1 files changed, 92 insertions, 0 deletions
diff --git a/msm8909/libdrmutils/drm_lib_loader.cpp b/msm8909/libdrmutils/drm_lib_loader.cpp
new file mode 100644
index 00000000..83c9f1b5
--- /dev/null
+++ b/msm8909/libdrmutils/drm_lib_loader.cpp
@@ -0,0 +1,92 @@
+/*
+* 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.
+*/
+
+#include <dlfcn.h>
+
+#include "drm_lib_loader.h"
+
+#define __CLASS__ "DRMLibLoader"
+
+using std::mutex;
+using std::lock_guard;
+
+namespace drm_utils {
+
+DRMLibLoader *DRMLibLoader::s_instance = nullptr;
+mutex DRMLibLoader::s_lock;
+
+DRMLibLoader *DRMLibLoader::GetInstance() {
+  lock_guard<mutex> obj(s_lock);
+
+  if (!s_instance) {
+    s_instance = new DRMLibLoader();
+  }
+
+  return s_instance;
+}
+
+void DRMLibLoader::Destroy() {
+  lock_guard<mutex> obj(s_lock);
+  if (s_instance) {
+    delete s_instance;
+    s_instance = nullptr;
+  }
+}
+
+DRMLibLoader::DRMLibLoader() {
+  if (Open("libsdedrm.so")) {
+    if (Sym("GetDRMManager", reinterpret_cast<void **>(&func_get_drm_manager_)) &&
+        Sym("DestroyDRMManager", reinterpret_cast<void **>(&func_destroy_drm_manager_))) {
+      is_loaded_ = true;
+    }
+  }
+}
+
+DRMLibLoader::~DRMLibLoader() {
+  if (lib_) {
+    ::dlclose(lib_);
+    lib_ = nullptr;
+  }
+}
+
+bool DRMLibLoader::Open(const char *lib_name) {
+  lib_ = ::dlopen(lib_name, RTLD_NOW);
+
+  return (lib_ != nullptr);
+}
+
+bool DRMLibLoader::Sym(const char *func_name, void **func_ptr) {
+  if (lib_) {
+    *func_ptr = ::dlsym(lib_, func_name);
+  }
+
+  return (*func_ptr != nullptr);
+}
+
+}  // namespace drm_utils