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79 lines
2.3 KiB
79 lines
2.3 KiB
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "APM_EngineLoader"
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#include <dlfcn.h>
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#include <utils/Log.h>
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#include "EngineLibrary.h"
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namespace android {
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// static
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std::shared_ptr<EngineLibrary> EngineLibrary::load(std::string libraryPath)
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{
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std::shared_ptr<EngineLibrary> engLib(new EngineLibrary());
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return engLib->init(std::move(libraryPath)) ? engLib : nullptr;
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}
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EngineLibrary::~EngineLibrary()
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{
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close();
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}
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bool EngineLibrary::init(std::string libraryPath)
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{
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mLibraryHandle = dlopen(libraryPath.c_str(), 0);
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if (mLibraryHandle == nullptr) {
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ALOGE("Could not dlopen %s: %s", libraryPath.c_str(), dlerror());
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return false;
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}
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mCreateEngineInstance = (EngineInterface* (*)())dlsym(mLibraryHandle, "createEngineInstance");
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mDestroyEngineInstance = (void (*)(EngineInterface*))dlsym(
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mLibraryHandle, "destroyEngineInstance");
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if (mCreateEngineInstance == nullptr || mDestroyEngineInstance == nullptr) {
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ALOGE("Could not find engine interface functions in %s", libraryPath.c_str());
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close();
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return false;
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}
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ALOGD("Loaded engine from %s", libraryPath.c_str());
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return true;
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}
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EngineInstance EngineLibrary::createEngine()
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{
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if (mCreateEngineInstance == nullptr || mDestroyEngineInstance == nullptr) {
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return EngineInstance();
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}
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return EngineInstance(mCreateEngineInstance(),
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[lib = shared_from_this(), destroy = mDestroyEngineInstance] (EngineInterface* e) {
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destroy(e);
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});
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}
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void EngineLibrary::close()
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{
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if (mLibraryHandle != nullptr) {
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dlclose(mLibraryHandle);
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}
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mLibraryHandle = nullptr;
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mCreateEngineInstance = nullptr;
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mDestroyEngineInstance = nullptr;
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}
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} // namespace android
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