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Cocoa Programming for Mac OS X, Third Edition
book

Cocoa Programming for Mac OS X, Third Edition

by Aaron Hillegass
May 2008
Intermediate to advanced content levelIntermediate to advanced
464 pages
8h 13m
English
Addison-Wesley Professional
Content preview from Cocoa Programming for Mac OS X, Third Edition

Chapter 4. Memory Management

Let’s say that there are two instances of Person and that each has a favoriteColor, a pointer to a color object. If two people have the same favoriteColor, the objects will have pointers to the same color object. As the people age, their favorite color might change. Eventually, the color object might be no one’s favorite (Figure 4.1).

The Problem

Figure 4.1. The Problem

We do not want this orphaned color to be taking up room in our program’s memory. We want the memory deallocated, so that we can put new objects in that memory, but we must be sure that the color is not deallocated while any objects are pointing to it.

This is a relatively ...

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Publisher Resources

ISBN: 9780321562739Purchase book