From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 gfx/ipc/VsyncBridgeChild.cpp | 155 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 gfx/ipc/VsyncBridgeChild.cpp

(limited to 'gfx/ipc/VsyncBridgeChild.cpp')

diff --git a/gfx/ipc/VsyncBridgeChild.cpp b/gfx/ipc/VsyncBridgeChild.cpp
new file mode 100644
index 000000000..a4be827ef
--- /dev/null
+++ b/gfx/ipc/VsyncBridgeChild.cpp
@@ -0,0 +1,155 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=99: */
+/* 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 "VsyncBridgeChild.h"
+#include "VsyncIOThreadHolder.h"
+#include "mozilla/dom/ContentChild.h"
+
+namespace mozilla {
+namespace gfx {
+
+VsyncBridgeChild::VsyncBridgeChild(RefPtr<VsyncIOThreadHolder> aThread, const uint64_t& aProcessToken)
+ : mThread(aThread),
+   mLoop(nullptr),
+   mProcessToken(aProcessToken)
+{
+}
+
+VsyncBridgeChild::~VsyncBridgeChild()
+{
+}
+
+/* static */ RefPtr<VsyncBridgeChild>
+VsyncBridgeChild::Create(RefPtr<VsyncIOThreadHolder> aThread,
+                         const uint64_t& aProcessToken,
+                         Endpoint<PVsyncBridgeChild>&& aEndpoint)
+{
+  RefPtr<VsyncBridgeChild> child = new VsyncBridgeChild(aThread, aProcessToken);
+
+  RefPtr<nsIRunnable> task = NewRunnableMethod<Endpoint<PVsyncBridgeChild>&&>(
+    child, &VsyncBridgeChild::Open, Move(aEndpoint));
+  aThread->GetThread()->Dispatch(task.forget(), nsIThread::DISPATCH_NORMAL);
+
+  return child;
+}
+
+void
+VsyncBridgeChild::Open(Endpoint<PVsyncBridgeChild>&& aEndpoint)
+{
+  if (!aEndpoint.Bind(this)) {
+    // The GPU Process Manager might be gone if we receive ActorDestroy very
+    // late in shutdown.
+    if (GPUProcessManager* gpm = GPUProcessManager::Get())
+      gpm->NotifyRemoteActorDestroyed(mProcessToken);
+    return;
+  }
+
+  mLoop = MessageLoop::current();
+
+  // Last reference is freed in DeallocPVsyncBridgeChild.
+  AddRef();
+}
+
+class NotifyVsyncTask : public Runnable
+{
+public:
+  NotifyVsyncTask(RefPtr<VsyncBridgeChild> aVsyncBridge,
+                  TimeStamp aTimeStamp,
+                  const uint64_t& aLayersId)
+   : mVsyncBridge(aVsyncBridge),
+     mTimeStamp(aTimeStamp),
+     mLayersId(aLayersId)
+  {}
+
+  NS_IMETHOD Run() override {
+    mVsyncBridge->NotifyVsyncImpl(mTimeStamp, mLayersId);
+    return NS_OK;
+  }
+
+private:
+  RefPtr<VsyncBridgeChild> mVsyncBridge;
+  TimeStamp mTimeStamp;
+  uint64_t mLayersId;
+};
+
+bool
+VsyncBridgeChild::IsOnVsyncIOThread() const
+{
+  return MessageLoop::current() == mLoop;
+}
+
+void
+VsyncBridgeChild::NotifyVsync(TimeStamp aTimeStamp, const uint64_t& aLayersId)
+{
+  // This should be on the Vsync thread (not the Vsync I/O thread).
+  MOZ_ASSERT(!IsOnVsyncIOThread());
+
+  RefPtr<NotifyVsyncTask> task = new NotifyVsyncTask(this, aTimeStamp, aLayersId);
+  mLoop->PostTask(task.forget());
+}
+
+void
+VsyncBridgeChild::NotifyVsyncImpl(TimeStamp aTimeStamp, const uint64_t& aLayersId)
+{
+  // This should be on the Vsync I/O thread.
+  MOZ_ASSERT(IsOnVsyncIOThread());
+
+  if (!mProcessToken) {
+    return;
+  }
+  SendNotifyVsync(aTimeStamp, aLayersId);
+}
+
+void
+VsyncBridgeChild::Close()
+{
+  if (!IsOnVsyncIOThread()) {
+    mLoop->PostTask(NewRunnableMethod(this, &VsyncBridgeChild::Close));
+    return;
+  }
+
+  // We clear mProcessToken when the channel is closed.
+  if (!mProcessToken) {
+    return;
+  }
+
+  // Clear the process token so we don't notify the GPUProcessManager. It already
+  // knows we're closed since it manually called Close, and in fact the GPM could
+  // have already been destroyed during shutdown.
+  mProcessToken = 0;
+
+  // Close the underlying IPC channel.
+  PVsyncBridgeChild::Close();
+}
+
+void
+VsyncBridgeChild::ActorDestroy(ActorDestroyReason aWhy)
+{
+  if (mProcessToken) {
+    GPUProcessManager::Get()->NotifyRemoteActorDestroyed(mProcessToken);
+    mProcessToken = 0;
+  }
+}
+
+void
+VsyncBridgeChild::DeallocPVsyncBridgeChild()
+{
+  Release();
+}
+
+void
+VsyncBridgeChild::ProcessingError(Result aCode, const char* aReason)
+{
+  MOZ_RELEASE_ASSERT(aCode == MsgDropped, "Processing error in VsyncBridgeChild");
+}
+
+void
+VsyncBridgeChild::HandleFatalError(const char* aName, const char* aMsg) const
+{
+  dom::ContentChild::FatalErrorIfNotUsingGPUProcess(aName, aMsg, OtherPid());
+}
+
+} // namespace gfx
+} // namespace mozilla
-- 
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