upload android base code part3

android/art/runtime/scoped_thread_state_change.cc

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "scoped_thread_state_change.h"
+
+#include <type_traits>
+
+#include "base/casts.h"
+#include "base/logging.h"
+#include "java_vm_ext.h"
+#include "obj_ptr-inl.h"
+#include "runtime-inl.h"
+
+namespace art {
+
+// See ScopedObjectAccessAlreadyRunnable::ScopedObjectAccessAlreadyRunnable(JavaVM*).
+static_assert(std::is_base_of<JavaVM, JavaVMExt>::value, "JavaVMExt does not extend JavaVM");
+
+void ScopedObjectAccessAlreadyRunnable::DCheckObjIsNotClearedJniWeakGlobal(
+    ObjPtr<mirror::Object> obj) {
+  DCHECK_NE(obj, Runtime::Current()->GetClearedJniWeakGlobal());
+}
+
+bool ScopedObjectAccessAlreadyRunnable::ForceCopy() const {
+  return vm_->ForceCopy();
+}
+
+}  // namespace art