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 // This test uses new symbols that were not defined in the libc++ shipped on 11 // darwin11 and darwin12: 12 // XFAIL: with_system_lib=x86_64-apple-darwin11 13 // XFAIL: with_system_lib=x86_64-apple-darwin12 14 15 // <memory> 16 17 // shared_ptr 18 19 // template <class T> 20 // bool 21 // atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, 22 // shared_ptr<T> w); 23 24 #include <memory> 25 #include <cassert> 26 27 int main() 28 { 29 #if __has_feature(cxx_atomic) 30 { 31 std::shared_ptr<int> p(new int(4)); 32 std::shared_ptr<int> v(new int(3)); 33 std::shared_ptr<int> w(new int(2)); 34 bool b = std::atomic_compare_exchange_weak(&p, &v, w); 35 assert(b == false); 36 assert(*p == 4); 37 assert(*v == 4); 38 assert(*w == 2); 39 } 40 { 41 std::shared_ptr<int> p(new int(4)); 42 std::shared_ptr<int> v = p; 43 std::shared_ptr<int> w(new int(2)); 44 bool b = std::atomic_compare_exchange_weak(&p, &v, w); 45 assert(b == true); 46 assert(*p == 2); 47 assert(*v == 4); 48 assert(*w == 2); 49 } 50 #endif 51 } 52