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/* Wrapper for unsolicited memory_object_data_supply
Copyright (C) 1996 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd 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.
The GNU Hurd 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "priv.h"
void
pager_offer_page (struct pager *p,
int precious,
int writelock,
vm_offset_t offset,
vm_address_t buf)
{
char *pm_entry;
/* The caller expects this to get written back, but if the page is
currently resident then our request will get ignored, so flush it
first */
if (precious)
{
mutex_lock (&p->interlock);
_pager_pagemap_resize (p, offset + vm_page_size);
pm_entry = &p->pagemap[offset / vm_page_size];
if (*pm_entry & PM_INCORE)
{
mutex_unlock (&p->interlock);
pager_flush_some (p, offset, vm_page_size, 1);
}
else
mutex_unlock (&p->interlock);
}
memory_object_data_supply (p->memobjcntl, offset, buf, vm_page_size, 0,
writelock ? VM_PROT_WRITE : VM_PROT_NONE,
precious, MACH_PORT_NULL);
}
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