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 //===----------------------------------------------------------------------===// 9 // 10 // UNSUPPORTED: libcpp-has-no-threads 11 // ... assertion fails line 32 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> 24 #include <type_traits> 25 #include <cassert> 26 27 #include "atomic_helpers.h" 28 29 template <class T> 30 struct TestFn { 31 void operator()() const { 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)); 43 } 44 }; 45 46 47 int main() 48 { 49 TestEachAtomicType<TestFn>()(); 50 } 51
