feat(core): WIP deinit arena allocator

src/core/allocator.zig

@@ -0,0 +1,32 @@
+const std = @import("std");
+
+const Allocator = std.mem.Allocator;
+
+pub const Callback = struct {
+    context: *anyopaque,
+    invokeFn: *const fn (ctx: *anyopaque) void,
+
+    pub fn call(self: *const @This()) void {
+        self.invokeFn(self.context);
+    }
+
+    pub fn create(obj: anytype) Callback {
+        return Callback {
+            .context = @ptrCast(@alignCast(obj)),
+            .invokeFn = @TypeOf(obj.*).deinit,
+        };
+    }
+};
+
+pub const DeinitArena = struct {
+    arena: std.heap.ArenaAllocator,
+    deiniters: std.ArrayList(Callback),
+
+    pub fn deinit(self: *DeinitArena) void {
+        for (self.deiniters.items) |deiniter| {
+            deiniter.deinit(deiniter.context);
+        }
+
+        self.arena.deinit();
+    }
+};