Legacy Document

Inside Macintosh: Memory /

Chapter 2 - Memory Manager / Memory Manager Reference

Memory Manager Routines

Setting the Properties of Relocatable Blocks

A relocatable block can be either locked or unlocked and either purgeable or unpurgeable. In addition, it can have its resource bit either set or cleared. To determine the state of any of these properties, use the HGetState function. To change these properties, use the HLock, HUnlock, HPurge, HNoPurge, HSetRBit, and HClrRBit procedures. To restore these properties, use the HSetState procedure.

WARNING

Be sure to use these procedures to get and set the properties of relocatable blocks. In particular, do not rely on the structure of master pointers, because their structure in 24-bit mode is different from their structure in 32-bit mode.

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Subtopics

HGetState

HSetState

HLock

HUnlock

HPurge

HNoPurge

HSetRBit

HClrRBit