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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MainThreadUtils.h"
#include "VsyncDispatcher.h"
#include "VsyncSource.h"
#include "gfxPlatform.h"
#include "mozilla/layers/Compositor.h"
#include "mozilla/layers/CompositorBridgeParent.h"
#include "mozilla/layers/CompositorThread.h"
namespace mozilla {
CompositorVsyncDispatcher::CompositorVsyncDispatcher()
: mCompositorObserverLock("CompositorObserverLock")
, mDidShutdown(false)
{
MOZ_ASSERT(XRE_IsParentProcess());
MOZ_ASSERT(NS_IsMainThread());
}
CompositorVsyncDispatcher::~CompositorVsyncDispatcher()
{
MOZ_ASSERT(XRE_IsParentProcess());
// We auto remove this vsync dispatcher from the vsync source in the nsBaseWidget
}
void
CompositorVsyncDispatcher::NotifyVsync(TimeStamp aVsyncTimestamp)
{
MutexAutoLock lock(mCompositorObserverLock);
if (mCompositorVsyncObserver) {
mCompositorVsyncObserver->NotifyVsync(aVsyncTimestamp);
}
}
void
CompositorVsyncDispatcher::ObserveVsync(bool aEnable)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(XRE_IsParentProcess());
if (mDidShutdown) {
return;
}
if (aEnable) {
gfxPlatform::GetPlatform()->GetHardwareVsync()->AddCompositorVsyncDispatcher(this);
} else {
gfxPlatform::GetPlatform()->GetHardwareVsync()->RemoveCompositorVsyncDispatcher(this);
}
}
void
CompositorVsyncDispatcher::SetCompositorVsyncObserver(VsyncObserver* aVsyncObserver)
{
// When remote compositing or running gtests, vsync observation is
// initiated on the main thread. Otherwise, it is initiated from the compositor
// thread.
MOZ_ASSERT(NS_IsMainThread() || CompositorThreadHolder::IsInCompositorThread());
{ // scope lock
MutexAutoLock lock(mCompositorObserverLock);
mCompositorVsyncObserver = aVsyncObserver;
}
bool observeVsync = aVsyncObserver != nullptr;
nsCOMPtr<nsIRunnable> vsyncControl = NewRunnableMethod<bool>(this,
&CompositorVsyncDispatcher::ObserveVsync,
observeVsync);
NS_DispatchToMainThread(vsyncControl);
}
void
CompositorVsyncDispatcher::Shutdown()
{
// Need to explicitly remove CompositorVsyncDispatcher when the nsBaseWidget shuts down.
// Otherwise, we would get dead vsync notifications between when the nsBaseWidget
// shuts down and the CompositorBridgeParent shuts down.
MOZ_ASSERT(XRE_IsParentProcess());
MOZ_ASSERT(NS_IsMainThread());
ObserveVsync(false);
mDidShutdown = true;
{ // scope lock
MutexAutoLock lock(mCompositorObserverLock);
mCompositorVsyncObserver = nullptr;
}
}
RefreshTimerVsyncDispatcher::RefreshTimerVsyncDispatcher()
: mRefreshTimersLock("RefreshTimers lock")
{
MOZ_ASSERT(XRE_IsParentProcess());
MOZ_ASSERT(NS_IsMainThread());
}
RefreshTimerVsyncDispatcher::~RefreshTimerVsyncDispatcher()
{
MOZ_ASSERT(XRE_IsParentProcess());
MOZ_ASSERT(NS_IsMainThread());
}
void
RefreshTimerVsyncDispatcher::NotifyVsync(TimeStamp aVsyncTimestamp)
{
MutexAutoLock lock(mRefreshTimersLock);
for (size_t i = 0; i < mChildRefreshTimers.Length(); i++) {
mChildRefreshTimers[i]->NotifyVsync(aVsyncTimestamp);
}
if (mParentRefreshTimer) {
mParentRefreshTimer->NotifyVsync(aVsyncTimestamp);
}
}
void
RefreshTimerVsyncDispatcher::SetParentRefreshTimer(VsyncObserver* aVsyncObserver)
{
MOZ_ASSERT(NS_IsMainThread());
{ // lock scope because UpdateVsyncStatus runs on main thread and will deadlock
MutexAutoLock lock(mRefreshTimersLock);
mParentRefreshTimer = aVsyncObserver;
}
UpdateVsyncStatus();
}
void
RefreshTimerVsyncDispatcher::AddChildRefreshTimer(VsyncObserver* aVsyncObserver)
{
{ // scope lock - called on pbackground thread
MutexAutoLock lock(mRefreshTimersLock);
MOZ_ASSERT(aVsyncObserver);
if (!mChildRefreshTimers.Contains(aVsyncObserver)) {
mChildRefreshTimers.AppendElement(aVsyncObserver);
}
}
UpdateVsyncStatus();
}
void
RefreshTimerVsyncDispatcher::RemoveChildRefreshTimer(VsyncObserver* aVsyncObserver)
{
{ // scope lock - called on pbackground thread
MutexAutoLock lock(mRefreshTimersLock);
MOZ_ASSERT(aVsyncObserver);
mChildRefreshTimers.RemoveElement(aVsyncObserver);
}
UpdateVsyncStatus();
}
void
RefreshTimerVsyncDispatcher::UpdateVsyncStatus()
{
if (!NS_IsMainThread()) {
NS_DispatchToMainThread(NewRunnableMethod(this,
&RefreshTimerVsyncDispatcher::UpdateVsyncStatus));
return;
}
gfx::VsyncSource::Display& display = gfxPlatform::GetPlatform()->GetHardwareVsync()->GetGlobalDisplay();
display.NotifyRefreshTimerVsyncStatus(NeedsVsync());
}
bool
RefreshTimerVsyncDispatcher::NeedsVsync()
{
MOZ_ASSERT(NS_IsMainThread());
MutexAutoLock lock(mRefreshTimersLock);
return (mParentRefreshTimer != nullptr) || !mChildRefreshTimers.IsEmpty();
}
} // namespace mozilla
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