Mercurial > hg > Members > mitsuki > xv6_rpi2_port
comparison uprogs/buf.h @ 0:ed10291ff195
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| author | mir3636 |
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| date | Sun, 06 Jan 2019 19:27:03 +0900 |
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| children |
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| -1:000000000000 | 0:ed10291ff195 |
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| 1 struct buf { | |
| 2 int flags; | |
| 3 uint dev; | |
| 4 uint sector; | |
| 5 struct buf *prev; // LRU cache list | |
| 6 struct buf *next; | |
| 7 struct buf *qnext; // disk queue | |
| 8 uchar data[512]; | |
| 9 }; | |
| 10 #define B_BUSY 0x1 // buffer is locked by some process | |
| 11 #define B_VALID 0x2 // buffer has been read from disk | |
| 12 #define B_DIRTY 0x4 // buffer needs to be written to disk | |
| 13 |