1/*
2* Copyright (c) 2017, The Linux Foundation. All rights reserved.
3*
4* Redistribution and use in source and binary forms, with or without
5* modification, are permitted provided that the following conditions are
6* met:
7*   * Redistributions of source code must retain the above copyright
8*     notice, this list of conditions and the following disclaimer.
9*   * Redistributions in binary form must reproduce the above
10*     copyright notice, this list of conditions and the following
11*     disclaimer in the documentation and/or other materials provided
12*     with the distribution.
13*   * Neither the name of The Linux Foundation nor the names of its
14*     contributors may be used to endorse or promote products derived
15*     from this software without specific prior written permission.
16*
17* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*/
29
30#ifndef __DRM_LIB_LOADER_H__
31#define __DRM_LIB_LOADER_H__
32
33#include <drm_interface.h>
34#include <mutex>
35
36namespace drm_utils {
37
38class DRMLibLoader {
39 public:
40  ~DRMLibLoader();
41  bool IsLoaded() { return is_loaded_; }
42  sde_drm::GetDRMManager FuncGetDRMManager() { return func_get_drm_manager_; }
43  sde_drm::DestroyDRMManager FuncDestroyDRMManager() { return func_destroy_drm_manager_; }
44
45  static DRMLibLoader *GetInstance();
46  static void Destroy();
47
48 private:
49  DRMLibLoader();
50  bool Open(const char *lib_name);
51  bool Sym(const char *func_name, void **func_ptr);
52
53  void *lib_ = {};
54  sde_drm::GetDRMManager func_get_drm_manager_ = {};
55  sde_drm::DestroyDRMManager func_destroy_drm_manager_ = {};
56  bool is_loaded_ = false;
57
58  static DRMLibLoader *s_instance;  // Singleton instance
59  static std::mutex s_lock;
60};
61
62}  // namespace drm_utils
63
64#endif  // __DRM_LIB_LOADER_H__
65