Add mark_reachable()

1 files changed, 12 insertions, 0 deletions

diff --git a/runtime/src/gc.c b/runtime/src/gc.c
index 97f26ba1..6958a772 100644
--- a/runtime/src/gc.c
+++ b/runtime/src/gc.c
@@ -103,3 +103,15 @@ void shed__runtime__gc_add_perm_root(ShedObject gc_root) {
     gc_perm_roots[gc_perm_root_index] = (struct ShedGcObjectHeader*) gc_root;
     gc_perm_root_index++;
 }
+
+// == Collection ==
+
+void mark_reachable() {
+    for (size_t i = 0; i < gc_perm_root_index; i++) {
+        mark(gc_perm_roots[i]);
+    }
+
+    for (size_t i = 0; i < gc_root_stack_index; i++) {
+        mark(gc_root_stack[i]);
+    }
+}