Add allocator interface

src/mini_arena.h

@@ -71,7 +71,7 @@ static INLINE void *marena_push(MArena *arena, U32 size)
 }
 
 [[gnu::alloc_align(3)]]
-static INLINE void *maren_push_aligned(MArena *arena, U32 size, U32 align)
+static INLINE void *marena_push_aligned(MArena *arena, U32 size, U32 align)
 {
     Assert(IsPow2(align));
 
@@ -94,3 +94,28 @@ static INLINE void marena_reset(MArena *arena)
 {
     arena->first_free = 0;
 }
+
+static INLINE void *marena_allocator_func(Allocator *allocator, AllocOperation operation , void *memory, U32 size, U32 align)
+{
+    switch (operation) {
+        case Alloc_Op_Aligned:
+            return marena_push_aligned(allocator->data, size, align);
+
+        case Alloc_Op_Free: // can't free/Free_all from  an marena
+            return NULL;
+
+        case Alloc_Op_Free_All:
+            return NULL;
+    }
+
+    Assert(false);
+}
+
+static INLINE Allocator marena_allocator(MArena *arena)
+{
+    Allocator allocator = {};
+    allocator.op_func_ptr = marena_allocator_func;
+    allocator.data = arena;
+
+    return allocator;
+}