1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 //#define LOG_NDEBUG 0 18 #define LOG_TAG "Drm" 19 #include <utils/Log.h> 20 #include <media/stagefright/foundation/ADebug.h> 21 22 #include <dlfcn.h> 23 24 #include "SharedLibrary.h" 25 26 namespace android { 27 28 SharedLibrary::SharedLibrary(const String8 &path) { 29 mLibHandle = dlopen(path.string(), RTLD_NOW); 30 } 31 32 SharedLibrary::~SharedLibrary() { 33 if (mLibHandle != NULL) { 34 dlclose(mLibHandle); 35 mLibHandle = NULL; 36 } 37 } 38 39 bool SharedLibrary::operator!() const { 40 return mLibHandle == NULL; 41 } 42 43 void *SharedLibrary::lookup(const char *symbol) const { 44 if (!mLibHandle) { 45 return NULL; 46 } 47 return dlsym(mLibHandle, symbol); 48 } 49 50 const char *SharedLibrary::lastError() const { 51 const char *error = dlerror(); 52 return error ? error : "No errors or unknown error"; 53 } 54 55 }; 56
