Reimplement Allocator API for Arena

src/core/mem/arena/mem_arena.c

@@ -1,5 +1,6 @@
 #include "mem_arena.h"
 #include "aliases.h"
+#include "mem_allocator.h"
 #include "mem_utils.h"
 #include <stdbool.h>
 #include <stdlib.h>
@@ -24,8 +25,40 @@ struct arena {
 #endif // ifdef WAPP_PLATFORM_WINDOWS
 };
 
-// PUBLIC API
+#pragma region Arena Allocator wrappers declarations
+internal inline void *mem_arena_alloc(u64 size, void *alloc_obj);
+internal inline void *mem_arena_alloc_aligned(u64 size, u64 alignment,
+                                              void *alloc_obj);
+#pragma endregion Arena Allocator wrappers declarations
 
+#pragma region Arena Allocator API definitions
+Allocator wapp_mem_arena_allocator_init_custom(u64 base_capacity,
+                                               MemAllocFlags flags,
+                                               bool zero_buffer) {
+  Allocator allocator = {0};
+  bool initialised = wapp_mem_arena_init_custom(
+      (Arena **)(&allocator.obj), base_capacity, flags, zero_buffer);
+  if (!initialised) {
+    return allocator;
+  }
+
+  allocator.alloc = mem_arena_alloc;
+  allocator.alloc_aligned = mem_arena_alloc_aligned;
+
+  return allocator;
+}
+
+void wapp_mem_arena_allocator_clear(Allocator *allocator) {
+  wapp_mem_arena_clear((Arena *)(allocator->obj));
+}
+
+void wapp_mem_arena_allocator_destroy(Allocator *allocator) {
+  wapp_mem_arena_destroy((Arena **)(&(allocator->obj)));
+  *allocator = (Allocator){0};
+}
+#pragma endregion Arena Allocator API definitions
+
+#pragma region API definitions
 bool wapp_mem_arena_init_custom(Arena **arena, u64 base_capacity,
                                 MemAllocFlags flags, bool zero_buffer) {
   if (!arena || *arena || base_capacity == 0) {
@@ -116,3 +149,17 @@ void wapp_mem_arena_destroy(Arena **arena) {
   free(*arena);
   *arena = NULL;
 }
+#pragma endregion API definitions
+
+#pragma region Arena Allocator wrappers definitions
+internal inline void *mem_arena_alloc(u64 size, void *alloc_obj) {
+  Arena *arena = (Arena *)alloc_obj;
+  return wapp_mem_arena_alloc(arena, size);
+}
+
+internal inline void *mem_arena_alloc_aligned(u64 size, u64 alignment,
+                                              void *alloc_obj) {
+  Arena *arena = (Arena *)alloc_obj;
+  return wapp_mem_arena_alloc_aligned(arena, size, alignment);
+}
+#pragma endregion Arena Allocator wrappers definitions