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