void Specialize(AutoIndentStringBuilder sb, ObjCMethod method, List<Exception> exceptions)
{
var isGeneric = method.DeclaringType.IsGeneric;
switch (method.CurrentTrampoline) {
case Trampoline.Retain:
sb.WriteLine ("-(id) retain");
sb.WriteLine ("{");
sb.WriteLine ("return xamarin_retain_trampoline (self, _cmd);");
sb.WriteLine ("}");
sb.WriteLine ();
return;
case Trampoline.Release:
sb.WriteLine ("-(void) release");
sb.WriteLine ("{");
sb.WriteLine ("xamarin_release_trampoline (self, _cmd);");
sb.WriteLine ("}");
sb.WriteLine ();
return;
case Trampoline.GetGCHandle:
sb.WriteLine ("-(int) xamarinGetGCHandle");
sb.WriteLine ("{");
sb.WriteLine ("return __monoObjectGCHandle.gc_handle;");
sb.WriteLine ("}");
sb.WriteLine ();
return;
case Trampoline.SetGCHandle:
sb.WriteLine ("-(void) xamarinSetGCHandle: (int) gc_handle");
sb.WriteLine ("{");
sb.WriteLine ("__monoObjectGCHandle.gc_handle = gc_handle;");
sb.WriteLine ("__monoObjectGCHandle.native_object = self;");
sb.WriteLine ("}");
sb.WriteLine ();
return;
case Trampoline.Constructor:
if (isGeneric) {
sb.WriteLine (GetObjCSignature (method, exceptions));
sb.WriteLine ("{");
sb.WriteLine ("xamarin_throw_product_exception (4126, \"Cannot construct an instance of the type '{0}' from Objective-C because the type is generic.\");\n", method.DeclaringType.Type.FullName.Replace ("/", "+"));
sb.WriteLine ("return self;");
sb.WriteLine ("}");
return;
}
break;
#if MONOMAC
case Trampoline.CopyWithZone1:
sb.AppendLine ("-(id) copyWithZone: (NSZone *) zone");
sb.AppendLine ("{");
sb.AppendLine ("id rv;");
sb.AppendLine ("int gchandle;");
sb.AppendLine ();
sb.AppendLine ("gchandle = xamarin_get_gchandle_with_flags (self);");
sb.AppendLine ("if (gchandle != 0)");
sb.Indent ().AppendLine ("xamarin_set_gchandle (self, 0);").Unindent ();
// Call the base class implementation
sb.AppendLine ("rv = [super copyWithZone: zone];");
sb.AppendLine ();
sb.AppendLine ("if (gchandle != 0)");
sb.Indent ().AppendLine ("xamarin_set_gchandle (self, gchandle);").Unindent ();
sb.AppendLine ();
sb.AppendLine ("return rv;");
sb.AppendLine ("}");
return;
case Trampoline.CopyWithZone2:
sb.AppendLine ("-(id) copyWithZone: (NSZone *) zone");
sb.AppendLine ("{");
sb.AppendLine ("return xamarin_copyWithZone_trampoline2 (self, _cmd, zone);");
sb.AppendLine ("}");
return;
#endif
}
var rettype = string.Empty;
var returntype = method.Method.ReturnType;
var isStatic = method.IsStatic;
var isInstanceCategory = method.IsCategoryInstance;
var isCtor = false;
var num_arg = method.Method.Parameters.Count;
var descriptiveMethodName = method.DescriptiveMethodName;
var name = GetUniqueTrampolineName ("native_to_managed_trampoline_" + descriptiveMethodName);
var isVoid = returntype.FullName == "System.Void";
var arguments = new List<string> ();
var merge_bodies = true;
switch (method.CurrentTrampoline) {
case Trampoline.None:
case Trampoline.Normal:
case Trampoline.Static:
case Trampoline.Single:
case Trampoline.Double:
case Trampoline.Long:
case Trampoline.StaticLong:
case Trampoline.StaticDouble:
case Trampoline.StaticSingle:
case Trampoline.X86_DoubleABI_StaticStretTrampoline:
case Trampoline.X86_DoubleABI_StretTrampoline:
case Trampoline.StaticStret:
case Trampoline.Stret:
switch (returntype.FullName) {
case "System.Int64":
rettype = "long long";
break;
case "System.UInt64":
rettype = "unsigned long long";
break;
case "System.Single":
rettype = "float";
break;
case "System.Double":
rettype = "double";
break;
default:
rettype = ToObjCParameterType (returntype, descriptiveMethodName, exceptions, method.Method);
break;
}
break;
case Trampoline.Constructor:
rettype = "id";
isCtor = true;
break;
default:
return;
}
comment.Clear ();
nslog_start.Clear ();
nslog_end.Clear ();
copyback.Clear ();
invoke.Clear ();
setup_call_stack.Clear ();
body.Clear ();
setup_return.Clear ();
counter++;
body.WriteLine ("{");
var indent = merge_bodies ? sb.Indentation : sb.Indentation + 1;
body.Indentation = indent;
copyback.Indentation = indent;
invoke.Indentation = indent;
setup_call_stack.Indentation = indent;
setup_return.Indentation = indent;
// A comment describing the managed signature
if (trace) {
nslog_start.Indentation = sb.Indentation;
comment.Indentation = sb.Indentation;
nslog_end.Indentation = sb.Indentation;
comment.AppendFormat ("// {2} {0}.{1} (", method.Method.DeclaringType.FullName, method.Method.Name, method.Method.ReturnType.FullName);
for (int i = 0; i < num_arg; i++) {
var param = method.Method.Parameters [i];
if (i > 0)
comment.Append (", ");
comment.AppendFormat ("{0} {1}", param.ParameterType.FullName, param.Name);
}
comment.AppendLine (")");
comment.AppendLine ("// ArgumentSemantic: {0} IsStatic: {1} Selector: '{2}' Signature: '{3}'", method.ArgumentSemantic, method.IsStatic, method.Selector, method.Signature);
}
// a couple of debug printfs
if (trace) {
StringBuilder args = new StringBuilder ();
nslog_start.AppendFormat ("NSLog (@\"{0} (this: %@, sel: %@", name);
for (int i = 0; i < num_arg; i++) {
var type = method.Method.Parameters [i].ParameterType;
bool isRef = type.IsByReference;
if (isRef)
type = type.GetElementType ();
var td = type.Resolve ();
nslog_start.AppendFormat (", {0}: ", method.Method.Parameters [i].Name);
args.Append (", ");
switch (type.FullName) {
case "System.Drawing.RectangleF":
if (isRef) {
nslog_start.Append ("%p : %@");
#if MMP
args.AppendFormat ("p{0}, p{0} ? NSStringFromRect (*p{0}) : @\"NULL\"", i);
#else
args.AppendFormat ("p{0}, p{0} ? NSStringFromCGRect (*p{0}) : @\"NULL\"", i);
#endif
} else {
nslog_start.Append ("%@");
#if MMP
args.AppendFormat ("NSStringFromRect (p{0})", i);
#else
args.AppendFormat ("NSStringFromCGRect (p{0})", i);
#endif
}
break;
case "System.Drawing.PointF":
if (isRef) {
nslog_start.Append ("%p: %@");
#if MMP
args.AppendFormat ("p{0}, p{0} ? NSStringFromPoint (*p{0}) : @\"NULL\"", i);
#else
args.AppendFormat ("p{0}, p{0} ? NSStringFromCGPoint (*p{0}) : @\"NULL\"", i);
#endif
} else {
nslog_start.Append ("%@");
#if MMP
args.AppendFormat ("NSStringFromPoint (p{0})", i);
#else
args.AppendFormat ("NSStringFromCGPoint (p{0})", i);
#endif
}
break;
default:
bool unknown;
var spec = GetPrintfFormatSpecifier (td, out unknown);
if (unknown) {
nslog_start.AppendFormat ("%{0}", spec);
args.AppendFormat ("&p{0}", i);
} else if (isRef) {
nslog_start.AppendFormat ("%p *= %{0}", spec);
args.AppendFormat ("p{0}, *p{0}", i);
} else {
nslog_start.AppendFormat ("%{0}", spec);
args.AppendFormat ("p{0}", i);
}
break;
}
}
string ret_arg = string.Empty;
nslog_end.Append (nslog_start.ToString ());
if (!isVoid) {
bool unknown;
var spec = GetPrintfFormatSpecifier (method.Method.ReturnType.Resolve (), out unknown);
if (!unknown) {
nslog_end.Append (" ret: %");
nslog_end.Append (spec);
ret_arg = ", res";
}
}
nslog_end.Append (") END\", self, NSStringFromSelector (_cmd)");
nslog_end.Append (args.ToString ());
nslog_end.Append (ret_arg);
nslog_end.AppendLine (");");
nslog_start.Append (") START\", self, NSStringFromSelector (_cmd)");
nslog_start.Append (args.ToString ());
nslog_start.AppendLine (");");
}
// prepare the parameters
var baseMethod = GetBaseMethodInTypeHierarchy (method.Method);
for (int i = 0; i < num_arg; i++) {
var param = method.Method.Parameters [i];
var paramBase = baseMethod.Parameters [i];
var type = method.Parameters [i];
var objctype = ToObjCParameterType (type, descriptiveMethodName, exceptions, method.Method);
var original_objctype = objctype;
var isRef = type.IsByReference;
var isOut = param.IsOut || paramBase.IsOut;
var isArray = type is ArrayType;
var isNativeEnum = false;
var td = type.Resolve ();
var isVariadic = i + 1 == num_arg && method.IsVariadic;
if (isRef) {
type = type.GetElementType ();
td = type.Resolve ();
original_objctype = ToObjCParameterType (type, descriptiveMethodName, exceptions, method.Method);
objctype = ToObjCParameterType (type, descriptiveMethodName, exceptions, method.Method) + "*";
} else if (td.IsEnum) {
type = SharedStatic.GetEnumUnderlyingType (td);
isNativeEnum = IsDualBuild && SharedStatic.HasAttribute (td, ObjCRuntime, StringConstants.NativeAttribute);
td = type.Resolve ();
}
switch (type.FullName) {
case "System.Int64":
case "System.UInt64":
// We already show MT4145 if the underlying enum type isn't a long or ulong
if (isNativeEnum) {
string tp;
string ntp;
if (type.FullName == "System.UInt64") {
tp = "unsigned long long";
ntp = "NSUInteger";
} else {
tp = "long long";
ntp = "NSInteger";
}
if (isRef || isOut) {
setup_call_stack.AppendLine ("{1} nativeEnum{0} = 0;", i, tp);
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &nativeEnum{0};", i);
copyback.AppendLine ("*p{0} = ({1}) nativeEnum{0};", ntp);
} else {
setup_call_stack.AppendLine ("{1} nativeEnum{0} = p{0};", i, tp);
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &nativeEnum{0};", i);
}
break;
}
goto case "System.SByte";
case "System.SByte":
case "System.Byte":
case "System.Char":
case "System.Int16":
case "System.UInt16":
case "System.Int32":
case "System.UInt32":
case "System.Single":
case "System.Double":
case "System.Boolean":
if (isRef || isOut) {
// The isOut semantics isn't quite correct here: we pass the actual input value to managed code.
// In theory we should create a temp location and then use a writeback when done instead.
// This should be safe though, since managed code (at least C#) can't actually observe the value.
setup_call_stack.AppendLine ("arg_ptrs [{0}] = p{0};", i);
} else {
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &p{0};", i);
}
break;
case "System.IntPtr":
if (isVariadic) {
setup_call_stack.AppendLine ("va_list a{0};", i);
setup_call_stack.AppendLine ("va_start (a{0}, p{1});", i, i - 1);
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &a{0};", i);
copyback.AppendLine ("va_end (a{0});", i);
} else if (isOut) {
setup_call_stack.AppendLine ("{1} a{0} = 0;", i, objctype);
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &a{0};", i);
copyback.AppendLine ("*p{0} = a{0};", i);
} else if (isRef) {
setup_call_stack.AppendLine ("arg_ptrs [{0}] = p{0};", i);
} else {
setup_call_stack.AppendLine ("{1} a{0} = p{0};", i, original_objctype);
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &a{0};", i);
}
break;
case "ObjCRuntime.Selector":
case CompatNamespace + ".ObjCRuntime.Selector":
if (isRef) {
if (isOut) {
setup_call_stack.AppendLine ("void *a{0} = NULL;", i);
} else {
setup_call_stack.AppendLine ("void *a{0} = *p{0} ? xamarin_get_selector (*p{0}) : NULL;", i);
}
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &a{0};", i);
copyback.AppendLine ("*p{0} = a{0};", i);
} else {
setup_call_stack.AppendLine ("arg_ptrs [{0}] = p{0} ? xamarin_get_selector (p{0}) : NULL;", i);
}
break;
case "ObjCRuntime.Class":
case CompatNamespace + ".ObjCRuntime.Class":
if (isRef) {
if (isOut) {
setup_call_stack.AppendLine ("void *a{0} = NULL;", i);
} else {
setup_call_stack.AppendLine ("void *a{0} = *p{0} ? xamarin_get_class (*p{0}) : NULL;", i);
}
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &a{0};", i);
copyback.AppendLine ("*p{0} = a{0};", i);
} else {
setup_call_stack.AppendLine ("arg_ptrs [{0}] = p{0} ? xamarin_get_class (p{0}) : NULL;", i);
}
break;
case "System.String":
// This should always be an NSString and never char*
if (isRef) {
if (isOut) {
setup_call_stack.AppendLine ("MonoString *a{0} = NULL;", i);
} else {
setup_call_stack.AppendLine ("MonoString *a{0} = *p{0} ? mono_string_new (mono_domain_get (), [(*p{0}) UTF8String]) : NULL;", i);
}
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &a{0};", i);
copyback.AppendLine ("char *str{0} = mono_string_to_utf8 (a{0});", i);
copyback.AppendLine ("*p{0} = [[NSString alloc] initWithUTF8String:str{0}];", i);
copyback.AppendLine ("[*p{0} autorelease];", i);
copyback.AppendLine ("mono_free (str{0});", i);
} else {
setup_call_stack.AppendLine ("arg_ptrs [{0}] = p{0} ? mono_string_new (mono_domain_get (), [p{0} UTF8String]) : NULL;", i);
}
break;
default:
if (isArray) {
var elementType = ((ArrayType)type).ElementType;
var isNativeObject = false;
setup_call_stack.AppendLine ("if (p{0}) {{", i);
setup_call_stack.AppendLine ("NSArray *arr = (NSArray *) p{0};", i);
if (Driver.EnableDebug)
setup_call_stack.AppendLine ("xamarin_check_objc_type (p{0}, [NSArray class], _cmd, self, {0}, managed_method);", i);
setup_call_stack.AppendLine ("MonoClass *e_class;");
setup_call_stack.AppendLine ("MonoArray *marr;");
setup_call_stack.AppendLine ("MonoType *p;");
setup_call_stack.AppendLine ("int j;", i);
setup_call_stack.AppendLine ("p = xamarin_get_parameter_type (managed_method, {0});", i);
setup_call_stack.AppendLine ("e_class = mono_class_get_element_class (mono_class_from_mono_type (p));");
setup_call_stack.AppendLine ("marr = mono_array_new (mono_domain_get (), e_class, [arr count]);", i);
setup_call_stack.AppendLine ("for (j = 0; j < [arr count]; j++) {{", i);
if (elementType.FullName == "System.String") {
setup_call_stack.AppendLine ("NSString *sv = (NSString *) [arr objectAtIndex: j];", i);
setup_call_stack.AppendLine ("mono_array_set (marr, MonoString *, j, mono_string_new (mono_domain_get (), [sv UTF8String]));", i);
} else if (IsNSObject (elementType) || (elementType.Namespace == "System" && elementType.Name == "Object") || (isNativeObject = SharedStatic.IsNativeObject (elementType))) {
setup_call_stack.AppendLine ("NSObject *nobj = [arr objectAtIndex: j];");
setup_call_stack.AppendLine ("MonoObject *mobj{0} = NULL;", i);
setup_call_stack.AppendLine ("if (nobj) {");
if (isNativeObject) {
TypeDefinition nativeObjType = elementType.Resolve ();
if (nativeObjType.IsInterface) {
var wrapper_type = GetProtocolAttributeWrapperType (nativeObjType);
if (wrapper_type == null)
throw ErrorHelper.CreateError (4125, "The registrar found an invalid type '{0}' in signature for method '{1}': " +
"The interface must have a Protocol attribute specifying its wrapper type.",
td.FullName, descriptiveMethodName);
nativeObjType = wrapper_type.Resolve ();
}
// verify that the type has a ctor with two parameters
if (!HasIntPtrBoolCtor (nativeObjType))
throw ErrorHelper.CreateError (4103,
"The registrar found an invalid type `{0}` in signature for method `{1}`: " +
"The type implements INativeObject, but does not have a constructor that takes " +
"two (IntPtr, bool) arguments.", nativeObjType.FullName, descriptiveMethodName);
if (nativeObjType.IsInterface) {
setup_call_stack.AppendLine ("mobj{0} = xamarin_get_inative_object_static (nobj, false, \"{1}\", \"{2}\");", i, GetAssemblyQualifiedName (nativeObjType), GetAssemblyQualifiedName (elementType));
} else {
// find the MonoClass for this parameter
setup_call_stack.AppendLine ("MonoType *type{0};", i);
setup_call_stack.AppendLine ("type{0} = xamarin_get_parameter_type (managed_method, {0});", i);
setup_call_stack.AppendLine ("mobj{0} = xamarin_get_inative_object_dynamic (nobj, false, mono_type_get_object (mono_domain_get (), mono_class_get_type (e_class)));", i);
}
} else {
setup_call_stack.AppendLine ("mobj{0} = xamarin_get_managed_object_for_ptr_fast (nobj);", i);
}
if (Driver.EnableDebug) {
setup_call_stack.AppendLine ("xamarin_verify_parameter (mobj{0}, _cmd, self, nobj, {0}, e_class, managed_method);", i);
}
setup_call_stack.AppendLine ("}");
setup_call_stack.AppendLine ("mono_array_set (marr, MonoObject *, j, mobj{0});", i);
} else {
throw ErrorHelper.CreateError (4111, method.Method, "The registrar cannot build a signature for type `{0}' in method `{1}`.", type.FullName, descriptiveMethodName);
}
setup_call_stack.AppendLine ("}");
setup_call_stack.AppendLine ("arg_ptrs [{0}] = marr;", i);
setup_call_stack.AppendLine ("} else {");
setup_call_stack.AppendLine ("arg_ptrs [{0}] = NULL;", i);
setup_call_stack.AppendLine ("}");
} else if (IsNSObject (type)) {
if (isRef) {
setup_call_stack.AppendLine ("MonoObject *mobj{0} = NULL;", i);
if (!isOut) {
setup_call_stack.AppendLine ("NSObject *nsobj{0} = *(NSObject **) p{0};", i);
setup_call_stack.AppendLine ("if (nsobj{0}) {{", i);
setup_call_stack.AppendLine ("MonoType *paramtype{0} = xamarin_get_parameter_type (managed_method, {0});", i);
setup_call_stack.AppendLine ("mobj{0} = xamarin_get_nsobject_with_type_for_ptr (nsobj{0}, false, paramtype{0});", i);
if (Driver.EnableDebug) {
setup_call_stack.AppendLine ("xamarin_verify_parameter (mobj{0}, _cmd, self, nsobj{0}, {0}, mono_class_from_mono_type (paramtype{0}), managed_method);", i);
}
setup_call_stack.AppendLine ("}");
}
// argument semantics?
setup_call_stack.AppendLine ("arg_ptrs [{0}] = (int *) &mobj{0};", i);
copyback.AppendLine ("void * handle{0} = NULL;", i);
copyback.AppendLine ("if (mobj{0} != NULL)", i);
copyback.AppendLine ("handle{0} = xamarin_get_nsobject_handle (mobj{0});", i);
copyback.AppendLine ("*p{0} = (id) handle{0};", i);
} else {
setup_call_stack.AppendLine ("NSObject *nsobj{0} = (NSObject *) p{0};", i);
if (method.ArgumentSemantic == ArgumentSemantic.Copy) {
setup_call_stack.AppendLine ("nsobj{0} = [nsobj{0} copy];", i);
setup_call_stack.AppendLine ("[nsobj{0} autorelease];", i);
}
setup_call_stack.AppendLine ("MonoObject *mobj{0} = NULL;", i);
setup_call_stack.AppendLine ("int32_t created{0} = false;", i);
setup_call_stack.AppendLine ("if (nsobj{0}) {{", i);
setup_call_stack.AppendLine ("MonoType *paramtype{0} = xamarin_get_parameter_type (managed_method, {0});", i);
setup_call_stack.AppendLine ("mobj{0} = xamarin_get_nsobject_with_type_for_ptr_created (nsobj{0}, false, paramtype{0}, &created{0});", i);
if (Driver.EnableDebug) {
setup_call_stack.AppendLine ("xamarin_verify_parameter (mobj{0}, _cmd, self, nsobj{0}, {0}, mono_class_from_mono_type (paramtype{0}), managed_method);", i);
}
setup_call_stack.AppendLine ("}");
setup_call_stack.AppendLine ("arg_ptrs [{0}] = mobj{0};", i);
if (SharedStatic.HasAttribute (paramBase, ObjCRuntime, StringConstants.TransientAttribute)) {
copyback.AppendLine ("if (created{0})", i);
copyback.Indentation++;
copyback.AppendLine ("xamarin_dispose (mobj{0});", i);
copyback.Indentation--;
}
}
} else if (SharedStatic.IsNativeObject (td)) {
TypeDefinition nativeObjType = td;
if (td.IsInterface) {
var wrapper_type = GetProtocolAttributeWrapperType (td);
if (wrapper_type == null)
throw ErrorHelper.CreateError (4125, "The registrar found an invalid type '{0}' in signature for method '{1}': " +
"The interface must have a Protocol attribute specifying its wrapper type.",
td.FullName, descriptiveMethodName);
nativeObjType = wrapper_type.Resolve ();
}
// verify that the type has a ctor with two parameters
if (!HasIntPtrBoolCtor (nativeObjType))
throw ErrorHelper.CreateError (4103,
"The registrar found an invalid type `{0}` in signature for method `{1}`: " +
"The type implements INativeObject, but does not have a constructor that takes " +
"two (IntPtr, bool) arguments.", nativeObjType.FullName, descriptiveMethodName);
if (!td.IsInterface) {
// find the MonoClass for this parameter
setup_call_stack.AppendLine ("MonoType *type{0};", i);
setup_call_stack.AppendLine ("type{0} = xamarin_get_parameter_type (managed_method, {0});", i);
}
if (isRef) {
setup_call_stack.AppendLine ("MonoObject *inobj{0};", i);
if (isOut) {
setup_call_stack.AppendLine ("inobj{0} = NULL;", i);
} else if (td.IsInterface) {
setup_call_stack.AppendLine ("inobj{0} = xamarin_get_inative_object_static (*p{0}, false, \"{1}\", \"{2}\");", i, GetAssemblyQualifiedName (nativeObjType), GetAssemblyQualifiedName (td));
} else {
setup_call_stack.AppendLine ("inobj{0} = xamarin_get_inative_object_dynamic (*p{0}, false, mono_type_get_object (mono_domain_get (), type{0}));", i);
}
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &inobj{0};", i);
copyback.AppendLine ("id handle{0} = nil;", i);
copyback.AppendLine ("if (inobj{0} != NULL)", i);
copyback.AppendLine ("handle{0} = xamarin_get_handle_for_inativeobject (inobj{0});", i);
copyback.AppendLine ("*p{0} = (id) handle{0};", i);
} else {
if (td.IsInterface) {
setup_call_stack.AppendLine ("arg_ptrs [{0}] = xamarin_get_inative_object_static (p{0}, false, \"{1}\", \"{2}\");", i, GetAssemblyQualifiedName (nativeObjType), GetAssemblyQualifiedName (td));
} else {
setup_call_stack.AppendLine ("arg_ptrs [{0}] = xamarin_get_inative_object_dynamic (p{0}, false, mono_type_get_object (mono_domain_get (), type{0}));", i);
}
}
} else if (type.IsValueType) {
if (isRef || isOut) {
// The isOut semantics isn't quite correct here: we pass the actual input value to managed code.
// In theory we should create a temp location and then use a writeback when done instead.
// This should be safe though, since managed code (at least C#) can't actually observe the value.
setup_call_stack.AppendLine ("arg_ptrs [{0}] = p{0};", i);
} else {
setup_call_stack.AppendLine ("arg_ptrs [{0}] = &p{0};", i);
}
} else if (td.BaseType.FullName == "System.MulticastDelegate") {
if (isRef) {
throw ErrorHelper.CreateError (4110,
"The registrar cannot marshal the out parameter of type `{0}` in signature for method `{1}`.",
type.FullName, descriptiveMethodName);
} else {
// Bug #4858 (also related: #4718)
setup_call_stack.AppendLine ("if (p{0}) {{", i);
setup_call_stack.AppendLine ("arg_ptrs [{0}] = (void *) xamarin_get_delegate_for_block_parameter (managed_method, {0}, p{0});", i);
setup_call_stack.AppendLine ("} else {");
setup_call_stack.AppendLine ("arg_ptrs [{0}] = NULL;", i);
setup_call_stack.AppendLine ("}");
}
} else {
throw ErrorHelper.CreateError (4105,
"The registrar cannot marshal the parameter of type `{0}` in signature for method `{1}`.",
type.FullName, descriptiveMethodName);
}
break;
}
}
// the actual invoke
if (isCtor) {
invoke.AppendLine ("mthis = mono_object_new (mono_domain_get (), mono_method_get_class (managed_method));", counter);
invoke.AppendLine ("uint8_t flags = NSObjectFlagsNativeRef;");
invoke.AppendLine ("xamarin_set_nsobject_handle (mthis, self);");
invoke.AppendLine ("xamarin_set_nsobject_flags (mthis, flags);");
}
if (!isVoid)
invoke.AppendFormat ("{0} retval = ", "MonoObject *");
invoke.AppendLine ("mono_runtime_invoke (managed_method, {0}, arg_ptrs, NULL);", isStatic ? "NULL" : "mthis");
if (isCtor)
invoke.AppendLine ("xamarin_create_managed_ref (self, mthis, true);");
// prepare the return value
if (!isVoid) {
setup_return.AppendLine ("{0} res;", rettype);
var isArray = returntype is ArrayType;
var type = returntype.Resolve () ?? returntype;
var retain = method.RetainReturnValue;
if (returntype.IsValueType) {
setup_return.AppendLine ("res = *({0} *) mono_object_unbox ((MonoObject *) retval);", rettype);
} else if (isArray) {
var elementType = ((ArrayType) returntype).ElementType;
setup_return.AppendLine ("if (retval) {");
setup_return.AppendLine ("int length = mono_array_length ((MonoArray *) retval);");
setup_return.AppendLine ("int i;");
setup_return.AppendLine ("id *buf = (id *) malloc (sizeof (void *) * length);");
setup_return.AppendLine ("for (i = 0; i < length; i++) {");
setup_return.AppendLine ("MonoObject *value = mono_array_get ((MonoArray *) retval, MonoObject *, i);");
if (elementType.FullName == "System.String") {
setup_return.AppendLine ("char *str = mono_string_to_utf8 ((MonoString *) value);");
setup_return.AppendLine ("NSString *sv = [[NSString alloc] initWithUTF8String:str];");
setup_return.AppendLine ("[sv autorelease];");
setup_return.AppendLine ("mono_free (str);");
setup_return.AppendLine ("buf [i] = sv;");
} else if (IsNSObject (elementType)) {
setup_return.AppendLine ("buf [i] = xamarin_get_nsobject_handle ((MonoObject *) value);");
} else if (IsINativeObject (elementType)) {
setup_return.AppendLine ("buf [i] = xamarin_get_handle_for_inativeobject ((MonoObject *) value);");
} else {
throw ErrorHelper.CreateError (4111, method.Method, "The registrar cannot build a signature for type `{0}' in method `{1}`.", returntype.FullName, descriptiveMethodName);
}
setup_return.AppendLine ("}");
setup_return.AppendLine ("NSArray *arr = [[NSArray alloc] initWithObjects: buf count: length];");
setup_return.AppendLine ("free (buf);");
if (!retain)
setup_return.AppendLine ("[arr autorelease];");
setup_return.AppendLine ("res = arr;");
setup_return.AppendLine ("} else {");
setup_return.AppendLine ("res = NULL;");
setup_return.AppendLine ("}");
setup_return.AppendLine ("xamarin_framework_peer_lock ();");
setup_return.AppendLine ("mt_dummy_use (retval);");
setup_return.AppendLine ("xamarin_framework_peer_unlock ();");
} else {
setup_return.AppendLine ("if (!retval) {");
setup_return.AppendLine ("res = NULL;");
setup_return.AppendLine ("} else {");
if (IsNSObject (type)) {
setup_return.AppendLine ("id retobj;");
setup_return.AppendLine ("retobj = xamarin_get_nsobject_handle (retval);");
setup_return.AppendLine ("xamarin_framework_peer_lock ();");
setup_return.AppendLine ("[retobj retain];");
setup_return.AppendLine ("xamarin_framework_peer_unlock ();");
if (!retain)
setup_return.AppendLine ("[retobj autorelease];");
setup_return.AppendLine ("mt_dummy_use (retval);");
setup_return.AppendLine ("res = retobj;");
} else if (type.IsPlatformType ("ObjCRuntime", "Selector")) {
setup_return.AppendLine ("res = xamarin_get_selector_handle (retval);");
} else if (type.IsPlatformType ("ObjCRuntime", "Class")) {
setup_return.AppendLine ("res = xamarin_get_class_handle (retval);");
} else if (SharedStatic.IsNativeObject (type)) {
setup_return.AppendLine ("{0} retobj;", rettype);
setup_return.AppendLine ("retobj = xamarin_get_handle_for_inativeobject ((MonoObject *) retval);");
setup_return.AppendLine ("xamarin_framework_peer_lock ();");
setup_return.AppendLine ("[retobj retain];");
setup_return.AppendLine ("xamarin_framework_peer_unlock ();");
if (!retain)
setup_return.AppendLine ("[retobj autorelease];");
setup_return.AppendLine ("mt_dummy_use (retval);");
setup_return.AppendLine ("res = retobj;");
} else if (type.FullName == "System.String") {
// This should always be an NSString and never char*
setup_return.AppendLine ("char *str = mono_string_to_utf8 ((MonoString *) retval);");
setup_return.AppendLine ("NSString *nsstr = [[NSString alloc] initWithUTF8String:str];");
if (!retain)
setup_return.AppendLine ("[nsstr autorelease];");
setup_return.AppendLine ("mono_free (str);");
setup_return.AppendLine ("res = nsstr;");
} else if (SharedStatic.IsDelegate (type.Resolve ())) {
setup_return.AppendLine ("res = xamarin_get_block_for_delegate (managed_method, retval);");
} else {
throw ErrorHelper.CreateError (4104,
"The registrar cannot marshal the return value for type `{0}` in signature for method `{1}`.",
returntype.FullName, descriptiveMethodName);
}
setup_return.AppendLine ("}");
}
}
// Write out everything
if (merge_bodies) {
body.WriteLine ("MonoMethod *managed_method = *managed_method_ptr;");
} else {
if (!isGeneric)
body.Write ("static ");
body.WriteLine ("MonoMethod *managed_method = NULL;");
}
if (comment.Length > 0)
body.WriteLine (comment.ToString ());
if (isInstanceCategory)
body.WriteLine ("id p0 = self;");
body.WriteLine ("void *arg_ptrs [{0}];", num_arg);
if (!isStatic || isInstanceCategory)
body.WriteLine ("MonoObject *mthis;");
body.WriteLine ("if (mono_domain_get () == NULL)");
body.Indent ();
body.WriteLine ("mono_jit_thread_attach (NULL);");
body.Unindent ();
if (isCtor) {
body.WriteLine ("if (xamarin_try_get_nsobject (self)) {");
body.WriteLine ("*call_super = true;");
body.WriteLine ("return self;");
body.WriteLine ("}");
}
if ((!isStatic || isInstanceCategory) && !isCtor) {
body.WriteLine ("mthis = NULL;");
body.WriteLine ("if (self) {");
body.WriteLine ("mthis = xamarin_get_managed_object_for_ptr_fast (self);");
body.WriteLine ("}");
}
// no locking should be required here, it doesn't matter if we overwrite the field (it'll be the same value).
body.WriteLine ("if (!managed_method) {");
if (num_arg > 0) {
body.Write ("const char *paramptr[{0}] = {{ ", num_arg);
for (int i = 0; i < num_arg; i++) {
string paramtype;
if (isGeneric) {
paramtype = GetAssemblyQualifiedName (method.Method.Parameters [i].ParameterType);
} else {
paramtype = GetAssemblyQualifiedName (method.Parameters [i]);
}
if (merge_bodies) {
body.Write ("r{0}", arguments.Count);
arguments.Add (paramtype);
} else {
body.Write ("\"{0}\"", paramtype);
}
if (i < num_arg - 1)
body.Write (", ");
}
body.WriteLine (" };");
}
body.Write ("managed_method = ");
if (isGeneric)
body.Write ("xamarin_get_reflection_method_method (xamarin_get_generic_method_direct (mthis, ");
else
body.Write ("xamarin_get_reflection_method_method (xamarin_get_method_direct(");
if (merge_bodies) {
body.WriteLine ("r{2}, r{3}, {0}, {1}));",
num_arg, num_arg > 0 ? "paramptr" : "NULL",
arguments.Count, arguments.Count + 1);
arguments.Add (GetAssemblyQualifiedName (method.Method.DeclaringType));
arguments.Add (method.Method.Name);
} else {
body.WriteLine ("\"{0}\", \"{1}\", {2}, {3}));",
GetAssemblyQualifiedName (method.Method.DeclaringType),
method.Method.Name, num_arg, num_arg > 0 ? "paramptr" : "NULL");
}
if (merge_bodies)
body.WriteLine ("*managed_method_ptr = managed_method;");
body.WriteLine ("}");
if (!isStatic && !isInstanceCategory && !isCtor)
body.WriteLine ("xamarin_check_for_gced_object (mthis, _cmd, self, managed_method);");
if (trace)
body.AppendLine (nslog_start);
body.AppendLine (setup_call_stack);
body.AppendLine (invoke);
body.AppendLine (copyback);
body.AppendLine (setup_return);
if (trace )
body.AppendLine (nslog_end);
if (isCtor) {
body.WriteLine ("return self;");
} else if (isVoid) {
body.WriteLine ("return;");
} else {
body.WriteLine ("return res;");
}
body.WriteLine ("}");
/* We merge duplicated bodies (based on the signature of the method and the entire body) */
var objc_signature = new StringBuilder ().Append (rettype).Append (":");
for (int i = 0; i < method.Method.Parameters.Count; i++)
objc_signature.Append (ToObjCParameterType (method.Method.Parameters [i].ParameterType, descriptiveMethodName, exceptions, method.Method)).Append (":");
Body existing;
Body b = new Body () {
Code = body.ToString (),
Signature = objc_signature.ToString (),
};
if (merge_bodies && bodies.TryGetValue (b, out existing)) {
/* We already have an identical trampoline, use it instead */
b = existing;
} else {
/* Need to create a new trampoline */
if (merge_bodies)
bodies [b] = b;
b.Name = "native_to_managed_trampoline_" + bodies.Count.ToString ();
if (merge_bodies) {
methods.Append ("static ");
methods.Append (rettype).Append (" ").Append (b.Name).Append (" (id self, SEL _cmd, MonoMethod **managed_method_ptr");
for (int i = (isInstanceCategory ? 1 : 0); i < method.Method.Parameters.Count; i++) {
methods.Append (", ").Append (ToObjCParameterType (method.Method.Parameters [i].ParameterType, descriptiveMethodName, exceptions, method.Method));
methods.Append (" ").Append ("p").Append (i.ToString ());
}
for (int i = 0; i < arguments.Count; i++)
methods.Append (", const char *").Append ("r").Append (i.ToString ());
if (isCtor)
methods.Append (", bool* call_super");
methods.AppendLine (")");
methods.AppendLine (body);
methods.AppendLine ();
}
}
b.Count++;
sb.WriteLine ();
sb.WriteLine (GetObjCSignature (method, exceptions));
if (merge_bodies) {
sb.WriteLine ("{");
if (!isGeneric)
sb.Write ("static ");
sb.WriteLine ("MonoMethod *managed_method = NULL;");
if (isCtor) {
sb.WriteLine ("bool call_super = false;");
sb.Write ("id rv = ");
} else if (!isVoid) {
sb.Write ("return ");
}
sb.Write (b.Name);
sb.Write (" (self, _cmd, &managed_method");
var paramCount = method.Method.Parameters.Count;
if (isInstanceCategory)
paramCount--;
for (int i = 0; i < paramCount; i++)
sb.Write (", p{0}", i);
for (int i = 0; i < arguments.Count; i++)
sb.Write (", \"").Write (arguments [i]).Write ("\"");
if (isCtor)
sb.Write (", &call_super");
sb.WriteLine (");");
if (isCtor) {
sb.WriteLine ("if (call_super)");
sb.Indent ();
sb.Write ("rv = [super");
var split = method.Selector.Split (':');
if (split.Length == 1) {
sb.Append (" ");
sb.Append (split [0]);
} else {
for (int i = 0; i < split.Length - 1; i++) {
sb.Append (" ");
sb.Append (split [i]);
sb.Append (":");
sb.AppendFormat ("p{0}", i);
}
}
sb.WriteLine ("];");
sb.Unindent ();
sb.WriteLine ("return rv;");
}
sb.WriteLine ("}");
} else {
sb.WriteLine (body);
}
}