1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <memory>
20 
21 #include <android-base/logging.h>
22 
23 #include <wayland-server-core.h>
24 
25 namespace wayland {
26 
27 // Helper for getting typed user data from of a wayland resource.
28 template <typename T>
GetUserData(wl_resource * resource)29 T* GetUserData(wl_resource* resource) {
30   void* data = wl_resource_get_user_data(resource);
31   CHECK(data != nullptr);
32   return static_cast<T*>(data);
33 }
34 
35 // Helper for cleaning up typed user data from of a wayland resource.
36 template <typename T>
DestroyUserData(wl_resource * resource)37 void DestroyUserData(wl_resource* resource) {
38   std::unique_ptr<T> data(GetUserData<T>(resource));
39   wl_resource_set_user_data(resource, nullptr);
40 }
41 
42 }  // namespace wayland
43