9. Consider the code example for allocating and releasing processes as shown below. #define MAX PROCESSES 255 int number.of-processes = 0; /+ the implementation of fork() calls this function / int allocate.process () { int new.pid; if (number.of.processes - MAX PROCESSES) return -1; else { /* allocate necessary process resources / ++number.of.processes; return new.pid; /+ the implementation of exit () calls this function / void release.process () { /* release process resources +/ --number.of.processes; Figure 5.23 Allocating and releasing processes. a. Identify the race condition(s). b. Assume you have a mutex lock named mutex with the operations acquire() and release(). Indicate where the locking needs to be placed to prevent the race condition(s).

9. Consider the code example for allocating and releasing processes as shown below. #define MAX PROCESSES 255 int number.of-processes = 0; /+ the implementation of fork() calls this function / int allocate.process () { int new.pid; if (number.of.processes - MAX PROCESSES) return -1; else { /* allocate necessary process resources / ++number.of.processes; return new.pid; /+ the implementation of exit () calls this function / void release.process () { /* release process resources +/ --number.of.processes; Figure 5.23 Allocating and releasing processes. a. Identify the race condition(s). b. Assume you have a mutex lock named mutex with the operations acquire() and release(). Indicate where the locking needs to be placed to prevent the race condition(s).

Microsoft Visual C#

7th Edition

ISBN:9781337102100

Author:Joyce, Farrell.

Publisher:Joyce, Farrell.

Chapter8: Advanced Method Concepts

Section: Chapter Questions

Problem 7RQ

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