--- a/dowa/d_memory.c	Mon Oct 06 09:55:34 2025 -0700
+++ b/dowa/d_memory.c	Mon Oct 06 10:13:41 2025 -0700
@@ -26,7 +26,7 @@
   return currnet_ptr;
 }
 
-void Dowa_Arena_Free(Dowa_PArena p_arena)
+void Dowa_Arena_Destory(Dowa_PArena p_arena)
 {
   if (p_arena)
   {
@@ -56,9 +56,37 @@
   return p_hash_map;
 }
 
-void Dowa_HashMap_Free(Dowa_PHashMap p_hash_map)
+Dowa_PHashMap Dowa_HashMap_Create(size_t capacity, Dowa_PArena p_arena)
 {
-  if (p_hash_map)
+  if (p_arena == NULL)
+    printf("Arena is NULL");
+    return Dowa_HashMap_Create(capacity);
+
+  Dowa_PHashMap p_hash_map;
+  p_hash_map = Dowa_Arena_Allocate(p_arena, sizeof(Dowa_HashMap));
+  if (p_hash_map == NULL)
+  {
+    return NULL;
+  }
+  p_hash_map->entries = Dowa_Arena_Allocate(p_arena, sizeof(*p_hash_map->entries) * capacity);
+  if (p_hash_map->entries == NULL)
+  {
+    free(p_hash_map);
+    return NULL;
+  }
+  p_hash_map->capacity = capacity;
+  p_hash_map->current_capacity = 0;
+  p_hash_map->p_arena = p_arena;
+  return p_hash_map;
+}
+
+void Dowa_HashMap_Destory(Dowa_PHashMap p_hash_map)
+{
+  if (!p_hash_map) return;
+
+  if (p_hash_map->p_arena)
+    Dowa_Arena_Destory(p_hash_map->p_arena);
+  else
   {
     Dowa_PHashEntry entry;
     if (p_hash_map->entries)
@@ -73,13 +101,13 @@
           free(entry);
         }
       }
-      free(p_hash_map->entries);
     }
+    free(p_hash_map->entries);
   }
   free(p_hash_map);
 }
 
-int32 Dowa_HashMap_GetPosition(Dowa_PHashMap p_hash_map, char *key)
+int32 Dowa_HashMap_Get_Position(Dowa_PHashMap p_hash_map, char *key)
 {
   int32 hash_val = HASH_KEY_NUMBER;
   int32 c;
@@ -92,7 +120,7 @@
 
 void *Dowa_HashMap_Get(Dowa_PHashMap p_hash_map, char *key)
 {
-  int idx_foo = Dowa_HashMap_GetPosition(p_hash_map, key);
+  int idx_foo = Dowa_HashMap_Get_Position(p_hash_map, key);
   void *value = p_hash_map->entries[idx_foo];
   if (value == NULL || strcmp(((Dowa_PHashEntry) value)->key, key) != 0)
   {
@@ -101,7 +129,7 @@
   return ((Dowa_PHashEntry) value)->buffer;
 }
 
-int32 Dowa_HashMap_PushValueWithTypeNoCopy(Dowa_PHashMap p_hash_map, char *key, void *value, size_t value_size, Dowa_HashMap_ValueType type)
+int32 Dowa_HashMap_Push_Value_With_Type_NoCopy(Dowa_PHashMap p_hash_map, char *key, void *value, size_t value_size, Dowa_HashMap_ValueType type)
 {
   int idx = Dowa_HashMap_GetPosition(p_hash_map, key);
   Dowa_PHashEntry entry = p_hash_map->entries[idx];
@@ -109,8 +137,10 @@
     free(entry->buffer);
   else 
   {
-    entry = malloc(sizeof(Dowa_HashEntry));
-    if (entry == NULL) { perror("malloc"); return -1; }
+    entry = p_hash_map->p_arena ? 
+      Dowa_Arena_Allocate(p_hash_map->p_arena, sizeof(Dowa_HashEntry)) :
+      malloc(sizeof(Dowa_HashEntry));
+    if (entry == NULL) { perror("malloc or arena alloc"); return -1; }
 
     p_hash_map->entries[idx] = entry;
     p_hash_map->current_capacity++;
@@ -122,7 +152,7 @@
   return 0;
 }
 
-int32 Dowa_HashMap_PushValueWithType(Dowa_PHashMap p_hash_map, char *key, void *value, size_t value_size, Dowa_HashMap_ValueType type)
+int32 Dowa_HashMap_Push_Value_With_Type(Dowa_PHashMap p_hash_map, char *key, void *value, size_t value_size, Dowa_HashMap_ValueType type)
 {
   int idx = Dowa_HashMap_GetPosition(p_hash_map, key);
   Dowa_PHashEntry entry = p_hash_map->entries[idx];
@@ -130,27 +160,32 @@
     free(entry->buffer);
   else 
   {
-    entry = malloc(sizeof(Dowa_HashEntry));
-    if (entry == NULL) { perror("malloc"); return -1; }
+    entry = p_hash_map->p_arena ? 
+      Dowa_Arena_Allocate(p_hash_map->p_arena, sizeof(Dowa_HashEntry)) :
+      malloc(sizeof(Dowa_HashEntry));
+    if (entry == NULL) { perror("malloc or arena alloc"); return -1; }
 
     p_hash_map->entries[idx] = entry;
     p_hash_map->current_capacity++;
     entry->key = strdup(key);
   }
-  entry->buffer = malloc(value_size);
-  if (entry->buffer == NULL) { perror("malloc"); return -1; }
+  entry->buffer = p_hash_map->p_arena ? 
+    Dowa_Arena_Allocate(p_hash_map->p_arena, value_size) :
+    malloc(value_size);
+
+  if (entry->buffer == NULL) { perror("malloc or arena alloc"); return -1; }
   entry->capacity = value_size;
   entry->type = type;
   memcpy(entry->buffer, value, value_size);
   return 0;
 }
 
-void Dowa_HashMap_PushValue(Dowa_PHashMap p_hash_map, char *key, void *value, size_t value_size)
+void Dowa_HashMap_Push_Value(Dowa_PHashMap p_hash_map, char *key, void *value, size_t value_size)
 {
-  Dowa_HashMap_PushValueWithType(p_hash_map, key, value, value_size, DOWA_HASH_MAP_TYPE_BUFFER);
+  Dowa_HashMap_Push_Value_With_Type(p_hash_map, key, value, value_size, DOWA_HASH_MAP_TYPE_BUFFER);
 }
 
-void Dowa_HashMap_PopKey(Dowa_PHashMap p_hash_map, char *key)
+void Dowa_HashMap_Pop_Key(Dowa_PHashMap p_hash_map, char *key)
 {
   int idx = Dowa_HashMap_GetPosition(p_hash_map, key);
   Dowa_PHashEntry entry = p_hash_map->entries[idx];
@@ -211,7 +246,7 @@
   printf("-----------\n");
 }
 
-int Dowa_HashMap_Cache_Folder(Dowa_PHashMap map, const char *folder_path)
+int Dowa_HashMap_Cache_Folder(Dowa_PHashMap p_hash_map, const char *folder_path)
 {
   DIR *dir = opendir(folder_path);
   if (!dir) { perror("opendir"); return -1; }
@@ -237,7 +272,9 @@
       FILE *f = fopen(fullpath, "rb");
       if (!f) { perror("fopen"); continue; }
 
-      void *buf = malloc(size);
+      void *buf = p_hash_map->p_arena ? 
+        Dowa_Arena_Allocate(p_hash_map->p_arena, value_size) :
+        malloc(value_size);
       if (!buf) { perror("malloc"); fclose(f); closedir(dir); return -1; }
 
       if (fread(buf, 1, size, f) != size)
@@ -249,12 +286,12 @@
       }
       fclose(f);
 
-      Dowa_HashMap_PushValueWithType(map, entry->d_name, buf, size, DOWA_HASH_MAP_TYPE_STRING);
+      Dowa_HashMap_PushValueWithType(p_hash_map, entry->d_name, buf, size, DOWA_HASH_MAP_TYPE_STRING);
       free(buf);  // Dowa_HashMap_PushValue made its own copy
     }
     else if (S_ISDIR(st.st_mode))
     {
-      Dowa_PHashMap p_child_map = Dowa_HashMap_Create(100); 
+      Dowa_PHashMap p_child_map = Dowa_HashMap_Create(100, p_hash_map->p_arena); 
       if (!p_child_map)
       {
         perror("Dowa_HashMap_Create");
@@ -267,10 +304,10 @@
       }
 
       // Should not copy as we malloced already.
-      if (Dowa_HashMap_PushValueWithTypeNoCopy(map, entry->d_name, p_child_map,
+      if (Dowa_HashMap_Push_Value_With_Type_NoCopy(p_hash_map, entry->d_name, p_child_map,
                                          sizeof(p_child_map), DOWA_HASH_MAP_TYPE_HASHMAP) == -1)
       {
-        Dowa_HashMap_Free(p_child_map);
+        Dowa_HashMap_Destory(p_child_map);
         return -1;
       }
     }