sources/cxx-stl/llvm-libc++/test/std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     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

// <atomic>

// template <class T>
//     bool
//     atomic_is_lock_free(const volatile atomic<T>* obj);
// 
// template <class T>
//     bool
//     atomic_is_lock_free(const atomic<T>* obj);

#include <atomic>
#include <cassert>

#include "atomic_helpers.h"

template <class T>
struct TestFn {
  void operator()() const {
    typedef std::atomic<T> A;
    A t;
    bool b1 = std::atomic_is_lock_free(static_cast<const A*>(&t));
    volatile A vt;
    bool b2 = std::atomic_is_lock_free(static_cast<const volatile A*>(&vt));
    assert(b1 == b2);
  }
};

struct A
{
    char _[4];
};

int main()
{
    TestFn<A>()();
    TestEachAtomicType<TestFn>()();
}