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 38 12 13 // <atomic> 14 15 // template <class T> 16 // bool 17 // atomic_compare_exchange_strong_explicit(volatile atomic<T>* obj, T* expc, 18 // T desr, 19 // memory_order s, memory_order f); 20 // 21 // template <class T> 22 // bool 23 // atomic_compare_exchange_strong_explicit(atomic<T>* obj, T* expc, T desr, 24 // memory_order s, memory_order f); 25 26 #include <atomic> 27 #include <type_traits> 28 #include <cassert> 29 30 #include "atomic_helpers.h" 31 32 template <class T> 33 struct TestFn { 34 void operator()() const { 35 { 36 typedef std::atomic<T> A; 37 A a; 38 T t(T(1)); 39 std::atomic_init(&a, t); 40 assert(std::atomic_compare_exchange_strong_explicit(&a, &t, T(2), 41 std::memory_order_seq_cst, std::memory_order_seq_cst) == true); 42 assert(a == T(2)); 43 assert(t == T(1)); 44 assert(std::atomic_compare_exchange_strong_explicit(&a, &t, T(3), 45 std::memory_order_seq_cst, std::memory_order_seq_cst) == false); 46 assert(a == T(2)); 47 assert(t == T(2)); 48 } 49 { 50 typedef std::atomic<T> A; 51 volatile A a; 52 T t(T(1)); 53 std::atomic_init(&a, t); 54 assert(std::atomic_compare_exchange_strong_explicit(&a, &t, T(2), 55 std::memory_order_seq_cst, std::memory_order_seq_cst) == true); 56 assert(a == T(2)); 57 assert(t == T(1)); 58 assert(std::atomic_compare_exchange_strong_explicit(&a, &t, T(3), 59 std::memory_order_seq_cst, std::memory_order_seq_cst) == false); 60 assert(a == T(2)); 61 assert(t == T(2)); 62 } 63 } 64 }; 65 66 int main() 67 { 68 TestEachAtomicType<TestFn>()(); 69 } 70
