Timer.cpp

/**
* Digital Voice Modem - Transcode Software
* GPLv2 Open Source. Use is subject to license terms.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* @package DVM / Transcode Software
*
*/
//
// Based on code from the MMDVMHost project. (https://github.com/g4klx/MMDVMHost)
// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
//
/*
*   Copyright (C) 2009,2010,2015 by Jonathan Naylor G4KLX
*   Copyright (C) 2017-2019 by Bryan Biedenkapp N2PLL
*
*   This program is free software; you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation; either version 2 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program; if not, write to the Free Software
*   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "Defines.h"
#include "Timer.h"

#include <cstdio>
#include <cassert>

// ---------------------------------------------------------------------------
//  Public Class Members
// ---------------------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the Timer class.
/// </summary>
Timer::Timer() :
    m_ticksPerSec(1000U),
    m_timeout(0U),
    m_timer(0U),
    m_paused(false)
{
    /* stub */
}

/// <summary>
/// Initializes a new instance of the Timer class.
/// </summary>
/// <param name="ticksPerSec"></param>
/// <param name="secs"></param>
/// <param name="msecs"></param>
Timer::Timer(uint32_t ticksPerSec, uint32_t secs, uint32_t msecs) :
    m_ticksPerSec(ticksPerSec),
    m_timeout(0U),
    m_timer(0U),
    m_paused(false)
{
    assert(ticksPerSec > 0U);

    if (secs > 0U || msecs > 0U) {
        // m_timeout = ((secs * 1000U + msecs) * m_ticksPerSec) / 1000U + 1U;
        ulong64_t temp = (secs * 1000ULL + msecs) * m_ticksPerSec;
        m_timeout = (uint32_t)(temp / 1000ULL + 1ULL);
    }
}

/// <summary>
/// Finalizes a instance of the Timer class.
/// </summary>
Timer::~Timer()
{
    /* stub */
}

/// <summary>
/// Sets the timeout for the timer.
/// </summary>
/// <param name="secs"></param>
/// <param name="msecs"></param>
void Timer::setTimeout(uint32_t secs, uint32_t msecs)
{
    if (secs > 0U || msecs > 0U) {
        // m_timeout = ((secs * 1000U + msecs) * m_ticksPerSec) / 1000U + 1U;
        ulong64_t temp = (secs * 1000ULL + msecs) * m_ticksPerSec;
        m_timeout = (uint32_t)(temp / 1000ULL + 1ULL);
    }
    else {
        m_timeout = 0U;
        m_timer = 0U;
    }
}

/// <summary>
/// Gets the timeout for the timer.
/// </summary>
/// <returns></returns>
uint32_t Timer::getTimeout() const
{
    if (m_timeout == 0U)
        return 0U;

    return (m_timeout - 1U) / m_ticksPerSec;
}

/// <summary>
/// Gets the current time for the timer.
/// </summary>
/// <returns></returns>
uint32_t Timer::getTimer() const
{
    if (m_timer == 0U)
        return 0U;

    return (m_timer - 1U) / m_ticksPerSec;
}