1 files changed, 29 insertions, 0 deletions
diff --git a/src/user/knob/quit.c b/src/user/knob/quit.c
new file mode 100644
index 0000000..a2ef5aa
--- /dev/null
+++ b/src/user/knob/quit.c
@@ -0,0 +1,29 @@
+#include <pland/syscall.h>
+#include <knob/heap.h>
+
+struct quit_list_node {
+  struct quit_list_node *prev;
+  void (*f)();
+};
+
+static struct quit_list_node head = {
+  .f = &_exit_task
+};
+
+static struct quit_list_node *last = &head;
+
+void on_quit(void (*run_f)()) {
+  struct quit_list_node *new = get_block(sizeof(struct quit_list_node));
+  new->prev = last;
+  new->f = run_f;
+  last = new;
+}
+
+__attribute__ ((noreturn))
+void quit() {
+  struct quit_list_node *node = last;
+  while (1) {
+    node->f();
+    node = node->prev;
+  }
+}
+\ No newline at end of file