1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
9 #ifdef HAVE_SYS_SELECT_H
10 # include <sys/select.h>
11 #endif // HAVE_SYS_SELECT_H
13 #ifdef HAVE_SYS_TIME_H
14 # include <sys/time.h>
20 timeval Timer::_nearest_timeout, Timer::_now;
21 Timer::TimerQ Timer::_q;
23 void Timer::timevalAdd(timeval &a, long msec)
25 a.tv_sec += msec / 1000;
26 a.tv_usec += (msec % 1000) * 1000;
27 a.tv_sec += a.tv_usec / 1000000;
31 bool Timer::nearestTimeout(struct timeval &tm)
35 tm.tv_sec = _nearest_timeout.tv_sec - _now.tv_sec;
36 tm.tv_usec = _nearest_timeout.tv_usec - _now.tv_usec;
38 while (tm.tv_usec < 0) {
39 tm.tv_usec += 1000000;
42 tm.tv_sec += tm.tv_usec / 1000000;
43 tm.tv_usec %= 1000000;
50 void Timer::dispatchTimers(bool wait)
57 gettimeofday(&_now, NULL);
58 _nearest_timeout = _now;
59 _nearest_timeout.tv_sec += 10000;
63 /* since we overload the destructor to keep from removing from the middle
64 of the priority queue, set _del_me, we have to do our real delete in
73 // the queue is sorted, so if this timer shouldn't fire, none are ready
74 _nearest_timeout = curr->_timeout;
75 if (!timercmp(&_now, &_nearest_timeout, >))
78 /* we set the last fired time to delay msec after the previous firing, then
79 re-insert. timers maintain their order and may trigger more than once
80 if they've waited more than one delay's worth of time.
83 timevalAdd(curr->_last, curr->_delay);
84 curr->_action(curr->_data);
85 timevalAdd(curr->_timeout, curr->_delay);
88 /* if at least one timer fires, then don't wait on X events, as there may
89 already be some in the queue from the timer callbacks.
95 // wait for the nearest trigger, or for X to do something interesting
96 fd = ConnectionNumber(**display);
99 if (nearestTimeout(next)) {
100 select(fd + 1, &selset, NULL, NULL, &next);
102 select(fd + 1, &selset, NULL, NULL, NULL);
106 Timer::Timer(long delay, Timer::TimeoutHandler action, void *data)
114 timevalAdd(_timeout, delay);
118 void Timer::operator delete(void *self)
125 void Timer::realDelete(Timer *me)
130 void Timer::initialize(void)
132 gettimeofday(&_now, NULL);
133 _nearest_timeout.tv_sec = 100000;
134 _nearest_timeout.tv_usec = 0;
137 void Timer::destroy(void)
140 realDelete(_q.top());