libstdc++-v3/testsuite/29_atomics/atomic_integral/is_always_lock_free.cc

   1 // Copyright (C) 2016-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do compile { target c++17 } }
  19
  20 #include <atomic>
  21
  22 using std::atomic;
  23
  24 template<typename T>
  25 constexpr bool check(int macro)
  26 {
  27   return std::atomic<T>::is_always_lock_free == (macro == 2);
  28 }
  29
  30 static_assert( check<bool>(ATOMIC_BOOL_LOCK_FREE) );
  31 static_assert( check<char>(ATOMIC_CHAR_LOCK_FREE) );
  32 static_assert( check<signed char>(ATOMIC_CHAR_LOCK_FREE) );
  33 static_assert( check<unsigned char>(ATOMIC_CHAR_LOCK_FREE) );
  34 static_assert( check<int>(ATOMIC_INT_LOCK_FREE) );
  35 static_assert( check<unsigned int>(ATOMIC_INT_LOCK_FREE) );
  36 static_assert( check<long>(ATOMIC_LONG_LOCK_FREE) );
  37 static_assert( check<unsigned long>(ATOMIC_LONG_LOCK_FREE) );
  38 static_assert( check<long long>(ATOMIC_LLONG_LOCK_FREE) );
  39 static_assert( check<unsigned long long>(ATOMIC_LLONG_LOCK_FREE) );
  40 static_assert( check<wchar_t>(ATOMIC_WCHAR_T_LOCK_FREE) );
  41 #ifdef _GLIBCXX_USE_CHAR8_T
  42 static_assert( check<char8_t>(ATOMIC_CHAR8_T_LOCK_FREE) );
  43 #endif
  44 static_assert( check<char16_t>(ATOMIC_CHAR16_T_LOCK_FREE) );
  45 static_assert( check<char32_t>(ATOMIC_CHAR32_T_LOCK_FREE) );