annotate src/buf.h @ 132:8e93917ce4be
add sys_read_impl.cbc (incomplete)
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anatofuz |
| date |
Thu, 05 Dec 2019 10:59:27 +0900 |
| parents |
83c23a36980d |
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line source |
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0
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1 #ifndef INCLUDE_BUF_H
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2 #define INCLUDE_BUF_H
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3
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4 struct buf {
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5 int flags;
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6 uint dev;
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7 uint sector;
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8 struct buf *prev; // LRU cache list
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9 struct buf *next;
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10 struct buf *qnext; // disk queue
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11 uchar data[512];
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12 };
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13
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14 #define B_BUSY 0x1 // buffer is locked by some process
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15 #define B_VALID 0x2 // buffer has been read from disk
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16 #define B_DIRTY 0x4 // buffer needs to be written to disk
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17
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18 #endif
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