Implement safepointing of threads

runtime/vm/native_api_impl.cc

 // Copyright (c) 2013, 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 "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_message.h"
 #include "vm/dart_api_state.h"
@@ skipping 10 matching lines @@
   return reinterpret_cast<uint8_t*>(new_ptr);
 }
 
 
 class IsolateSaver {
  public:
   explicit IsolateSaver(Isolate* current_isolate)
       : saved_isolate_(current_isolate) {
     if (current_isolate != NULL) {
       ASSERT(current_isolate == Isolate::Current());
-      Thread::ExitIsolate();
+      Dart_ExitIsolate();
     }
   }
   ~IsolateSaver() {
     if (saved_isolate_ != NULL) {
-      Thread::EnterIsolate(saved_isolate_);
+      Dart_Isolate I = reinterpret_cast<Dart_Isolate>(saved_isolate_);
+      Dart_EnterIsolate(I);
     }
   }
  private:
   Isolate* saved_isolate_;
 
   DISALLOW_COPY_AND_ASSIGN(IsolateSaver);
 };
 
 
 static bool PostCObjectHelper(Dart_Port port_id, Dart_CObject* message) {
@@ skipping 74 matching lines @@
   Dart_Handle result = Api::CheckAndFinalizePendingClasses(T);
   if (::Dart_IsError(result)) {
     return result;
   }
   CHECK_CALLBACK_STATE(T);
   CompileAll(T, &result);
   return result;
 }
 
 }  // namespace dart