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/* -*- Mode: C++; tab-width: 8; 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 "CompositorThread.h"
#include "MainThreadUtils.h"
#include "nsThreadUtils.h"
#include "CompositorBridgeParent.h"
#include "mozilla/layers/ImageBridgeParent.h"
#include "mozilla/media/MediaSystemResourceService.h"
namespace mozilla {
namespace layers {
static StaticRefPtr<CompositorThreadHolder> sCompositorThreadHolder;
static bool sFinishedCompositorShutDown = false;
// See ImageBridgeChild.cpp
void ReleaseImageBridgeParentSingleton();
CompositorThreadHolder* GetCompositorThreadHolder()
{
return sCompositorThreadHolder;
}
base::Thread*
CompositorThread()
{
return sCompositorThreadHolder
? sCompositorThreadHolder->GetCompositorThread()
: nullptr;
}
/* static */ MessageLoop*
CompositorThreadHolder::Loop()
{
return CompositorThread() ? CompositorThread()->message_loop() : nullptr;
}
CompositorThreadHolder*
CompositorThreadHolder::GetSingleton()
{
return sCompositorThreadHolder;
}
CompositorThreadHolder::CompositorThreadHolder()
: mCompositorThread(CreateCompositorThread())
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_COUNT_CTOR(CompositorThreadHolder);
}
CompositorThreadHolder::~CompositorThreadHolder()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_COUNT_DTOR(CompositorThreadHolder);
DestroyCompositorThread(mCompositorThread);
}
/* static */ void
CompositorThreadHolder::DestroyCompositorThread(base::Thread* aCompositorThread)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!sCompositorThreadHolder, "We shouldn't be destroying the compositor thread yet.");
CompositorBridgeParent::Shutdown();
delete aCompositorThread;
sFinishedCompositorShutDown = true;
}
/* static */ base::Thread*
CompositorThreadHolder::CreateCompositorThread()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!sCompositorThreadHolder, "The compositor thread has already been started!");
base::Thread* compositorThread = new base::Thread("Compositor");
base::Thread::Options options;
/* Timeout values are powers-of-two to enable us get better data.
128ms is chosen for transient hangs because 8Hz should be the minimally
acceptable goal for Compositor responsiveness (normal goal is 60Hz). */
options.transient_hang_timeout = 128; // milliseconds
/* 2048ms is chosen for permanent hangs because it's longer than most
* Compositor hangs seen in the wild, but is short enough to not miss getting
* native hang stacks. */
options.permanent_hang_timeout = 2048; // milliseconds
#if defined(_WIN32)
/* With d3d9 the compositor thread creates native ui, see DeviceManagerD3D9. As
* such the thread is a gui thread, and must process a windows message queue or
* risk deadlocks. Chromium message loop TYPE_UI does exactly what we need. */
options.message_loop_type = MessageLoop::TYPE_UI;
#endif
if (!compositorThread->StartWithOptions(options)) {
delete compositorThread;
return nullptr;
}
CompositorBridgeParent::Setup();
ImageBridgeParent::Setup();
return compositorThread;
}
void
CompositorThreadHolder::Start()
{
MOZ_ASSERT(NS_IsMainThread(), "Should be on the main Thread!");
MOZ_ASSERT(!sCompositorThreadHolder, "The compositor thread has already been started!");
sCompositorThreadHolder = new CompositorThreadHolder();
}
void
CompositorThreadHolder::Shutdown()
{
MOZ_ASSERT(NS_IsMainThread(), "Should be on the main Thread!");
MOZ_ASSERT(sCompositorThreadHolder, "The compositor thread has already been shut down!");
ReleaseImageBridgeParentSingleton();
MediaSystemResourceService::Shutdown();
sCompositorThreadHolder = nullptr;
// No locking is needed around sFinishedCompositorShutDown because it is only
// ever accessed on the main thread.
while (!sFinishedCompositorShutDown) {
NS_ProcessNextEvent(nullptr, true);
}
CompositorBridgeParent::FinishShutdown();
}
/* static */ bool
CompositorThreadHolder::IsInCompositorThread()
{
return CompositorThread() &&
CompositorThread()->thread_id() == PlatformThread::CurrentId();
}
} // namespace mozilla
} // namespace layers
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