Keyable

1 files changed, 0 insertions, 98 deletions

diff --git a/src/lock.rs b/src/lock.rs
deleted file mode 100644
index 942474a..0000000
--- a/src/lock.rs
+++ /dev/null
@@ -1,98 +0,0 @@
-use std::fmt::{self, Debug};
-use std::marker::PhantomData;
-use std::sync::atomic::{AtomicBool, Ordering};
-
-use once_cell::sync::Lazy;
-use thread_local::ThreadLocal;
-
-static KEY: Lazy<ThreadLocal<Lock>> = Lazy::new(ThreadLocal::new);
-
-/// The key for the current thread.
-///
-/// Only one of these exist per thread. To get the current thread's key, call
-/// [`ThreadKey::lock`]. If the `ThreadKey` is dropped, it can be reobtained.
-pub type ThreadKey = Key<'static>;
-
-/// A dumb lock that's just a wrapper for an [`AtomicBool`].
-#[derive(Debug, Default)]
-pub struct Lock {
-	is_locked: AtomicBool,
-}
-
-pub struct Key<'a> {
-	phantom: PhantomData<*const ()>, // implement !Send and !Sync
-	lock: &'a Lock,
-}
-
-impl Debug for ThreadKey {
-	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-		write!(f, "ThreadKey")
-	}
-}
-
-impl<'a> Drop for Key<'a> {
-	fn drop(&mut self) {
-		unsafe { self.lock.force_unlock() }
-	}
-}
-
-impl ThreadKey {
-	/// Get the current thread's `ThreadKey`, if it's not already taken.
-	///
-	/// The first time this is called, it will successfully return a
-	/// `ThreadKey`. However, future calls to this function will return
-	/// [`None`], unless the key is dropped or unlocked first.
-	#[must_use]
-	pub fn lock() -> Option<Self> {
-		KEY.get_or_default().try_lock()
-	}
-
-	/// Unlocks the `ThreadKey`.
-	///
-	/// After this method is called, a call to [`ThreadKey::lock`] will return
-	/// this `ThreadKey`.
-	pub fn unlock(key: Self) {
-		drop(key);
-	}
-}
-
-impl Lock {
-	/// Create a new unlocked `Lock`.
-	#[must_use]
-	pub const fn new() -> Self {
-		Self {
-			is_locked: AtomicBool::new(false),
-		}
-	}
-
-	/// Checks whether this `Lock` is currently locked.
-	pub fn is_locked(&self) -> bool {
-		self.is_locked.load(Ordering::Relaxed)
-	}
-
-	/// Attempt to lock the `Lock`.
-	///
-	/// If the lock is already locked, then this'll return false. If it is
-	/// unlocked, it'll return true. If the lock is currently unlocked, then it
-	/// will be locked after this function is called.
-	///
-	/// This is not a fair lock. It is not recommended to call this function
-	/// repeatedly in a loop.
-	pub fn try_lock(&self) -> Option<Key> {
-		// safety: we just acquired the lock
-		(!self.is_locked.swap(true, Ordering::Acquire)).then_some(Key {
-			phantom: PhantomData,
-			lock: self,
-		})
-	}
-
-	/// Forcibly unlocks the `Lock`.
-	///
-	/// # Safety
-	///
-	/// This should only be called if the key to the lock has been "lost". That
-	/// means the program no longer has a reference to the key.
-	pub unsafe fn force_unlock(&self) {
-		self.is_locked.store(false, Ordering::Release);
-	}
-}