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// clockslave.c - clock synchronization test/demo
////
// see clockmaster.c for details
#include "o2.h"
#include "stdio.h"
#include "string.h"
#ifdef WIN32
#include "usleep.h" // special windows implementation of sleep/usleep
#else
#include <unistd.h>
#endif
o2_time cs_time = 1000000.0;
void clockslave(o2_msg_data_ptr msg, const char *types,
o2_arg ** argv, int argc, void *user_data)
{
int ss = o2_status("server");
int cs = o2_status("client");
double mean_rtt, min_rtt;
o2_roundtrip(&mean_rtt, &min_rtt);
printf("clockslave: local time %g global time %g "
"ss %d cs %d mean %g min %g\n",
o2_local_time(), o2_time_get(), ss, cs, mean_rtt, min_rtt);
if (ss == O2_REMOTE) {
if (o2_time_get() < cs_time) {
cs_time = o2_time_get();
printf("clockslave sync time %g\n", cs_time);
}
}
// stop 10s later
if (o2_time_get() > cs_time + 10) {
o2_stop_flag = TRUE;
printf("clockslave set stop flag TRUE at %g\n", o2_time_get());
}
// Since the clock slave cannot immediately send scheduled messages
// due to there being no global time reference, we will schedule
// messages directly on the local scheduler
o2_send_start();
o2_message_ptr m = o2_message_finish(o2_local_time() + 1,
"!client/clockslave", TRUE);
o2_schedule(&o2_ltsched, m);
}
int main(int argc, const char * argv[])
{
printf("Usage: clockslave [debugflags] "
"(see o2.h for flags, use a for all)\n");
if (argc == 2) {
o2_debug_flags(argv[1]);
printf("debug flags are: %s\n", argv[1]);
}
if (argc > 2) {
printf("WARNING: clockslave ignoring extra command line argments\n");
}
o2_initialize("test");
o2_service_new("client");
o2_method_new("/client/clockslave", "", &clockslave, NULL, FALSE, FALSE);
// this particular handler ignores all parameters, so this is OK:
// start polling and reporting status
clockslave(NULL, NULL, NULL, 0, NULL);
o2_run(100);
o2_finish();
sleep(1);
printf("CLOCKSLAVE DONE\n");
return 0;
}
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