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 #include <atomic> 11 12 template <class A, class T> 13 bool cmpxchg_weak_loop(A& atomic, T& expected, T desired) { 14 for (int i = 0; i < 10; i++) { 15 if (atomic.compare_exchange_weak(expected, desired) == true) { 16 return true; 17 } 18 } 19 20 return false; 21 } 22 23 template <class A, class T> 24 bool cmpxchg_weak_loop(A& atomic, T& expected, T desired, 25 std::memory_order success, 26 std::memory_order failure) { 27 for (int i = 0; i < 10; i++) { 28 if (atomic.compare_exchange_weak(expected, desired, success, 29 failure) == true) { 30 return true; 31 } 32 } 33 34 return false; 35 } 36 37 template <class A, class T> 38 bool c_cmpxchg_weak_loop(A* atomic, T* expected, T desired) { 39 for (int i = 0; i < 10; i++) { 40 if (std::atomic_compare_exchange_weak(atomic, expected, desired) == true) { 41 return true; 42 } 43 } 44 45 return false; 46 } 47 48 template <class A, class T> 49 bool c_cmpxchg_weak_loop(A* atomic, T* expected, T desired, 50 std::memory_order success, 51 std::memory_order failure) { 52 for (int i = 0; i < 10; i++) { 53 if (std::atomic_compare_exchange_weak_explicit(atomic, expected, desired, 54 success, failure) == true) { 55 return true; 56 } 57 } 58 59 return false; 60 } 61
