1 files changed, 15 insertions, 0 deletions
diff --git a/src/nvim/memory_defs.h b/src/nvim/memory_defs.h
new file mode 100644
index 0000000000..bde0e54f54
--- /dev/null
+++ b/src/nvim/memory_defs.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stddef.h>
+
+typedef struct consumed_blk {
+  struct consumed_blk *prev;
+} *ArenaMem;
+
+typedef struct {
+  char *cur_blk;
+  size_t pos, size;
+} Arena;
+
+// inits an empty arena.
+#define ARENA_EMPTY { .cur_blk = NULL, .pos = 0, .size = 0 }