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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
* Copyright (C) 2017 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.
*/
#ifndef __NEURAL_NETWORKS_LOAD_HELPER_H__
#define __NEURAL_NETWORKS_LOAD_HELPER_H__
#include <dlfcn.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#define NNAPI_LOG(format, ...) printf(format "\n", __VA_ARGS__);
#define LOAD_FUNCTION(name) \
static name##_fn fn = reinterpret_cast<name##_fn>(loadNNAPIFunction(#name));
#define EXECUTE_FUNCTION(...) \
if (fn != nullptr) { \
fn(__VA_ARGS__); \
}
#define EXECUTE_FUNCTION_RETURN(...) return fn != nullptr ? fn(__VA_ARGS__) : 0;
inline void* loadNNAPILibrary(const char* name) {
// TODO: change RTLD_LOCAL? Assumes there can be multiple instances of nn
// api RT
void* handle = dlopen(name, RTLD_LAZY | RTLD_LOCAL);
if (handle == nullptr) {
NNAPI_LOG("nnapi error: unable to open library %s", name);
}
return handle;
}
inline void* getNNAPILibraryHandle() {
static void* handle = loadNNAPILibrary("libneuralnetworks.so");
return handle;
}
inline void* loadNNAPIFunction(const char* name) {
void* fn = nullptr;
if (getNNAPILibraryHandle() != nullptr) {
fn = dlsym(getNNAPILibraryHandle(), name);
}
if (fn == nullptr)
{
NNAPI_LOG("nnapi error: unable to open function %s", name);
abort();
}
else
{
#ifdef _GNU_SOURCE
Dl_info info;
dladdr(fn, &info);
NNAPI_LOG("nnapi function '%s' is loaded from '%s' ", name, info.dli_fname);
#endif // _GNU_SOURCE
}
return fn;
}
inline bool NNAPIExists() {
static bool nnapi_is_available = getNNAPILibraryHandle();
return nnapi_is_available;
}
#endif // __NEURAL_NETWORKS_LOAD_HELPER_H__
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