text: // MIT License
  //
  // Copyright (c) 2020, The Regents of the University of California,
  // through Lawrence Berkeley National Laboratory (subject to receipt of any
  // required approvals from the U.S. Dept. of Energy).  All rights reserved.
  //
  // 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
  // copies of the Software, and to permit persons to whom the Software is
  // 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
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  
  /** \file backends/process.hpp
   * \headerfile backends/process.hpp "timemory/backends/process.hpp"
   * Defines process backend functions
   *
   */
  
  #pragma once
  
  #include "timemory/macros/os.hpp"
  #include "timemory/utility/macros.hpp"
  
  #include <cstdint>
  #include <cstdio>
  
  #if defined(TIMEMORY_UNIX)
  #    include <sys/resource.h>
  #    include <unistd.h>
  #    if defined(TIMEMORY_MACOS)
  #        include <libproc.h>
  #        include <mach/mach.h>
  #    endif
  #elif defined(TIMEMORY_WINDOWS)
  #    if !defined(NOMINMAX)
  #        define NOMINMAX
  #    endif
  #    if !defined(WIN32_LEAN_AND_MEAN)
  #        define WIN32_LEAN_AND_MEAN
  #    endif
  #    include <windows.h>
  #endif
  
  namespace tim
  {
  namespace process
  {
  //
  //--------------------------------------------------------------------------------------//
  //
  #if defined(TIMEMORY_UNIX)
  using id_t = pid_t;
  #elif defined(TIMEMORY_WINDOWS)
  using id_t = DWORD;
  #else
  using id_t = int;
  #endif
  //
  //--------------------------------------------------------------------------------------//
  //
  /// \fn pid_t tim::process::get_id()
  /// \brief get the process id of this process
  ///
  inline id_t
  get_id()
  {
  #if defined(TIMEMORY_WINDOWS)
      static auto instance = GetCurrentProcessId();
  #elif defined(TIMEMORY_UNIX)
      static auto instance = getpid();
  #else
      static auto instance = 0;
  #endif
      return instance;
  }
  //
  //--------------------------------------------------------------------------------------//
  //
  /// \fn pid_t& tim::process::get_target_id()
  /// \brief get the target process id of this process (may differ from process::get_id)
  ///
  inline id_t&
  get_target_id()
  {
  #if defined(TIMEMORY_WINDOWS)
      static auto instance = GetCurrentProcessId();
  #elif defined(TIMEMORY_UNIX)
      static auto instance = getpid();
  #else
      static auto instance = 0;
  #endif
      return instance;
  }
  //
  //--------------------------------------------------------------------------------------//
  //
  }  // namespace process
  }  // namespace tim
  