/* -*- 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 nsProfiler_h

#define nsProfiler_h

#include "nsIProfiler.h"

#include "nsIObserver.h"

#include "mozilla/Attributes.h"

#include "mozilla/Maybe.h"

#include "mozilla/MozPromise.h"

#include "mozilla/TimeStamp.h"

#include "nsServiceManagerUtils.h"

#include "ProfileJSONWriter.h"

class nsProfiler final : public nsIProfiler, public nsIObserver

{

public:

  nsProfiler();

  NS_DECL_ISUPPORTS

  NS_DECL_NSIOBSERVER

  NS_DECL_NSIPROFILER

  nsresult Init();

  static nsProfiler* GetOrCreate()

  {

    nsCOMPtr<nsIProfiler> iprofiler =

      do_GetService("@mozilla.org/tools/profiler;1");

    return static_cast<nsProfiler*>(iprofiler.get());

  }

  void GatheredOOPProfile(const nsACString& aProfile);

private:

  ~nsProfiler();

  typedef mozilla::MozPromise<nsCString, nsresult, false> GatheringPromise;

  RefPtr<GatheringPromise> StartGathering(double aSinceTime);

  void FinishGathering();

  void ResetGathering();

  void ClearExpiredExitProfiles();

  bool mLockedForPrivateBrowsing;

  struct ExitProfile {

    nsCString mJSON;

    uint64_t mBufferPositionAtGatherTime;

  };

  // These fields are all related to profile gathering.

  nsTArray<ExitProfile> mExitProfiles;

  mozilla::Maybe<mozilla::MozPromiseHolder<GatheringPromise>> mPromiseHolder;

  mozilla::Maybe<SpliceableChunkedJSONWriter> mWriter;

  uint32_t mPendingProfiles;

  bool mGathering;

};

#endif // nsProfiler_h