1 //@ignore-target-windows: No libc on Windows
2 //@ignore-target-apple: pthread_condattr_setclock is not supported on MacOS.
4 /// Test that conditional variable timeouts are working properly
5 /// with monotonic clocks even under isolation.
6 use std::mem::MaybeUninit;
7 use std::time::Instant;
9 fn test_timed_wait_timeout(clock_id: i32) {
11 let mut attr: MaybeUninit<libc::pthread_condattr_t> = MaybeUninit::uninit();
12 assert_eq!(libc::pthread_condattr_init(attr.as_mut_ptr()), 0);
13 assert_eq!(libc::pthread_condattr_setclock(attr.as_mut_ptr(), clock_id), 0);
15 let mut cond: MaybeUninit<libc::pthread_cond_t> = MaybeUninit::uninit();
16 assert_eq!(libc::pthread_cond_init(cond.as_mut_ptr(), attr.as_ptr()), 0);
17 assert_eq!(libc::pthread_condattr_destroy(attr.as_mut_ptr()), 0);
19 let mut mutex: libc::pthread_mutex_t = libc::PTHREAD_MUTEX_INITIALIZER;
21 let mut now_mu: MaybeUninit<libc::timespec> = MaybeUninit::uninit();
22 assert_eq!(libc::clock_gettime(clock_id, now_mu.as_mut_ptr()), 0);
23 let now = now_mu.assume_init();
24 // Waiting for a second... mostly because waiting less requires mich more tricky arithmetic.
26 let timeout = libc::timespec { tv_sec: now.tv_sec + 1, tv_nsec: now.tv_nsec };
28 assert_eq!(libc::pthread_mutex_lock(&mut mutex as *mut _), 0);
29 let current_time = Instant::now();
31 libc::pthread_cond_timedwait(cond.as_mut_ptr(), &mut mutex as *mut _, &timeout),
34 let elapsed_time = current_time.elapsed().as_millis();
35 assert!(900 <= elapsed_time && elapsed_time <= 1300);
37 // Test calling `pthread_cond_timedwait` again with an already elapsed timeout.
39 libc::pthread_cond_timedwait(cond.as_mut_ptr(), &mut mutex as *mut _, &timeout),
43 // Test that invalid nanosecond values (above 10^9 or negative) are rejected with the
44 // correct error code.
45 let invalid_timeout_1 = libc::timespec { tv_sec: now.tv_sec + 1, tv_nsec: 1_000_000_000 };
47 libc::pthread_cond_timedwait(
54 let invalid_timeout_2 = libc::timespec { tv_sec: now.tv_sec + 1, tv_nsec: -1 };
56 libc::pthread_cond_timedwait(
63 // Test that invalid second values (negative) are rejected with the correct error code.
64 let invalid_timeout_3 = libc::timespec { tv_sec: -1, tv_nsec: 0 };
66 libc::pthread_cond_timedwait(
74 assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
75 assert_eq!(libc::pthread_mutex_destroy(&mut mutex as *mut _), 0);
76 assert_eq!(libc::pthread_cond_destroy(cond.as_mut_ptr()), 0);
81 test_timed_wait_timeout(libc::CLOCK_MONOTONIC);