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/* -*- c++ -*- */
/*
* Copyright 2005 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_GR_TIMER_H
#define INCLUDED_GR_TIMER_H
#include <gr_types.h>
class gr_timer;
typedef boost::shared_ptr<gr_timer> gr_timer_sptr;
typedef void (*gr_timer_hook)(gr_timer *, void *);
/*!
* \brief create a timeout.
*
* gr_timer_hook is called when timer fires.
*/
gr_timer_sptr gr_make_timer (gr_timer_hook, void *);
/*!
* \brief implement timeouts
*/
class gr_timer {
double d_expiry;
double d_period;
gr_timer_hook d_hook;
void *d_hook_arg;
friend gr_timer_sptr gr_make_timer (gr_timer_hook, void *);
gr_timer (...);
public:
~gr_timer ();
//! return absolute current time (seconds since the epoc).
static double now ();
/*!
* \brief schedule timer to fire at abs_when
* \param abs_when absolute time in seconds since the epoc.
*/
void schedule_at (double abs_when);
/*!
* \brief schedule timer to fire rel_when seconds from now.
* \param rel_when relative time in seconds from now.
*/
void schedule_after (double rel_when); // relative time in seconds
/*!
* \brief schedule a periodic timeout.
* \param abs_when absolute time to fire first time
* \param period time between firings
*/
void schedule_periodic (double abs_when, double period);
//! cancel timer
void unschedule ();
};
#endif /* INCLUDED_GR_TIMER_H */
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