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93 lines
2.7 KiB
93 lines
2.7 KiB
/*
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* Copyright (c) 2017, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <dlfcn.h>
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#include "drm_lib_loader.h"
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#define __CLASS__ "DRMLibLoader"
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using std::mutex;
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using std::lock_guard;
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namespace drm_utils {
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DRMLibLoader *DRMLibLoader::s_instance = nullptr;
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mutex DRMLibLoader::s_lock;
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DRMLibLoader *DRMLibLoader::GetInstance() {
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lock_guard<mutex> obj(s_lock);
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if (!s_instance) {
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s_instance = new DRMLibLoader();
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}
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return s_instance;
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}
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void DRMLibLoader::Destroy() {
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lock_guard<mutex> obj(s_lock);
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if (s_instance) {
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delete s_instance;
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s_instance = nullptr;
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}
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}
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DRMLibLoader::DRMLibLoader() {
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if (Open("libsdedrm.so")) {
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if (Sym("GetDRMManager", reinterpret_cast<void **>(&func_get_drm_manager_)) &&
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Sym("DestroyDRMManager", reinterpret_cast<void **>(&func_destroy_drm_manager_))) {
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is_loaded_ = true;
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}
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}
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}
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DRMLibLoader::~DRMLibLoader() {
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if (lib_) {
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::dlclose(lib_);
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lib_ = nullptr;
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}
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}
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bool DRMLibLoader::Open(const char *lib_name) {
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lib_ = ::dlopen(lib_name, RTLD_NOW);
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return (lib_ != nullptr);
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}
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bool DRMLibLoader::Sym(const char *func_name, void **func_ptr) {
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if (lib_) {
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*func_ptr = ::dlsym(lib_, func_name);
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}
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return (*func_ptr != nullptr);
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}
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} // namespace drm_utils
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