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 // 12 // This test uses new symbols that were not defined in the libc++ shipped on 13 // darwin11 and darwin12: 14 // XFAIL: availability=macosx10.7 15 // XFAIL: availability=macosx10.8 16 17 // <memory> 18 19 // shared_ptr 20 21 // template <class T> 22 // bool 23 // atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 24 // shared_ptr<T> w, memory_order success, 25 // memory_order failure); 26 27 // UNSUPPORTED: c++98, c++03 28 29 #include <memory> 30 #include <cassert> 31 32 #include "test_macros.h" 33 34 int main() 35 { 36 { 37 std::shared_ptr<int> p(new int(4)); 38 std::shared_ptr<int> v(new int(3)); 39 std::shared_ptr<int> w(new int(2)); 40 bool b = std::atomic_compare_exchange_strong_explicit(&p, &v, w, 41 std::memory_order_seq_cst, 42 std::memory_order_seq_cst); 43 assert(b == false); 44 assert(*p == 4); 45 assert(*v == 4); 46 assert(*w == 2); 47 } 48 { 49 std::shared_ptr<int> p(new int(4)); 50 std::shared_ptr<int> v = p; 51 std::shared_ptr<int> w(new int(2)); 52 bool b = std::atomic_compare_exchange_strong_explicit(&p, &v, w, 53 std::memory_order_seq_cst, 54 std::memory_order_seq_cst); 55 assert(b == true); 56 assert(*p == 2); 57 assert(*v == 4); 58 assert(*w == 2); 59 } 60 } 61
