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| ZCOM Tables and Data Structures | ||
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| Data Buffer Pool | |
| Free Buffer Header Structure (zfbh_type) |
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| The buffer header contains information about the buffer as well as a | ||||
| linkage to the next buffer. (zbhd_type). See Table | ||||
Table | Free Buffer Header Structure (zfbh_type) |
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Field Name | Field Description |
| Field Type |
| Size |
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| (Bytes) | |||
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BFFLAG | System flags (length & status) | uns.int |
| 4 | |
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SPARE1 | Reserved, not used | int |
| 4 | |
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QHEAD | Pointer to next buffer on queue | pointer |
| 8 | |
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BFPREV | Pointer to previous buffer on queue | pointer |
| 8 | |
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Table | Buffer Structure (zbhd_type) |
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Field Name | Field Description |
| Field Type |
| Size |
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| (Bytes) | |||
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BFFLAG | System flags (length & status) |
| uns.int |
| 4 |
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BFLEN | Buffer length in bytes (data portion) |
| int |
| 4 |
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BFLINK | Pointer to next buffer on queue |
| pointer |
| 8 |
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BFDATA | Pointer to 1st byte of data in buffer |
| pointer |
| 8 |
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BFRESP | Pointer to response record |
| pointer |
| 8 |
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Chapter 3 | 109 |