mirror of
https://github.com/mozilla/gecko-dev.git
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118 lines
3.6 KiB
C++
118 lines
3.6 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 "VRThread.h"
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#include "nsDebug.h"
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#include "nsThreadManager.h"
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#include "nsThread.h"
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#include "nsThreadUtils.h"
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namespace mozilla {
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namespace gfx {
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static const uint32_t kDefaultThreadLifeTime = 60; // in 60 seconds.
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static const uint32_t kDelayPostTaskTime = 20000; // in 20000 ms.
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VRThread::VRThread(const nsCString& aName)
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: mThread(nullptr), mLifeTime(kDefaultThreadLifeTime), mStarted(false) {
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mName = aName;
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}
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VRThread::~VRThread() { Shutdown(); }
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void VRThread::Start() {
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if (!mThread) {
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nsresult rv = NS_NewNamedThread(mName, getter_AddRefs(mThread));
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MOZ_ASSERT(mThread);
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if (NS_FAILED(rv)) {
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MOZ_ASSERT(false, "Failed to create a vr thread.");
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}
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RefPtr<Runnable> runnable =
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NewRunnableMethod<TimeStamp>("gfx::VRThread::CheckLife", this,
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&VRThread::CheckLife, TimeStamp::Now());
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// Post it to the main thread for tracking the lifetime.
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nsCOMPtr<nsIThread> mainThread;
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rv = NS_GetMainThread(getter_AddRefs(mainThread));
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if (NS_FAILED(rv)) {
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NS_WARNING("VRThread::Start() could not get Main thread");
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return;
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}
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mainThread->DelayedDispatch(runnable.forget(), kDelayPostTaskTime);
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}
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mStarted = true;
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mLastActiveTime = TimeStamp::Now();
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}
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void VRThread::Shutdown() {
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if (mThread) {
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if (nsThreadManager::get().IsNSThread()) {
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mThread->Shutdown();
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} else {
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NS_WARNING(
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"VRThread::Shutdown() may only be called from an XPCOM thread");
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NS_DispatchToMainThread(NS_NewRunnableFunction(
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"VRThread::Shutdown", [thread = mThread]() { thread->Shutdown(); }));
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}
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mThread = nullptr;
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}
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mStarted = false;
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}
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const nsCOMPtr<nsIThread> VRThread::GetThread() const { return mThread; }
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void VRThread::PostTask(already_AddRefed<Runnable> aTask) {
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PostDelayedTask(std::move(aTask), 0);
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}
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void VRThread::PostDelayedTask(already_AddRefed<Runnable> aTask,
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uint32_t aTime) {
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MOZ_ASSERT(mStarted, "Must call Start() before posting tasks.");
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MOZ_ASSERT(mThread);
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mLastActiveTime = TimeStamp::Now();
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if (!aTime) {
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mThread->Dispatch(std::move(aTask), NS_DISPATCH_NORMAL);
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} else {
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mThread->DelayedDispatch(std::move(aTask), aTime);
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}
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}
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void VRThread::CheckLife(TimeStamp aCheckTimestamp) {
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// VR system is going to shutdown.
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if (!mStarted) {
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Shutdown();
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return;
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}
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const TimeDuration timeout = TimeDuration::FromSeconds(mLifeTime);
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if ((aCheckTimestamp - mLastActiveTime) > timeout) {
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Shutdown();
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} else {
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RefPtr<Runnable> runnable =
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NewRunnableMethod<TimeStamp>("gfx::VRThread::CheckLife", this,
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&VRThread::CheckLife, TimeStamp::Now());
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// Post it to the main thread for tracking the lifetime.
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nsCOMPtr<nsIThread> mainThread;
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nsresult rv = NS_GetMainThread(getter_AddRefs(mainThread));
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if (NS_FAILED(rv)) {
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NS_WARNING("VRThread::CheckLife() could not get Main thread");
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return;
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}
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mainThread->DelayedDispatch(runnable.forget(), kDelayPostTaskTime);
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}
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}
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void VRThread::SetLifeTime(uint32_t aLifeTime) { mLifeTime = aLifeTime; }
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uint32_t VRThread::GetLifeTime() { return mLifeTime; }
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bool VRThread::IsActive() { return !!mThread; }
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} // namespace gfx
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} // namespace mozilla
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