CLK_TCK
if (CLK_TCK != 100) /* convert to 1/100'ths */
t = (t < (clock_t)(1000000000/CLK_TCK)) ?
(t * 100) / CLK_TCK : (t / CLK_TCK) * 100;
clk_tck = (clock_t)CLK_TCK;
#define MIN_ROUND ((1000-1)/CLK_TCK)
next_time = this_time + CLK_TCK;
prthp((clock_t)CLK_TCK);
prthp((clock_t)CLK_TCK);
prthp((clock_t)CLK_TCK);
prthp((clock_t)CLK_TCK);
prthp((clock_t)CLK_TCK);
&& rwait.tv_usec < 1000000/CLK_TCK)
rwait.tv_usec = 1000000/CLK_TCK;
# define NG_DELAY (30*60*CLK_TCK) /* 30 minutes */