Cache structure
CacheDataStructure
General format:
- Key
- expiration time
- data size
- data pointer
Key
- Serial number (8 bytes)
-
pointer to data structure. Either:
- filetype pointer
- connection_in pointer
- character pointer
- integer
| Record type | Serial number | Union | extension | time limit | data size | data value |
|---|---|---|---|---|---|---|
| Data value | device ID | filetype * | extension (if an array) | volatile/stable | data size | pointer to data value |
| Directory entry | ID of DS2409 device/branch or 0 for root | pointer to connection_in * | index in directory | directory timeout | 8 bytes | serial number |
| Device presence | device ID | NULL | "-1" | directory timeout | sizeof(int) | pointer to bus number |
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