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// posixTimer.cpp
// Context Free
// ---------------------
// Copyright (C) 2008-2014 John Horigan
//
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// John Horigan can be contacted at john@glyphic.com or at
// John Horigan, 1209 Villa St., Mountain View, CA 94041-1123, USA
//
//
#include "cfdg.h"
#include <sys/time.h>
#include <signal.h>
#include <memory>
static std::weak_ptr<Renderer> gRenderer;
void
statusTimer(int)
{
if (auto runningRenderer = gRenderer.lock())
runningRenderer->requestUpdate = true;
}
void
setupTimer(std::shared_ptr<Renderer>& renderer)
{
gRenderer = renderer;
struct sigaction doit;
doit.sa_handler = statusTimer;
sigemptyset(&doit.sa_mask);
doit.sa_flags = SA_RESTART;
sigaction(SIGALRM, &doit, 0);
itimerval period;
period.it_interval.tv_sec = 0;
period.it_interval.tv_usec = 250000; // 1/4 second
period.it_value = period.it_interval;
setitimer(ITIMER_REAL, &period, 0);
}
void
cleanupTimer()
{
itimerval period;
period.it_interval.tv_sec = 0;
period.it_interval.tv_usec = 0;
period.it_value = period.it_interval;
setitimer(ITIMER_REAL, &period, 0);
}
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