| 1 | // RUN: %clang_tsan %s -o %t |
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| 2 | // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer' |
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| 3 | |
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| 4 | #include <dispatch/dispatch.h> |
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| 5 | |
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| 6 | #include <stdio.h> |
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| 7 | |
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| 8 | long global; |
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| 9 | |
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| 10 | int main(int argc, const char *argv[]) { |
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| 11 | fprintf(stderr, format: "Hello world.\n" ); |
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| 12 | |
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| 13 | dispatch_queue_t q = dispatch_queue_create("my.queue" , DISPATCH_QUEUE_SERIAL); |
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| 14 | dispatch_source_t timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, q); |
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| 15 | long long interval_ms = 10; |
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| 16 | dispatch_source_set_timer(timer, dispatch_time(DISPATCH_TIME_NOW, 0), interval_ms * NSEC_PER_MSEC, 0); |
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| 17 | |
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| 18 | dispatch_semaphore_t sem = dispatch_semaphore_create(0); |
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| 19 | dispatch_source_set_event_handler(timer, ^{ |
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| 20 | fprintf(stderr, format: "timer\n" ); |
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| 21 | global++; |
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| 22 | |
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| 23 | if (global > 50) { |
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| 24 | dispatch_semaphore_signal(sem); |
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| 25 | dispatch_suspend(timer); |
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| 26 | } |
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| 27 | }); |
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| 28 | dispatch_resume(timer); |
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| 29 | |
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| 30 | dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER); |
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| 31 | |
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| 32 | fprintf(stderr, format: "Done.\n" ); |
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| 33 | } |
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| 34 | |
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| 35 | // CHECK: Hello world. |
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| 36 | // CHECK: timer |
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| 37 | // CHECK: Done. |
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| 38 | // CHECK-NOT: timer |
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| 39 | |
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