(How to advance the reliability and real-time performance of network communication has become an important issue. Now in WindowsNT, the use of program network interface is widely used for network programming. It works at the user layer of the operating system. In the preemptive multitasking scheduling mechanism of the Windows system, the office level is low, and it is easily affected by the system task scheduling, so it cannot meet the Strict reliability and timeliness requirements in engineering.)
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