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21 #include "config/config.h"
28 #include <dispatch/dispatch.h>
30 #include "dispatch_test.h"
33 // There were several bugs related to sign extension / integer overflow that
34 // were encountered during development. Create a timer whose interval has the
35 // 31st bit of the word set to verify that it behaves correctly.
37 // 2 s < 0x80000000ull ns < 4 s
43 test_start("Dispatch Source Timer, bit 31");
45 dispatch_queue_t main_q = dispatch_get_main_queue();
46 test_ptr("dispatch_get_main_queue", main_q, dispatch_get_current_queue());
48 dispatch_source_t timer;
49 struct timeval start_time;
51 gettimeofday(&start_time, NULL);
53 timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, main_q);
54 test_ptr_notnull("DISPATCH_SOURCE_TYPE_TIMER", timer);
56 dispatch_source_set_timer(timer, dispatch_time(DISPATCH_TIME_NOW, 0x80000000ull), 0, 0);
58 dispatch_source_set_event_handler(timer, ^{
59 dispatch_source_cancel(timer);
62 dispatch_source_set_cancel_handler(timer, ^{
63 struct timeval end_time;
64 gettimeofday(&end_time, NULL);
66 test_long_less_than("elapsed time < 4s", end_time.tv_sec - start_time.tv_sec, 4);
67 test_long_less_than("elapsed time > 2s", 1, end_time.tv_sec - start_time.tv_sec);
71 dispatch_resume(timer);