From cbc14f9c6199259a48f1fa41bd3dd1fa2992333b Mon Sep 17 00:00:00 2001
From: Warwick <warwick.l.e.new@gmail.com>
Date: Wed, 26 Nov 2025 15:21:20 +0000
Subject: [PATCH] Added the ability to run deinit tasks when deleting arenas

---
 src/arena_allocator.c |  8 +++++---
 src/arena_allocator.h |  3 +--
 src/main.c            | 19 +++++++++++++++++--
 3 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/src/arena_allocator.c b/src/arena_allocator.c
index 7fae31d..64dc844 100644
--- a/src/arena_allocator.c
+++ b/src/arena_allocator.c
@@ -30,7 +30,8 @@ Arena *arena_init(Arena *parent, size_t capacity) {
                              .begin = region,
                              .end = region,
                              .child = NULL,
-                             .sibling = NULL};
+                             .sibling = NULL,
+                             .deinit_task_top = NULL};
 
     // if parent has no children this arena is now it's child
     if (parent->child == NULL) {
@@ -50,7 +51,8 @@ Arena *arena_init(Arena *parent, size_t capacity) {
                    .begin = region,
                    .end = region,
                    .child = NULL,
-                   .sibling = NULL};
+                   .sibling = NULL,
+                   .deinit_task_top = NULL};
   return arena;
 }
 
@@ -124,7 +126,7 @@ void *arena_alloc(Arena *arena, size_t size) {
   return result;
 }
 
-void arena_run_on_deinit_push(Arena *arena, ArenaDeinitTask task) {
+void arena_deinit_task_push(Arena *arena, ArenaDeinitTask task) {
   ArenaDeinitTask *job = arena_alloc(arena, sizeof(ArenaDeinitTask));
   *job = task;
 
diff --git a/src/arena_allocator.h b/src/arena_allocator.h
index bffc803..6fafa1b 100644
--- a/src/arena_allocator.h
+++ b/src/arena_allocator.h
@@ -16,7 +16,6 @@ struct ArenaDeinitTask_s {
   void (*func_ptr)(void *);
   ArenaDeinitTask *next;
 };
-ArenaDeinitTask ArenaDeinitTask_default = {NULL};
 
 typedef struct Arena_s Arena;
 struct Arena_s {
@@ -31,7 +30,7 @@ struct Arena_s {
 Arena *arena_init(Arena *parent, size_t capacity);
 void arena_deinit(Arena *arena);
 
-void arena_run_on_deinit_push(Arena *arena, ArenaDeinitTask task);
+void arena_deinit_task_push(Arena *arena, ArenaDeinitTask task);
 
 void *arena_alloc(Arena *arena, size_t size);
 // void *arena_clear(Arena *arena);
diff --git a/src/main.c b/src/main.c
index 867478d..5dd5a75 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,5 +1,6 @@
 #include <GL/glew.h>
 #include <SDL3/SDL.h>
+#include <stdio.h>
 #include <stdlib.h>
 
 #include "SDL3/SDL_events.h"
@@ -10,7 +11,9 @@
 
 #include "arena_allocator.h"
 
-/*
+void test_task(void *data) {
+  printf("\ttest task has been run: %s\n", (char *)data);
+}
 int main(int argc, char *argv[]) {
   // arena allocation test
   printf("Allocation test\n");
@@ -33,6 +36,17 @@ int main(int argc, char *argv[]) {
   Arena *greatsiblinggreatgrandchild_arena =
       arena_init(greatgrandchildsiblingsibling_arena, 0);
 
+  printf("deinit task creation tests\n");
+
+  ArenaDeinitTask task = {NULL};
+  task.func_ptr = *test_task;
+  task.func_param = "parameter";
+
+  arena_deinit_task_push(global_arena, task);
+
+  task.func_param = "2nd parameter added";
+  arena_deinit_task_push(global_arena, task);
+
   printf("deinit tests\n");
   arena_deinit(greatgrandchild_arena);
 
@@ -40,8 +54,8 @@ int main(int argc, char *argv[]) {
 
   printf("tests complete\n");
 }
-*/
 
+/*
 int main(int argc, char *argv[]) {
   wn_window window = {0};
   if (!wn_window_init(&window)) {
@@ -156,3 +170,4 @@ int main(int argc, char *argv[]) {
 
   return EXIT_SUCCESS;
 }
+*/