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 "base/enums.h" 23 #include "globals.h" 24 25 namespace art { 26 27 // Allow the meaning of offsets to be strongly typed. 28 class Offset { 29 public: 30 explicit Offset(size_t val) : val_(val) {} 31 int32_t Int32Value() const { 32 return static_cast<int32_t>(val_); 33 } 34 uint32_t Uint32Value() const { 35 return static_cast<uint32_t>(val_); 36 } 37 size_t SizeValue() const { 38 return val_; 39 } 40 41 protected: 42 size_t val_; 43 }; 44 std::ostream& operator<<(std::ostream& os, const Offset& offs); 45 46 // Offsets relative to the current frame. 47 class FrameOffset : public Offset { 48 public: 49 explicit FrameOffset(size_t val) : Offset(val) {} 50 bool operator>(FrameOffset other) const { return val_ > other.val_; } 51 bool operator<(FrameOffset other) const { return val_ < other.val_; } 52 }; 53 54 // Offsets relative to the current running thread. 55 template<PointerSize pointer_size> 56 class ThreadOffset : public Offset { 57 public: 58 explicit ThreadOffset(size_t val) : Offset(val) {} 59 }; 60 61 using ThreadOffset32 = ThreadOffset<PointerSize::k32>; 62 using ThreadOffset64 = ThreadOffset<PointerSize::k64>; 63 64 // Offsets relative to an object. 65 class MemberOffset : public Offset { 66 public: 67 explicit MemberOffset(size_t val) : Offset(val) {} 68 }; 69 70 } // namespace art 71 72 #endif // ART_RUNTIME_OFFSETS_H_ 73
