From 257012f6ac2ee95b51eb265ac6991e46b10f82f2 Mon Sep 17 00:00:00 2001
From: Warwick <warwick.l.e.new@gmail.com>
Date: Sun, 23 Nov 2025 21:36:13 +0000
Subject: [PATCH] Added a forced alignment. Shame it makes small allocations
 bigger but it works for now

---
 src/arena_allocator.c | 6 ++++--
 src/main.c            | 5 +++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/arena_allocator.c b/src/arena_allocator.c
index 2656040..233d6e2 100644
--- a/src/arena_allocator.c
+++ b/src/arena_allocator.c
@@ -21,8 +21,8 @@ Arena arena_init(Arena *parent, size_t capacity) {
   if (parent != NULL) {
     // Allocate new arena in parent to reduce likelyhood of loss
     Arena *current_arena = arena_alloc(parent, sizeof(Arena));
-    *current_arena = (Arena){
-        .begin = region, .end = region, .child = NULL, .sibling = NULL};
+    *current_arena =
+        (Arena){.begin = region, .end = region, .child = NULL, .sibling = NULL};
 
     // if parent has no children this arena is now it's child
     if (parent->child == NULL) {
@@ -66,6 +66,8 @@ void arena_deinit(Arena *arena) {
 }
 
 void *arena_alloc(Arena *arena, size_t size) {
+  // TODO: only align when needed
+  size = (size + 7) & ~7; // align size increase to multiple of 8
   Region *region = arena->end;
   assert(region != NULL);
 
diff --git a/src/main.c b/src/main.c
index 2f94416..9eeb1ca 100644
--- a/src/main.c
+++ b/src/main.c
@@ -13,14 +13,14 @@
 
 int main(int argc, char *argv[]) {
   // arena allocation test
-  printf("Allocation test");
+  printf("Allocation test\n");
   Arena global_arena = arena_init(NULL, 0);
   for (int i = 0; i <= 1048576+100; i++) {
     int *number = arena_alloc(&global_arena, sizeof(int));
     *number = 42;
   }
 
-  printf("children test");
+  printf("children test\n");
 
   // arena children test
   Arena child_arena = arena_init(&global_arena, 0);
@@ -29,6 +29,7 @@ int main(int argc, char *argv[]) {
 
   arena_deinit(&global_arena);
 
+  printf("tests complete\n");
   
 }