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Standard Output

If only one thread writes to standard output, it suffices to bind the thread to any process   

rt_bind();
cout << "data " << data << "{n";
rt_unbind();

However, if multiple threads write to standard output, it does not suffice to bind a thread to a specific process. We also have to guarantee that the process is not interrupted while performing the output operation, because otherwise another thread might interfere with its own output. Thus every thread (also the main thread) has to protect its output operations as follows   

rt_lock();
cout << "data " << data;
rt_unlock();