--- /dev/null
+#include <stdlib.h>
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <dispatch/dispatch.h>
+
+#include "dispatch_test.h"
+
+int main(void)
+{
+ test_start("Dispatch Source Timer");
+
+ dispatch_queue_t main_q = dispatch_get_main_queue();
+ test_ptr("dispatch_get_main_queue", main_q, dispatch_get_current_queue());
+
+ uint64_t j;
+
+ // create several timers and release them.
+ for (j = 1; j <= 5; ++j)
+ {
+ dispatch_source_t s = dispatch_source_timer_create(DISPATCH_TIMER_INTERVAL,
+ (uint64_t)j * (uint64_t)1000000000ull, 0, NULL, dispatch_get_concurrent_queue(0),
+ ^(dispatch_event_t ev) {
+ if (!dispatch_event_get_error(ev, NULL)) {
+ fprintf(stderr, "timer[%lld]\n", j);
+ dispatch_release(dispatch_event_get_source(ev));
+ }
+ });
+ test_ptr_notnull("dispatch_source_timer_create", s);
+ }
+
+ dispatch_source_attr_t attr = dispatch_source_attr_create();
+ dispatch_source_attr_set_finalizer(attr, ^(dispatch_source_t ds) {
+ test_ptr_notnull("finalizer ran", ds);
+ test_stop();
+ });
+
+ __block int i = 0;
+
+ dispatch_source_t s = dispatch_source_timer_create(DISPATCH_TIMER_INTERVAL,
+ 1000000000ull,
+ 0,
+ attr,
+ main_q,
+ ^(dispatch_event_t ev) {
+ long err;
+ if (dispatch_event_get_error(ev, &err)) {
+ test_errno("dispatch_event_get_error", err, ECANCELED);
+ dispatch_release(dispatch_event_get_source(ev));
+ } else {
+ fprintf(stderr, "%d\n", ++i);
+ if (i >= 3) {
+ dispatch_cancel(dispatch_event_get_source(ev));
+ }
+ }
+ });
+ test_ptr_notnull("dispatch_source_timer_create", s);
+
+ dispatch_release(attr);
+
+ dispatch_main();
+
+ return 0;
+}