65 lines
1.1 KiB
C++
65 lines
1.1 KiB
C++
#include <mutex>
|
|
#include <condition_variable>
|
|
#include <thread>
|
|
#include <queue>
|
|
|
|
bool more_data_to_prepare()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
struct data_chunk
|
|
{};
|
|
|
|
data_chunk prepare_data()
|
|
{
|
|
return data_chunk();
|
|
}
|
|
|
|
void process(data_chunk&)
|
|
{}
|
|
|
|
bool is_last_chunk(data_chunk&)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
std::mutex mut;
|
|
std::queue<data_chunk> data_queue;
|
|
std::condition_variable data_cond;
|
|
|
|
void data_preparation_thread()
|
|
{
|
|
while(more_data_to_prepare())
|
|
{
|
|
data_chunk const data=prepare_data();
|
|
std::lock_guard<std::mutex> lk(mut);
|
|
data_queue.push(data);
|
|
data_cond.notify_one();
|
|
}
|
|
}
|
|
|
|
void data_processing_thread()
|
|
{
|
|
while(true)
|
|
{
|
|
std::unique_lock<std::mutex> lk(mut);
|
|
data_cond.wait(lk,[]{return !data_queue.empty();});
|
|
data_chunk data=data_queue.front();
|
|
data_queue.pop();
|
|
lk.unlock();
|
|
process(data);
|
|
if(is_last_chunk(data))
|
|
break;
|
|
}
|
|
}
|
|
|
|
int main()
|
|
{
|
|
std::thread t1(data_preparation_thread);
|
|
std::thread t2(data_processing_thread);
|
|
|
|
t1.join();
|
|
t2.join();
|
|
}
|