utils.h

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/*
==============================================================================
MIT License
Copyright 2022 Institute for Automotive Engineering of RWTH Aachen University.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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SOFTWARE.
==============================================================================
*/
 
#pragma once
 
#include <stdexcept>
#include <string>
 
#include <tensorflow/core/platform/env.h>
#include <tensorflow/core/public/session.h>
 
 
namespace tensorflow_cpp {
 
 
namespace tf = tensorflow;
 
 
inline tf::SessionOptions makeSessionOptions(
  const bool allow_growth = true,
  const double per_process_gpu_memory_fraction = 0,
  const std::string& visible_device_list = "") {
 
  tf::SessionOptions options = tf::SessionOptions();
  tf::ConfigProto* config = &options.config;
  tf::GPUOptions* gpu_options = config->mutable_gpu_options();
  gpu_options->set_allow_growth(allow_growth);
  gpu_options->set_per_process_gpu_memory_fraction(
    per_process_gpu_memory_fraction);
  gpu_options->set_visible_device_list(visible_device_list);
 
  return options;
}
 
 
inline tf::Session* createSession(
  const bool allow_growth = true,
  const double per_process_gpu_memory_fraction = 0,
  const std::string& visible_device_list = "") {
 
  tf::Session* session;
  tf::SessionOptions options = makeSessionOptions(
    allow_growth, per_process_gpu_memory_fraction, visible_device_list);
  tf::Status status = tf::NewSession(options, &session);
  if (!status.ok())
    throw std::runtime_error("Failed to create new session: " +
                             status.ToString());
 
  return session;
}
 
 
}  // namespace tensorflow_cpp