From c1f5bf6d4849a1fe6b5c81e1900f8b0696288571 Mon Sep 17 00:00:00 2001 From: "Michael I. Bushnell" Date: Thu, 13 Jan 1994 20:53:13 +0000 Subject: Initial revision --- libpager/seqnos.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 libpager/seqnos.c (limited to 'libpager/seqnos.c') diff --git a/libpager/seqnos.c b/libpager/seqnos.c new file mode 100644 index 00000000..c1a5ba3d --- /dev/null +++ b/libpager/seqnos.c @@ -0,0 +1,41 @@ +/* Sequence number synchronization routines for pager library + Copyright (C) 1994 Free Software Foundation + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* Wait until all preceding messages on this port have + had a chance to be honored. */ +void +_pager_wait_for_seqno (struct pager *p, + int seqno) +{ + while (seqno != p->seqno + 1) + { + p->waitingforseqno = 1; + condition_wait (&p->wakeup, &p->interlock); + } + p->seqno = seqno; +} + +/* Allow the next message in. */ +void +release_seqno (struct pager *p) +{ + if (p->waitingforseqno) + { + p->waitingforseqno = 0; + condition_broadcast (&p->wakeup); + } +} -- cgit v1.2.3