33 lines
806 B
Rust
33 lines
806 B
Rust
// ignore-windows: No libc on Windows
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#![feature(rustc_private)]
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extern crate libc;
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use std::cell::UnsafeCell;
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use std::sync::Arc;
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use std::thread;
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struct RwLock(UnsafeCell<libc::pthread_rwlock_t>);
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unsafe impl Send for RwLock {}
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unsafe impl Sync for RwLock {}
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fn new_lock() -> Arc<RwLock> {
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Arc::new(RwLock(UnsafeCell::new(libc::PTHREAD_RWLOCK_INITIALIZER)))
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}
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fn main() {
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unsafe {
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let lock = new_lock();
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assert_eq!(libc::pthread_rwlock_wrlock(lock.0.get() as *mut _), 0);
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let lock_copy = lock.clone();
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thread::spawn(move || {
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assert_eq!(libc::pthread_rwlock_unlock(lock_copy.0.get() as *mut _), 0); //~ ERROR: Undefined Behavior: unlocked an rwlock that was not locked by the active thread
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})
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.join()
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.unwrap();
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}
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}
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