LCOM1920-T02G10

#ifndef _MINIX_CHARDRIVER_H

#define _MINIX_CHARDRIVER_H

#include <minix/driver.h>

typedef unsigned int cdev_id_t;

/* Entry points into the device dependent code of character drivers. */

struct chardriver {

  int (*cdr_open)(devminor_t minor, int access, endpoint_t user_endpt);

  int (*cdr_close)(devminor_t minor);

  ssize_t (*cdr_read)(devminor_t minor, u64_t position, endpoint_t endpt,

        cp_grant_id_t grant, size_t size, int flags, cdev_id_t id);

  ssize_t (*cdr_write)(devminor_t minor, u64_t position, endpoint_t endpt,

        cp_grant_id_t grant, size_t size, int flags, cdev_id_t id);

  int (*cdr_ioctl)(devminor_t minor, unsigned long request, endpoint_t endpt,

        cp_grant_id_t grant, int flags, endpoint_t user_endpt, cdev_id_t id);

  int (*cdr_cancel)(devminor_t minor, endpoint_t endpt, cdev_id_t id);

  int (*cdr_select)(devminor_t minor, unsigned int ops, endpoint_t endpt);

  void (*cdr_intr)(unsigned int mask);

  void (*cdr_alarm)(clock_t stamp);

  void (*cdr_other)(message *m_ptr, int ipc_status);

};

/* Functions defined by libchardriver. */

void chardriver_announce(void);

int chardriver_get_minor(const message *m, devminor_t *minor);

void chardriver_process(const struct chardriver *cdp, message *m_ptr,

        int ipc_status);

void chardriver_terminate(void);

void chardriver_task(const struct chardriver *cdp);

void chardriver_reply_task(endpoint_t endpt, cdev_id_t id, int r);

void chardriver_reply_select(endpoint_t endpt, devminor_t minor, int ops);

#endif /* _MINIX_CHARDRIVER_H */