forked from mirrors/gecko-dev
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_layers_CompositorThread_h
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#define mozilla_layers_CompositorThread_h
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#include "nsISupportsImpl.h"
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#include "nsIThread.h"
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namespace mozilla::baseprofiler {
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class BaseProfilerThreadId;
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}
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using ProfilerThreadId = mozilla::baseprofiler::BaseProfilerThreadId;
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class nsIThread;
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namespace mozilla {
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namespace layers {
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class CompositorThreadHolder final {
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DELETE_ON_MAIN_THREAD(
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CompositorThreadHolder)
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public:
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CompositorThreadHolder();
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nsIThread* GetCompositorThread() const { return mCompositorThread; }
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/**
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* Returns true if the calling thread is the compositor thread. This works
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* even if the CompositorThread has begun to shutdown.
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*/
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bool IsInThread() {
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bool rv = false;
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MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mCompositorThread->IsOnCurrentThread(&rv)));
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return rv;
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}
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nsresult Dispatch(already_AddRefed<nsIRunnable> event,
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uint32_t flags = nsIEventTarget::DISPATCH_NORMAL) {
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return mCompositorThread->Dispatch(std::move(event), flags);
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}
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static CompositorThreadHolder* GetSingleton();
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static bool IsActive() { return !!GetSingleton(); }
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/**
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* Creates the compositor thread and the global compositor map.
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*/
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static void Start();
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/*
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* Waits for all [CrossProcess]CompositorBridgeParents to shutdown and
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* releases compositor-thread owned resources.
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*/
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static void Shutdown();
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// Returns true if the calling thread is the compositor thread.
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static bool IsInCompositorThread();
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// Thread id to use as a MarkerThreadId option for profiler markers.
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static ProfilerThreadId GetThreadId();
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private:
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~CompositorThreadHolder();
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const nsCOMPtr<nsIThread> mCompositorThread;
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static already_AddRefed<nsIThread> CreateCompositorThread();
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friend class CompositorBridgeParent;
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};
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nsIThread* CompositorThread();
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} // namespace layers
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} // namespace mozilla
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#endif // mozilla_layers_CompositorThread_h
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