зеркало из https://github.com/mozilla/gecko-dev.git
128 строки
4.1 KiB
C++
128 строки
4.1 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 _include_dom_media_ipc_RDDProcessManager_h_
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#define _include_dom_media_ipc_RDDProcessManager_h_
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#include "mozilla/MozPromise.h"
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#include "mozilla/PRemoteDecoderManagerChild.h"
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#include "mozilla/RDDProcessHost.h"
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#include "mozilla/ipc/TaskFactory.h"
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#include "mozilla/PRDDChild.h"
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#include "nsIObserver.h"
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namespace mozilla {
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class MemoryReportingProcess;
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class RDDChild;
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// The RDDProcessManager is a singleton responsible for creating RDD-bound
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// objects that may live in another process. Currently, it provides access
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// to the RDD process via ContentParent.
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class RDDProcessManager final : public RDDProcessHost::Listener {
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friend class RDDChild;
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public:
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static void Initialize();
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static void Shutdown();
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static RDDProcessManager* Get();
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~RDDProcessManager();
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using EnsureRDDPromise =
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MozPromise<ipc::Endpoint<PRemoteDecoderManagerChild>, nsresult, true>;
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// Launch a new RDD process asynchronously
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RefPtr<GenericNonExclusivePromise> LaunchRDDProcess();
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// If not using a RDD process, launch a new RDD process asynchronously and
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// create a RemoteDecoderManager bridge
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RefPtr<EnsureRDDPromise> EnsureRDDProcessAndCreateBridge(
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base::ProcessId aOtherProcess);
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void OnProcessUnexpectedShutdown(RDDProcessHost* aHost) override;
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// Notify the RDDProcessManager that a top-level PRDD protocol has been
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// terminated. This may be called from any thread.
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void NotifyRemoteActorDestroyed(const uint64_t& aProcessToken);
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// Returns -1 if there is no RDD process, or the platform pid for it.
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base::ProcessId RDDProcessPid();
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// If a RDD process is present, create a MemoryReportingProcess object.
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// Otherwise, return null.
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RefPtr<MemoryReportingProcess> GetProcessMemoryReporter();
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// Returns access to the PRDD protocol if a RDD process is present.
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RDDChild* GetRDDChild() { return mRDDChild; }
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// Returns whether or not a RDD process was ever launched.
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bool AttemptedRDDProcess() const { return mNumProcessAttempts > 0; }
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// Returns the RDD Process
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RDDProcessHost* Process() { return mProcess; }
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/*
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* ** Test-only Method **
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*
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* Trigger RDD-process test metric instrumentation.
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*/
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RefPtr<PRDDChild::TestTriggerMetricsPromise> TestTriggerMetrics();
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private:
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bool IsRDDProcessLaunching();
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bool IsRDDProcessDestroyed() const;
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bool CreateVideoBridge();
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// Called from our xpcom-shutdown observer.
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void OnXPCOMShutdown();
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void OnPreferenceChange(const char16_t* aData);
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RDDProcessManager();
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// Shutdown the RDD process.
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void CleanShutdown();
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void DestroyProcess();
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bool IsShutdown() const;
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DISALLOW_COPY_AND_ASSIGN(RDDProcessManager);
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class Observer final : public nsIObserver {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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explicit Observer(RDDProcessManager* aManager);
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protected:
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~Observer() = default;
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RDDProcessManager* mManager;
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};
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friend class Observer;
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bool CreateContentBridge(
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base::ProcessId aOtherProcess,
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ipc::Endpoint<PRemoteDecoderManagerChild>* aOutRemoteDecoderManager);
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const RefPtr<Observer> mObserver;
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ipc::TaskFactory<RDDProcessManager> mTaskFactory;
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uint32_t mNumProcessAttempts = 0;
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uint32_t mNumUnexpectedCrashes = 0;
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// Fields that are associated with the current RDD process.
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RDDProcessHost* mProcess = nullptr;
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uint64_t mProcessToken = 0;
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RDDChild* mRDDChild = nullptr;
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// Collects any pref changes that occur during process launch (after
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// the initial map is passed in command-line arguments) to be sent
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// when the process can receive IPC messages.
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nsTArray<dom::Pref> mQueuedPrefs;
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// Promise will be resolved when the RDD process has been fully started and
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// VideoBridge configured. Only accessed on the main thread.
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RefPtr<GenericNonExclusivePromise> mLaunchRDDPromise;
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};
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} // namespace mozilla
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#endif // _include_dom_media_ipc_RDDProcessManager_h_
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