Provide an API to dart:developer to control the web server hosting the Service Protocol

runtime/lib/developer.cc

 // Copyright (c) 2015, 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 "vm/bootstrap_natives.h"
 
 #include "include/dart_api.h"
 
 #include "vm/debugger.h"
 #include "vm/exceptions.h"
 #include "vm/flags.h"
+#include "vm/message.h"
 #include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/service.h"
 #include "vm/service_isolate.h"
 
 namespace dart {
 
 // Native implementations for the dart:developer library.
 DEFINE_NATIVE_ENTRY(Developer_debugger, 2) {
@@ skipping 91 matching lines @@
   // service isolate.  This can happen, for example, because the
   // service isolate uses dart:io.  If we decide that we want to start
   // supporting this in the future, it will take some work.
   if (!ServiceIsolate::IsServiceIsolateDescendant(isolate)) {
     isolate->RegisterServiceExtensionHandler(name, handler);
   }
   return Object::null();
 #endif  // PRODUCT
 }
 
+DEFINE_NATIVE_ENTRY(Developer_getServiceMajorVersion, 0) {
+#if defined(PRODUCT)
+  return Smi::New(0);

[siva, 2016/10/21 16:15:06]

Shouldn't the product version of these pretty much be UNREACHABLE
as the native resolved (lookupExtension) will not be returning
these entry points in PRODUCT mode.

+#else
+  return Smi::New(SERVICE_PROTOCOL_MAJOR_VERSION);
+#endif
+}
+
+
+DEFINE_NATIVE_ENTRY(Developer_getServiceMinorVersion, 0) {
+#if defined(PRODUCT)
+  return Smi::New(0);
+#else
+  return Smi::New(SERVICE_PROTOCOL_MINOR_VERSION);
+#endif
+}
+
+
+static void SendNull(const SendPort& port) {
+  const Dart_Port destination_port_id = port.Id();
+  PortMap::PostMessage(new Message(
+        destination_port_id, Object::null(), Message::kNormalPriority));
+}
+
+
+DEFINE_NATIVE_ENTRY(Developer_getServerInfo, 1) {
+  GET_NON_NULL_NATIVE_ARGUMENT(SendPort, port, arguments->NativeArgAt(0));
+#if defined(PRODUCT)
+  SendNull(port);
+  return Object::null();
+#else
+  if (!ServiceIsolate::IsRunning()) {
+    SendNull(port);
+  } else {
+    ServiceIsolate::RequestServerInfo(port);
+  }
+  return Object::null();
+#endif
+}
+
+
+DEFINE_NATIVE_ENTRY(Developer_webServerControl, 2) {
+  GET_NON_NULL_NATIVE_ARGUMENT(SendPort, port, arguments->NativeArgAt(0));
+#if defined(PRODUCT)
+  SendNull(port);
+  return Object::null();
+#else
+  GET_NON_NULL_NATIVE_ARGUMENT(Bool, enabled, arguments->NativeArgAt(1));
+  if (!ServiceIsolate::IsRunning()) {
+    SendNull(port);
+  } else {
+    ServiceIsolate::ControlWebServer(port, enabled.value());
+  }
+  return Object::null();
+#endif
+}
+
 }  // namespace dart