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/* Implementation of memory_object_terminate 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. */
#include "priv.h"
#include "memory_object.h"
#include <stdio.h>
/* Implement the object termination call from the kernel as described
in <mach/memory_object.defs>. */
kern_return_t
_pager_seqnos_memory_object_terminate (mach_port_t object,
mach_port_seqno_t seqno,
mach_port_t control,
mach_port_t name)
{
struct pager *p;
if (!(p = check_port_type (object, pager_port_type)))
return EOPNOTSUPP;
if (control != p->memobjcntl)
{
printf ("incg terminate: wrong control port");
goto out;
}
if (name != p->memobjname)
{
printf ("incg terminate: wrong name port");
goto out;
}
mutex_lock (&p->interlock);
_pager_wait_for_seqno (p, seqno);
while (p->noterm)
{
p->termwaiting = 1;
condition_wait (&p->wakeup, &p->interlock);
}
_pager_wait_for_seqno (p, seqno);
while (p->noterm)
{
p->termwaiting = 1;
condition_wait (&p->wakeup, &p->interlock);
}
_pager_free_structure (p);
out:
done_with_port (p);
return 0;
}
/* Shared code for termination from memory_object_terminate and
no-senders. The pager must be locked. This routine will
deallocate all the ports and memory that pager P references. */
void
_pager_free_structure (struct pager *p)
{
int wakeup;
struct lock_request *lr;
wakeup = 0;
for (lr = p->lock_requests; lr; lr = lr->next)
{
lr->locks_pending = 0;
if (!lr->pending_writes)
wakeup = 1;
}
if (wakeup)
condition_broadcast (&p->wakeup);
mach_port_deallocate (mach_task_self (), p->memobjcntl);
mach_port_deallocate (mach_task_self (), p->memobjname);
/* Free the pagemap */
if (p->pagemapsize)
{
vm_deallocate (mach_task_self (), (u_int)p->pagemap, p->pagemapsize);
p->pagemapsize = 0;
p->pagemap = 0;
}
p->pager_state = NOTINIT;
_pager_release_seqno (p);
mutex_unlock (&p->interlock);
}
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