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/*
* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// This implementation is borrowed from Chromium.
#ifndef RTC_BASE_CONTAINERS_MOVE_ONLY_INT_H_
#define RTC_BASE_CONTAINERS_MOVE_ONLY_INT_H_
namespace webrtc {
// A move-only class that holds an integer. This is designed for testing
// containers. See also CopyOnlyInt.
class MoveOnlyInt {
public:
explicit MoveOnlyInt(int data = 1) : data_(data) {}
MoveOnlyInt(const MoveOnlyInt& other) = delete;
MoveOnlyInt& operator=(const MoveOnlyInt& other) = delete;
MoveOnlyInt(MoveOnlyInt&& other) : data_(other.data_) { other.data_ = 0; }
~MoveOnlyInt() { data_ = 0; }
MoveOnlyInt& operator=(MoveOnlyInt&& other) {
data_ = other.data_;
other.data_ = 0;
return *this;
}
friend bool operator==(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
return lhs.data_ == rhs.data_;
}
friend bool operator!=(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
return !operator==(lhs, rhs);
}
friend bool operator<(const MoveOnlyInt& lhs, int rhs) {
return lhs.data_ < rhs;
}
friend bool operator<(int lhs, const MoveOnlyInt& rhs) {
return lhs < rhs.data_;
}
friend bool operator<(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
return lhs.data_ < rhs.data_;
}
friend bool operator>(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
return rhs < lhs;
}
friend bool operator<=(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
return !(rhs < lhs);
}
friend bool operator>=(const MoveOnlyInt& lhs, const MoveOnlyInt& rhs) {
return !(lhs < rhs);
}
int data() const { return data_; }
private:
volatile int data_;
};
} // namespace webrtc
#endif // RTC_BASE_CONTAINERS_MOVE_ONLY_INT_H_