/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

 * vim: set ts=4 sw=4 et 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/. */

#include "jsfriendapi.h"

#include "nsContentUtils.h"

#include "CPOWTimer.h"

#include "jsapi.h"

CPOWTimer::CPOWTimer(JSContext* cx MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)

    : cx_(nullptr)

    , startInterval_(0)

{

    MOZ_GUARD_OBJECT_NOTIFIER_INIT;

    if (!js::GetStopwatchIsMonitoringCPOW(cx)) {

        return;

    }

    cx_ = cx;

    startInterval_ = JS_Now();

}

CPOWTimer::~CPOWTimer()

{

    if (!cx_) {

        // Monitoring was off when we started the timer.

        return;

    }

    if (!js::GetStopwatchIsMonitoringCPOW(cx_)) {

        // Monitoring has been deactivated while we were in the timer.

        return;

    }

    const int64_t endInterval = JS_Now();

    if (endInterval <= startInterval_) {

        // Do not assume monotonicity.

        return;

    }

    js::AddCPOWPerformanceDelta(cx_, endInterval - startInterval_);

}