t\tmanaged ({0});", call);
else
sw.WriteLine ("\t\t\t\t{0} __ret = managed ({1});", retval.CSType, call);
string finish = call.Finish ("\t\t\t\t");
if (finish.Length > 0)
sw.WriteLine (finish);
sw.WriteLine ("\t\t\t\tif (release_on_call)\n\t\t\t\t\tgch.Free ();");
Parameter cnt = retval.CountParameter;
if (cnt != null)
sw.WriteLine ("\t\t\t\t{0} = {1}{2};", cnt.Name, cnt.CSType == "int" ? String.Empty : "(" + cnt.MarshalType + ")(" + cnt.CSType + ")", "__ret.Length");
if (retval.CSType != "void")
sw.WriteLine ("\t\t\t\treturn {0};", retval.ToNative ("__ret"));
/* If the function expects one or more "out" parameters(error parameters are excluded) or has a return value different from void and bool, exceptions
* thrown in the managed function have to be considered fatal meaning that an exception is to be thrown and the function call cannot not return
*/
bool fatal = (retval.MarshalType != "void" && retval.MarshalType != "bool") || call.HasOutParam;
sw.WriteLine ("\t\t\t} catch (Exception e) {");
sw.WriteLine ("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, " + (fatal ? "true" : "false") + ");");
if (fatal) {
sw.WriteLine ("\t\t\t\t// NOTREACHED: Above call does not return.");
sw.WriteLine ("\t\t\t\tthrow e;");
} else if (retval.MarshalType == "bool") {
sw.WriteLine ("\t\t\t\treturn false;");
}
sw.WriteLine ("\t\t\t}");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
sw.WriteLine ("\t\tbool release_on_call = false;");
sw.WriteLine ("\t\tGCHandle gch;");
sw.WriteLine ();
sw.WriteLine ("\t\tpublic void PersistUntilCalled ()");
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\trelease_on_call = true;");
sw.WriteLine ("\t\t\tgch = GCHandle.Alloc (this);");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
sw.WriteLine ("\t\tinternal " + wrapper + " NativeDelegate;");
sw.WriteLine ("\t\t" + NS + "." + Name + " managed;");
sw.WriteLine ();
sw.WriteLine ("\t\tpublic " + Name + "Wrapper (" + NS + "." + Name + " managed)");
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\tthis.managed = managed;");
sw.WriteLine ("\t\t\tif (managed != null)");
sw.WriteLine ("\t\t\t\tNativeDelegate = new " + wrapper + " (NativeCallback);");
sw.WriteLine ("\t\t}");
sw.WriteLine ();
sw.WriteLine ("\t\tpublic static " + NS + "." + Name + " GetManagedDelegate (" + wrapper + " native)");
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\tif (native == null)");
sw.WriteLine ("\t\t\t\treturn null;");
sw.WriteLine ("\t\t\t" + Name + "Wrapper wrapper = (" + Name + "Wrapper) native.Target;");
sw.WriteLine ("\t\t\tif (wrapper == null)");
sw.WriteLine ("\t\t\t\treturn null;");
sw.WriteLine ("\t\t\treturn wrapper.managed;");
sw.WriteLine ("\t\t}");
sw.WriteLine ("\t}");
sw.WriteLine ("#endregion");
sw.WriteLine ("}");
sw.Close ();
gen_info.Writer = save_sw;
return NS + "Sharp." + Name + "Wrapper";
}
public override bool Validate ()
{
if (vstate != ValidState.Unvalidated)
return vstate == ValidState.Valid;
vstate = ValidState.Valid;
if (!parms.Validate () || !retval.Validate ()) {
vstate = ValidState.Invalid;
}
if (vstate == ValidState.Invalid) {
Console.WriteLine ("(in virtual method " + container_type.QualifiedName + "." + Name + ")");
return false;
} else {
// The call string has to be created *after* the params have been validated since the Parameters class contains no elements before validation
call = new ManagedCallString (parms);
return true;
}
}
private void GenDefaultHandlerDelegate(GenerationInfo gen_info, ClassBase implementor)
{
StreamWriter sw = gen_info.Writer;
StreamWriter glue;
bool use_glue = gen_info.GlueEnabled && implementor == null && ClassFieldName.Length > 0;
string glue_name = String.Empty;
ManagedCallString call = new ManagedCallString(parms, true);
sw.WriteLine("\t\t[UnmanagedFunctionPointer (CallingConvention.Cdecl)]");
sw.WriteLine("\t\tdelegate " + retval.ToNativeType + " " + Name + "VMDelegate (" + parms.CallbackImportSignature + ");\n");
if (use_glue)
{
glue = gen_info.GlueWriter;
glue_name = String.Format("{0}sharp_{1}_override_{2}", container_type.NS.ToLower().Replace(".", "_"), container_type.Name.ToLower(), ClassFieldName);
sw.WriteLine("\t\t[DllImport (\"{0}\", CallingConvention = CallingConvention.Cdecl)]", gen_info.GluelibName);
sw.WriteLine("\t\tstatic extern void {0} (IntPtr gtype, {1}VMDelegate cb);\n", glue_name, Name);
glue.WriteLine("void {0} (GType gtype, gpointer cb);\n", glue_name);
glue.WriteLine("void\n{0} (GType gtype, gpointer cb)", glue_name);
glue.WriteLine("{");
glue.WriteLine("\tGObjectClass *klass = g_type_class_peek (gtype);");
glue.WriteLine("\tif (klass == NULL)");
glue.WriteLine("\t\tklass = g_type_class_ref (gtype);");
glue.WriteLine("\t(({0} *)klass)->{1} = cb;", container_type.CName + "Class", ClassFieldName);
glue.WriteLine("}\n");
}
sw.WriteLine("\t\tstatic {0} {1};\n", Name + "VMDelegate", Name + "VMCallback");
sw.WriteLine("\t\tstatic " + retval.ToNativeType + " " + Name.ToLower() + "_cb (" + parms.CallbackImportSignature + ")");
sw.WriteLine("\t\t{");
string unconditional = call.Unconditional("\t\t\t");
if (unconditional.Length > 0)
{
sw.WriteLine(unconditional);
}
sw.WriteLine("\t\t\ttry {");
sw.WriteLine("\t\t\t\t{0} {1}_managed = GLib.Object.GetObject ({1}, false) as {0};", implementor != null ? implementor.Name : container_type.Name, parms[0].Name);
sw.Write(call.Setup("\t\t\t\t"));
sw.Write("\t\t\t\t{0}", IsVoid ? "" : retval.CSType == retval.ToNativeType ? "return " : retval.CSType + " raw_ret = ");
sw.WriteLine("{2}_managed.{0} ({1});", "On" + Name, call.ToString(), parms[0].Name);
sw.Write(call.Finish("\t\t\t\t"));
if (!IsVoid && retval.CSType != retval.ToNativeType)
{
sw.WriteLine("\t\t\t\treturn {0};", SymbolTable.Table.ToNativeReturn(retval.CType, "raw_ret"));
}
sw.WriteLine("\t\t\t} catch (Exception e) {");
bool fatal = HasOutParams || !IsVoid;
sw.WriteLine("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, " + (fatal ? "true" : "false") + ");");
if (fatal)
{
sw.WriteLine("\t\t\t\t// NOTREACHED: above call doesn't return");
sw.WriteLine("\t\t\t\tthrow e;");
}
sw.WriteLine("\t\t\t}");
sw.WriteLine("\t\t}\n");
sw.WriteLine("\t\tprivate static void Override" + Name + " (GLib.GType gtype)");
sw.WriteLine("\t\t{");
sw.WriteLine("\t\t\tif (" + Name + "VMCallback == null)");
sw.WriteLine("\t\t\t\t" + Name + "VMCallback = new " + Name + "VMDelegate (" + Name.ToLower() + "_cb);");
if (use_glue)
{
sw.WriteLine("\t\t\t{0} (gtype.Val, {1}VMCallback);", glue_name, Name);
}
else
{
sw.WriteLine("\t\t\tOverrideVirtualMethod (gtype, " + CName + ", " + Name + "VMCallback);");
}
sw.WriteLine("\t\t}\n");
}
private void GenDefaultHandlerDelegate (GenerationInfo gen_info, ClassBase implementor)
{
StreamWriter sw = gen_info.Writer;
StreamWriter glue;
bool use_glue = gen_info.GlueEnabled && implementor == null && ClassFieldName.Length > 0;
string glue_name = String.Empty;
ManagedCallString call = new ManagedCallString (parms, true);
sw.WriteLine ("\t\t[GLib.CDeclCallback]");
sw.WriteLine ("\t\tdelegate " + retval.ToNativeType + " " + Name + "VMDelegate (" + parms.ImportSignature + ");\n");
if (use_glue) {
glue = gen_info.GlueWriter;
glue_name = String.Format ("{0}sharp_{1}_override_{2}", container_type.NS.ToLower ().Replace (".", "_"), container_type.Name.ToLower (), ClassFieldName);
sw.WriteLine ("\t\t[DllImport (\"{0}\")]", gen_info.GluelibName);
sw.WriteLine ("\t\tstatic extern void {0} (IntPtr gtype, {1}VMDelegate cb);\n", glue_name, Name);
glue.WriteLine ("void {0} (GType gtype, gpointer cb);\n", glue_name);
glue.WriteLine ("void\n{0} (GType gtype, gpointer cb)", glue_name);
glue.WriteLine ("{");
glue.WriteLine ("\tGObjectClass *klass = g_type_class_peek (gtype);");
glue.WriteLine ("\tif (klass == NULL)");
glue.WriteLine ("\t\tklass = g_type_class_ref (gtype);");
glue.WriteLine ("\t(({0} *)klass)->{1} = cb;", container_type.CName + "Class", ClassFieldName);
glue.WriteLine ("}\n");
}
sw.WriteLine ("\t\tstatic {0} {1};\n", Name + "VMDelegate", Name + "VMCallback");
sw.WriteLine ("\t\tstatic " + retval.ToNativeType + " " + Name.ToLower() + "_cb (" + parms.ImportSignature + ")");
sw.WriteLine ("\t\t{");
string unconditional = call.Unconditional ("\t\t\t");
if (unconditional.Length > 0)
sw.WriteLine (unconditional);
sw.WriteLine ("\t\t\ttry {");
sw.WriteLine ("\t\t\t\t{0} {1}_managed = GLib.Object.GetObject ({1}, false) as {0};", implementor != null ? implementor.Name : container_type.Name, parms[0].Name);
sw.Write (call.Setup ("\t\t\t\t"));
sw.Write ("\t\t\t\t{0}", IsVoid ? "" : retval.CSType == retval.ToNativeType ? "return " : retval.CSType + " raw_ret = ");
sw.WriteLine ("{2}_managed.{0} ({1});", "On" + Name, call.ToString (), parms[0].Name);
sw.Write (call.Finish ("\t\t\t\t"));
if (!IsVoid && retval.CSType != retval.ToNativeType)
sw.WriteLine ("\t\t\t\treturn {0};", SymbolTable.Table.ToNativeReturn (retval.CType, "raw_ret"));
sw.WriteLine ("\t\t\t} catch (Exception e) {");
bool fatal = HasOutParams || !IsVoid;
sw.WriteLine ("\t\t\t\tGLib.ExceptionManager.RaiseUnhandledException (e, " + (fatal ? "true" : "false") + ");");
if (fatal) {
sw.WriteLine ("\t\t\t\t// NOTREACHED: above call doesn't return");
sw.WriteLine ("\t\t\t\tthrow e;");
}
sw.WriteLine ("\t\t\t}");
sw.WriteLine ("\t\t}\n");
sw.WriteLine ("\t\tprivate static void Override" + Name + " (GLib.GType gtype)");
sw.WriteLine ("\t\t{");
sw.WriteLine ("\t\t\tif (" + Name + "VMCallback == null)");
sw.WriteLine ("\t\t\t\t" + Name + "VMCallback = new " + Name + "VMDelegate (" + Name.ToLower() + "_cb);");
if (use_glue)
sw.WriteLine ("\t\t\t{0} (gtype.Val, {1}VMCallback);", glue_name, Name);
else
sw.WriteLine ("\t\t\tOverrideVirtualMethod (gtype, " + CName + ", " + Name + "VMCallback);");
sw.WriteLine ("\t\t}\n");
}