Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 196 insertions, 0 deletions

diff --git a/widget/VsyncDispatcher.cpp b/widget/VsyncDispatcher.cpp
new file mode 100644
index 0000000000..ccb7151ee7
--- /dev/null
+++ b/widget/VsyncDispatcher.cpp
@@ -0,0 +1,196 @@
+/* -*- 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"
+
+using namespace mozilla::layers;
+
+namespace mozilla {
+
+CompositorVsyncDispatcher::CompositorVsyncDispatcher()
+    : mVsyncSource(gfxPlatform::GetPlatform()->GetHardwareVsync()),
+      mCompositorObserverLock("CompositorObserverLock"),
+      mDidShutdown(false) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+
+  mVsyncSource->RegisterCompositorVsyncDispatcher(this);
+}
+
+CompositorVsyncDispatcher::CompositorVsyncDispatcher(
+    RefPtr<gfx::VsyncSource> aVsyncSource)
+    : mVsyncSource(std::move(aVsyncSource)),
+      mCompositorObserverLock("CompositorObserverLock"),
+      mDidShutdown(false) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+
+  mVsyncSource->RegisterCompositorVsyncDispatcher(this);
+}
+
+CompositorVsyncDispatcher::~CompositorVsyncDispatcher() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  // We auto remove this vsync dispatcher from the vsync source in the
+  // nsBaseWidget
+}
+
+void CompositorVsyncDispatcher::NotifyVsync(const VsyncEvent& aVsync) {
+  // In vsync thread
+  layers::CompositorBridgeParent::PostInsertVsyncProfilerMarker(aVsync.mTime);
+
+  MutexAutoLock lock(mCompositorObserverLock);
+  if (mCompositorVsyncObserver) {
+    mCompositorVsyncObserver->NotifyVsync(aVsync);
+  }
+}
+
+void CompositorVsyncDispatcher::MoveToSource(
+    const RefPtr<gfx::VsyncSource>& aVsyncSource) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(XRE_IsParentProcess());
+  mVsyncSource = aVsyncSource;
+}
+
+void CompositorVsyncDispatcher::ObserveVsync(bool aEnable) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(XRE_IsParentProcess());
+  if (mDidShutdown) {
+    return;
+  }
+
+  if (aEnable) {
+    mVsyncSource->EnableCompositorVsyncDispatcher(this);
+  } else {
+    mVsyncSource->DisableCompositorVsyncDispatcher(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>(
+      "CompositorVsyncDispatcher::ObserveVsync", 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());
+  MOZ_ASSERT(!mDidShutdown);
+  ObserveVsync(false);
+  mDidShutdown = true;
+  {  // scope lock
+    MutexAutoLock lock(mCompositorObserverLock);
+    mCompositorVsyncObserver = nullptr;
+  }
+  mVsyncSource->DeregisterCompositorVsyncDispatcher(this);
+  mVsyncSource = nullptr;
+}
+
+RefreshTimerVsyncDispatcher::RefreshTimerVsyncDispatcher(
+    gfx::VsyncSource::Display* aDisplay)
+    : mDisplay(aDisplay), mRefreshTimersLock("RefreshTimers lock") {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+}
+
+RefreshTimerVsyncDispatcher::~RefreshTimerVsyncDispatcher() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+}
+
+void RefreshTimerVsyncDispatcher::MoveToDisplay(
+    gfx::VsyncSource::Display* aDisplay) {
+  MOZ_ASSERT(NS_IsMainThread());
+  mDisplay = aDisplay;
+}
+
+void RefreshTimerVsyncDispatcher::NotifyVsync(const VsyncEvent& aVsync) {
+  MutexAutoLock lock(mRefreshTimersLock);
+
+  for (size_t i = 0; i < mChildRefreshTimers.Length(); i++) {
+    mChildRefreshTimers[i]->NotifyVsync(aVsync);
+  }
+
+  if (mParentRefreshTimer) {
+    mParentRefreshTimer->NotifyVsync(aVsync);
+  }
+}
+
+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(
+        "RefreshTimerVsyncDispatcher::UpdateVsyncStatus", this,
+        &RefreshTimerVsyncDispatcher::UpdateVsyncStatus));
+    return;
+  }
+
+  mDisplay->NotifyRefreshTimerVsyncStatus(NeedsVsync());
+}
+
+bool RefreshTimerVsyncDispatcher::NeedsVsync() {
+  MOZ_ASSERT(NS_IsMainThread());
+  MutexAutoLock lock(mRefreshTimersLock);
+  return (mParentRefreshTimer != nullptr) || !mChildRefreshTimers.IsEmpty();
+}
+
+}  // namespace mozilla