| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "android.hardware.cas@1.1-SharedLibrary" |
| |
| #include "SharedLibrary.h" |
| #include <dlfcn.h> |
| #include <media/stagefright/foundation/ADebug.h> |
| #include <utils/Log.h> |
| |
| namespace android { |
| namespace hardware { |
| namespace cas { |
| namespace V1_1 { |
| namespace implementation { |
| |
| SharedLibrary::SharedLibrary(const String8& path) { |
| mLibHandle = dlopen(path.string(), RTLD_NOW); |
| } |
| |
| SharedLibrary::~SharedLibrary() { |
| if (mLibHandle != NULL) { |
| dlclose(mLibHandle); |
| mLibHandle = NULL; |
| } |
| } |
| |
| bool SharedLibrary::operator!() const { |
| return mLibHandle == NULL; |
| } |
| |
| void* SharedLibrary::lookup(const char* symbol) const { |
| if (!mLibHandle) { |
| return NULL; |
| } |
| // Clear last error before we load the symbol again, |
| // in case the caller didn't retrieve it. |
| (void)dlerror(); |
| return dlsym(mLibHandle, symbol); |
| } |
| |
| const char* SharedLibrary::lastError() const { |
| const char* error = dlerror(); |
| return error ? error : "No errors or unknown error"; |
| } |
| |
| } // namespace implementation |
| } // namespace V1_1 |
| } // namespace cas |
| } // namespace hardware |
| } // namespace android |