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/* 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);
}
}
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