testing/dispatch_timer_set_time.c

   1 #include <sys/time.h>
   2 #include <assert.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <sys/time.h>
   6
   7 #include <dispatch/dispatch.h>
   8
   9 #include "dispatch_test.h"
  10
  11 int main(void)
  12 {
  13         test_start("Dispatch Update Timer");
  14
  15         dispatch_queue_t main_q = dispatch_get_main_queue();
  16         test_ptr("dispatch_get_main_queue", main_q, dispatch_get_current_queue());
  17
  18         __block int i = 0;
  19         struct timeval start_time;
  20
  21         gettimeofday(&start_time, NULL);
  22         dispatch_source_attr_t attr = dispatch_source_attr_create();
  23         dispatch_source_attr_set_finalizer(attr, ^(dispatch_source_t ds) {
  24                 struct timeval end_time;
  25                 gettimeofday(&end_time, NULL);
  26                 // Make sure we actually managed to adjust the interval
  27                 // duration.  Seven one second ticks would blow past
  28                 // this.
  29                 test_long_less_than("total duration", end_time.tv_sec - start_time.tv_sec, 3);
  30                 test_ptr_notnull("finalizer ran", ds);
  31                 test_stop();
  32         });
  33
  34         dispatch_source_t s = dispatch_source_timer_create(DISPATCH_TIMER_INTERVAL,
  35                 1000000000ull,
  36                 0,
  37                 attr,
  38                 main_q,
  39                 ^(dispatch_event_t ev) {
  40                         long err;
  41                         if (dispatch_event_get_error(ev, &err)) {
  42                                 test_errno("dispatch_event_get_error", err, ECANCELED);
  43                                 dispatch_release(dispatch_event_get_source(ev));
  44                         } else {
  45                                 fprintf(stderr, "%d\n", ++i);
  46                                 if (i >= 7) {
  47                                         dispatch_cancel(dispatch_event_get_source(ev));
  48                                 } else if (i == 1) {
  49                                         dispatch_source_timer_set_time(dispatch_event_get_source(ev), 100, 0);
  50                                 }
  51                         }
  52                 });
  53         test_ptr_notnull("dispatch_source_timer_create", s);
  54
  55         dispatch_release(attr);
  56
  57         dispatch_main();
  58
  59         return 0;
  60 }