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/* Implementation of memory_object_lock_completed 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. */
/* A lock_request has finished. Do our part of the wakeup
process. */
_pager_seqnos_memory_object_lock_completed (mach_port_t object,
mach_port_seqno_t seqno,
mach_port_t control,
vm_offset_t offset,
vm_size_t length)
{
struct controlinfo *ci;
struct lock_request *lr;
int wakeup;
if (!(ci = check_port_type (object, pager_port_type)))
{
printf ("Bad lock completed\n");
return EOPNOTSUPP;
}
if (control != ci->memobjcntl)
{
printf ("lock_completed: bad control port\n");
return EPERM;
}
mach_port_deallocate (mach_task_self (), control);
mutex_lock (&ci->interlock);
_pager_wait_for_seqno (ci, seqno);
wakeup = 0;
for (lr = ci->lock_requests; lr; lr = lr->next)
if (lr->start == offset && lr->end == offset + length
&& !--lr->locks_pending && !lr->pending_writes)
wakeup = 1;
condition_broadcast (&ci->wakeup);
_pager_release_seqno (ci);
mutex_unlock (&ci->interlock);
return 0;
}
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