42 lines
954 B
C++
42 lines
954 B
C++
template <typename T>
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class threadsafe_queue {
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private:
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std::unique_ptr<node> try_pop_head()
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{
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std::lock_guard<std::mutex> head_lock(head_mutex);
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if (head.get() == get_tail()) {
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return std::unique_ptr<node>();
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}
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return pop_head();
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}
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std::unique_ptr<node> try_pop_head(T& value)
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{
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std::lock_guard<std::mutex> head_lock(head_mutex);
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if (head.get() == get_tail()) {
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return std::unique_ptr<node>();
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}
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value = std::move(*head->data);
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return pop_head();
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}
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public:
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std::shared_ptr<T> try_pop()
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{
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std::unique_ptr<node> const old_head = try_pop_head();
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return old_head ? old_head->data : std::shared_ptr<T>();
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}
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bool try_pop(T& value)
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{
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std::unique_ptr<node> const old_head = try_pop_head(value);
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return old_head;
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}
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void empty()
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{
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std::lock_guard<std::mutex> head_lock(head_mutex);
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return (head == get_tail());
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}
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};
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