1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/hal/fallback/FallbackAlarm.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,80 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#include "Hal.h"
1.9 +
1.10 +#include <algorithm>
1.11 +
1.12 +#include "mozilla/ClearOnShutdown.h"
1.13 +#include "mozilla/StaticPtr.h"
1.14 +#include "nsComponentManagerUtils.h"
1.15 +#include "nsITimer.h"
1.16 +#include "nsThreadUtils.h"
1.17 +
1.18 +namespace mozilla {
1.19 +namespace hal_impl {
1.20 +
1.21 +static void
1.22 +TimerCallbackFunc(nsITimer *aTimer, void *aClosure)
1.23 +{
1.24 + hal::NotifyAlarmFired();
1.25 +}
1.26 +
1.27 +static StaticRefPtr<nsITimer> sTimer;
1.28 +
1.29 +bool
1.30 +EnableAlarm()
1.31 +{
1.32 + static bool initialized = false;
1.33 + if (!initialized) {
1.34 + initialized = true;
1.35 + ClearOnShutdown(&sTimer);
1.36 + }
1.37 +
1.38 + nsCOMPtr<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1");
1.39 + sTimer = timer;
1.40 + MOZ_ASSERT(sTimer);
1.41 + return true;
1.42 +}
1.43 +
1.44 +void
1.45 +DisableAlarm()
1.46 +{
1.47 + /*
1.48 + * DisableAlarm() may be called after sTimer has been set to null by
1.49 + * ClearOnShutdown().
1.50 + */
1.51 + if (sTimer) {
1.52 + sTimer->Cancel();
1.53 + }
1.54 +}
1.55 +
1.56 +bool
1.57 +SetAlarm(int32_t aSeconds, int32_t aNanoseconds)
1.58 +{
1.59 + if (!sTimer) {
1.60 + HAL_LOG(("We should have enabled the alarm"));
1.61 + MOZ_ASSERT(false);
1.62 + return false;
1.63 + }
1.64 +
1.65 + // Do the math to convert aSeconds and aNanoseconds into milliseconds since
1.66 + // the epoch.
1.67 + int64_t milliseconds = static_cast<int64_t>(aSeconds) * 1000 +
1.68 + static_cast<int64_t>(aNanoseconds) / 1000000;
1.69 +
1.70 + // nsITimer expects relative milliseconds.
1.71 + int64_t relMilliseconds = milliseconds - PR_Now() / 1000;
1.72 +
1.73 + // If the alarm time is in the past relative to PR_Now(),
1.74 + // we choose to immediately fire the alarm. Passing 0 means nsITimer will
1.75 + // queue a timeout event immediately.
1.76 + sTimer->InitWithFuncCallback(TimerCallbackFunc, nullptr,
1.77 + clamped<int64_t>(relMilliseconds, 0, INT32_MAX),
1.78 + nsITimer::TYPE_ONE_SHOT);
1.79 + return true;
1.80 +}
1.81 +
1.82 +} // hal_impl
1.83 +} // namespace mozilla
