Mercurial > hg > CbC > CbC_xv6
annotate src/buf.h @ 141:bb1b0676e27b
merge
| author | anatofuz |
|---|---|
| date | Thu, 12 Dec 2019 14:28:15 +0900 |
| parents | 83c23a36980d |
| children |
| rev | line source |
|---|---|
| 0 | 1 #ifndef INCLUDE_BUF_H |
| 2 #define INCLUDE_BUF_H | |
| 3 | |
| 4 struct buf { | |
| 5 int flags; | |
| 6 uint dev; | |
| 7 uint sector; | |
| 8 struct buf *prev; // LRU cache list | |
| 9 struct buf *next; | |
| 10 struct buf *qnext; // disk queue | |
| 11 uchar data[512]; | |
| 12 }; | |
| 13 | |
| 14 #define B_BUSY 0x1 // buffer is locked by some process | |
| 15 #define B_VALID 0x2 // buffer has been read from disk | |
| 16 #define B_DIRTY 0x4 // buffer needs to be written to disk | |
| 17 | |
| 18 #endif |