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cleaned up and clarified behavior of the timer device and how to properly clean it up

This commit is contained in:
Wei-ju Wu 2013-02-27 19:36:20 -08:00
parent b3fd30c95b
commit 35185e979a
1 changed files with 25 additions and 11 deletions
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36
devices/timer.c
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@ -17,8 +17,6 @@ int main(int argc, char **argv)
{
struct MsgPort *timer_port = NULL;
struct timerequest *timer_io = NULL;
struct timeval time1;
ULONG mics, secs;
BYTE error = 0;
timer_port = CreatePort(NULL, 0);
@ -33,24 +31,40 @@ int main(int argc, char **argv)
DeletePort(timer_port);
return 0;
}
error = OpenDevice(TIMERNAME, UNIT_MICROHZ, (struct IORequest *) timer_io, 0);
error = OpenDevice(TIMERNAME, UNIT_MICROHZ,
(struct IORequest *) timer_io, 0);
if (error) {
printf("could not open timer.device\n");
} else {
ULONG secs, mins, hours, days;
TimerBase = (struct Library *) timer_io->tr_node.io_Device;
timer_io->tr_node.io_Command = TR_GETSYSTIME;
DoIO((struct IORequest *) timer_io);
mics = timer_io->tr_time.tv_micro;
secs = timer_io->tr_time.tv_secs;
printf("micros: %lu secs: %lu\n", mics, secs);
mins = secs / 60;
hours = mins / 60;
days = hours / 24;
secs %= 60;
mins %= 60;
hours %= 24;
printf("%lu days, %02lu:%02lu:%02lu\n",
days, hours, mins, secs);
/*
* clean close of device, note that this sequence will
* either crash or hang indefinitely if no DoIO() was
* sent to the device
*/
if (!CheckIO((struct IORequest *) timer_io)) {
AbortIO((struct IORequest *) timer_io);
}
WaitIO((struct IORequest *) timer_io);
TimerBase = NULL;
}
/* cleanup */
if (!CheckIO((struct IORequest *) timer_io)) {
AbortIO((struct IORequest *) timer_io);
}
WaitIO((struct IORequest *) timer_io);
TimerBase = NULL;
CloseDevice((struct IORequest *) timer_io);
if (timer_io) DeleteExtIO((struct IORequest *) timer_io);
if (timer_port) DeletePort(timer_port);