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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef mozilla_layers_CompositorThread_h
#define mozilla_layers_CompositorThread_h
#include "nsISupportsImpl.h"
#include "nsIThread.h"
namespace mozilla::baseprofiler {
class BaseProfilerThreadId;
}
using ProfilerThreadId = mozilla::baseprofiler::BaseProfilerThreadId;
class nsIThread;
namespace mozilla {
namespace layers {
class CompositorThreadHolder final {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DELETE_ON_MAIN_THREAD(
CompositorThreadHolder)
public:
CompositorThreadHolder();
nsIThread* GetCompositorThread() const { return mCompositorThread; }
/**
* Returns true if the calling thread is the compositor thread. This works
* even if the CompositorThread has begun to shutdown.
*/
bool IsInThread() {
bool rv = false;
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mCompositorThread->IsOnCurrentThread(&rv)));
return rv;
}
nsresult Dispatch(already_AddRefed<nsIRunnable> event,
uint32_t flags = nsIEventTarget::DISPATCH_NORMAL) {
return mCompositorThread->Dispatch(std::move(event), flags);
}
static CompositorThreadHolder* GetSingleton();
static bool IsActive() { return !!GetSingleton(); }
/**
* Creates the compositor thread and the global compositor map.
*/
static void Start();
/*
* Waits for all [CrossProcess]CompositorBridgeParents to shutdown and
* releases compositor-thread owned resources.
*/
static void Shutdown();
// Returns true if the calling thread is the compositor thread.
static bool IsInCompositorThread();
// Thread id to use as a MarkerThreadId option for profiler markers.
static ProfilerThreadId GetThreadId();
private:
~CompositorThreadHolder();
const nsCOMPtr<nsIThread> mCompositorThread;
static already_AddRefed<nsIThread> CreateCompositorThread();
friend class CompositorBridgeParent;
};
nsIThread* CompositorThread();
} // namespace layers
} // namespace mozilla
#endif // mozilla_layers_CompositorThread_h
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