1 files changed, 21 insertions, 0 deletions
diff --git a/internal/concurrent_set.h b/internal/concurrent_set.h
new file mode 100644
index 0000000000..76cbefab04
--- /dev/null
+++ b/internal/concurrent_set.h
@@ -0,0 +1,21 @@
+#ifndef RUBY_RACTOR_SAFE_TABLE_H
+#define RUBY_RACTOR_SAFE_TABLE_H
+
+#include "ruby/atomic.h"
+#include "ruby/ruby.h"
+
+struct rb_concurrent_set_funcs {
+    VALUE (*hash)(VALUE key);
+    bool (*cmp)(VALUE a, VALUE b);
+    VALUE (*create)(VALUE key, void *data);
+    void (*free)(VALUE key);
+};
+
+VALUE rb_concurrent_set_new(const struct rb_concurrent_set_funcs *funcs, int capacity);
+rb_atomic_t rb_concurrent_set_size(VALUE set_obj);
+VALUE rb_concurrent_set_find(VALUE *set_obj_ptr, VALUE key);
+VALUE rb_concurrent_set_find_or_insert(VALUE *set_obj_ptr, VALUE key, void *data);
+VALUE rb_concurrent_set_delete_by_identity(VALUE set_obj, VALUE key);
+void rb_concurrent_set_foreach_with_replace(VALUE set_obj, int (*callback)(VALUE *key, void *data), void *data);
+
+#endif