worldInfo.hpp

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// -------------------------------------------------------//
//
// SHAMROCK code for hydrodynamics
// Copyright (c) 2021-2026 Timothée David--Cléris <tim.shamrock@proton.me>
// SPDX-License-Identifier: CeCILL Free Software License Agreement v2.1
// Shamrock is licensed under the CeCILL 2.1 License, see LICENSE for more information
//
// -------------------------------------------------------//
 
#pragma once
 
#include "shambase/aliases_int.hpp"
#include <string>
 
namespace shamcomm {
 
    i32 world_rank();
 
    i32 world_size();
 
    i32 mpi_max_tag_value();
 
    std::string mpi_process_name();
 
    void fetch_world_info();
 
    bool is_mpi_initialized();
 
} // namespace shamcomm
 
#define ON_RANK_0(x)                                                                               \
    do {                                                                                           \
        if (shamcomm::world_rank() == 0) {                                                         \
            x;                                                                                     \
        }                                                                                          \
    } while (false)