ZCOM Tables and Data Structures

Data Buffer Pool

Figure 3-8

Buffer Pool Layout (when first initialized)

Free Queue Header

List Head List Tail

Block Block

Pointer Pointer

Dummy Free Buffer

Dummy

Dummy

Buffer

Next

Previous

Used

Used

Flag

Block

Block

Flag

Flag

 

Pointer

Pointer

 

 

 

 

 

Buffer

Flag

Main Free Buffer

Dummy Dummy Buffer

Used Used Flag

Flag Flag

Next Previous

Block Block

Pointer Pointer

Buffer

Flag

Dummy

Used

Flag

Dummy

Used

Flag

Chapter 3

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Image 103
HP UX 11i v1 I/O Cards manual Buffer Pool Layout when first initialized