view src/buf.h @ 94:d876c9a65239 default tip

impl mac os target
author anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
date Wed, 23 Oct 2019 14:31:38 +0900
parents 83c23a36980d
children
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#ifndef INCLUDE_BUF_H
#define INCLUDE_BUF_H

struct buf {
    int        flags;
    uint       dev;
    uint       sector;
    struct buf *prev;  // LRU cache list
    struct buf *next;
    struct buf *qnext; // disk queue
    uchar      data[512];
};

#define B_BUSY  0x1  // buffer is locked by some process
#define B_VALID 0x2  // buffer has been read from disk
#define B_DIRTY 0x4  // buffer needs to be written to disk

#endif