libstdc++-v3/testsuite/29_atomics/atomic/requirements/compare_exchange_lowering.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2013-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <atomic>
  21 #include <testsuite_common_types.h>
  22
  23 #define TEST_ALL_ORDERS()                       \
  24   do {                                          \
  25     ORDER_TEST(std::memory_order_relaxed);      \
  26     ORDER_TEST(std::memory_order_consume);      \
  27     ORDER_TEST(std::memory_order_acquire);      \
  28     ORDER_TEST(std::memory_order_release);      \
  29     ORDER_TEST(std::memory_order_acq_rel);      \
  30     ORDER_TEST(std::memory_order_seq_cst);      \
  31   } while(0)
  32
  33 void test01()
  34 {
  35 #define ORDER_TEST(ORDER)                                               \
  36   do {                                                                  \
  37     __gnu_test::compare_exchange_order_lowering<ORDER> test;            \
  38     __gnu_cxx::typelist::apply_generator(test,                          \
  39                                          __gnu_test::integral_types::type()); \
  40   } while (0);
  41   TEST_ALL_ORDERS();
  42 #undef ORDER_TEST
  43
  44   enum e { a, b, c };
  45 #define ORDER_TEST(ORDER)                               \
  46   do {                                                  \
  47     std::atomic<e> x(a);                                \
  48     e expected = a;                                     \
  49     x.compare_exchange_strong(expected, b, ORDER);      \
  50     x.compare_exchange_weak(expected, c, ORDER);        \
  51   } while (0);
  52   TEST_ALL_ORDERS();
  53 #undef ORDER_TEST
  54
  55 #define ORDER_TEST(ORDER)                       \
  56   do {                                          \
  57     std::atomic<void*> x(nullptr);              \
  58     void* expected = nullptr;                   \
  59     x.compare_exchange_strong(expected, nullptr, ORDER);        \
  60     x.compare_exchange_weak(expected, nullptr, ORDER);          \
  61   } while (0);
  62   TEST_ALL_ORDERS();
  63 #undef ORDER_TEST
  64 }