Mercurial > hg > Members > innparusu > xv6-rpi
comparison src/buf.h @ 0:83c23a36980d
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| author | Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 26 May 2017 23:11:05 +0900 |
| parents | |
| children |
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| -1:000000000000 | 0:83c23a36980d |
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| 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 |