#![feature(rustc_private)]
-use std::sync;
+use std::sync::{Mutex, RwLock, TryLockError};
extern crate libc;
fn main() {
- let m = sync::Mutex::new(0);
+ let m = Mutex::new(0);
{
let _guard = m.lock();
- let try_lock_error = m.try_lock().unwrap_err();
- if let sync::TryLockError::Poisoned(e) = try_lock_error {
- panic!("{}", e);
- }
+ assert!(m.try_lock().unwrap_err().would_block());
}
drop(m.try_lock().unwrap());
drop(m);
#[cfg(not(target_os = "windows"))] // TODO: implement RwLock on Windows
{
- let rw = sync::RwLock::new(0);
+ let rw = RwLock::new(0);
{
let _read_guard = rw.read().unwrap();
drop(rw.read().unwrap());
drop(rw.try_read().unwrap());
- let try_lock_error = rw.try_write().unwrap_err();
- if let sync::TryLockError::Poisoned(e) = try_lock_error {
- panic!("{}", e);
- }
+ assert!(rw.try_write().unwrap_err().would_block());
}
{
let _write_guard = rw.write().unwrap();
- let try_lock_error = rw.try_read().unwrap_err();
- if let sync::TryLockError::Poisoned(e) = try_lock_error {
- panic!("{}", e);
- }
- let try_lock_error = rw.try_write().unwrap_err();
- if let sync::TryLockError::Poisoned(e) = try_lock_error {
- panic!("{}", e);
- }
+ assert!(rw.try_read().unwrap_err().would_block());
+ assert!(rw.try_write().unwrap_err().would_block());
}
// need to go a layer deeper and test the behavior of libc functions, because
assert_eq!(libc::pthread_mutex_destroy(&mut mutex as *mut _), 0);
}
+ let rw = std::cell::UnsafeCell::new(libc::PTHREAD_RWLOCK_INITIALIZER);
unsafe {
- let mut rw: libc::pthread_rwlock_t = std::mem::zeroed();
- assert_eq!(libc::pthread_rwlock_init(&mut rw as *mut _, std::ptr::null_mut()), 0);
+ assert_eq!(libc::pthread_rwlock_rdlock(rw.get()), 0);
+ assert_eq!(libc::pthread_rwlock_rdlock(rw.get()), 0);
+ assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
+ assert_eq!(libc::pthread_rwlock_tryrdlock(rw.get()), 0);
+ assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
+ assert_eq!(libc::pthread_rwlock_trywrlock(rw.get()), libc::EBUSY);
+ assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
+
+ assert_eq!(libc::pthread_rwlock_wrlock(rw.get()), 0);
+ assert_eq!(libc::pthread_rwlock_tryrdlock(rw.get()), libc::EBUSY);
+ assert_eq!(libc::pthread_rwlock_trywrlock(rw.get()), libc::EBUSY);
+ assert_eq!(libc::pthread_rwlock_unlock(rw.get()), 0);
- assert_eq!(libc::pthread_rwlock_rdlock(&mut rw as *mut _), 0);
- assert_eq!(libc::pthread_rwlock_rdlock(&mut rw as *mut _), 0);
- assert_eq!(libc::pthread_rwlock_unlock(&mut rw as *mut _), 0);
- assert_eq!(libc::pthread_rwlock_tryrdlock(&mut rw as *mut _), 0);
- assert_eq!(libc::pthread_rwlock_unlock(&mut rw as *mut _), 0);
- assert_eq!(libc::pthread_rwlock_trywrlock(&mut rw as *mut _), libc::EBUSY);
- assert_eq!(libc::pthread_rwlock_unlock(&mut rw as *mut _), 0);
+ assert_eq!(libc::pthread_rwlock_destroy(rw.get()), 0);
+ }
+ }
+}
- assert_eq!(libc::pthread_rwlock_wrlock(&mut rw as *mut _), 0);
- assert_eq!(libc::pthread_rwlock_tryrdlock(&mut rw as *mut _), libc::EBUSY);
- assert_eq!(libc::pthread_rwlock_trywrlock(&mut rw as *mut _), libc::EBUSY);
- assert_eq!(libc::pthread_rwlock_unlock(&mut rw as *mut _), 0);
+trait TryLockErrorExt<T> {
+ fn would_block(&self) -> bool;
+}
- assert_eq!(libc::pthread_rwlock_destroy(&mut rw as *mut _), 0);
+impl<T> TryLockErrorExt<T> for TryLockError<T> {
+ fn would_block(&self) -> bool {
+ match self {
+ TryLockError::WouldBlock => true,
+ TryLockError::Poisoned(_) => false,
}
}
}