Subversion Repositories HelenOS

Rev

Rev 1888 | Rev 2089 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1109 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2006 Jakub Jermar
1109 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1780 jermar 29
/** @addtogroup sync
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1888 jermar 35
#ifndef KERN_FUTEX_H_
36
#define KERN_FUTEX_H_
1109 jermar 37
 
38
#include <arch/types.h>
39
#include <typedefs.h>
40
#include <synch/waitq.h>
41
#include <genarch/mm/page_ht.h>
42
#include <genarch/mm/page_pt.h>
43
 
44
/** Kernel-side futex structure. */
45
struct futex {
1780 jermar 46
    uintptr_t paddr;    /**< Physical address of the status variable. */
1139 jermar 47
    waitq_t wq;     /**< Wait queue for threads waiting for futex availability. */
48
    link_t ht_link;     /**< Futex hash table link. */
1460 jermar 49
    count_t refcount;   /**< Number of tasks that reference this futex. */
1109 jermar 50
};
51
 
52
extern void futex_init(void);
1780 jermar 53
extern unative_t sys_futex_sleep_timeout(uintptr_t uaddr, uint32_t usec, int flags);
54
extern unative_t sys_futex_wakeup(uintptr_t uaddr);
1109 jermar 55
 
1583 jermar 56
extern void futex_cleanup(void);
57
 
1109 jermar 58
#endif
1702 cejka 59
 
1780 jermar 60
/** @}
1702 cejka 61
 */