CLK_RESOLUTION
*(int *)data = CLK_RESOLUTION;
#define COUNTS_PER_SEC (1000000 / CLK_RESOLUTION)
intvl = (10000 / CLK_RESOLUTION) - 1;
tick = intvl * CLK_RESOLUTION;
#define CLOCKS_PER_SEC (1000000 / CLK_RESOLUTION)
*(int *)data = CLK_RESOLUTION;