EBK ENHANCED DISCOVERING COMPUTERS & MI
1st Edition
ISBN: 8220100606922
Author: Vermaat
Publisher: YUZU
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Chapter 8, Problem 23SG
Explanation of Solution
Ways to safely remove the removable storage media:
The steps to remove or eject the removable storage media are given below:
- Once completing the transferring process, close all files that are opened from a media device.
- Open the window showing all the drives and media, which are connected to a user system or mobile device and then choose the drive or media that a user needs to remove or eject safely.
- Click the command button for safely removing the removable storage media from a system or mobile device...
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Given a shared data set, we allow multiple readers to read at the same time, and only one single writer can access the shared data at the same time. In the lecture slides, a solution is given. However, the problem is that the write cannot write forever, if there are always at least one reader.
How to ensure that the writer can eventually write? Propose your solution by using semaphores and implemented in Python
from threading import Thread, Semaphore
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class Reader(Thread):
def__init__(self, name):
self.n=name; Thread.__init__(self)
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globalnr, nw, dr, dw
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# ⟨await nw == 0 then nr += 1⟩
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ifnw>0:
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dr+=1; e.release(); r.acquire()
nr+=1
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Chapter 8 Solutions
EBK ENHANCED DISCOVERING COMPUTERS & MI
Ch. 8 - Prob. 1SGCh. 8 - Prob. 2SGCh. 8 - Prob. 3SGCh. 8 - Prob. 4SGCh. 8 - Prob. 5SGCh. 8 - Prob. 6SGCh. 8 - Prob. 7SGCh. 8 - Prob. 8SGCh. 8 - Prob. 9SGCh. 8 - Prob. 10SG
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