73 lines
1.5 KiB
Rust
73 lines
1.5 KiB
Rust
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use crate::cell::RefCell;
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use crate::sync::Arc;
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use crate::sys_common::remutex::{ReentrantMutex, ReentrantMutexGuard};
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use crate::thread;
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#[test]
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fn smoke() {
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let m = unsafe {
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let m = ReentrantMutex::new(());
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m.init();
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m
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};
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{
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let a = m.lock();
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{
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let b = m.lock();
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{
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let c = m.lock();
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assert_eq!(*c, ());
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}
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assert_eq!(*b, ());
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}
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assert_eq!(*a, ());
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}
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}
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#[test]
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fn is_mutex() {
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let m = unsafe {
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let m = Arc::new(ReentrantMutex::new(RefCell::new(0)));
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m.init();
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m
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};
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let m2 = m.clone();
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let lock = m.lock();
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let child = thread::spawn(move || {
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let lock = m2.lock();
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assert_eq!(*lock.borrow(), 4950);
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});
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for i in 0..100 {
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let lock = m.lock();
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*lock.borrow_mut() += i;
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}
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drop(lock);
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child.join().unwrap();
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}
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#[test]
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fn trylock_works() {
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let m = unsafe {
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let m = Arc::new(ReentrantMutex::new(()));
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m.init();
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m
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};
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let m2 = m.clone();
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let _lock = m.try_lock();
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let _lock2 = m.try_lock();
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thread::spawn(move || {
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let lock = m2.try_lock();
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assert!(lock.is_none());
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})
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.join()
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.unwrap();
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let _lock3 = m.try_lock();
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}
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pub struct Answer<'a>(pub ReentrantMutexGuard<'a, RefCell<u32>>);
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impl Drop for Answer<'_> {
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fn drop(&mut self) {
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*self.0.borrow_mut() = 42;
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}
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}
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