8b8ae52134
Use log categories in the whole existing code base. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
110 lines
2.2 KiB
C++
110 lines
2.2 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
/*
|
|
* Copyright (C) 2019, Google Inc.
|
|
*
|
|
* timer.cpp - Generic timer
|
|
*/
|
|
|
|
#include <time.h>
|
|
|
|
#include <libcamera/camera_manager.h>
|
|
#include <libcamera/event_dispatcher.h>
|
|
#include <libcamera/timer.h>
|
|
|
|
#include "log.h"
|
|
|
|
/**
|
|
* \file timer.h
|
|
* \brief Generic timer
|
|
*/
|
|
|
|
namespace libcamera {
|
|
|
|
LOG_DEFINE_CATEGORY(Timer)
|
|
|
|
/**
|
|
* \class Timer
|
|
* \brief Single-shot timer interface
|
|
*
|
|
* The Timer class models a single-shot timer that is started with start() and
|
|
* emits the \ref timeout signal when it times out.
|
|
*
|
|
* Once started the timer will run until it times out. It can be stopped with
|
|
* stop(), and once it times out or is stopped, can be started again with
|
|
* start().
|
|
*/
|
|
|
|
/**
|
|
* \brief Construct a timer
|
|
*/
|
|
Timer::Timer()
|
|
: interval_(0), deadline_(0)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* \brief Start or restart the timer with a timeout of \a msec
|
|
* \param msec The timer duration in milliseconds
|
|
*
|
|
* If the timer is already running it will be stopped and restarted.
|
|
*/
|
|
void Timer::start(unsigned int msec)
|
|
{
|
|
struct timespec tp;
|
|
clock_gettime(CLOCK_MONOTONIC, &tp);
|
|
|
|
interval_ = msec;
|
|
deadline_ = tp.tv_sec * 1000000000ULL + tp.tv_nsec + msec * 1000000ULL;
|
|
|
|
LOG(Timer, Debug)
|
|
<< "Starting timer " << this << " with interval "
|
|
<< msec << ": deadline " << deadline_;
|
|
|
|
CameraManager::instance()->eventDispatcher()->registerTimer(this);
|
|
}
|
|
|
|
/**
|
|
* \brief Stop the timer
|
|
*
|
|
* After this function returns the timer is guaranteed not to emit the
|
|
* \ref timeout signal.
|
|
*
|
|
* If the timer is not running this function performs no operation.
|
|
*/
|
|
void Timer::stop()
|
|
{
|
|
CameraManager::instance()->eventDispatcher()->unregisterTimer(this);
|
|
|
|
deadline_ = 0;
|
|
}
|
|
|
|
/**
|
|
* \brief Check if the timer is running
|
|
* \return True if the timer is running, false otherwise
|
|
*/
|
|
bool Timer::isRunning() const
|
|
{
|
|
return deadline_ != 0;
|
|
}
|
|
|
|
/**
|
|
* \fn Timer::interval()
|
|
* \brief Retrieve the timer interval
|
|
* \return The timer interval in milliseconds
|
|
*/
|
|
|
|
/**
|
|
* \fn Timer::deadline()
|
|
* \brief Retrieve the timer deadline
|
|
* \return The timer deadline in nanoseconds
|
|
*/
|
|
|
|
/**
|
|
* \var Timer::timeout
|
|
* \brief Signal emitted when the timer times out
|
|
*
|
|
* The timer pointer is passed as a parameter.
|
|
*/
|
|
|
|
} /* namespace libcamera */
|