读者写者问题，共享原则如下：1、读/写互斥访问；2、写/写互斥访问；3、允许多个读者同时对文件进行访问。-semaphore rmutex=1,rwmutex=1 int count=0 Cobegin reader: writer:

The NFC Forum the “Type 2 Tag Operation” technical specification has been developed to describe how the reader/writer device (called NFC Forum device) can store/retrieve NDEF data on a Type 2 Tag platform. The NXP products MIFARE Ultralight MF0

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