1 | /* |
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2 | * COPYRIGHT (c) 1989-2009. |
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3 | * On-Line Applications Research Corporation (OAR). |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.org/license/LICENSE. |
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8 | */ |
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9 | |
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10 | #ifdef HAVE_CONFIG_H |
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11 | #include "config.h" |
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12 | #endif |
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13 | |
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14 | #include <sched.h> |
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15 | |
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16 | #define CONFIGURE_INIT |
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17 | #include "system.h" |
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18 | #include <errno.h> |
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19 | #include "pritime.h" |
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20 | |
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21 | const char rtems_test_name[] = "PSX 9"; |
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22 | |
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23 | void print_schedparam( |
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24 | char *prefix, |
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25 | struct sched_param *schedparam |
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26 | ); |
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27 | |
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28 | int HIGH_PRIORITY; |
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29 | int MEDIUM_PRIORITY; |
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30 | int LOW_PRIORITY; |
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31 | |
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32 | void print_schedparam( |
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33 | char *prefix, |
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34 | struct sched_param *schedparam |
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35 | ) |
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36 | { |
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37 | printf( "%ssched priority = %d\n", prefix, schedparam->sched_priority ); |
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38 | #if defined(_POSIX_SPORADIC_SERVER) |
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39 | printf( "%ssched_ss_low_priority = %d\n", |
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40 | prefix, schedparam->sched_ss_low_priority ); |
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41 | printf( "%ssched_ss_repl_period = (%" PRIdtime_t ", %ld)\n", prefix, |
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42 | schedparam->sched_ss_repl_period.tv_sec, |
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43 | schedparam->sched_ss_repl_period.tv_nsec ); |
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44 | printf( "%ssched_ss_init_budget = (%" PRIdtime_t ", %ld)\n", prefix, |
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45 | schedparam->sched_ss_init_budget.tv_sec, |
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46 | schedparam->sched_ss_init_budget.tv_nsec ); |
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47 | #else |
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48 | printf( "%s_POSIX_SPORADIC_SERVER is not defined\n", prefix ); |
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49 | #endif |
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50 | } |
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51 | |
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52 | static void *mutex_lock_task(void *arg) |
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53 | { |
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54 | pthread_mutex_t *mtx; |
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55 | int eno; |
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56 | |
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57 | mtx = arg; |
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58 | |
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59 | eno = pthread_mutex_lock( mtx ); |
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60 | rtems_test_assert( eno == 0 ); |
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61 | |
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62 | sched_yield(); |
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63 | |
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64 | eno = pthread_mutex_unlock( mtx ); |
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65 | rtems_test_assert( eno == 0 ); |
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66 | |
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67 | return NULL; |
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68 | } |
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69 | |
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70 | static void test_destroy_locked_mutex(void) |
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71 | { |
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72 | pthread_mutex_t mtx; |
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73 | pthread_t th; |
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74 | int eno; |
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75 | |
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76 | eno = pthread_mutex_init( &mtx, NULL ); |
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77 | rtems_test_assert( eno == 0 ); |
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78 | |
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79 | eno = pthread_create( &th, NULL, mutex_lock_task, &mtx ); |
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80 | rtems_test_assert( eno == 0 ); |
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81 | |
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82 | sched_yield(); |
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83 | |
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84 | eno = pthread_mutex_destroy( &mtx ); |
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85 | rtems_test_assert( eno == EBUSY ); |
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86 | |
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87 | sched_yield(); |
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88 | |
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89 | eno = pthread_mutex_destroy( &mtx ); |
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90 | rtems_test_assert( eno == 0 ); |
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91 | |
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92 | eno = pthread_join( th, NULL ); |
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93 | rtems_test_assert( eno == 0 ); |
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94 | } |
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95 | |
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96 | void *POSIX_Init( |
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97 | void *argument |
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98 | ) |
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99 | { |
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100 | int status; |
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101 | int passes; |
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102 | int schedpolicy; |
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103 | int priority; |
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104 | struct sched_param schedparam; |
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105 | char buffer[ 80 ]; |
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106 | pthread_mutexattr_t attr; |
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107 | time_t start; |
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108 | time_t now; |
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109 | |
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110 | TEST_BEGIN(); |
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111 | |
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112 | test_destroy_locked_mutex(); |
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113 | |
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114 | /* set the time of day, and print our buffer in multiple ways */ |
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115 | |
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116 | set_time( TM_FRIDAY, TM_MAY, 24, 96, 11, 5, 0 ); |
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117 | |
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118 | /* get id of this thread */ |
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119 | |
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120 | Init_id = pthread_self(); |
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121 | printf( "Init's ID is 0x%08" PRIxpthread_t "\n", Init_id ); |
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122 | |
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123 | /* try to use this thread as a sporadic server */ |
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124 | |
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125 | puts( "Init: pthread_getschedparam - SUCCESSFUL" ); |
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126 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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127 | rtems_test_assert( !status ); |
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128 | |
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129 | priority = schedparam.sched_priority; |
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130 | sprintf( buffer, " - current priority = %d", priority ); |
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131 | print_current_time( "Init: ", buffer ); |
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132 | |
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133 | schedparam.sched_ss_repl_period.tv_sec = 0; |
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134 | schedparam.sched_ss_repl_period.tv_nsec = 500000000; /* 1/2 second */ |
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135 | schedparam.sched_ss_init_budget.tv_sec = 0; |
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136 | schedparam.sched_ss_init_budget.tv_nsec = 250000000; /* 1/4 second */ |
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137 | |
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138 | schedparam.sched_priority = sched_get_priority_max(SCHED_SPORADIC); |
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139 | schedparam.sched_ss_low_priority = sched_get_priority_max(SCHED_SPORADIC) - 2; |
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140 | |
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141 | puts( "Init: pthread_setschedparam - SUCCESSFUL (sporadic server)" ); |
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142 | status = pthread_setschedparam( pthread_self(), SCHED_SPORADIC, &schedparam ); |
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143 | rtems_test_assert( !status ); |
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144 | |
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145 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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146 | rtems_test_assert( !status ); |
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147 | |
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148 | priority = schedparam.sched_priority; |
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149 | sprintf( buffer, " - new priority = %d", priority ); |
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150 | print_current_time( "Init: ", buffer ); |
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151 | |
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152 | /* go into a loop consuming CPU time to watch our priority change */ |
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153 | |
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154 | for ( passes=0 ; passes <= 3 ; ) { |
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155 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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156 | rtems_test_assert( !status ); |
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157 | |
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158 | if ( priority != schedparam.sched_priority ) { |
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159 | priority = schedparam.sched_priority; |
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160 | sprintf( buffer, " - new priority = %d", priority ); |
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161 | print_current_time( "Init: ", buffer ); |
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162 | passes++; |
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163 | } |
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164 | } |
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165 | |
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166 | /* now see if this works if we are holding a priority ceiling mutex */ |
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167 | |
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168 | empty_line(); |
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169 | |
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170 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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171 | rtems_test_assert( !status ); |
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172 | |
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173 | schedparam.sched_ss_repl_period.tv_sec = 0; |
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174 | schedparam.sched_ss_repl_period.tv_nsec = 500000000; /* 1/2 second */ |
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175 | schedparam.sched_ss_init_budget.tv_sec = 0; |
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176 | schedparam.sched_ss_init_budget.tv_nsec = 250000000; /* 1/4 second */ |
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177 | |
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178 | HIGH_PRIORITY = sched_get_priority_max( SCHED_SPORADIC ); |
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179 | MEDIUM_PRIORITY = sched_get_priority_max( SCHED_SPORADIC ) - 2; |
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180 | LOW_PRIORITY = sched_get_priority_max( SCHED_SPORADIC ) - 4; |
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181 | |
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182 | schedparam.sched_priority = HIGH_PRIORITY; |
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183 | schedparam.sched_ss_low_priority = LOW_PRIORITY; |
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184 | |
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185 | puts( "Init: pthread_setschedparam - SUCCESSFUL (sporadic server)" ); |
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186 | status = pthread_setschedparam( pthread_self(), SCHED_SPORADIC, &schedparam ); |
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187 | rtems_test_assert( !status ); |
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188 | |
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189 | puts( "Init: Initializing mutex attributes for priority ceiling" ); |
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190 | status = pthread_mutexattr_init( &attr ); |
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191 | rtems_test_assert( !status ); |
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192 | |
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193 | status = pthread_mutexattr_setprotocol( &attr, PTHREAD_PRIO_INHERIT ); |
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194 | rtems_test_assert( !status ); |
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195 | |
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196 | puts( "Init: Creating a mutex" ); |
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197 | status = pthread_mutex_init( &Mutex_id, &attr ); |
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198 | if ( status ) |
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199 | printf( "status = %d\n", status ); |
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200 | rtems_test_assert( !status ); |
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201 | |
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202 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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203 | rtems_test_assert( !status ); |
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204 | |
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205 | priority = schedparam.sched_priority; |
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206 | sprintf( buffer, " - new priority = %d", priority ); |
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207 | print_current_time( "Init: ", buffer ); |
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208 | |
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209 | /* go into a loop consuming CPU time to watch our priority NOT lower */ |
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210 | |
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211 | start = time( &start ); |
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212 | |
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213 | puts( "Init: pthread_mutex_lock acquire the lock" ); |
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214 | status = pthread_mutex_lock( &Mutex_id ); |
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215 | if ( status ) |
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216 | printf( "status = %d %s\n", status, strerror(status) ); |
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217 | rtems_test_assert( !status ); |
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218 | |
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219 | for ( ; ; ) { |
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220 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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221 | rtems_test_assert( !status ); |
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222 | |
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223 | if ( schedparam.sched_priority == LOW_PRIORITY ) { |
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224 | puts( "ERROR - Init's priority lowered while holding mutex" ); |
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225 | rtems_test_exit(0); |
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226 | } |
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227 | |
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228 | now = time( &now ); |
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229 | if ( now - start > 3 ) |
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230 | break; |
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231 | |
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232 | priority = schedparam.sched_priority; |
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233 | sprintf( buffer, " - new priority = %d", priority ); |
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234 | print_current_time( "Init: ", buffer ); |
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235 | |
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236 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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237 | rtems_test_assert( !status ); |
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238 | |
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239 | priority = schedparam.sched_priority; |
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240 | sprintf( buffer, " - new priority = %d", priority ); |
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241 | print_current_time( "Init: ", buffer ); |
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242 | |
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243 | break; |
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244 | } |
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245 | |
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246 | /* with this unlock we should be able to go to low priority */ |
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247 | |
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248 | puts( "Init: unlock mutex" ); |
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249 | status = pthread_mutex_unlock( &Mutex_id ); |
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250 | if ( status ) |
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251 | printf( "status = %d\n", status ); |
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252 | rtems_test_assert( !status ); |
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253 | |
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254 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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255 | rtems_test_assert( !status ); |
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256 | |
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257 | priority = schedparam.sched_priority; |
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258 | sprintf( buffer, " - new priority = %d", priority ); |
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259 | print_current_time( "Init: ", buffer ); |
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260 | |
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261 | for ( ; ; ) { |
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262 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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263 | rtems_test_assert( !status ); |
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264 | |
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265 | if ( schedparam.sched_priority == LOW_PRIORITY ) |
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266 | break; |
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267 | } |
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268 | |
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269 | status = pthread_getschedparam( pthread_self(), &schedpolicy, &schedparam ); |
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270 | rtems_test_assert( !status ); |
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271 | |
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272 | priority = schedparam.sched_priority; |
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273 | sprintf( buffer, " - new priority = %d", priority ); |
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274 | print_current_time( "Init: ", buffer ); |
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275 | |
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276 | TEST_END(); |
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277 | rtems_test_exit( 0 ); |
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278 | |
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279 | return NULL; /* just so the compiler thinks we returned something */ |
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280 | } |
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