ScopeGuard.h

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/*
 * Copyright (c) 2016-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under both the BSD-style license (found in the
 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
 * in the COPYING file in the root directory of this source tree).
 */
#pragma once
 
#include <utility>
 
namespace pzstd {
 
template <typename Function>
class ScopeGuard {
  Function function;
  bool dismissed;
 
 public:
  explicit ScopeGuard(Function&& function)
      : function(std::move(function)), dismissed(false) {}
 
  void dismiss() {
    dismissed = true;
  }
 
  ~ScopeGuard() noexcept {
    if (!dismissed) {
      function();
    }
  }
};
 
template <typename Function>
ScopeGuard<Function> makeScopeGuard(Function&& function) {
  return ScopeGuard<Function>(std::forward<Function>(function));
}
}