Prepare for zero-copy sending

mROA.Codegen/MethodRepo.cstmpl

@@ -23,6 +23,7 @@ namespace mROA.Codegen
                 ReturnType = typeof(<!L returnType>),
                 ParameterTypes = new Type[]  { <!L parametersType> },
                 SuitableType = typeof(<!L suitableType>),
+                RequireCancellation = <!L cancellation>,
                 Invoking = (i, parameters, special, post) => <!L funcInvoking>,
             }<!T>
             <!T syncInvoker>

mROA.Codegen/Templates/InvokerTemplate.cs

@@ -9,6 +9,7 @@ namespace mROA.Codegen.Templates
         private const string ParametersTypeTag = "parametersType";
         private const string SuitableTypeTag = "suitableType";
         private const string FuncInvokingTag = "funcInvoking";
+        private const string CancellationTag = "cancellation";
         private const string IsTrustedTag = "isTrusted";
 
         public InvokerTemplate(TemplateDocument template) : base(template) { }
@@ -42,5 +43,10 @@ namespace mROA.Codegen.Templates
         {
             Define(IsTrustedTag, value);
         }
+
+        public void DefineCancellation(string value)
+        {
+            Define(CancellationTag, value);
+        }
     }
 }

mROA.Codegen/mROASourceGenerator.cs

@@ -316,11 +316,14 @@ namespace mROA.Codegen
 
             var parametersInsertList = new List<string>();
 
+            var useCancellationToken = false;
+            
             foreach (var parameter in method.Parameters)
                 switch (parameter.Type.Name)
                 {
                     case "CancellationToken":
                         parametersInsertList.Add("(CancellationToken)special[1]");
+                        useCancellationToken = true;
                         break;
                     case "RequestContext":
                         parametersInsertList.Add("(RequestContext)special[0]");
@@ -359,6 +362,7 @@ namespace mROA.Codegen
                 invokerTemplate.DefineSuitableType(baseInterface.ToUnityString());
                 invokerTemplate.DefineFuncInvoking(funcInvoking);
                 invokerTemplate.DefineIsTrusted((!isUntrusted).ToString().ToLower());
+                invokerTemplate.DefineCancellation(useCancellationToken.ToString().ToLower());
                 backend = invokerTemplate.Compile();
             }
             else
@@ -370,6 +374,7 @@ namespace mROA.Codegen
                 invokerTemplate.DefineSuitableType(baseInterface.ToUnityString());
                 invokerTemplate.DefineFuncInvoking(funcInvoking);
                 invokerTemplate.DefineIsTrusted((!isUntrusted).ToString().ToLower());
+                
                 backend = invokerTemplate.Compile();
             }