1 /* 2 * Copyright (C) 2017 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 #include "cpp/rsDispatch.h" 18 #include "rsFallbackAdaptation.h" 19 20 #include <log/log.h> 21 #include <dlfcn.h> 22 23 #undef LOG_TAG 24 #define LOG_TAG "RenderScript Graphics Fallback" 25 26 dispatchTable RsFallbackAdaptation::mEntryFuncs; 27 RsFallbackAdaptation()28RsFallbackAdaptation::RsFallbackAdaptation() 29 { 30 void* handle = dlopen("libRS_internal.so", RTLD_LAZY | RTLD_LOCAL); 31 if (handle == NULL) { 32 ALOGE("couldn't dlopen %s.", dlerror()); 33 return; 34 } 35 if (loadSymbols(handle, mEntryFuncs) == false) { 36 // If dispatch table initialization failed, the dispatch table 37 // will be reset, and calling function pointers of uninitialized 38 // dispatch table will crash the application. 39 ALOGE("Fallback dispatch table init failed!"); 40 mEntryFuncs = {}; 41 dlclose(handle); 42 } 43 } 44 GetInstance()45RsFallbackAdaptation& RsFallbackAdaptation::GetInstance() 46 { 47 // This function-local-static guarantees the instance is a singleton. The 48 // constructor of RsHidlAdaptation will only be called when GetInstance is 49 // called for the first time. 50 static RsFallbackAdaptation instance; 51 return instance; 52 } 53 GetEntryFuncs()54const dispatchTable* RsFallbackAdaptation::GetEntryFuncs() 55 { 56 return &mEntryFuncs; 57 } 58 59