AtomicWrapper.h

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/*
 * This file belongs to the Galois project, a C++ library for exploiting
 * parallelism. The code is being released under the terms of the 3-Clause BSD
 * License (a copy is located in LICENSE.txt at the top-level directory).
 *
 * Copyright (C) 2018, The University of Texas at Austin. All rights reserved.
 * UNIVERSITY EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES CONCERNING THIS
 * SOFTWARE AND DOCUMENTATION, INCLUDING ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR ANY PARTICULAR PURPOSE, NON-INFRINGEMENT AND WARRANTIES OF
 * PERFORMANCE, AND ANY WARRANTY THAT MIGHT OTHERWISE ARISE FROM COURSE OF
 * DEALING OR USAGE OF TRADE.  NO WARRANTY IS EITHER EXPRESS OR IMPLIED WITH
 * RESPECT TO THE USE OF THE SOFTWARE OR DOCUMENTATION. Under no circumstances
 * shall University be liable for incidental, special, indirect, direct or
 * consequential damages or loss of profits, interruption of business, or
 * related expenses which may arise from use of Software or Documentation,
 * including but not limited to those resulting from defects in Software and/or
 * Documentation, or loss or inaccuracy of data of any kind.
 */

#ifndef _ATOMIC_WRAPPER_H_
#define _ATOMIC_WRAPPER_H_

#include <atomic>

#include "galois/config.h"

namespace galois {
template <class T>
class CopyableAtomic : public std::atomic<T> {
public:
  CopyableAtomic() : std::atomic<T>(T{}) {}

  constexpr CopyableAtomic(T desired) : std::atomic<T>(desired) {}

  constexpr CopyableAtomic(const CopyableAtomic<T>& other)
      : CopyableAtomic(other.load(std::memory_order_relaxed)) {}

  CopyableAtomic& operator=(const CopyableAtomic<T>& other) {
    this->store(other.load(std::memory_order_relaxed),
                std::memory_order_relaxed);
    return *this;
  }
};

} // namespace galois
#endif