Add a mid-sized integration test for the Dart Embedding Api which

runtime/include/dart_api.h

 // Copyright (c) 2011, 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.
 
 #ifndef INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
  *
  * Dart is a class-based programming language for creating structured
@@ skipping 372 matching lines @@
  */
 typedef bool (*Dart_PostMessageCallback)(Dart_Isolate dest_isolate,
                                          Dart_Port dest_port,
                                          Dart_Port reply_port,
                                          Dart_Message message);
 // TODO(turnidge): Add a Dart_ReleaseMessage to hide allocation details.
 
 const Dart_Port kCloseAllPorts = 0;
 
 /**
+ * A create port callback.
+ *
+ * This callback allows the embedder to receive notification when a
+ * port is created.
+ */
+typedef void (*Dart_CreatePortCallback)(Dart_Isolate isolate,
+                                        Dart_Port port);
+
+/**
  * A close port callback.
  *
  * This callback allows the embedder to receive notification when a
  * port is closed. The constant 'kCloseAllPorts' is passed as the
  * 'port' parameter when all active ports are being closed at once.
  */
 typedef void (*Dart_ClosePortCallback)(Dart_Isolate isolate,
                                        Dart_Port port);
 
 /**
  * Allows embedders to provide an alternative mechanism for sending
  * inter-isolate messages. This setting only applies to the current
  * isolate.
  *
  * Most embedders will only call this function once, before isolate
  * execution begins. If this function is called after isolate
  * execution begins, the embedder is responsible for threading issues.
  */
 DART_EXPORT void Dart_SetMessageCallbacks(
+    Dart_CreatePortCallback create_port_callback,
     Dart_PostMessageCallback post_message_callback,
     Dart_ClosePortCallback close_port_callback);
 // TODO(turnidge): Consider moving this to isolate creation so that it
 // is impossible to mess up.
 
 /**
  * Handles a message on the current isolate.
  *
  * May generate an unhandled exception error.
  *
@@ skipping 16 matching lines @@
  *
  * This function waits for incoming messages for the current
  * isolate. As new messages arrive, they are handled using
  * Dart_HandleMessage. The routine exits when all ports to the
  * current isolate are closed.
  */
 DART_EXPORT Dart_Handle Dart_RunLoop();
 // TODO(turnidge): Should this be removed from the public api?
 
 /**
+ * Creates a Dart_Port and associates it with the current isolate.
+ */
+DART_EXPORT Dart_Port Dart_CreatePort();
+
+/**
+ * Does the current isolate have active ports?
+ */
+DART_EXPORT bool Dart_IsolateHasActivePorts();
+
+/**
  * Posts a message for some isolate. The message is built from a raw
  * array.
  *
  * \param port The destination port.
  * \param length The length of the data array.
  * \param data A data array to be sent in the message.
  *
  * \return True if the message was posted.
  */
 DART_EXPORT bool Dart_PostIntArray(Dart_Port port,
@@ skipping 722 matching lines @@
 
 // --- Profiling support ----
 
 // External pprof support for gathering and dumping symbolic
 // information that can be used for better profile reports for
 // dynamically generated code.
 DART_EXPORT void Dart_InitPprofSupport();
 DART_EXPORT void Dart_GetPprofSymbolInfo(void** buffer, int* buffer_size);
 
 #endif  // INCLUDE_DART_API_H_