Scoped lock API

1 files changed, 99 insertions, 0 deletions

diff --git a/tests/evil_unlock_mutex.rs b/tests/evil_unlock_mutex.rs
new file mode 100644
index 0000000..ee12abc
--- /dev/null
+++ b/tests/evil_unlock_mutex.rs
@@ -0,0 +1,99 @@
+use std::sync::Arc;
+
+use happylock::collection::{BoxedLockCollection, RetryingLockCollection};
+use happylock::mutex::Mutex;
+use happylock::ThreadKey;
+use lock_api::{GuardNoSend, RawMutex};
+
+struct KindaEvilMutex {
+	inner: parking_lot::RawMutex,
+}
+
+struct EvilMutex {}
+
+unsafe impl RawMutex for KindaEvilMutex {
+	#[allow(clippy::declare_interior_mutable_const)]
+	const INIT: Self = Self {
+		inner: parking_lot::RawMutex::INIT,
+	};
+
+	type GuardMarker = GuardNoSend;
+
+	fn lock(&self) {
+		self.inner.lock()
+	}
+
+	fn try_lock(&self) -> bool {
+		self.inner.try_lock()
+	}
+
+	unsafe fn unlock(&self) {
+		panic!("mwahahahaha");
+	}
+}
+
+unsafe impl RawMutex for EvilMutex {
+	#[allow(clippy::declare_interior_mutable_const)]
+	const INIT: Self = Self {};
+
+	type GuardMarker = GuardNoSend;
+
+	fn lock(&self) {
+		panic!("mwahahahaha");
+	}
+
+	fn try_lock(&self) -> bool {
+		panic!("mwahahahaha")
+	}
+
+	unsafe fn unlock(&self) {
+		panic!("mwahahahaha");
+	}
+}
+
+#[test]
+fn boxed_mutexes() {
+	let mut key = ThreadKey::get().unwrap();
+	let kinda_evil_mutex: Arc<Mutex<i32, KindaEvilMutex>> = Arc::new(Mutex::new(5));
+	let evil_mutex: Arc<Mutex<i32, EvilMutex>> = Arc::new(Mutex::new(7));
+	let useless_mutex: Arc<Mutex<i32, parking_lot::RawMutex>> = Arc::new(Mutex::new(10));
+	let c_good = Arc::clone(&kinda_evil_mutex);
+	let c_evil = Arc::clone(&evil_mutex);
+	let c_useless = Arc::clone(&useless_mutex);
+
+	let r = std::thread::spawn(move || {
+		let key = ThreadKey::get().unwrap();
+		let collection = BoxedLockCollection::try_new((&*c_good, &*c_evil, &*c_useless)).unwrap();
+		_ = collection.lock(key);
+	})
+	.join();
+
+	assert!(r.is_err());
+	assert!(kinda_evil_mutex.scoped_try_lock(&mut key, |_| {}).is_err());
+	assert!(evil_mutex.scoped_try_lock(&mut key, |_| {}).is_err());
+	assert!(useless_mutex.scoped_try_lock(&mut key, |_| {}).is_ok());
+}
+
+#[test]
+fn retrying_mutexes() {
+	let mut key = ThreadKey::get().unwrap();
+	let kinda_evil_mutex: Arc<Mutex<i32, KindaEvilMutex>> = Arc::new(Mutex::new(5));
+	let evil_mutex: Arc<Mutex<i32, EvilMutex>> = Arc::new(Mutex::new(7));
+	let useless_mutex: Arc<Mutex<i32, parking_lot::RawMutex>> = Arc::new(Mutex::new(10));
+	let c_good = Arc::clone(&kinda_evil_mutex);
+	let c_evil = Arc::clone(&evil_mutex);
+	let c_useless = Arc::clone(&useless_mutex);
+
+	let r = std::thread::spawn(move || {
+		let key = ThreadKey::get().unwrap();
+		let collection =
+			RetryingLockCollection::try_new((&*c_good, &*c_evil, &*c_useless)).unwrap();
+		collection.lock(key);
+	})
+	.join();
+
+	assert!(r.is_err());
+	assert!(kinda_evil_mutex.scoped_try_lock(&mut key, |_| {}).is_err());
+	assert!(evil_mutex.scoped_try_lock(&mut key, |_| {}).is_err());
+	assert!(useless_mutex.scoped_try_lock(&mut key, |_| {}).is_ok());
+}