/** Detect suspend/resume cycle from CLOCK_MONOTONIC vs CLOCK_BOOTTIME
*/
static void io_detect_resume(void)
{
static int64_t prev = 0;
int64_t boot = mce_lib_get_boot_tick();
int64_t mono = mce_lib_get_mono_tick();
int64_t diff = boot - mono;
int64_t skip = diff - prev;
// small jitter can be due to scheduling too
if( skip < 100 )
goto EXIT;
prev = diff;
// no logging from the 1st time skip
if( prev == skip )
goto EXIT;
mce_log(LL_DEVEL, "time skip: assume %"PRId64".%03"PRId64"s suspend",
skip / 1000, skip % 1000);
// notify in case some timers need re-evaluating
execute_datapipe_output_triggers(&device_resumed_pipe,
&prev,
USE_INDATA);
EXIT:
return;
}
/** Get monotonic timestamp not affected by system time / timezone changes
*
* @return milliseconds since some reference point in time
*/
static
tick_t
cka_tick_get_current(void)
{
return mce_lib_get_boot_tick();
}
