Fix mktime localtime offset confusion

[thirdparty/glibc.git] / time / clocktest.c

diff --git a/time/clocktest.c b/time/clocktest.c
index 0a248aa18136e149cf8c719ecc223d121e8681ca..779c05d8d95a14fcb074ba8810fbf90b26cf1229 100644 (file)
--- a/time/clocktest.c
+++ b/time/clocktest.c
@@ -1,16 +1,37 @@
+#include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <time.h>
+#include <unistd.h>
+#include <stdint.h>
 
-main ()
+volatile int gotit = 0;
+
+static void
+alarm_handler (int signal)
+{
+    gotit = 1;
+}
+
+
+int
+main (int argc, char ** argv)
 {
-  volatile int i;
-  double t1, t2, t;
+  clock_t start, stop;
 
-  t1 = (double) clock ();
-  for (i = 0; i < 100000; ++i) ;
-  t2 = (double) clock ();
+  if (signal(SIGALRM, alarm_handler) == SIG_ERR)
+    {
+      perror ("signal");
+      exit (1);
+    }
+  alarm(1);
+  start = clock ();
+  while (!gotit);
+  stop = clock ();
 
-  t = (t2 - t1) / ((double) CLOCKS_PER_SEC);
-  printf ("%f - %f = %f\n",t2,t1,t);
+  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;
 }