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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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38 | pj | 24 | CVS : $Id: nop.h,v 1.2 2003-01-07 17:12:20 pj Exp $ |
2 | pj | 25 | |
26 | File: $File$ |
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38 | pj | 27 | Revision: $Revision: 1.2 $ |
28 | Last update: $Date: 2003-01-07 17:12:20 $ |
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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> |
2 | pj | 83 | |
38 | pj | 84 | RLEVEL NOP_register_module(void); |
85 | |||
2 | pj | 86 | #endif |