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/*
* Copyright (c) 2013 Richard Braun.
*
* 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/
#include <kern/assert.h>
#include <kern/error.h>
#include <kern/llsync.h>
#include <kern/mutex.h>
#include <kern/param.h>
#include <kern/rdxtree.h>
#include <kern/stddef.h>
#include <kern/stdint.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
int
vm_object_add(struct vm_object *object, uint64_t offset, struct vm_page *page)
{
int error;
mutex_lock(&object->lock);
error = rdxtree_insert(&object->pages, offset >> PAGE_SHIFT, page);
if (!error)
object->nr_pages++;
mutex_unlock(&object->lock);
assert(!error || (error == ERROR_NOMEM));
return error;
}
struct vm_page *
vm_object_get(const struct vm_object *object, uint64_t offset)
{
struct vm_page *page;
llsync_read_enter();
/* TODO Handle page state changes */
page = rdxtree_lookup(&object->pages, offset >> PAGE_SHIFT);
llsync_read_leave();
return page;
}
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