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_OFFSETS_H_ 18 #define ART_RUNTIME_OFFSETS_H_ 19 20 #include <ostream> 21 22 #include "globals.h" 23 24 namespace art { 25 26 // Allow the meaning of offsets to be strongly typed. 27 class Offset { 28 public: 29 explicit Offset(size_t val) : val_(val) {} 30 int32_t Int32Value() const { 31 return static_cast<int32_t>(val_); 32 } 33 uint32_t Uint32Value() const { 34 return static_cast<uint32_t>(val_); 35 } 36 size_t SizeValue() const { 37 return val_; 38 } 39 40 protected: 41 size_t val_; 42 }; 43 std::ostream& operator<<(std::ostream& os, const Offset& offs); 44 45 // Offsets relative to the current frame. 46 class FrameOffset : public Offset { 47 public: 48 explicit FrameOffset(size_t val) : Offset(val) {} 49 bool operator>(FrameOffset other) const { return val_ > other.val_; } 50 bool operator<(FrameOffset other) const { return val_ < other.val_; } 51 }; 52 53 // Offsets relative to the current running thread. 54 template<size_t pointer_size> 55 class ThreadOffset : public Offset { 56 public: 57 explicit ThreadOffset(size_t val) : Offset(val) {} 58 }; 59 60 // Offsets relative to an object. 61 class MemberOffset : public Offset { 62 public: 63 explicit MemberOffset(size_t val) : Offset(val) {} 64 }; 65 66 } // namespace art 67 68 #endif // ART_RUNTIME_OFFSETS_H_ 69
