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1120 | 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 | * Copyright (C) 2000 Paolo Gai |
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21 | * |
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22 | * This program is free software; you can redistribute it and/or modify |
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23 | * it under the terms of the GNU General Public License as published by |
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24 | * the Free Software Foundation; either version 2 of the License, or |
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25 | * (at your option) any later version. |
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26 | * |
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27 | * This program is distributed in the hope that it will be useful, |
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28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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30 | * GNU General Public License for more details. |
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31 | * |
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32 | * You should have received a copy of the GNU General Public License |
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33 | * along with this program; if not, write to the Free Software |
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34 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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35 | * |
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36 | * |
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37 | * CVS : $Id: preempt.c,v 1.1 2002-11-11 08:22:46 pj Exp $ |
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38 | |||
39 | CBS test with preemption disabling |
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40 | |||
41 | */ |
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42 | |||
43 | #include "kernel/kern.h" |
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44 | |||
45 | void *periodic(void *arg) |
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46 | { |
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47 | int i; |
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48 | int y = (int)arg; |
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49 | |||
50 | for (i = 19; i < 60; i++) { |
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51 | puts_xy(i,y,7,"*"); |
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52 | |||
53 | task_endcycle(); |
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54 | } |
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55 | |||
56 | return 0; |
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57 | } |
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58 | |||
59 | void *blocker(void *arg) |
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60 | { |
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61 | struct timespec t; |
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62 | |||
63 | task_nopreempt(); |
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64 | cprintf("Blocker: Task nopreempt\n"); |
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65 | |||
66 | do { |
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67 | sys_gettime(&t); |
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68 | } while (t.tv_sec < 5); |
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69 | |||
70 | cprintf("Blocker: Task preempt\n"); |
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71 | task_preempt(); |
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72 | |||
73 | cprintf("Blocker: end\n"); |
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74 | |||
75 | return 0; |
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76 | } |
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77 | |||
78 | |||
79 | |||
80 | int main(int argc, char **argv) |
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81 | { |
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82 | struct timespec t; |
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83 | NRT_TASK_MODEL m; |
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84 | SOFT_TASK_MODEL m_aper; |
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85 | PID p; |
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86 | |||
87 | clear(); |
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88 | cprintf("Preemption Test.\n"); |
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89 | cprintf("Start time: two periodic tasks and a blocker are created and activated.\n"); |
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90 | cprintf("2 seconds : blocker calls task_nopreempt.\n"); |
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91 | cprintf("5 seconds : task_preempt is called.\n"); |
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92 | cprintf(" The blocked task exec its pending activations.\n"); |
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93 | cprintf("10 seconds: the test stops.\n"); |
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94 | puts_xy(1,20,7,"save task:"); |
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95 | puts_xy(1,21,7,"skip task:"); |
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96 | |||
97 | nrt_task_default_model(m); |
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98 | |||
99 | soft_task_default_model(m_aper); |
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100 | soft_task_def_met(m_aper,10000); |
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101 | soft_task_def_period(m_aper,200000); |
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102 | soft_task_def_group(m_aper,1); |
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103 | soft_task_def_arg(m_aper, (void *)20); |
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104 | soft_task_def_periodic(m_aper); |
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105 | |||
106 | p = task_create("save", periodic, &m_aper, NULL); |
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107 | if (p == NIL) |
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108 | { |
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109 | perror("Can't create save task...\n"); |
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110 | sys_end(); |
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111 | } |
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112 | |||
113 | soft_task_def_skip_arrivals(m_aper); |
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114 | soft_task_def_arg(m_aper, (void *)21); |
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115 | |||
116 | p = task_create("skip", periodic, &m_aper, NULL); |
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117 | if (p == NIL) |
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118 | { |
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119 | perror("Can't create skip task...\n"); |
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120 | sys_end(); |
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121 | } |
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122 | |||
123 | p = task_create("blocker", blocker, &m, NULL); |
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124 | if (p == NIL) |
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125 | { |
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126 | perror("Can't create blocker task...\n"); |
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127 | sys_end(); |
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128 | } |
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129 | |||
130 | cprintf("main : save & skip tasks activated.\n"); |
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131 | group_activate(1); |
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132 | |||
133 | do { |
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134 | sys_gettime(&t); |
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135 | } while (t.tv_sec < 2); |
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136 | |||
137 | cprintf("main : blocker activated.\n"); |
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138 | task_activate(p); |
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139 | |||
140 | do { |
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141 | sys_gettime(&t); |
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142 | } while (t.tv_sec < 10); |
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143 | |||
144 | cprintf("main : End!!!\n"); |
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145 | |||
146 | return 0; |
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147 | } |