feat: add example for cdylib

wfassoc-cdylib/src/object_pool.rs

@@ -44,9 +44,14 @@ impl<T> ObjectPool<T> {
         Ok(Self::key_to_token(&key))
     }
 
-    pub fn delete(&mut self, token: Token) -> Result<(), Error> {
+    pub fn free(&mut self, token: Token) -> Result<(), Error> {
+        let _ = self.pop(token)?;
+        Ok(())
+    }
+
+    pub fn pop(&mut self, token: Token) -> Result<T, Error> {
         match self.objs.remove(Self::token_to_key(token)) {
-            Some(_) => Ok(()),
+            Some(obj) => Ok(obj),
             None => Err(Error::NoSuchToken),
         }
     }