Howard Hinnant | 4777bf2 | 2010-12-06 23:10:08 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
Jonathan Roelofs | 8d86b2e | 2014-09-05 19:45:05 +0000 | [diff] [blame] | 9 | // |
| 10 | // UNSUPPORTED: libcpp-has-no-threads |
| 11 | // ... assertion fails line 32 |
Howard Hinnant | 4777bf2 | 2010-12-06 23:10:08 +0000 | [diff] [blame] | 12 | |
| 13 | // <atomic> |
| 14 | |
| 15 | // template <class T> |
| 16 | // T |
| 17 | // atomic_exchange_explicit(volatile atomic<T>* obj, T desr, memory_order m); |
| 18 | // |
| 19 | // template <class T> |
| 20 | // T |
| 21 | // atomic_exchange_explicit(atomic<T>* obj, T desr, memory_order m); |
| 22 | |
| 23 | #include <atomic> |
Richard Smith | 9efdc0b | 2012-04-19 00:50:47 +0000 | [diff] [blame] | 24 | #include <type_traits> |
Howard Hinnant | 4777bf2 | 2010-12-06 23:10:08 +0000 | [diff] [blame] | 25 | #include <cassert> |
| 26 | |
Eric Fiselier | 00f4a49 | 2015-08-19 17:21:46 +0000 | [diff] [blame^] | 27 | #include "atomic_helpers.h" |
| 28 | |
Howard Hinnant | 4777bf2 | 2010-12-06 23:10:08 +0000 | [diff] [blame] | 29 | template <class T> |
Eric Fiselier | 00f4a49 | 2015-08-19 17:21:46 +0000 | [diff] [blame^] | 30 | struct TestFn { |
| 31 | void operator()() const { |
Howard Hinnant | 4777bf2 | 2010-12-06 23:10:08 +0000 | [diff] [blame] | 32 | typedef std::atomic<T> A; |
| 33 | A t; |
| 34 | std::atomic_init(&t, T(1)); |
| 35 | assert(std::atomic_exchange_explicit(&t, T(2), std::memory_order_seq_cst) |
| 36 | == T(1)); |
| 37 | assert(t == T(2)); |
| 38 | volatile A vt; |
| 39 | std::atomic_init(&vt, T(3)); |
| 40 | assert(std::atomic_exchange_explicit(&vt, T(4), std::memory_order_seq_cst) |
| 41 | == T(3)); |
| 42 | assert(vt == T(4)); |
Eric Fiselier | 00f4a49 | 2015-08-19 17:21:46 +0000 | [diff] [blame^] | 43 | } |
Howard Hinnant | 4777bf2 | 2010-12-06 23:10:08 +0000 | [diff] [blame] | 44 | }; |
| 45 | |
Eric Fiselier | 00f4a49 | 2015-08-19 17:21:46 +0000 | [diff] [blame^] | 46 | |
Howard Hinnant | 4777bf2 | 2010-12-06 23:10:08 +0000 | [diff] [blame] | 47 | int main() |
| 48 | { |
Eric Fiselier | 00f4a49 | 2015-08-19 17:21:46 +0000 | [diff] [blame^] | 49 | TestEachAtomicType<TestFn>()(); |
Howard Hinnant | 4777bf2 | 2010-12-06 23:10:08 +0000 | [diff] [blame] | 50 | } |