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Inside Macintosh: PowerPC System Software /

Chapter 3 - Code Fragment Manager / Code Fragment Manager Reference

Data Structures

Fragment Initialization Block

The Code Fragment Manager passes to your fragment's initialization routine a pointer to a fragment initialization block, which contains information about the fragment. A fragment initialization block is defined by the InitBlock data type.

struct InitBlock {
   long                    contextID;     /*context ID*/
   long                    closureID;     /*closure ID*/
   long                    connectionID;  /*connection ID*/
   FragmentLocator         fragLocator;   /*fragment location*/
   Ptr                     libName;       /*pointer to fragment name*/
   long                    reserved4a;    /*reserved*/
   long                    reserved4b;    /*reserved*/
   long                    reserved4c;    /*reserved*/
   long                    reserved4d;    /*reserved*/
};
typedef struct InitBlock InitBlock, *InitBlockPtr;

Field Description

contextID

A context ID.

closureID

A closure ID.

connectionID

A connection ID.

fragLocator

A fragment location record that specifies the location of the fragment. See the following section for details about the structure
of a fragment location record.

libName

A pointer to the name of the fragment being initialized. The name is a Pascal string (a length byte followed by the name itself).

reserved4a

Reserved for use by Apple Computer.

reserved4b

Reserved for use by Apple Computer.

reserved4c

Reserved for use by Apple Computer.

reserved4d

Reserved for use by Apple Computer.

IMPORTANT

The fields of a fragment initialization block are aligned in memory in accordance with 680x0 alignment conventions.