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Inside Macintosh: PowerPC System Software /

Chapter 3 - Code Fragment Manager / Code Fragment Manager Reference

Data Structures

Memory Location Record

For fragments located in memory, the inMem field of a fragment location record contains a memory location record, which specifies the location of the fragment in memory. A memory location record is defined by the MemFragment data type.

struct MemFragment {
   Ptr                     address;       /*pointer to start of fragment*/
   long                    length;        /*length of fragment*/
   Boolean                 inPlace;       /*is data section in place?*/
};
typedef struct MemFragment MemFragment;

Field Description

address

A pointer to the beginning of the fragment in memory.

length

The length, in bytes, of the fragment.

inPlace

A Boolean value that specifies whether the container's data section is instantiated in place (true) or elsewhere (false).

IMPORTANT

The fields of a memory location record are aligned in memory in accordance with 680x0 alignment conventions.