dart:io | Add asynchronous Link.create implementation.

runtime/bin/file.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/file.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/io_buffer.h"
 #include "bin/thread.h"
@@ skipping 995 matching lines @@
         return CObject::NewOSError();
       }
     } else {
       return CObject::FileClosedError();
     }
   }
   return CObject::IllegalArgumentError();
 }
 
 
+static CObject* FileCreateLinkRequest(const CObjectArray& request) {
+  if (request.Length() != 3 ||
+      !request[1]->IsString() ||
+      !request[2]->IsString()) {
+    return CObject::IllegalArgumentError();
+  }
+  CObjectString link_name(request[1]);
+  CObjectString target_name(request[2]);
+  if (File::CreateLink(link_name.CString(), target_name.CString())) {
+    return CObject::True();
+  } else {
+    return CObject::NewOSError();
+  }
+}
+
+
 static CObject* FileDeleteLinkRequest(const CObjectArray& request) {
   if (request.Length() == 2 && request[1]->IsString()) {
     CObjectString filename(request[1]);
     bool result = File::DeleteLink(filename.CString());
     if (result) {
       return CObject::True();
     } else {
       return CObject::NewOSError();
     }
   }
-  return CObject::False();
+  return CObject::IllegalArgumentError();
 }
 
 
 static void FileService(Dart_Port dest_port_id,
                  Dart_Port reply_port_id,
                  Dart_CObject* message) {
   CObject* response = CObject::IllegalArgumentError();
   CObjectArray request(message);
   if (message->type == Dart_CObject::kArray) {
     if (request.Length() > 1 && request[0]->IsInt32()) {
@@ skipping 52 matching lines @@
           break;
         case File::kReadListRequest:
           response = FileReadListRequest(request);
           break;
         case File::kWriteListRequest:
           response = FileWriteListRequest(request);
           break;
         case File::kDeleteLinkRequest:
           response = FileDeleteLinkRequest(request);
           break;
+        case File::kCreateLinkRequest:
+          response = FileCreateLinkRequest(request);
+          break;
         default:
           UNREACHABLE();
       }
     }
   }
 
   Dart_PostCObject(reply_port_id, response->AsApiCObject());
 }
 
 
 Dart_Port File::GetServicePort() {
   return file_service_.GetServicePort();
 }
 
 
 void FUNCTION_NAME(File_NewServicePort)(Dart_NativeArguments args) {
   Dart_EnterScope();
   Dart_SetReturnValue(args, Dart_Null());
   Dart_Port service_port = File::GetServicePort();
   if (service_port != ILLEGAL_PORT) {
     // Return a send port for the service port.
     Dart_Handle send_port = Dart_NewSendPort(service_port);
     Dart_SetReturnValue(args, send_port);
   }
   Dart_ExitScope();
 }