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/*
* Copyright 2012 Serge van den Boom <svdb@stack.nl>
*
* 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
*/
#include "async.h"
#include "libs/alarm.h"
#include "libs/callback.h"
// Process all alarms and callbacks.
// First, all scheduled callbacks are called.
// Then each alarm due is called, and after each of these alarms, the
// callbacks scheduled by this alarm are called.
void
Async_process(void)
{
// Call pending callbacks.
Callback_process();
for (;;) {
if (!Alarm_processOne())
return;
// Call callbacks scheduled from the last alarm.
Callback_process();
}
}
// Returns the next time that some asynchronous callback is
// to be called. Note that all values lower than the current time
// should be considered as 'somewhere in the past'.
uint32
Async_timeBeforeNextMs(void) {
if (Callback_haveMore()) {
// Any time before the current time is ok, though we reserve 0 so
// that the caller may use it as a special value in its own code.
return 1;
}
return Alarm_timeBeforeNextMs();
}
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