Legacy Document

Inside Macintosh: QuickDraw GX Environment and Utilities /

Chapter 2 - QuickDraw GX Memory Management / About QuickDraw GX Memory Management

Additional Topics

The latter part of this chapter discusses some issues that are relevant in only a few very specific and uncommon situations: handling low-memory problems, manual loading and unloading of objects, using functions that do not require a graphics client or its heap, specifying a memory starting location for a graphics client and its heap, and working with multiple graphics clients.

Under normal circumstances, QuickDraw GX resolves low-memory conditions and handles the loading of objects as needed, performing these tasks automatically and in a way that is transparent to your application. However, you can affect some of its processing in these areas. You can also set an attribute that prevents QuickDraw GX from allocating additional memory blocks to your graphics client heap and you can manually load and unload objects. These topics are described in the section "Additional Memory Management Topics" beginning on page 2-10.