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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "VRThread.h"
#include "nsDebug.h"
#include "nsThreadManager.h"
#include "nsThread.h"
#include "nsThreadUtils.h"
namespace mozilla {
namespace gfx {
static const uint32_t kDefaultThreadLifeTime = 60; // in 60 seconds.
static const uint32_t kDelayPostTaskTime = 20000; // in 20000 ms.
VRThread::VRThread(const nsCString& aName)
: mThread(nullptr), mLifeTime(kDefaultThreadLifeTime), mStarted(false) {
mName = aName;
}
VRThread::~VRThread() { Shutdown(); }
void VRThread::Start() {
if (!mThread) {
nsresult rv = NS_NewNamedThread(mName, getter_AddRefs(mThread));
MOZ_ASSERT(mThread);
if (NS_FAILED(rv)) {
MOZ_ASSERT(false, "Failed to create a vr thread.");
}
RefPtr<Runnable> runnable =
NewRunnableMethod<TimeStamp>("gfx::VRThread::CheckLife", this,
&VRThread::CheckLife, TimeStamp::Now());
// Post it to the main thread for tracking the lifetime.
nsCOMPtr<nsIThread> mainThread;
rv = NS_GetMainThread(getter_AddRefs(mainThread));
if (NS_FAILED(rv)) {
NS_WARNING("VRThread::Start() could not get Main thread");
return;
}
mainThread->DelayedDispatch(runnable.forget(), kDelayPostTaskTime);
}
mStarted = true;
mLastActiveTime = TimeStamp::Now();
}
void VRThread::Shutdown() {
if (mThread) {
if (nsThreadManager::get().IsNSThread()) {
mThread->Shutdown();
} else {
NS_WARNING(
"VRThread::Shutdown() may only be called from an XPCOM thread");
NS_DispatchToMainThread(NS_NewRunnableFunction(
"VRThread::Shutdown", [thread = mThread]() { thread->Shutdown(); }));
}
mThread = nullptr;
}
mStarted = false;
}
const nsCOMPtr<nsIThread> VRThread::GetThread() const { return mThread; }
void VRThread::PostTask(already_AddRefed<Runnable> aTask) {
PostDelayedTask(std::move(aTask), 0);
}
void VRThread::PostDelayedTask(already_AddRefed<Runnable> aTask,
uint32_t aTime) {
MOZ_ASSERT(mStarted, "Must call Start() before posting tasks.");
MOZ_ASSERT(mThread);
mLastActiveTime = TimeStamp::Now();
if (!aTime) {
mThread->Dispatch(std::move(aTask), NS_DISPATCH_NORMAL);
} else {
mThread->DelayedDispatch(std::move(aTask), aTime);
}
}
void VRThread::CheckLife(TimeStamp aCheckTimestamp) {
// VR system is going to shutdown.
if (!mStarted) {
Shutdown();
return;
}
const TimeDuration timeout = TimeDuration::FromSeconds(mLifeTime);
if ((aCheckTimestamp - mLastActiveTime) > timeout) {
Shutdown();
} else {
RefPtr<Runnable> runnable =
NewRunnableMethod<TimeStamp>("gfx::VRThread::CheckLife", this,
&VRThread::CheckLife, TimeStamp::Now());
// Post it to the main thread for tracking the lifetime.
nsCOMPtr<nsIThread> mainThread;
nsresult rv = NS_GetMainThread(getter_AddRefs(mainThread));
if (NS_FAILED(rv)) {
NS_WARNING("VRThread::CheckLife() could not get Main thread");
return;
}
mainThread->DelayedDispatch(runnable.forget(), kDelayPostTaskTime);
}
}
void VRThread::SetLifeTime(uint32_t aLifeTime) { mLifeTime = aLifeTime; }
uint32_t VRThread::GetLifeTime() { return mLifeTime; }
bool VRThread::IsActive() { return !!mThread; }
} // namespace gfx
} // namespace mozilla