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// Timer.cc for Blackbox - An X11 Window Manager
// Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//use GNU extensions
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif // _GNU_SOURCE
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif // HAVE_CONFIG_H
#include "Timer.hh"
#include <sys/types.h>
#include <unistd.h>
#include <cassert>
//static var
BTimer::TimerList BTimer::m_timerlist;
BTimer::BTimer(TimeoutHandler *h):
m_handler(h),
m_timing(false),
m_once(false) {
}
BTimer::~BTimer(void) {
if (isTiming()) stop();
}
void BTimer::setTimeout(long t) {
m_timeout.tv_sec = t / 1000;
m_timeout.tv_usec = t;
m_timeout.tv_usec -= (m_timeout.tv_sec * 1000);
m_timeout.tv_usec *= 1000;
}
void BTimer::setTimeout(timeval t) {
m_timeout.tv_sec = t.tv_sec;
m_timeout.tv_usec = t.tv_usec;
}
void BTimer::start(void) {
gettimeofday(&m_start, 0);
if (! m_timing) {
m_timing = true;
addTimer(this); //add us to the list
}
}
void BTimer::stop(void) {
m_timing = false;
removeTimer(this); //remove us from the list
}
void BTimer::fireTimeout(void) {
if (m_handler) m_handler->timeout();
}
void BTimer::updateTimers(int fd) {
fd_set rfds;
timeval now, tm, *timeout = 0;
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
if (m_timerlist.size() > 0) {
gettimeofday(&now, 0);
tm.tv_sec = tm.tv_usec = 0l;
BTimer *timer = m_timerlist.front();
tm.tv_sec = timer->getStartTime().tv_sec +
timer->getTimeout().tv_sec - now.tv_sec;
tm.tv_usec = timer->getStartTime().tv_usec +
timer->getTimeout().tv_usec - now.tv_usec;
while (tm.tv_usec >= 1000000) {
tm.tv_sec++;
tm.tv_usec -= 1000000;
}
while (tm.tv_usec < 0) {
if (tm.tv_sec > 0) {
tm.tv_sec--;
tm.tv_usec += 1000000;
} else {
tm.tv_usec = 0;
break;
}
}
timeout = &tm;
}
select(fd + 1, &rfds, 0, 0, timeout);
// check for timer timeout
gettimeofday(&now, 0);
TimerList::iterator it = m_timerlist.begin();
//must check end ...the timer might remove
//it self from the list (should be fixed in the future)
for(; it != m_timerlist.end(); ++it) {
//This is to make sure we don't get an invalid iterator
//when we do fireTimeout
BTimer &t = *(*it);
tm.tv_sec = t.getStartTime().tv_sec +
t.getTimeout().tv_sec;
tm.tv_usec = t.getStartTime().tv_usec +
t.getTimeout().tv_usec;
if ((now.tv_sec < tm.tv_sec) ||
(now.tv_sec == tm.tv_sec && now.tv_usec < tm.tv_usec))
break;
t.fireTimeout();
// restart the current timer so that the start time is updated
if (! t.doOnce())
t.start();
else {
t.stop();
it--;
}
}
}
void BTimer::addTimer(BTimer *timer) {
assert(timer);
TimerList::iterator it = m_timerlist.begin();
TimerList::iterator it_end = m_timerlist.end();
int index = 0;
for (; it != it_end; ++it, ++index) {
if (((*it)->getTimeout().tv_sec > timer->getTimeout().tv_sec) ||
(((*it)->getTimeout().tv_sec == timer->getTimeout().tv_sec) &&
((*it)->getTimeout().tv_usec >= timer->getTimeout().tv_usec))) {
break;
}
}
m_timerlist.insert(it, timer);
}
void BTimer::removeTimer(BTimer *timer) {
assert(timer);
m_timerlist.remove(timer);
}
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