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write-and-reader-priority
- (1)任意多的读进程可以同时读这个文件; (2)一次只允许一个写进程往文件中写; (3)如果一个写进程正在往文件中写,禁止任何读进程或写进程访问文件; (4)写进程执行写操作前,应让已有的写者或读者全部退出。这说明当有读者在读文件时不允许写者写文件。-(A) any number of reading processes can simultaneously read the file (2) allows only one process to write the file to
re
- OS多个实验要求,包括作业调度,进程调度等。-Multiple OS experimental requirements, including job scheduling, process scheduling.