hal/fallback/FallbackAlarm.cpp@7e26c7da4463 (annotated)
hal/fallback/FallbackAlarm.cpp
Wed, 31 Dec 2014 06:55:50 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:55:50 +0100
- changeset 2
- 7e26c7da4463
- permissions
- -rw-r--r--
Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 3 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | #include "Hal.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #include <algorithm> |
| michael@0 | 8 | |
| michael@0 | 9 | #include "mozilla/ClearOnShutdown.h" |
| michael@0 | 10 | #include "mozilla/StaticPtr.h" |
| michael@0 | 11 | #include "nsComponentManagerUtils.h" |
| michael@0 | 12 | #include "nsITimer.h" |
| michael@0 | 13 | #include "nsThreadUtils.h" |
| michael@0 | 14 | |
| michael@0 | 15 | namespace mozilla { |
| michael@0 | 16 | namespace hal_impl { |
| michael@0 | 17 | |
| michael@0 | 18 | static void |
| michael@0 | 19 | TimerCallbackFunc(nsITimer *aTimer, void *aClosure) |
| michael@0 | 20 | { |
| michael@0 | 21 | hal::NotifyAlarmFired(); |
| michael@0 | 22 | } |
| michael@0 | 23 | |
| michael@0 | 24 | static StaticRefPtr<nsITimer> sTimer; |
| michael@0 | 25 | |
| michael@0 | 26 | bool |
| michael@0 | 27 | EnableAlarm() |
| michael@0 | 28 | { |
| michael@0 | 29 | static bool initialized = false; |
| michael@0 | 30 | if (!initialized) { |
| michael@0 | 31 | initialized = true; |
| michael@0 | 32 | ClearOnShutdown(&sTimer); |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1"); |
| michael@0 | 36 | sTimer = timer; |
| michael@0 | 37 | MOZ_ASSERT(sTimer); |
| michael@0 | 38 | return true; |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | void |
| michael@0 | 42 | DisableAlarm() |
| michael@0 | 43 | { |
| michael@0 | 44 | /* |
| michael@0 | 45 | * DisableAlarm() may be called after sTimer has been set to null by |
| michael@0 | 46 | * ClearOnShutdown(). |
| michael@0 | 47 | */ |
| michael@0 | 48 | if (sTimer) { |
| michael@0 | 49 | sTimer->Cancel(); |
| michael@0 | 50 | } |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | bool |
| michael@0 | 54 | SetAlarm(int32_t aSeconds, int32_t aNanoseconds) |
| michael@0 | 55 | { |
| michael@0 | 56 | if (!sTimer) { |
| michael@0 | 57 | HAL_LOG(("We should have enabled the alarm")); |
| michael@0 | 58 | MOZ_ASSERT(false); |
| michael@0 | 59 | return false; |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | // Do the math to convert aSeconds and aNanoseconds into milliseconds since |
| michael@0 | 63 | // the epoch. |
| michael@0 | 64 | int64_t milliseconds = static_cast<int64_t>(aSeconds) * 1000 + |
| michael@0 | 65 | static_cast<int64_t>(aNanoseconds) / 1000000; |
| michael@0 | 66 | |
| michael@0 | 67 | // nsITimer expects relative milliseconds. |
| michael@0 | 68 | int64_t relMilliseconds = milliseconds - PR_Now() / 1000; |
| michael@0 | 69 | |
| michael@0 | 70 | // If the alarm time is in the past relative to PR_Now(), |
| michael@0 | 71 | // we choose to immediately fire the alarm. Passing 0 means nsITimer will |
| michael@0 | 72 | // queue a timeout event immediately. |
| michael@0 | 73 | sTimer->InitWithFuncCallback(TimerCallbackFunc, nullptr, |
| michael@0 | 74 | clamped<int64_t>(relMilliseconds, 0, INT32_MAX), |
| michael@0 | 75 | nsITimer::TYPE_ONE_SHOT); |
| michael@0 | 76 | return true; |
| michael@0 | 77 | } |
| michael@0 | 78 | |
| michael@0 | 79 | } // hal_impl |
| michael@0 | 80 | } // namespace mozilla |
