/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_OFFSETS_H_
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#define ART_RUNTIME_OFFSETS_H_
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#include <iosfwd>
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#include "base/enums.h"
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#include "runtime_globals.h"
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namespace art {
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// Allow the meaning of offsets to be strongly typed.
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class Offset {
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public:
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constexpr explicit Offset(size_t val) : val_(val) {}
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constexpr int32_t Int32Value() const {
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return static_cast<int32_t>(val_);
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}
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constexpr uint32_t Uint32Value() const {
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return static_cast<uint32_t>(val_);
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}
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constexpr size_t SizeValue() const {
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return val_;
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}
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protected:
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size_t val_;
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};
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std::ostream& operator<<(std::ostream& os, const Offset& offs);
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// Offsets relative to the current frame.
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class FrameOffset : public Offset {
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public:
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constexpr explicit FrameOffset(size_t val) : Offset(val) {}
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bool operator>(FrameOffset other) const { return val_ > other.val_; }
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bool operator<(FrameOffset other) const { return val_ < other.val_; }
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};
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// Offsets relative to the current running thread.
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template<PointerSize pointer_size>
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class ThreadOffset : public Offset {
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public:
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constexpr explicit ThreadOffset(size_t val) : Offset(val) {}
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};
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using ThreadOffset32 = ThreadOffset<PointerSize::k32>;
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using ThreadOffset64 = ThreadOffset<PointerSize::k64>;
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// Offsets relative to an object.
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class MemberOffset : public Offset {
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public:
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constexpr explicit MemberOffset(size_t val) : Offset(val) {}
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};
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} // namespace art
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#endif // ART_RUNTIME_OFFSETS_H_
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