forked from mirrors/gecko-dev
6f3e18ab53
The Runnable markers in the profilers are handy, but miss many types of runnables. This includes most of those that wrap another runnable and run that at a (possibly) later time. AbstractThread, TaskDispatcher and TaskQueue does this for e.g. tail dispatched tasks. TaskQueueWrapper does this when wrapping webrtc tasks (and Mozilla Runnables) to be run in a Mozilla TaskQueue with some overhead on the stack. DelayedRunnable wraps a runnable to be run after a timeout. It would perhaps be better in many cases to ignore the intermediate runnables, but I haven't seen a straight forward way to achieve this. More detailed data could be added on a case by case basis, for instance the delay for a DelayedRunnable (incl. actual vs. target delay) or the scope of a task in which a tail-dispatched runnable was dispatched. But this is also true for the status quo (for instance the time from dispatch to run) so I leave these ideas as future work. Differential Revision: https://phabricator.services.mozilla.com/D135027
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "DelayedRunnable.h"
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#include "mozilla/ProfilerRunnable.h"
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namespace mozilla {
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DelayedRunnable::DelayedRunnable(already_AddRefed<nsIEventTarget> aTarget,
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already_AddRefed<nsIRunnable> aRunnable,
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uint32_t aDelay)
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: mozilla::Runnable("DelayedRunnable"),
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mTarget(aTarget),
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mObserver(do_QueryInterface(mTarget)),
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mWrappedRunnable(aRunnable),
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mDelayedFrom(TimeStamp::NowLoRes()),
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mDelay(aDelay) {
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MOZ_DIAGNOSTIC_ASSERT(mObserver,
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"Target must implement nsIDelayedRunnableObserver");
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}
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nsresult DelayedRunnable::Init() {
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mObserver->OnDelayedRunnableCreated(this);
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return NS_NewTimerWithCallback(getter_AddRefs(mTimer), this, mDelay,
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nsITimer::TYPE_ONE_SHOT, mTarget);
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}
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void DelayedRunnable::CancelTimer() {
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MOZ_ASSERT(mTarget->IsOnCurrentThread());
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mTimer->Cancel();
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}
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NS_IMETHODIMP DelayedRunnable::Run() {
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MOZ_ASSERT(mTimer, "DelayedRunnable without Init?");
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// Already ran?
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if (!mWrappedRunnable) {
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return NS_OK;
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}
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// Are we too early?
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if ((mozilla::TimeStamp::NowLoRes() - mDelayedFrom).ToMilliseconds() <
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mDelay) {
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if (mObserver) {
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mObserver->OnDelayedRunnableScheduled(this);
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}
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return NS_OK; // Let the nsITimer run us.
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}
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mTimer->Cancel();
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return DoRun();
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}
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NS_IMETHODIMP DelayedRunnable::Notify(nsITimer* aTimer) {
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// If we already ran, the timer should have been canceled.
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MOZ_ASSERT(mWrappedRunnable);
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if (mObserver) {
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mObserver->OnDelayedRunnableRan(this);
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}
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return DoRun();
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}
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nsresult DelayedRunnable::DoRun() {
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nsCOMPtr<nsIRunnable> r = std::move(mWrappedRunnable);
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AUTO_PROFILE_FOLLOWING_RUNNABLE(r);
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return r->Run();
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}
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NS_IMPL_ISUPPORTS_INHERITED(DelayedRunnable, Runnable, nsITimerCallback)
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} // namespace mozilla
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