1 /*
2  * Copyright (C) 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ART_RUNTIME_NATIVE_SCOPED_FAST_NATIVE_OBJECT_ACCESS_H_
18 #define ART_RUNTIME_NATIVE_SCOPED_FAST_NATIVE_OBJECT_ACCESS_H_
19 
20 #include <jni.h>
21 
22 #include "scoped_thread_state_change.h"
23 
24 namespace art {
25 
26 // Variant of ScopedObjectAccess that does no runnable transitions. Should only be used by "fast"
27 // JNI methods.
28 class ScopedFastNativeObjectAccess : public ScopedObjectAccessAlreadyRunnable {
29  public:
30   ALWAYS_INLINE explicit ScopedFastNativeObjectAccess(JNIEnv* env)
31     REQUIRES(!Locks::thread_suspend_count_lock_)
32     SHARED_LOCK_FUNCTION(Locks::mutator_lock_);
33 
~ScopedFastNativeObjectAccess()34   ALWAYS_INLINE ~ScopedFastNativeObjectAccess() UNLOCK_FUNCTION(Locks::mutator_lock_) {}
35 
36  private:
37   DISALLOW_COPY_AND_ASSIGN(ScopedFastNativeObjectAccess);
38 };
39 
40 }  // namespace art
41 
42 #endif  // ART_RUNTIME_NATIVE_SCOPED_FAST_NATIVE_OBJECT_ACCESS_H_
43