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 "art_method-inl.h" 21 #include "scoped_thread_state_change.h" 22 23 namespace art { 24 25 // Variant of ScopedObjectAccess that does no runnable transitions. Should only be used by "fast" 26 // JNI methods. 27 class ScopedFastNativeObjectAccess : public ScopedObjectAccessAlreadyRunnable { 28 public: ScopedFastNativeObjectAccess(JNIEnv * env)29 explicit ScopedFastNativeObjectAccess(JNIEnv* env) 30 LOCKS_EXCLUDED(Locks::thread_suspend_count_lock_) 31 SHARED_LOCK_FUNCTION(Locks::mutator_lock_) ALWAYS_INLINE 32 : ScopedObjectAccessAlreadyRunnable(env) { 33 Locks::mutator_lock_->AssertSharedHeld(Self()); 34 DCHECK((*Self()->GetManagedStack()->GetTopQuickFrame())->IsFastNative()); 35 // Don't work with raw objects in non-runnable states. 36 DCHECK_EQ(Self()->GetState(), kRunnable); 37 } 38 UNLOCK_FUNCTION(Locks::mutator_lock_)39 ~ScopedFastNativeObjectAccess() UNLOCK_FUNCTION(Locks::mutator_lock_) ALWAYS_INLINE { 40 } 41 42 private: 43 DISALLOW_COPY_AND_ASSIGN(ScopedFastNativeObjectAccess); 44 }; 45 46 } // namespace art 47 48 #endif // ART_RUNTIME_NATIVE_SCOPED_FAST_NATIVE_OBJECT_ACCESS_H_ 49