The Tor Browser / file comparison
comparison: hal/fallback/FallbackAlarm.cpp
hal/fallback/FallbackAlarm.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:ba7010af78cf |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "Hal.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "mozilla/ClearOnShutdown.h" | |
| 10 #include "mozilla/StaticPtr.h" | |
| 11 #include "nsComponentManagerUtils.h" | |
| 12 #include "nsITimer.h" | |
| 13 #include "nsThreadUtils.h" | |
| 14 | |
| 15 namespace mozilla { | |
| 16 namespace hal_impl { | |
| 17 | |
| 18 static void | |
| 19 TimerCallbackFunc(nsITimer *aTimer, void *aClosure) | |
| 20 { | |
| 21 hal::NotifyAlarmFired(); | |
| 22 } | |
| 23 | |
| 24 static StaticRefPtr<nsITimer> sTimer; | |
| 25 | |
| 26 bool | |
| 27 EnableAlarm() | |
| 28 { | |
| 29 static bool initialized = false; | |
| 30 if (!initialized) { | |
| 31 initialized = true; | |
| 32 ClearOnShutdown(&sTimer); | |
| 33 } | |
| 34 | |
| 35 nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1"); | |
| 36 sTimer = timer; | |
| 37 MOZ_ASSERT(sTimer); | |
| 38 return true; | |
| 39 } | |
| 40 | |
| 41 void | |
| 42 DisableAlarm() | |
| 43 { | |
| 44 /* | |
| 45 * DisableAlarm() may be called after sTimer has been set to null by | |
| 46 * ClearOnShutdown(). | |
| 47 */ | |
| 48 if (sTimer) { | |
| 49 sTimer->Cancel(); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 bool | |
| 54 SetAlarm(int32_t aSeconds, int32_t aNanoseconds) | |
| 55 { | |
| 56 if (!sTimer) { | |
| 57 HAL_LOG(("We should have enabled the alarm")); | |
| 58 MOZ_ASSERT(false); | |
| 59 return false; | |
| 60 } | |
| 61 | |
| 62 // Do the math to convert aSeconds and aNanoseconds into milliseconds since | |
| 63 // the epoch. | |
| 64 int64_t milliseconds = static_cast<int64_t>(aSeconds) * 1000 + | |
| 65 static_cast<int64_t>(aNanoseconds) / 1000000; | |
| 66 | |
| 67 // nsITimer expects relative milliseconds. | |
| 68 int64_t relMilliseconds = milliseconds - PR_Now() / 1000; | |
| 69 | |
| 70 // If the alarm time is in the past relative to PR_Now(), | |
| 71 // we choose to immediately fire the alarm. Passing 0 means nsITimer will | |
| 72 // queue a timeout event immediately. | |
| 73 sTimer->InitWithFuncCallback(TimerCallbackFunc, nullptr, | |
| 74 clamped<int64_t>(relMilliseconds, 0, INT32_MAX), | |
| 75 nsITimer::TYPE_ONE_SHOT); | |
| 76 return true; | |
| 77 } | |
| 78 | |
| 79 } // hal_impl | |
| 80 } // namespace mozilla |
