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/* The maximum number of ticks before the tick count rolls over. We use
* 0xFFFFFFFF instead of 0x100000000 to avoid 64-bit math.
*/
#define MAX_TICKS 0xFFFFFFFFL
#define TICKS_PER_SEC (1000000L / Clock_tickPeriod)
/* integral number of seconds in a period of MAX_TICKS */
#define MAX_SECONDS (MAX_TICKS / TICKS_PER_SEC)
unsigned sleep(unsigned seconds)
{
unsigned long secs, ticks; /* at least 32-bit */
unsigned max_secs, rval; /* native size, might be 16-bit */
max_secs = MAX_SECONDS;
if (seconds < max_secs) {
secs = seconds;
rval = 0;
}
else {
secs = max_secs;
rval = seconds - max_secs;
}
/* must use 64-bit math to compute tick value */
ticks = ((uint64_t)secs * 1000000L) / (uint64_t)Clock_tickPeriod;
/* must add one tick to ensure a full duration of requested ticks */
Task_sleep((UInt32)(ticks + 1));
return (rval);
}
