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