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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
*
* 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.
*/
/**
* @file benchmark.h
* @ingroup COM_AI_RUNTIME
* @brief This file contains nnfw::misc::benchmark::Accumulator class
*/
#ifndef __NNFW_MISC_BENCHMARK_H__
#define __NNFW_MISC_BENCHMARK_H__
#include <chrono>
namespace nnfw
{
namespace misc
{
// Benckmark support
namespace benchmark
{
/**
* @brief Class to accumulate time during benchmark
*/
template <typename T> class Accumulator
{
public:
/**
* @brief Construct a new Accumulator object
* @param[in] ref Object to keep time duration
*/
Accumulator(T &ref) : _ref(ref)
{
// DO NOTHING
}
public:
/**
* @brief Return the reference of @c ref passed to constructor
* @return Reference of @c ref
*/
T &operator()(void) { return _ref; }
private:
T &_ref;
};
/**
* @brief Run passed function and returns accumulated time
* @tparam T Period used by @c std::chrono::duration_cast
* @tparam Callable Function type to benchmark
* @param[in] acc Accumulated time after running @cb
* @param[in] cb Function to run and benchmark
* @return Accumulated time
*/
template <typename T, typename Callable>
Accumulator<T> &operator<<(Accumulator<T> &&acc, Callable cb)
{
auto begin = std::chrono::steady_clock::now();
cb();
auto end = std::chrono::steady_clock::now();
acc() += std::chrono::duration_cast<T>(end - begin);
return acc;
}
template <typename T> Accumulator<T> measure(T &out) { return Accumulator<T>(out); }
} // namespace benchmark
} // namespace misc
} // namespace nnfw
#endif // __NNFW_MISC_BENCHMARK_H__
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