Refactor Thread lifecycle interface, add Thread::Enter/ExitIsolate.

runtime/vm/dart_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_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/class_finalizer.h"
@@ skipping 1338 matching lines @@
   DARTSCOPE(isolate);
   return Api::NewHandle(isolate, String::New(isolate->name()));
 }
 
 
 
 DART_EXPORT void Dart_EnterIsolate(Dart_Isolate isolate) {
   CHECK_NO_ISOLATE(Isolate::Current());
   // TODO(16615): Validate isolate parameter.
   Isolate* iso = reinterpret_cast<Isolate*>(isolate);
-  Isolate::SetCurrent(iso);
+  if (iso->mutator_thread() != NULL) {
+    FATAL("Multiple mutators within one isolate is not supported.");
+  }
+  Thread::EnterIsolate(iso);
 }
 
 
 DART_EXPORT void Dart_IsolateBlocked() {
   Isolate* isolate = Isolate::Current();
   CHECK_ISOLATE(isolate);
   IsolateProfilerData* profiler_data = isolate->profiler_data();
   if (profiler_data == NULL) {
     return;
   }
   profiler_data->Block();
 }
 
 
 DART_EXPORT void Dart_IsolateUnblocked() {
   Isolate* isolate = Isolate::Current();
   CHECK_ISOLATE(isolate);
   IsolateProfilerData* profiler_data = isolate->profiler_data();
   if (profiler_data == NULL) {
     return;
   }
   profiler_data->Unblock();
 }
 
 
 DART_EXPORT void Dart_ExitIsolate() {
   CHECK_ISOLATE(Isolate::Current());
-  Isolate::SetCurrent(NULL);
+  Thread::ExitIsolate();
 }
 
 
 DART_EXPORT Dart_Handle Dart_IsolateSetStrictCompilation(bool value) {
   CHECK_ISOLATE(Isolate::Current());
   Isolate* isolate = Isolate::Current();
   if (isolate->has_compiled()) {
     return Api::NewError(
         "%s expects that the isolate has not yet compiled code.", CURRENT_FUNC);
   }
@@ skipping 4122 matching lines @@
 
 
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
     const char* name,
     Dart_ServiceRequestCallback callback,
     void* user_data) {
   Service::RegisterRootEmbedderCallback(name, callback, user_data);
 }
 
 }  // namespace dart