regress/lib/libc/randomid/idtest.c

   1 /* $NetBSD: idtest.c,v 1.4 2003/12/10 05:22:18 itojun Exp $ */
   2
   3 /* If defined, abort at first short period and only test REGRESS times. */
   4 #define REGRESS         10000000                /* should be enough... */
   5
   6 #include <sys/types.h>
   7
   8 #include <assert.h>
   9 #include <randomid.h>
  10 #include <inttypes.h>
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <stdlib.h>
  14
  15 #define PERIOD          30000
  16
  17 uint64_t last[65536];
  18
  19 uint64_t n = 0;
  20
  21 main()
  22 {
  23         static randomid_t ctx = NULL;
  24         uint64_t lowest;
  25         uint16_t id;
  26         int i;
  27
  28         memset(last, 0, sizeof(last));
  29         ctx = randomid_new(16, (long)3600);
  30
  31         lowest = UINT64_MAX;
  32         while (n < UINT64_MAX) {
  33                 id = randomid(ctx);
  34                 if (last[id] > 0) {
  35                         if (n - last[id] <= lowest) {
  36                                 if (lowest != UINT64_MAX) {
  37                                         printf("id %5d  "
  38                                             "last call for id at %9lld, "
  39                                             "current call %9lld (diff %5lld)\n",
  40                                             id, last[id], n, n - last[id]);
  41 #ifdef REGRESS
  42                                         if (n - last[id] < PERIOD) {
  43                                                 printf("diff (%"PRIu64") less "
  44                                                     "than minimum period "
  45                                                     "(%d)\n", n - last[id],
  46                                                     PERIOD);
  47                                                 abort();
  48                                         }
  49 #endif
  50                                 }
  51                                 lowest = n - last[id];
  52                         }
  53                 }
  54                 last[id] = n;
  55                 n++;
  56 #ifdef REGRESS
  57                 if (n > REGRESS)
  58                         break;
  59 #endif
  60         }
  61         exit(0);
  62 }