/* -*- 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 nsMemoryImpl_h__

#define nsMemoryImpl_h__

#include "mozilla/Atomics.h"

#include "nsIMemory.h"

#include "nsIRunnable.h"

// nsMemoryImpl is a static object. We can do this because it doesn't have

// a constructor/destructor or any instance members. Please don't add

// instance member variables, only static member variables.

class nsMemoryImpl : public nsIMemory

{

public:

  // We don't use the generic macros because we are a special static object

  NS_IMETHOD QueryInterface(REFNSIID aIID, void** aResult) override;

  NS_IMETHOD_(MozExternalRefCountType) AddRef(void) override

  {

    return 1;

  }

  NS_IMETHOD_(MozExternalRefCountType) Release(void) override

  {

    return 1;

  }

  NS_DECL_NSIMEMORY

  static nsresult Create(nsISupports* aOuter,

                         const nsIID& aIID, void** aResult);

  nsresult FlushMemory(const char16_t* aReason, bool aImmediate);

  nsresult RunFlushers(const char16_t* aReason);

protected:

  struct FlushEvent : public nsIRunnable

  {

    constexpr FlushEvent() : mReason(nullptr) {}

    NS_DECL_ISUPPORTS_INHERITED

    NS_DECL_NSIRUNNABLE

    const char16_t* mReason;

  };

  static mozilla::Atomic<bool> sIsFlushing;

  static FlushEvent sFlushEvent;

  static PRIntervalTime sLastFlushTime;

};

#endif // nsMemoryImpl_h__