| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // UNSUPPORTED: libcpp-has-no-threads |
| |
| // <atomic> |
| |
| // struct atomic_flag |
| |
| // bool atomic_flag_test_and_set_explicit(volatile atomic_flag*, memory_order); |
| // bool atomic_flag_test_and_set_explicit(atomic_flag*, memory_order); |
| |
| #include <atomic> |
| #include <cassert> |
| |
| int main() |
| { |
| { |
| std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_relaxed) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_consume) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_acquire) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_release) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_acq_rel) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_seq_cst) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| volatile std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_relaxed) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| volatile std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_consume) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| volatile std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_acquire) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| volatile std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_release) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| volatile std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_acq_rel) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| { |
| volatile std::atomic_flag f; |
| f.clear(); |
| assert(atomic_flag_test_and_set_explicit(&f, std::memory_order_seq_cst) == 0); |
| assert(f.test_and_set() == 1); |
| } |
| } |