/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:expandtab:shiftwidth=4:tabstop=4:
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsIdleServiceWin_h__
#define nsIdleServiceWin_h__

#include "nsIdleService.h"

/* NOTE: Compare of GetTickCount() could overflow.  This corrects for
 * overflow situations.
 ***/
#ifndef SAFE_COMPARE_EVEN_WITH_WRAPPING
#define SAFE_COMPARE_EVEN_WITH_WRAPPING(A, B) \
  (((int)((long)A - (long)B) & 0xFFFFFFFF))
#endif

class nsIdleServiceWin : public nsIdleService {
 public:
  NS_INLINE_DECL_REFCOUNTING_INHERITED(nsIdleServiceWin, nsIdleService)

  bool PollIdleTime(uint32_t* aIdleTime) override;

  static already_AddRefed<nsIdleServiceWin> GetInstance() {
    RefPtr<nsIdleServiceWin> idleService =
        nsIdleService::GetInstance().downcast<nsIdleServiceWin>();
    if (!idleService) {
      idleService = new nsIdleServiceWin();
    }

    return idleService.forget();
  }

 protected:
  nsIdleServiceWin() {}
  virtual ~nsIdleServiceWin() {}
  bool UsePollMode() override;
};

#endif  // nsIdleServiceWin_h__