impl::ns_time
impl::current_time_in_ns(void)
{
ns_time ns(0);
#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_REALTIME)
{
struct timespec tp;
clock_gettime(CLOCK_REALTIME, &tp);
ns = sec_to_ns(tp.tv_sec) + ns_time(tp.tv_nsec);
}
#else
{
struct timeval tv;
(void)gettimeofday(&tv, NULL);
ns = sec_to_ns(tv.tv_sec) + usec_to_ns(tv.tv_usec);
}
#endif
return ns;
}
static void
test_file_io(void)
{
long long start_time, end_time;
FILE *fp;
unsigned char buf[256];
int len, n, fd;
start_time = ns_time();
len = 0;
if ((fp = fopen("/redhat.logo", "r")) != (FILE *)NULL) {
while (fgets(buf, sizeof(buf), fp)) {
len += strlen(buf);
}
fclose(fp);
}
end_time = ns_time();
diag_printf("'fgets': %d bytes in ", len); show_ns(end_time-start_time); diag_printf("ns\n");
start_time = ns_time();
len = 0;
if ((fp = fopen("/redhat.logo", "r")) != (FILE *)NULL) {
while ((n = fread(buf, 1, sizeof(buf), fp))) {
len += n;
}
fclose(fp);
}
end_time = ns_time();
diag_printf("'fread': %d bytes in ", len); show_ns(end_time-start_time); diag_printf("ns\n");
start_time = ns_time();
len = 0;
if ((fd = open("/redhat.logo", O_RDONLY)) >= 0) {
while ((n = read(fd, buf, sizeof(buf)))) {
len += n;
}
close(fd);
}
end_time = ns_time();
diag_printf("'read': %d bytes in ", len); show_ns(end_time-start_time); diag_printf("ns\n");
}
time_t
impl::nsec_to_sec(const ns_time &nsec)
{
return (nsec / ns_time(1000000000)).get();
}