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