/* Called when a nosenders notification happens
   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. */


#include "priv.h"
#include <stdio.h>
#include <mach/notify.h>

/* The libpager library user must call this (and do nothing else) when
   a no-senders notification is received for a pager port.  P is pager
   on for which the notification was received; SEQNO and MSCOUNT are
   from the no-senders notification as described in <mach/notify.defs>. */
void
pager_no_senders (struct pager *p,
		  mach_port_seqno_t seqno,
		  mach_port_mscount_t mscount)
{
  mutex_lock (&p->interlock);
  _pager_wait_for_seqno (p, seqno);
  _pager_release_seqno (p, seqno);
  mutex_unlock (&p->interlock);
  
  ports_no_senders (p, mscount);
}


/* Called by port management routines when the last send-right
   to a pager has gone away.  This is a dual of pager_create.  */
void
pager_clean (void *arg)
{
  struct pager *p = arg;
#ifdef KERNEL_INIT_RACE
  struct pending_init *i, *tmp;
#endif  

  if (p->pager_state != NOTINIT)
    {
      mutex_lock (&p->interlock);
      _pager_free_structure (p);
#ifdef KERNEL_INIT_RACE
      for (i = p->init_head; i; i = tmp)
	{
	  mach_port_deallocate (mach_task_self (), i->control);
	  mach_port_deallocate (mach_task_self (), i->name);
	  tmp = i->next;
	  free (i);
	}
#endif
      mutex_unlock (&p->interlock);
    }
  
  pager_clear_user_data (p->upi);
}