Homework SourseThe Second Readerwriter problem requires that once a writer
The Second Reader-writer problem requires that, once a writer process is ready, it perform its write as soon as possible. That is, if a writer is waiting to access the object, no new readers can start reading.Write a semaphore-based solution for Second reader-writer problem.
Solution
The solutionn of reader-writer problem using semaphore is as follows:
| Writer process | Reader Process |
|---|---|
| wait(write); . . . writing is performed . . . signal(write); | wait(mutually exclusive); readingcount := readingcount + 1; if readingcount = 1 then wait(write); signal(mutually exclusive); . . . reading is performed . . . wait(mutually exclusive); readingcount := readingcount - 1; if readcount = 0 then signal(write); signal(mutually exclusive); |
