Date: Fri, 28 Aug 1998 12:35:59 -0700 (PDT) From: "Steven G. Kargl" <kargl@troutmask.apl.washington.edu> To: freebsd-hardware@FreeBSD.ORG Subject: new gpib driver and select/poll issues Message-ID: <199808281935.MAA13843@troutmask.apl.washington.edu>
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Ladies and Gents,
John Galbraith has been writing a new GPIB driver. His effort
appears to be targeted at a 2.2.x system.
I'm trying to make his stuff work under -current, and I have
run into a problem with the use of poll versus select in -current.
In particular, the changes in revision 1.34 of sys/sys/conf.h
have eliminated d_select_t and noselect which John uses. The
d_select_t can be replaced by d_poll_t, but does one do about
the noselect.
This snippet is the part of the code in question.
/* device switch entry table */
struct cdevsw gp_cdevsw = {
(d_open_t *) gp_open, /* open */
(d_close_t *) gp_close, /* close */
(d_read_t *) gp_read, /* read */
(d_write_t *) gp_write, /* write */
(d_ioctl_t *) gp_ioctl, /* ioctl */
(d_stop_t *) nullstop, /* stop */
(d_reset_t *) nullreset, /* reset (not used) */
(d_devtotty_t *) nodevtotty,/* ttys */
(d_select_t *) noselect, /* select */
(d_mmap_t *) nommap, /* mmap */
(d_strategy_t *) nostrategy,/* strategy */
(char*) "gp", /* name */
NULL, /* struct bdevsw* */
-1 /* GP_CDEV_MAJOR */ /* major number of driver */
};
Is this the proper way to support both -current and 2.2.x?
#ifdef __FreeBSD__ >= 3
(d_poll_t *) nopoll,
#else
(d_select_t *) noselect;
#endif
--
Steve
finger kargl@troutmask.apl.washington.edu
http://troutmask.apl.washington.edu/~clesceri/kargl.html
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