1 /* 2 * Copyright (C) 2011 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_SIRT_REF_H_ 18 #define ART_RUNTIME_SIRT_REF_H_ 19 20 #include "base/logging.h" 21 #include "base/macros.h" 22 #include "thread.h" 23 24 namespace art { 25 26 template<class T> 27 class SirtRef { 28 public: SirtRef(Thread * self,T * object)29 SirtRef(Thread* self, T* object) : self_(self), sirt_(object) { 30 self_->PushSirt(&sirt_); 31 } ~SirtRef()32 ~SirtRef() { 33 CHECK(self_->PopSirt() == &sirt_); 34 } 35 36 T& operator*() const { return *get(); } 37 T* operator->() const { return get(); } get()38 T* get() const { 39 return down_cast<T*>(sirt_.GetReference(0)); 40 } 41 42 void reset(T* object = NULL) { 43 sirt_.SetReference(0, object); 44 } 45 46 private: 47 Thread* const self_; 48 StackIndirectReferenceTable sirt_; 49 50 DISALLOW_COPY_AND_ASSIGN(SirtRef); 51 }; 52 53 } // namespace art 54 55 #endif // ART_RUNTIME_SIRT_REF_H_ 56