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| 2 | pj | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
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| 3 | * |
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| 4 | * Coordinators: |
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| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 7 | * |
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| 8 | * Authors : |
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| 9 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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| 11 | * Luca Abeni <luca@gandalf.sssup.it> |
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| 12 | * (see the web pages for full authors list) |
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| 13 | * |
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| 14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 15 | * |
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| 16 | * http://www.sssup.it |
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| 17 | * http://retis.sssup.it |
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| 18 | * http://shark.sssup.it |
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| 19 | */ |
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| 20 | |||
| 21 | /*************************************** |
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| 22 | |||
| 23 | Semaphores for the kernel |
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| 24 | |||
| 25 | ***************************************/ |
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| 26 | |||
| 27 | /* |
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| 1031 | tullio | 28 | * CVS : $Id: semaph.h,v 1.3 2006-03-09 16:29:17 tullio Exp $ |
| 2 | pj | 29 | * |
| 30 | * File: $File$ |
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| 1031 | tullio | 31 | * Revision: $Revision: 1.3 $ |
| 32 | * Last update: $Date: 2006-03-09 16:29:17 $ |
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| 2 | pj | 33 | */ |
| 34 | |||
| 35 | /* |
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| 36 | * Copyright (C) 1999 Massimiliano Giorgi |
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| 37 | * |
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| 38 | * This program is free software; you can redistribute it and/or modify |
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| 39 | * it under the terms of the GNU General Public License as published by |
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| 40 | * the Free Software Foundation; either version 2 of the License, or |
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| 41 | * (at your option) any later version. |
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| 42 | * |
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| 43 | * This program is distributed in the hope that it will be useful, |
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| 44 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 45 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 46 | * GNU General Public License for more details. |
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| 47 | * |
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| 48 | * You should have received a copy of the GNU General Public License |
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| 49 | * along with this program; if not, write to the Free Software |
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| 50 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 51 | * |
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| 52 | */ |
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| 53 | |||
| 54 | #ifndef _FS_SEMAPH_H |
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| 55 | #define _FS_SEMAPH_H |
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| 56 | |||
| 57 | #include <kernel/int_sem.h> |
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| 80 | pj | 58 | #include "ll/sys/cdefs.h" |
| 2 | pj | 59 | |
| 80 | pj | 60 | __BEGIN_DECLS |
| 61 | |||
| 2 | pj | 62 | /*+ a semaphore object +*/ |
| 63 | typedef internal_sem_t __sem_t; |
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| 64 | |||
| 65 | /* |
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| 66 | The following macros can be used to synchronize events; all |
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| 67 | require a pointer to a semaphore object and return nothing; |
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| 68 | a semaphore can have "val" resource free. |
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| 69 | */ |
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| 70 | |||
| 71 | /*+ Initialize a semaphore (to integer val) +*/ |
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| 72 | #define __sem_init(ptr,val) internal_sem_init((ptr),(val)) |
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| 73 | |||
| 74 | /*+ Wait for a semaphore +*/ |
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| 75 | #define __sem_wait(ptr) (internal_sem_wait(ptr)) |
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| 76 | |||
| 77 | /*+ Try to wait for a semaphore (return 0 on success) +*/ |
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| 78 | #define __sem_trywait(ptr) (internal_sem_trywait(ptr)) |
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| 79 | |||
| 80 | /*+ Signal a semaphore +*/ |
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| 81 | #define __sem_signal(ptr) (internal_sem_post(ptr)) |
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| 82 | |||
| 80 | pj | 83 | __END_DECLS |
| 2 | pj | 84 | #endif |
| 85 | |||
| 86 | |||
| 87 | |||
| 88 |