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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
//
// This test uses new symbols that were not defined in the libc++ shipped on
// darwin11 and darwin12:
// XFAIL: with_system_cxx_lib=x86_64-apple-darwin11
// XFAIL: with_system_cxx_lib=x86_64-apple-darwin12
// <memory>
// shared_ptr
// template <class T>
// bool
// atomic_compare_exchange_strong(shared_ptr<T>* p, shared_ptr<T>* v,
// shared_ptr<T> w);
#include <memory>
#include <cassert>
int main()
{
#if __has_feature(cxx_atomic)
{
std::shared_ptr<int> p(new int(4));
std::shared_ptr<int> v(new int(3));
std::shared_ptr<int> w(new int(2));
bool b = std::atomic_compare_exchange_strong(&p, &v, w);
assert(b == false);
assert(*p == 4);
assert(*v == 4);
assert(*w == 2);
}
{
std::shared_ptr<int> p(new int(4));
std::shared_ptr<int> v = p;
std::shared_ptr<int> w(new int(2));
bool b = std::atomic_compare_exchange_strong(&p, &v, w);
assert(b == true);
assert(*p == 2);
assert(*v == 4);
assert(*w == 2);
}
#endif
}
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