1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ 2 /* vim:expandtab:shiftwidth=4:tabstop=4: 3 */ 4 /* This Source Code Form is subject to the terms of the Mozilla Public 5 * License, v. 2.0. If a copy of the MPL was not distributed with this 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 7 8 #ifndef nsIdleServiceWin_h__ 9 #define nsIdleServiceWin_h__ 10 11 #include "nsIdleService.h" 12 13 /* NOTE: Compare of GetTickCount() could overflow. This corrects for 14 * overflow situations. 15 ***/ 16 #ifndef SAFE_COMPARE_EVEN_WITH_WRAPPING 17 #define SAFE_COMPARE_EVEN_WITH_WRAPPING(A, B) \ 18 (((int)((long)A - (long)B) & 0xFFFFFFFF)) 19 #endif 20 21 class nsIdleServiceWin : public nsIdleService { 22 public: 23 NS_INLINE_DECL_REFCOUNTING_INHERITED(nsIdleServiceWin, nsIdleService) 24 25 bool PollIdleTime(uint32_t* aIdleTime) override; 26 GetInstance()27 static already_AddRefed<nsIdleServiceWin> GetInstance() { 28 RefPtr<nsIdleServiceWin> idleService = 29 nsIdleService::GetInstance().downcast<nsIdleServiceWin>(); 30 if (!idleService) { 31 idleService = new nsIdleServiceWin(); 32 } 33 34 return idleService.forget(); 35 } 36 37 protected: nsIdleServiceWin()38 nsIdleServiceWin() {} ~nsIdleServiceWin()39 virtual ~nsIdleServiceWin() {} 40 bool UsePollMode() override; 41 }; 42 43 #endif // nsIdleServiceWin_h__ 44