libcxx/include/__algorithm/pstl_backends/cpu_backends/backend.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKEND_BACKEND_H
  10 #define _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKEND_BACKEND_H
  11
  12 #include <__config>
  13 #include <cstddef>
  14
  15 #if defined(_LIBCPP_PSTL_CPU_BACKEND_SERIAL)
  16 #  include <__algorithm/pstl_backends/cpu_backends/serial.h>
  17 #elif defined(_LIBCPP_PSTL_CPU_BACKEND_THREAD)
  18 #  include <__algorithm/pstl_backends/cpu_backends/thread.h>
  19 #elif defined(_LIBCPP_PSTL_CPU_BACKEND_LIBDISPATCH)
  20 #  include <__algorithm/pstl_backends/cpu_backends/libdispatch.h>
  21 #else
  22 #  error "Invalid CPU backend choice"
  23 #endif
  24
  25 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  26 #  pragma GCC system_header
  27 #endif
  28
  29 #if _LIBCPP_STD_VER >= 17
  30
  31 _LIBCPP_BEGIN_NAMESPACE_STD
  32
  33 struct __cpu_backend_tag {};
  34
  35 inline constexpr size_t __lane_size = 64;
  36
  37 _LIBCPP_END_NAMESPACE_STD
  38
  39 #endif // _LIBCPP_STD_VER >= 17
  40
  41 #endif // _LIBCPP___ALGORITHM_PSTL_BACKENDS_CPU_BACKEND_BACKEND_H