59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
#include <mutex>
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#include <condition_variable>
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#include <queue>
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template<typename T>
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class threadsafe_queue
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{
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private:
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std::mutex mut;
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std::queue<T> data_queue;
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std::condition_variable data_cond;
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public:
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void push(T new_value)
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{
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std::lock_guard<std::mutex> lk(mut);
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data_queue.push(new_value);
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data_cond.notify_one();
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}
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void wait_and_pop(T& value)
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{
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std::unique_lock<std::mutex> lk(mut);
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data_cond.wait(lk,[this]{return !data_queue.empty();});
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value=data_queue.front();
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data_queue.pop();
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}
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};
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struct data_chunk
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{};
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data_chunk prepare_data();
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bool more_data_to_prepare();
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void process(data_chunk);
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bool is_last_chunk(data_chunk);
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threadsafe_queue<data_chunk> data_queue;
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void data_preparation_thread()
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{
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while(more_data_to_prepare())
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{
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data_chunk const data=prepare_data();
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data_queue.push(data);
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}
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}
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void data_processing_thread()
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{
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while(true)
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{
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data_chunk data;
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data_queue.wait_and_pop(data);
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process(data);
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if(is_last_chunk(data))
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break;
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}
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}
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