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 36 namespace drm_utils { 37 38 class 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