Implementation of Qt's QTcpSocket ReadyRead signal

Question

I want to know about Qt's implementation of QTcpSocket 's ReadyRead signal. How is it implemented on Windows and on Linux? Using select() , poll() , epoll() , SIGIO or any other way? How does QTcpSocket know when to emit a ReadyRead signal?

Answer 1

Since Qt is open-source, you can look at the source code directly, and see for yourself.

They even have it posted online .

The OS-specific parts are (I think) implemented in qnativesocketengine_unix.cpp and in qnativesocketengine_win.cpp .