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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 Jakub Jermar |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | /** @addtogroup sync |
29 | /** @addtogroup sync |
| 30 | * @{ |
30 | * @{ |
| 31 | */ |
31 | */ |
| 32 | /** @file |
32 | /** @file |
| 33 | */ |
33 | */ |
| 34 | 34 | ||
| 35 | #ifndef __FUTEX_H__ |
35 | #ifndef __FUTEX_H__ |
| 36 | #define __FUTEX_H__ |
36 | #define __FUTEX_H__ |
| 37 | 37 | ||
| 38 | #include <arch/types.h> |
38 | #include <arch/types.h> |
| 39 | #include <typedefs.h> |
39 | #include <typedefs.h> |
| 40 | #include <synch/waitq.h> |
40 | #include <synch/waitq.h> |
| 41 | #include <genarch/mm/page_ht.h> |
41 | #include <genarch/mm/page_ht.h> |
| 42 | #include <genarch/mm/page_pt.h> |
42 | #include <genarch/mm/page_pt.h> |
| 43 | 43 | ||
| 44 | /** Kernel-side futex structure. */ |
44 | /** Kernel-side futex structure. */ |
| 45 | struct futex { |
45 | struct futex { |
| 46 | __address paddr; /**< Physical address of the status variable. */ |
46 | uintptr_t paddr; /**< Physical address of the status variable. */ |
| 47 | waitq_t wq; /**< Wait queue for threads waiting for futex availability. */ |
47 | waitq_t wq; /**< Wait queue for threads waiting for futex availability. */ |
| 48 | link_t ht_link; /**< Futex hash table link. */ |
48 | link_t ht_link; /**< Futex hash table link. */ |
| 49 | count_t refcount; /**< Number of tasks that reference this futex. */ |
49 | count_t refcount; /**< Number of tasks that reference this futex. */ |
| 50 | }; |
50 | }; |
| 51 | 51 | ||
| 52 | extern void futex_init(void); |
52 | extern void futex_init(void); |
| 53 | extern __native sys_futex_sleep_timeout(__address uaddr, __u32 usec, int flags); |
53 | extern unative_t sys_futex_sleep_timeout(uintptr_t uaddr, uint32_t usec, int flags); |
| 54 | extern __native sys_futex_wakeup(__address uaddr); |
54 | extern unative_t sys_futex_wakeup(uintptr_t uaddr); |
| 55 | 55 | ||
| 56 | extern void futex_cleanup(void); |
56 | extern void futex_cleanup(void); |
| 57 | 57 | ||
| 58 | #endif |
58 | #endif |
| 59 | 59 | ||
| 60 | /** @} |
60 | /** @} |
| 61 | */ |
61 | */ |
| 62 | 62 | ||
| 63 | 63 | ||