- 419 名前：デフォルトの名無しさん mailto:sage [2023/03/18(土) 00:11:15.51 ID:6kQD14Ek.net]
- ChatGPT先生に聞いてみた
>>404の言う通り
template <typename T>
class LockFreeStack {
public:
void push(const T& value) {
Node* new_node = new Node(value);
new_node->next = head.load(std::memory_order_relaxed);
while (!head.compare_exchange_weak(new_node->next, new_node,
std::memory_order_release,
std::memory_order_relaxed));
}
std::shared_ptr<T> pop() {
Node* old_head = head.load(std::memory_order_relaxed);
while (old_head && !head.compare_exchange_weak(old_head, old_head->next,
std::memory_order_acquire,
std::memory_order_relaxed));
return old_head ? std::make_shared<T>(old_head->value) : nullptr;
}
private:
struct Node {
T value;
Node* next;
Node(const T& value) : value(value), next(nullptr) {}
};
std::atomic<Node*> head{nullptr};
};
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