utils.hpp

Go to the documentation of this file.

// Copyright (c) 2024 Simons Foundation
//
// 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.txt
//
// 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.
//
// Authors: Thomas Hahn, Alexander Hampel, Olivier Parcollet, Nils Wentzell
 
#pragma once
 
#include <mpi.h>
 
#include <stdexcept>
#include <string>
 
namespace mpi {
 
  namespace detail {
 
    // Helper struct to get the regular type of a type.
    template <typename T, typename Enable = void> struct _regular {
      using type = T;
    };
 
    // Spezialization of _regular for types with a `regular_type` type alias.
    template <typename T> struct _regular<T, std::void_t<typename T::regular_type>> {
      using type = typename T::regular_type;
    };
 
  } // namespace detail
 
  template <typename T> using regular_t = typename detail::_regular<std::decay_t<T>>::type;
 
  inline void check_mpi_call(int errcode, const std::string &mpi_routine) {
    if (errcode != MPI_SUCCESS) throw std::runtime_error("MPI error " + std::to_string(errcode) + " in MPI routine " + mpi_routine);
  }
 
  template <typename R>
  concept contiguous_sized_range = std::ranges::contiguous_range<R> && std::ranges::sized_range<R>;
 
} // namespace mpi