diff options
Diffstat (limited to 'REORG.TODO/time/clocktest.c')
-rw-r--r-- | REORG.TODO/time/clocktest.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/REORG.TODO/time/clocktest.c b/REORG.TODO/time/clocktest.c new file mode 100644 index 0000000000..779c05d8d9 --- /dev/null +++ b/REORG.TODO/time/clocktest.c @@ -0,0 +1,37 @@ +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#include <unistd.h> +#include <stdint.h> + +volatile int gotit = 0; + +static void +alarm_handler (int signal) +{ + gotit = 1; +} + + +int +main (int argc, char ** argv) +{ + clock_t start, stop; + + if (signal(SIGALRM, alarm_handler) == SIG_ERR) + { + perror ("signal"); + exit (1); + } + alarm(1); + start = clock (); + while (!gotit); + stop = clock (); + + printf ("%jd clock ticks per second (start=%jd,stop=%jd)\n", + (intmax_t) (stop - start), (intmax_t) start, (intmax_t) stop); + printf ("CLOCKS_PER_SEC=%jd, sysconf(_SC_CLK_TCK)=%ld\n", + (intmax_t) CLOCKS_PER_SEC, sysconf(_SC_CLK_TCK)); + return 0; +} |