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 // <atomic> 13 14 // template <class T> 15 // bool 16 // atomic_is_lock_free(const volatile atomic<T>* obj); 17 // 18 // template <class T> 19 // bool 20 // atomic_is_lock_free(const atomic<T>* obj); 21 22 #include <atomic> 23 #include <cassert> 24 25 #include "atomic_helpers.h" 26 27 template <class T> 28 struct TestFn { 29 void operator()() const { 30 typedef std::atomic<T> A; 31 A t; 32 bool b1 = std::atomic_is_lock_free(static_cast<const A*>(&t)); 33 volatile A vt; 34 bool b2 = std::atomic_is_lock_free(static_cast<const volatile A*>(&vt)); 35 assert(b1 == b2); 36 } 37 }; 38 39 struct A 40 { 41 char _[4]; 42 }; 43 44 int main() 45 { 46 TestFn<A>()(); 47 TestEachAtomicType<TestFn>()(); 48 } 49
