1 /*
2  * Copyright (C) 2023 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 <functional>
20 #include <memory>
21 
22 #include "Expected.h"
23 
24 namespace gfxstream {
25 
26 class Lib {
27  public:
28   static gfxstream::expected<Lib, std::string> Load(const char* name);
29 
30   Lib() = default;
31 
32   Lib(const Lib&) = delete;
33   Lib& operator=(const Lib&) = delete;
34 
35   Lib(Lib&&) = default;
36   Lib& operator=(Lib&&) = default;
37 
38   using FunctionPtr = void (*)(void);
39 
40   FunctionPtr GetSymbol(const char* name);
41 
42  private:
43   struct LibraryCloser {
44    public:
45     void operator()(void* library);
46   };
47 
48   using ManagedLibrary = std::unique_ptr<void, LibraryCloser>;
49 
50   ManagedLibrary lib_;
51 };
52 
53 }  // namespace gfxstream
54