Add support for native ports in the vm.

runtime/vm/isolate.h

 // Copyright (c) 2012, 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 "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/store_buffer.h"
 #include "vm/timer.h"
 
 namespace dart {
 
 // Forward declarations.
 class ApiState;
 class BigintStore;
 class CodeIndexTable;
 class Debugger;
 class HandleScope;
 class HandleVisitor;
 class Heap;
 class LongJump;
-class Message;
-class MessageQueue;
+class MessageHandler;
 class Mutex;
 class ObjectPointerVisitor;
 class ObjectStore;
 class RawContext;
 class RawObject;
 class StackResource;
 class StubCode;
 class Zone;
 
 class Isolate {
@@ skipping 14 matching lines @@
 
   StoreBufferBlock* store_buffer() { return &store_buffer_; }
 
   Dart_MessageNotifyCallback message_notify_callback() const {
     return message_notify_callback_;
   }
   void set_message_notify_callback(Dart_MessageNotifyCallback value) {
     message_notify_callback_ = value;
   }
 
-  MessageQueue* message_queue() const { return message_queue_; }
-  void set_message_queue(MessageQueue* value) { message_queue_ = value; }
-
   const char* name() const { return name_; }
 
-  // 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());
-    num_ports_++;
-  }
-  void decrement_num_ports() {
-    ASSERT(this == Isolate::Current());
-    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_); }
 
@@ skipping 136 matching lines @@
   enum {
     kApiInterrupt = 0x1,      // An interrupt from Dart_InterruptIsolate.
     kMessageInterrupt = 0x2,  // An interrupt to process an out of band message.
 
     kInterruptsMask = kApiInterrupt | kMessageInterrupt,
   };
 
   void ScheduleInterrupts(uword interrupt_bits);
   uword GetAndClearInterrupts();
 
-  void PostMessage(Message* message);
-  void ClosePort(Dart_Port port);
-  void CloseAllPorts();
+  MessageHandler* message_handler() const { return message_handler_; }
+  void set_message_handler(MessageHandler* value) { message_handler_ = value; }
 
   // Returns null on success, unhandled exception on failure.
   RawObject* StandardRunLoop();
 
   intptr_t ast_node_id() const { return ast_node_id_; }
   void set_ast_node_id(int value) { ast_node_id_ = value; }
 
   Debugger* debugger() const { return debugger_; }
 
   static void SetCreateCallback(Dart_IsolateCreateCallback cback);
   static Dart_IsolateCreateCallback CreateCallback();
 
   static void SetInterruptCallback(Dart_IsolateInterruptCallback cback);
   static Dart_IsolateInterruptCallback InterruptCallback();
 
  private:
   Isolate();
 
   void BuildName(const char* name_prefix);
   void PrintInvokedFunctions();
 
   static uword GetSpecifiedStackSize();
 
   static const uword kStackSizeBuffer = (128 * KB);
   static const uword kDefaultStackSize = (1 * MB);
 
   StoreBufferBlock store_buffer_;
-  MessageQueue* message_queue_;
   Dart_MessageNotifyCallback message_notify_callback_;
   char* name_;
-  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
   int32_t random_seed_;
   BigintStore* bigint_store_;
   uword top_exit_frame_info_;
   void* init_callback_data_;
   Dart_LibraryTagHandler library_tag_handler_;
   ApiState* api_state_;
   StubCode* stub_code_;
   CodeIndexTable* code_index_table_;
   Debugger* debugger_;
   LongJump* long_jump_base_;
   TimerList timer_list_;
   intptr_t ast_node_id_;
   Mutex* mutex_;  // protects stack_limit_ and saved_stack_limit_.
   uword stack_limit_;
   uword saved_stack_limit_;
+  MessageHandler* message_handler_;
 
   static Dart_IsolateCreateCallback create_callback_;
   static Dart_IsolateInterruptCallback interrupt_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Isolate);
 };
 
 }  // namespace dart
 
 #if defined(TARGET_OS_LINUX)
 #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_