1 files changed, 63 insertions, 0 deletions
diff --git a/libdrmutils/drm_lib_loader.h b/libdrmutils/drm_lib_loader.h
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+++ b/libdrmutils/drm_lib_loader.h
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+/*
+* Copyright (c) 2017, The Linux Foundation. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+*   * Redistributions of source code must retain the above copyright
+*     notice, this list of conditions and the following disclaimer.
+*   * Redistributions in binary form must reproduce the above
+*     copyright notice, this list of conditions and the following
+*     disclaimer in the documentation and/or other materials provided
+*     with the distribution.
+*   * Neither the name of The Linux Foundation nor the names of its
+*     contributors may be used to endorse or promote products derived
+*     from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef __DRM_LIB_LOADER_H__
+#define __DRM_LIB_LOADER_H__
+
+#include <drm_interface.h>
+#include <mutex>
+
+namespace drm_utils {
+
+class DRMLibLoader {
+ public:
+  ~DRMLibLoader() {}
+  bool IsLoaded() { return is_loaded_; }
+  sde_drm::GetDRMManager FuncGetDRMManager() { return func_get_drm_manager_; }
+  sde_drm::DestroyDRMManager FuncDestroyDRMManager() { return func_destroy_drm_manager_; }
+
+  static DRMLibLoader *GetInstance();
+
+ private:
+  DRMLibLoader();
+  bool Open(const char *lib_name);
+  bool Sym(const char *func_name, void **func_ptr);
+
+  void *lib_ = {};
+  sde_drm::GetDRMManager func_get_drm_manager_ = {};
+  sde_drm::DestroyDRMManager func_destroy_drm_manager_ = {};
+  bool is_loaded_ = false;
+
+  static DRMLibLoader *s_instance;  // Singleton instance
+  static std::mutex s_lock;
+};
+
+}  // namespace drm_utils
+
+#endif  // __DRM_LIB_LOADER_H__