Wholesale move sky/engine/tonic to tonic

tonic/dart_state.h

Index: tonic/dart_state.h
diff --git a/tonic/dart_state.h b/tonic/dart_state.h
new file mode 100644
index 0000000000000000000000000000000000000000..5eafb550aa246eb4ecdf27d213d834f88a617f40
--- /dev/null
+++ b/tonic/dart_state.h
@@ -0,0 +1,78 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SKY_ENGINE_TONIC_DART_STATE_H_
+#define SKY_ENGINE_TONIC_DART_STATE_H_
+
+#include "base/logging.h"
+#include "base/memory/weak_ptr.h"
+#include "base/supports_user_data.h"
+#include "dart/runtime/include/dart_api.h"
+#include "tonic/dart_api_scope.h"
+#include "tonic/dart_isolate_scope.h"
+#include "tonic/dart_persistent_value.h"
+
+namespace blink {
+class DartClassLibrary;
+class DartExceptionFactory;
+class DartLibraryLoader;
+class DartStringCache;
+class DartTimerHeap;
+
+// DartState represents the state associated with a given Dart isolate. The
+// lifetime of this object is controlled by the DartVM. If you want to hold a
+// reference to a DartState instance, please hold a base::WeakPtr<DartState>.
+//
+// DartState is analogous to gin::PerIsolateData and JSC::ExecState.
+class DartState : public base::SupportsUserData {
+ public:
+  class Scope {
+   public:
+    Scope(DartState* dart_state);
+    ~Scope();
+
+   private:
+    DartIsolateScope scope_;
+    DartApiScope api_scope_;
+  };
+
+  DartState();
+  virtual ~DartState();
+
+  static DartState* From(Dart_Isolate isolate);
+  static DartState* Current();
+
+  base::WeakPtr<DartState> GetWeakPtr();
+
+  Dart_Isolate isolate() { return isolate_; }
+  void SetIsolate(Dart_Isolate isolate);
+
+  DartClassLibrary& class_library() { return *class_library_; }
+  DartExceptionFactory& exception_factory() { return *exception_factory_; }
+  DartLibraryLoader& library_loader() { return *library_loader_; }
+  DartStringCache& string_cache() { return *string_cache_; }
+  DartTimerHeap& timer_heap() { return *timer_heap_; }
+
+  Dart_Handle index_handle() { return index_handle_.value(); }
+
+  virtual void DidSetIsolate() {}
+
+ private:
+  Dart_Isolate isolate_;
+  std::unique_ptr<DartClassLibrary> class_library_;
+  std::unique_ptr<DartExceptionFactory> exception_factory_;
+  std::unique_ptr<DartLibraryLoader> library_loader_;
+  std::unique_ptr<DartStringCache> string_cache_;
+  std::unique_ptr<DartTimerHeap> timer_heap_;
+  DartPersistentValue index_handle_;
+
+ protected:
+  base::WeakPtrFactory<DartState> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(DartState);
+};
+
+}  // namespace blink
+
+#endif  // SKY_ENGINE_TONIC_DART_STATE_H_