Allow embedders to provide custom message delivery for an isolate.

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 28 matching lines @@
 
   static void InitOnce();
   static Isolate* Init();
   void Shutdown();
 
   // Visit all object pointers.
   void VisitObjectPointers(ObjectPointerVisitor* visitor, bool validate_frames);
 
   StoreBufferBlock* store_buffer() { return &store_buffer_; }
 
-  Monitor* monitor() const { return monitor_; }
-  void set_monitor(Monitor* value) { monitor_ = value; }
+  Dart_PostMessageCallback post_message_callback() const {

[Anton Muhin, 2011/10/18 17:19:58]

will you add a TODO to handle concurrent update of isolate's callbacks and
message sending?

[turnidge, 2011/10/18 17:33:40]

I added a comment in dart_api.h declaiming responsibility...

// 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.

Is that not enough?

+    return post_message_callback_;
+  }
+  void set_post_message_callback(Dart_PostMessageCallback value) {
+    post_message_callback_ = value;
+  }
+
+  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() {
     ASSERT(this == Isolate::Current());
     active_ports_++;
@@ skipping 141 matching lines @@
   void SetStackLimitFromCurrentTOS(uword isolate_stack_top);
 
   void ResetStackLimitAfterException() {
     stack_limit_ = stack_limit_on_overflow_exception_ + kStackSizeBuffer;
   }
 
   void AdjustStackLimitForException() {
     stack_limit_ = stack_limit_on_overflow_exception_;
   }
 
+  void StandardRunLoop();
+
   intptr_t ast_node_id() const { return ast_node_id_; }
   void set_ast_node_id(int value) { ast_node_id_ = value; }
 
  private:
   Isolate();
 
   void PrintInvokedFunctions();
 
   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_;
   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_;
@@ skipping 23 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_