refactor(engine): add OpenGL object currently bound guards

1 files changed, 22 insertions, 0 deletions

diff --git a/engine/src/currently_bound.rs b/engine/src/currently_bound.rs
new file mode 100644
index 0000000..eefa239
--- /dev/null
+++ b/engine/src/currently_bound.rs
@@ -0,0 +1,22 @@
+use std::marker::PhantomData;
+
+/// A token signifying a OpenGL object is currently bound.
+pub struct CurrentlyBound<'token, Object>
+{
+    _token: PhantomData<&'token Object>,
+}
+
+impl<'token, Object> CurrentlyBound<'token, Object>
+{
+    /// Returns a new `CurrentlyBound`.
+    ///
+    /// # Safety
+    /// A object must actually be currently bound. Otherwise, UB can occur.
+    #[must_use]
+    pub unsafe fn new() -> Self
+    {
+        Self {
+            _token: PhantomData,
+        }
+    }
+}