gecko-dev/widget/windows/nsIdleServiceWin.h

48 строки
1.2 KiB
C++

/* -*- 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_DECL_ISUPPORTS_INHERITED
bool PollIdleTime(uint32_t* aIdleTime);
static already_AddRefed<nsIdleServiceWin> GetInstance()
{
nsIdleServiceWin* idleService =
static_cast<nsIdleServiceWin*>(nsIdleService::GetInstance().get());
if (!idleService) {
idleService = new nsIdleServiceWin();
NS_ADDREF(idleService);
}
return idleService;
}
protected:
nsIdleServiceWin() { }
virtual ~nsIdleServiceWin() { }
bool UsePollMode();
};
#endif // nsIdleServiceWin_h__