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60 lines
1.8 KiB
60 lines
1.8 KiB
4 months ago
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <atomic>
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template <class A>
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bool cmpxchg_weak_loop(A& atomic, typename A::value_type& expected, typename A::value_type desired) {
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for (int i = 0; i < 10; i++) {
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if (atomic.compare_exchange_weak(expected, desired) == true) {
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return true;
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}
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}
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return false;
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}
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template <class A>
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bool cmpxchg_weak_loop(A& atomic, typename A::value_type& expected, typename A::value_type desired,
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std::memory_order success,
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std::memory_order failure) {
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for (int i = 0; i < 10; i++) {
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if (atomic.compare_exchange_weak(expected, desired, success,
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failure) == true) {
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return true;
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}
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}
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return false;
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}
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template <class A>
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bool c_cmpxchg_weak_loop(A* atomic, typename A::value_type* expected, typename A::value_type desired) {
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for (int i = 0; i < 10; i++) {
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if (std::atomic_compare_exchange_weak(atomic, expected, desired) == true) {
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return true;
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}
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}
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return false;
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}
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template <class A>
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bool c_cmpxchg_weak_loop(A* atomic, typename A::value_type* expected, typename A::value_type desired,
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std::memory_order success,
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std::memory_order failure) {
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for (int i = 0; i < 10; i++) {
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if (std::atomic_compare_exchange_weak_explicit(atomic, expected, desired,
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success, failure) == true) {
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return true;
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}
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}
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return false;
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}
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