CASDefine.h

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// Copyright 2024 libsese
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#pragma once
#include <sese/Config.h>
 
namespace sese::concurrent {
 
template<typename T>
struct Node {
    T value{};
    Node *next{nullptr};
};
} // namespace sese::concurrent
 
extern "C" inline bool compareAndSwapPointer(void *volatile *object, void *oldValue, void *newValue) noexcept;
 
#ifdef _MSC_VER
bool compareAndSwapPointer(void *volatile *object, void *oldValue, void *newValue) noexcept {
    InterlockedCompareExchangePointer(object, newValue, oldValue);
    return *object == newValue;
}
#else
bool compareAndSwapPointer(void *volatile *object, void *oldValue, void *newValue) noexcept {
    return __sync_bool_compare_and_swap(object, oldValue, newValue);
}
#endif