2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
20 #ifndef __VMM_LOCK_H__
21 #define __VMM_LOCK_H__
24 #include <palacios/vmm_types.h>
28 typedef addr_t v3_lock_t;
30 int v3_lock_init(v3_lock_t * lock);
31 void v3_lock_deinit(v3_lock_t * lock);
34 // Interreupts unaffected
35 void v3_lock(v3_lock_t lock);
36 void v3_unlock(v3_lock_t lock);
38 // Interrupts disabled
39 addr_t v3_lock_irqsave(v3_lock_t lock);
40 void v3_unlock_irqrestore(v3_lock_t lock, addr_t irq_state);
43 // Reader-writer locks
45 typedef struct v3_rw_lock {
47 sint64_t reader_count;
50 int v3_rw_lock_init(v3_rw_lock_t *lock);
51 void v3_rw_lock_deinit(v3_rw_lock_t *lock);
53 // A read lock is not exclusive and does not
55 void v3_read_lock(v3_rw_lock_t *lock);
56 void v3_read_unlock(v3_rw_lock_t *lock);
58 // A write lock is exclusive and may affect
61 // leaves interrupt state alone
62 void v3_write_lock(v3_rw_lock_t *lock);
63 void v3_read_unlock(v3_rw_lock_t *lock);
65 // turn interrupts off
66 addr_t v3_write_lock_irqsave(v3_rw_lock_t *lock);
67 void v3_write_unlock_irqrestore(v3_rw_lock_t *lock, addr_t irq_state);