#Linux file system reader and writer windows 10 keygen#
The first field is a positive integer, which represents the line program number. Each line of test data includes four fields, and each field is separated by spaces. The test data file includes n lines of test data, describing whether the created n threads are readers or writers, and the start time and duration of read and write operations. Operation result display requirements: It is required to display a line of prompt information when each thread is created, issue a read-write operation request, start a read-write operation, and end a read-write operation to ensure that all processing complies with the corresponding read-write operation restrictions.Additional restriction for writer priority: If a reader is applying for a read operation and another writer is waiting to access the shared resource, the reader must wait until no writer is in the waiting state before starting the read operation.Additional restriction for reader priority: If a reader is already reading when another reader is applying for a read operation, the reader can directly start the reading operation.That is, there can be one or more readers reading.Read-write mutual exclusion means that one thread cannot read while another thread is writing.Write-write is mutually exclusive, that is, two writers cannot write at the same time.Reader-writer problem read and write operation restrictions (including reader first and writer first):.The semaphore mechanism is used to realize the reader-writer problem of reader first and writer first. Each thread performs read and write operations according to the requirements of the corresponding test data file. Use these n threads to represent n readers or writers. Create a console process, this process contains n threads.
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