libstdc++-v3/include/std/execution

// <execution> -*- C++ -*-

// Copyright (C) 2018-2026 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

#ifndef _GLIBCXX_EXECUTION
#define _GLIBCXX_EXECUTION 1

#ifdef _GLIBCXX_SYSHDR
#pragma GCC system_header
#endif

#include <bits/requires_hosted.h> // execution policies are hosted only

#define __glibcxx_want_parallel_algorithm
#define __glibcxx_want_execution
#include <bits/version.h>

// C++ >= 17 && HOSTED
#if defined(__cpp_lib_parallel_algorithm) || defined(__cpp_lib_execution)
# include <bits/c++config.h>
# include <pstl/glue_execution_defs.h>

# define _PSTL_EXECUTION_POLICIES_DEFINED 1

// Algorithm implementation
# if _PSTL_ALGORITHM_FORWARD_DECLARED
#  include <pstl/glue_algorithm_impl.h>
# endif

// Numeric implementation
# if _PSTL_NUMERIC_FORWARD_DECLARED
#  include <pstl/glue_numeric_impl.h>
# endif

// Memory implementation
# if _PSTL_NUMERIC_FORWARD_DECLARED
#  include <pstl/glue_memory_impl.h>
# endif

#endif // C++17

#endif /* _GLIBCXX_EXECUTION */