- Add an OSThread structure which is the generic TLS structure for all C++

runtime/vm/dart_api_impl.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_DART_API_IMPL_H_
 #define VM_DART_API_IMPL_H_
 
 #include "vm/allocation.h"
 #include "vm/native_arguments.h"
 #include "vm/object.h"
@@ skipping 268 matching lines @@
   // ApiNativeScope if any.
   static ThreadLocalKey api_native_key_;
   static Dart_Handle true_handle_;
   static Dart_Handle false_handle_;
   static Dart_Handle null_handle_;
   static Dart_Handle empty_string_handle_;
 
   friend class ApiNativeScope;
 };
 
-class IsolateSaver {
- public:
-  explicit IsolateSaver(Isolate* current_isolate)
-      : saved_isolate_(current_isolate) {
-  }
-  ~IsolateSaver() {
-    // TODO(koda): Audit users; they should know whether they're in an isolate.
-    if (saved_isolate_ != NULL) {
-      Thread::EnterIsolate(saved_isolate_);
-    }
-  }
- private:
-  Isolate* saved_isolate_;
-
-  DISALLOW_COPY_AND_ASSIGN(IsolateSaver);
-};
-
 // Start a scope in which no Dart API call backs are allowed.
 #define START_NO_CALLBACK_SCOPE(thread)                                        \
   thread->IncrementNoCallbackScopeDepth()
 
 // End a no Dart API call backs Scope.
 #define END_NO_CALLBACK_SCOPE(thread)                                          \
   thread->DecrementNoCallbackScopeDepth()
 
 #define CHECK_CALLBACK_STATE(thread)                                           \
   if (thread->no_callback_scope_depth() != 0) {                                \
     return reinterpret_cast<Dart_Handle>(                                      \
         Api::AcquiredError(thread->isolate()));                                \
   }                                                                            \
 
 #define CHECK_COMPILATION_ALLOWED(isolate)                                     \
   if (!isolate->compilation_allowed()) {                                       \
     return Api::NewError("%s: Cannot load after Dart_Precompile",              \
                          CURRENT_FUNC);                                        \
   }                                                                            \
 
 #define ASSERT_CALLBACK_STATE(thread)                                         \
   ASSERT(thread->no_callback_scope_depth() == 0)
 
 }  // namespace dart.
 
 #endif  // VM_DART_API_IMPL_H_