89 lines
3.4 KiB
Rust
89 lines
3.4 KiB
Rust
// ignore-windows: No libc on Windows
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// ignore-apple: pthread_condattr_setclock is not supported on MacOS.
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// compile-flags: -Zmiri-disable-isolation
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#![feature(rustc_private)]
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/// Test that conditional variable timeouts are working properly with both
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/// monotonic and system clocks.
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extern crate libc;
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use std::mem::MaybeUninit;
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use std::time::Instant;
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fn test_timed_wait_timeout(clock_id: i32) {
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unsafe {
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let mut attr: MaybeUninit<libc::pthread_condattr_t> = MaybeUninit::uninit();
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assert_eq!(libc::pthread_condattr_init(attr.as_mut_ptr()), 0);
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assert_eq!(libc::pthread_condattr_setclock(attr.as_mut_ptr(), clock_id), 0);
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let mut cond: MaybeUninit<libc::pthread_cond_t> = MaybeUninit::uninit();
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assert_eq!(libc::pthread_cond_init(cond.as_mut_ptr(), attr.as_ptr()), 0);
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assert_eq!(libc::pthread_condattr_destroy(attr.as_mut_ptr()), 0);
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let mut mutex: libc::pthread_mutex_t = libc::PTHREAD_MUTEX_INITIALIZER;
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let mut now_mu: MaybeUninit<libc::timespec> = MaybeUninit::uninit();
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assert_eq!(libc::clock_gettime(clock_id, now_mu.as_mut_ptr()), 0);
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let now = now_mu.assume_init();
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// Waiting for a second... mostly because waiting less requires mich more tricky arithmetic.
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// FIXME: wait less.
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let timeout = libc::timespec { tv_sec: now.tv_sec + 1, tv_nsec: now.tv_nsec };
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assert_eq!(libc::pthread_mutex_lock(&mut mutex as *mut _), 0);
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let current_time = Instant::now();
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assert_eq!(
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libc::pthread_cond_timedwait(cond.as_mut_ptr(), &mut mutex as *mut _, &timeout),
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libc::ETIMEDOUT
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);
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let elapsed_time = current_time.elapsed().as_millis();
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assert!(900 <= elapsed_time && elapsed_time <= 1300);
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// Test calling `pthread_cond_timedwait` again with an already elapsed timeout.
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assert_eq!(
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libc::pthread_cond_timedwait(cond.as_mut_ptr(), &mut mutex as *mut _, &timeout),
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libc::ETIMEDOUT
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);
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// Test that invalid nanosecond values (above 10^9 or negative) are rejected with the
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// correct error code.
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let invalid_timeout_1 = libc::timespec { tv_sec: now.tv_sec + 1, tv_nsec: 1_000_000_000 };
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assert_eq!(
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libc::pthread_cond_timedwait(
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cond.as_mut_ptr(),
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&mut mutex as *mut _,
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&invalid_timeout_1
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),
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libc::EINVAL
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);
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let invalid_timeout_2 = libc::timespec { tv_sec: now.tv_sec + 1, tv_nsec: -1 };
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assert_eq!(
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libc::pthread_cond_timedwait(
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cond.as_mut_ptr(),
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&mut mutex as *mut _,
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&invalid_timeout_2
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),
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libc::EINVAL
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);
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// Test that invalid second values (negative) are rejected with the correct error code.
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let invalid_timeout_3 = libc::timespec { tv_sec: -1, tv_nsec: 0 };
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assert_eq!(
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libc::pthread_cond_timedwait(
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cond.as_mut_ptr(),
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&mut mutex as *mut _,
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&invalid_timeout_3
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),
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libc::EINVAL
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);
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assert_eq!(libc::pthread_mutex_unlock(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_mutex_destroy(&mut mutex as *mut _), 0);
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assert_eq!(libc::pthread_cond_destroy(cond.as_mut_ptr()), 0);
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}
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}
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fn main() {
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test_timed_wait_timeout(libc::CLOCK_MONOTONIC);
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test_timed_wait_timeout(libc::CLOCK_REALTIME);
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}
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