source: buchla-68k/include/io.h

/*
   ============================================================================
        io.h -- Buchla 700 I/O library definitions
        Version 12 -- 1987-09-25 -- D.N. Lynx Crowe
   ============================================================================
*/

#pragma once

#include "fspars.h"             /* file system parameters */
#include "stdint.h"

struct devtabl;
struct channel;

typedef int16_t (*chclo)(io_arg arg);
typedef int16_t (*devop)(int8_t *name, uint16_t flag, struct channel *chp, struct devtabl *dp);

struct channel {                /* channel table entry */

        int16_t c_read;         /* read routine index */
        int16_t c_write;        /* write routine index */
        int16_t c_ioctl;        /* ioctl routine index */
        int16_t c_seek;         /* seek routine index */
        chclo   c_close;        /* close function pointer */
        io_arg  c_arg;          /* argument to channel driver */
};

struct device {                 /* device control structure */

        int16_t d_read;         /* read routine code */
        int16_t d_write;        /* write routine code */
        int16_t d_ioctl;        /* ioctl routine code */
        int16_t d_seek;         /* seek routine code */
        devop   d_open;         /* special open function */
        int16_t d_kind;         /* kind of device */
};

struct devtabl {                /* device table entry */

        int8_t  *d_name;        /* device name */
        struct  device  *d_dev; /* pointer to device structure */
};