5.8 The Savings Account Problem. A savings account is shared by several people (processes). Each person may deposit or withdraw funds from the account. The current balance in the account is the sum of all deposits to date minus the sum of all withdrawals to date. The balance must never become negative. A deposit never has to delay (except for mutual exclusion), but a withdrawal has to wait until there are sufficient funds. (a) Develop a monitor to solve this problem. The monitor should have two procedures: deposit (amount) and withdraw (amount). First specify a Exercises 257 monitor invariant. Assume the arguments to deposit and withdraw are posi- tive. Use the Signal and Continue discipline.

5.8 The Savings Account Problem. A savings account is shared by several people (processes). Each person may deposit or withdraw funds from the account. The current balance in the account is the sum of all deposits to date minus the sum of all withdrawals to date. The balance must never become negative. A deposit never has to delay (except for mutual exclusion), but a withdrawal has to wait until there are sufficient funds. (a) Develop a monitor to solve this problem. The monitor should have two procedures: deposit (amount) and withdraw (amount). First specify a Exercises 257 monitor invariant. Assume the arguments to deposit and withdraw are posi- tive. Use the Signal and Continue discipline.

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter18: Stacks And Queues

Section: Chapter Questions

Problem 18PE

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Concept explainers

Parallel processing

The process of running two or more processors together is known as parallel processing. In parallel processing, a single process is divided into multiple parts, and each individual part is executed at the same time. It is used to handle various parts of a task at the same time. The main advantage of parallel processing is the reduction of the processing time of the program, where the processor in a system is the CPU. Hence, parallel processing can be performed by using multiple CPUs, and having more than one CPU creates a multi-processor. Another name of parallel processors is block processors. Here, the size of a block is the number of inputs that can be processed simultaneously in a single clock cycle.

Question

Note that the monitor invariant is: current_balance >= 0

5.8 The Savings Account Problem. A savings account is shared by several people
(processes). Each person may deposit or withdraw funds from the account. The
current balance in the account is the sum of all deposits to date minus the sum of
all withdrawals to date. The balance must never become negative. A deposit
never has to delay (except for mutual exclusion), but a withdrawal has to wait
until there are sufficient funds.
(a) Develop a monitor to solve this problem. The monitor should have two
procedures: deposit (amount) and withdraw (amount). First specify a
Exercises 257
monitor invariant. Assume the arguments to deposit and withdraw are posi-
tive. Use the Signal and Continue discipline.

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