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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 | |||
| 22 | /** |
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| 23 | ------------ |
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| 80 | pj | 24 | CVS : $Id: nop.h,v 1.3 2003-03-13 13:39:04 pj Exp $ |
| 2 | pj | 25 | |
| 26 | File: $File$ |
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| 80 | pj | 27 | Revision: $Revision: 1.3 $ |
| 28 | Last update: $Date: 2003-03-13 13:39:04 $ |
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| 2 | pj | 29 | ------------ |
| 30 | |||
| 31 | This file contains the No Protocol (NOP) implementation of mutexes |
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| 32 | |||
| 33 | Title: |
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| 34 | NOP (Binary Semaphores) |
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| 35 | |||
| 36 | Resource Models Accepted: |
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| 37 | None |
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| 38 | |||
| 39 | Description: |
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| 40 | This module implement a mutex interface using extraction and insertion |
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| 41 | into scheduling queues. |
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| 42 | |||
| 43 | Exceptions raised: |
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| 44 | none |
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| 45 | |||
| 46 | Restrictions & special features: |
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| 47 | - This module is NOT Posix compliant |
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| 48 | - This module can manage any number of NOP mutexes. |
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| 49 | - A NOP mutex can be statically allocated. To do this, the init function |
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| 50 | have to define a macro that puts this information in the mutex |
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| 51 | descriptor: mutexlevel = <NOP resource level>; opt = NULL; |
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| 52 | for example, if the NOP module is registered at level 1, the macro is |
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| 53 | like: |
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| 54 | #define MUTEX_INITIALIZER {1,(void *)NULL} |
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| 55 | |||
| 56 | **/ |
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| 57 | |||
| 58 | /* |
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| 59 | * Copyright (C) 2000 Paolo Gai |
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| 60 | * |
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| 61 | * This program is free software; you can redistribute it and/or modify |
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| 62 | * it under the terms of the GNU General Public License as published by |
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| 63 | * the Free Software Foundation; either version 2 of the License, or |
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| 64 | * (at your option) any later version. |
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| 65 | * |
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| 66 | * This program is distributed in the hope that it will be useful, |
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| 67 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 68 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 69 | * GNU General Public License for more details. |
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| 70 | * |
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| 71 | * You should have received a copy of the GNU General Public License |
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| 72 | * along with this program; if not, write to the Free Software |
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| 73 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 74 | * |
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| 75 | */ |
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| 76 | |||
| 77 | |||
| 78 | |||
| 79 | #ifndef __NOP_H__ |
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| 80 | #define __NOP_H__ |
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| 81 | |||
| 38 | pj | 82 | #include <kernel/types.h> |
| 80 | pj | 83 | #include "ll/sys/cdefs.h" |
| 2 | pj | 84 | |
| 80 | pj | 85 | __BEGIN_DECLS |
| 86 | |||
| 38 | pj | 87 | RLEVEL NOP_register_module(void); |
| 88 | |||
| 80 | pj | 89 | __END_DECLS |
| 2 | pj | 90 | #endif |