50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
template<typename T>
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class threadsafe_queue
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{
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private:
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node* get_tail()
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{
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std::lock_guard<std::mutex> tail_lock(tail_mutex);
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return tail;
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}
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std::unique_ptr<node> pop_head()
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{
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std::unique_ptr<node> const old_head=std::move(head);
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head=std::move(old_head->next);
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return old_head;
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}
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std::unique_lock<std::mutex> wait_for_data()
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{
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std::unique_lock<std::mutex> head_lock(head_mutex);
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data_cond.wait(head_lock,[&]{return head!=get_tail();});
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return std::move(head_lock);
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}
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std::unique_ptr<node> wait_pop_head()
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{
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std::unique_lock<std::mutex> head_lock(wait_for_data());
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return pop_head();
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}
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std::unique_ptr<node> wait_pop_head(T& value)
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{
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std::unique_lock<std::mutex> head_lock(wait_for_data());
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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> wait_and_pop()
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{
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std::unique_ptr<node> const old_head=wait_pop_head();
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return old_head->data;
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}
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void wait_and_pop(T& value)
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{
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std::unique_ptr<node> const old_head=wait_pop_head(value);
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}
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};
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