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/* Implementation of memory_object_terminate for pager library
Copyright (C) 1994, 1995, 1996 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_S.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;
p = ports_lookup_port (0, object, _pager_class);
if (!p)
return EOPNOTSUPP;
mutex_lock (&p->interlock);
_pager_wait_for_seqno (p, seqno);
if (control != p->memobjcntl)
{
printf ("incg terminate: wrong control port");
goto out;
}
if (name != p->memobjname)
{
printf ("incg terminate: wrong name port");
goto out;
}
while (p->noterm)
{
p->termwaiting = 1;
condition_wait (&p->wakeup, &p->interlock);
}
/* Destry the ports we received; mark that in P so that it doesn't bother
doing it again. */
mach_port_destroy (mach_task_self (), control);
mach_port_destroy (mach_task_self (), name);
p->memobjcntl = p->memobjname = MACH_PORT_NULL;
_pager_free_structure (p);
#ifdef KERNEL_INIT_RACE
if (p->init_head)
{
struct pending_init *i = p->init_head;
p->init_head = i->next;
if (!i->next)
p->init_tail = 0;
p->memobjcntl = i->control;
p->memobjname = i->name;
memory_object_ready (i->control, p->may_cache, p->copy_strategy);
p->pager_state = NORMAL;
free (i);
}
#endif
out:
_pager_release_seqno (p, seqno);
mutex_unlock (&p->interlock);
ports_port_deref (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;
struct attribute_request *ar;
wakeup = 0;
for (lr = p->lock_requests; lr; lr = lr->next)
{
lr->locks_pending = 0;
if (!lr->pending_writes)
wakeup = 1;
}
for (ar = p->attribute_requests; ar; ar = ar->next)
{
ar->attrs_pending = 0;
wakeup = 1;
}
if (wakeup)
condition_broadcast (&p->wakeup);
if (p->memobjcntl != MACH_PORT_NULL)
{
mach_port_deallocate (mach_task_self (), p->memobjcntl);
p->memobjcntl = MACH_PORT_NULL;
}
if (p->memobjname != MACH_PORT_NULL)
{
mach_port_deallocate (mach_task_self (), p->memobjname);
p->memobjname = MACH_PORT_NULL;
}
/* 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;
}
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