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38 | 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 | * (see the web pages for full authors list) |
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11 | * |
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12 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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13 | * |
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14 | * http://www.sssup.it |
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15 | * http://retis.sssup.it |
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16 | * http://shark.sssup.it |
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17 | */ |
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18 | |||
19 | /** |
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20 | ------------ |
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21 | CVS : $Id: tskmsg.c,v 1.1 2003-01-07 17:09:24 pj Exp $ |
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22 | |||
23 | File: $File$ |
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24 | Revision: $Revision: 1.1 $ |
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25 | Last update: $Date: 2003-01-07 17:09:24 $ |
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26 | ------------ |
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27 | |||
28 | **/ |
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29 | |||
30 | /* |
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31 | * Copyright (C) 2002 Paolo Gai |
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32 | * |
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33 | * This program is free software; you can redistribute it and/or modify |
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34 | * it under the terms of the GNU General Public License as published by |
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35 | * the Free Software Foundation; either version 2 of the License, or |
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36 | * (at your option) any later version. |
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37 | * |
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38 | * This program is distributed in the hope that it will be useful, |
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39 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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40 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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41 | * GNU General Public License for more details. |
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42 | * |
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43 | * You should have received a copy of the GNU General Public License |
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44 | * along with this program; if not, write to the Free Software |
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45 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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46 | * |
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47 | */ |
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48 | |||
49 | #include <stdarg.h> |
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50 | #include <ll/ll.h> |
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51 | #include <ll/stdlib.h> |
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52 | #include <ll/stdio.h> |
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53 | #include <ll/string.h> |
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54 | #include <kernel/config.h> |
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55 | #include <kernel/model.h> |
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56 | #include <kernel/const.h> |
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57 | #include <sys/types.h> |
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58 | #include <kernel/types.h> |
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59 | #include <kernel/descr.h> |
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60 | #include <errno.h> |
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61 | #include <kernel/var.h> |
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62 | #include <kernel/func.h> |
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63 | #include <kernel/trace.h> |
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64 | |||
65 | |||
66 | /* |
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67 | The running task (pointed by exec_shadow) sent a message m to the |
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68 | scheduling module that handle the task p. |
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69 | |||
70 | If the message has value NULL the behavior should be the |
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71 | task_endcycle primitive behavior, and an endcycle tracer event is |
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72 | generated. |
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73 | |||
74 | */ |
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75 | int task_message(void *m, int reschedule) |
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76 | { |
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77 | LEVEL l; /* for readableness only */ |
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78 | |||
79 | int retvalue; |
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80 | |||
81 | if (reschedule) { |
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82 | proc_table[exec_shadow].context = kern_context_save(); |
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83 | |||
84 | kern_epilogue_macro(); |
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85 | |||
86 | l = proc_table[exec_shadow].task_level; |
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87 | retvalue = level_table[l]->public_message(l,exec_shadow,m); |
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88 | |||
89 | exec = exec_shadow = -1; |
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90 | scheduler(); |
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91 | |||
92 | kern_context_load(proc_table[exec_shadow].context); |
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93 | |||
94 | } else { |
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95 | SYS_FLAGS f; |
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96 | |||
97 | f = kern_fsave(); |
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98 | l = proc_table[exec_shadow].task_level; |
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99 | retvalue = level_table[l]->public_message(l,exec_shadow,m); |
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100 | kern_frestore(f); |
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101 | } |
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102 | |||
103 | return retvalue; |
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104 | } |