Add a handy consume() method to LinkedList

kernel/src/main.cpp

@@ -46,18 +46,7 @@ void reap_thread()
         auto dying_threads = Scheduler::check_for_dying_threads();
         CPU::enable_interrupts();
 
-        if (dying_threads.count())
-        {
-            Thread* thread_to_reap = dying_threads.expect_first();
-            Thread* next_thread = thread_to_reap;
-
-            while (thread_to_reap)
-            {
-                next_thread = dying_threads.next(thread_to_reap).value_or(nullptr);
-                Scheduler::reap_thread(thread_to_reap);
-                thread_to_reap = next_thread;
-            }
-        }
+        dying_threads.consume([](Thread* thread) { Scheduler::reap_thread(thread); });
 
         kernel_sleep(250);
     }

luna/include/luna/LinkedList.h

@@ -155,26 +155,45 @@ template <typename T> class DoublyLinkedList
         return nonnull_or_error((T*)extract_node(item)->get_last());
     }
 
+    // Iterates over the elements of the DoublyLinkedList from start to end, calling callback for every element.
     template <typename Callback> void for_each(Callback callback)
     {
         for (Node* node = m_start_node; node; node = node->get_next()) { callback((T*)node); }
     }
 
+    // Iterates over the elements of the DoublyLinkedList from end to start, calling callback for every element.
     template <typename Callback> void for_each_reversed(Callback callback)
     {
         for (Node* node = m_end_node; node; node = node->get_last()) { callback((T*)node); }
     }
 
+    // Iterates over the elements of the DoublyLinkedList from the element after 'start' to end, calling callback for
+    // every element.
     template <typename Callback> void for_each_after(T* start, Callback callback)
     {
         for (Node* node = extract_node(start)->m_next_node; node; node = node->get_next()) { callback((T*)node); }
     }
 
+    // Iterates over the elements of the DoublyLinkedList from the element before 'end' to start, calling callback for
+    // every element.
     template <typename Callback> void for_each_before(T* end, Callback callback)
     {
         for (Node* node = extract_node(end)->m_last_node; node; node = node->get_last()) { callback((T*)node); }
     }
 
+    // Iterates over the elements of the DoublyLinkedList from start to end, removing each element before passing it to
+    // the callback.
+    template <typename Callback> void consume(Callback callback)
+    {
+        for (Node* node = m_start_node; node;)
+        {
+            T* current = (T*)node;
+            node = node->get_next();
+            remove(current);
+            callback(current);
+        }
+    }
+
     usize count()
     {
         return m_count;