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>32 PTY support

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Submitted by: Heikki Suonsivu <hsu@cs.hut.fi>
This commit is contained in:
Jordan K. Hubbard 1995-02-09 11:13:30 +00:00
parent 89c1e72662
commit 3663f75c18
1 changed files with 43 additions and 3 deletions
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46
sys/kern/tty.c
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@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)tty.c 8.8 (Berkeley) 1/21/94
* $Id: tty.c,v 1.19 1995/01/30 06:16:59 bde Exp $
* $Id: tty.c,v 1.20 1995/02/08 22:02:02 bde Exp $
*/
#include <sys/param.h>
@ -55,11 +55,11 @@
#include <sys/syslog.h>
#include <sys/signalvar.h>
#include <sys/resourcevar.h>
#include <sys/malloc.h>
#include <vm/vm.h>
static int proc_compare __P((struct proc *p1, struct proc *p2));
static int ttnread __P((struct tty *));
static void ttyblock __P((struct tty *tp));
static void ttyecho __P((int, struct tty *tp));
static void ttyrubo __P((struct tty *, int));
@ -960,7 +960,11 @@ win: splx(s);
return (0);
}
static int
/*
* This is now exported to the cy driver as well; if you hack this code,
* then be sure to keep /sys/i386/isa/cy.c properly advised! -jkh
*/
int
ttnread(tp)
struct tty *tp;
{
@ -2097,3 +2101,39 @@ ttysleep(tp, chan, pri, wmesg, timo)
return (error);
return (tp->t_gen == gen ? 0 : ERESTART);
}
/*
* Allocate a tty structure and its associated buffers.
*/
struct tty *
ttymalloc()
{
struct tty *tp;
MALLOC(tp, struct tty *, sizeof(struct tty), M_TTYS, M_WAITOK);
bzero(tp, sizeof *tp);
/*
* Initialize or restore a cblock allocation policy suitable for
* the standard line discipline.
*/
clist_alloc_cblocks(&tp->t_canq, TTYHOG, 512);
clist_alloc_cblocks(&tp->t_outq, TTMAXHIWAT + 200, 512);
clist_alloc_cblocks(&tp->t_rawq, TTYHOG, 512);
return(tp);
}
/*
* Free a tty structure and its buffers.
*/
void
ttyfree(tp)
struct tty *tp;
{
clist_free_cblocks(&tp->t_canq);
clist_free_cblocks(&tp->t_outq);
clist_free_cblocks(&tp->t_rawq);
FREE(tp, M_TTYS);
}