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

runtime/vm/isolate.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 VM_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include <limits.h>
 
 #include "include/dart_api.h"
@@ skipping 45 matching lines @@
   Dart_ClosePortCallback close_port_callback() const {
     return close_port_callback_;
   }
   void set_close_port_callback(Dart_ClosePortCallback value) {
     close_port_callback_ = value;
   }
 
   MessageQueue* message_queue() const { return message_queue_; }
   void set_message_queue(MessageQueue* value) { message_queue_ = value; }
 
-  // The count of active ports is only correct when read from the current
-  // isolate. This value is not protected from being updated concurrently.
-  intptr_t active_ports() const { return active_ports_; }
-  void increment_active_ports() {
+  // The number of ports is only correct when read from the current
+  // isolate. This value is not protected from being updated
+  // concurrently.
+  intptr_t num_ports() const { return num_ports_; }
+  void increment_num_ports() {
     ASSERT(this == Isolate::Current());
-    active_ports_++;
+    num_ports_++;
   }
-  void decrement_active_ports() {
+  void decrement_num_ports() {
     ASSERT(this == Isolate::Current());
-    active_ports_--;
+    num_ports_--;
+  }
+
+  intptr_t live_ports() const { return live_ports_; }
+  void increment_live_ports() {
+    ASSERT(this == Isolate::Current());
+    live_ports_++;
+  }
+  void decrement_live_ports() {
+    ASSERT(this == Isolate::Current());
+    live_ports_--;
+  }
+
+  Dart_Port main_port() { return main_port_; }
+  void set_main_port(Dart_Port port) {
+    ASSERT(main_port_ == 0);  // Only set main port once.
+    main_port_ = port;
   }
 
   Heap* heap() const { return heap_; }
   void set_heap(Heap* value) { heap_ = value; }
   static intptr_t heap_offset() { return OFFSET_OF(Isolate, heap_); }
 
   ObjectStore* object_store() const { return object_store_; }
   void set_object_store(ObjectStore* value) { object_store_ = value; }
   static intptr_t object_store_offset() {
     return OFFSET_OF(Isolate, object_store_);
@@ skipping 147 matching lines @@
   static uword GetSpecifiedStackSize();
 
   static const uword kStackSizeBuffer = (128 * KB);
   static const uword kDefaultStackSize = (1 * MB);
 
   StoreBufferBlock store_buffer_;
   Monitor* monitor_;
   MessageQueue* message_queue_;
   Dart_PostMessageCallback post_message_callback_;
   Dart_ClosePortCallback close_port_callback_;
-  intptr_t active_ports_;
+  intptr_t num_ports_;
+  intptr_t live_ports_;
+  Dart_Port main_port_;
   Heap* heap_;
   ObjectStore* object_store_;
   StackResource* top_resource_;
   RawContext* top_context_;
   Zone* current_zone_;
 #if defined(DEBUG)
   int32_t no_gc_scope_depth_;
   int32_t no_handle_scope_depth_;
   HandleScope* top_handle_scope_;
 #endif
@@ skipping 22 matching lines @@
 #include "vm/isolate_linux.h"
 #elif defined(TARGET_OS_MACOS)
 #include "vm/isolate_macos.h"
 #elif defined(TARGET_OS_WINDOWS)
 #include "vm/isolate_win.h"
 #else
 #error Unknown target os.
 #endif
 
 #endif  // VM_ISOLATE_H_