1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup rtems_bsd_rtems |
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5 | * |
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6 | * @brief TODO. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2009, 2010 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * embedded brains GmbH |
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13 | * Obere Lagerstr. 30 |
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14 | * 82178 Puchheim |
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15 | * Germany |
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16 | * <rtems@embedded-brains.de> |
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17 | * |
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18 | * The license and distribution terms for this file may be |
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19 | * found in the file LICENSE in this distribution or at |
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20 | * http://www.rtems.com/license/LICENSE. |
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21 | */ |
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22 | |
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23 | #include <rtems/freebsd/machine/rtems-bsd-config.h> |
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24 | |
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25 | #include <rtems/freebsd/sys/param.h> |
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26 | #include <rtems/freebsd/sys/types.h> |
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27 | #include <rtems/freebsd/sys/systm.h> |
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28 | #include <rtems/freebsd/sys/proc.h> |
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29 | #include <rtems/freebsd/sys/kthread.h> |
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30 | #include <rtems/freebsd/sys/malloc.h> |
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31 | |
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32 | RTEMS_CHAIN_DEFINE_EMPTY(rtems_bsd_thread_chain); |
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33 | |
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34 | static int |
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35 | rtems_bsd_thread_start(struct thread **td_ptr, void (*func)(void *), void *arg, int flags, int pages, const char *fmt, va_list ap) |
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36 | { |
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37 | struct proc *p = &proc0;; |
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38 | struct thread *td = malloc(sizeof(struct thread), M_TEMP, M_WAITOK | M_ZERO); |
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39 | |
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40 | if (td != NULL) { |
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41 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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42 | rtems_id id = RTEMS_ID_NONE; |
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43 | unsigned index = 0; |
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44 | char name [5] = "_???"; |
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45 | |
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46 | BSD_ASSERT(pages >= 0); |
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47 | |
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48 | sc = rtems_task_create( |
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49 | rtems_build_name('_', 'T', 'S', 'K'), |
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50 | BSD_TASK_PRIORITY_NORMAL, |
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51 | BSD_MINIMUM_TASK_STACK_SIZE + (size_t) pages * PAGE_SIZE, |
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52 | RTEMS_DEFAULT_ATTRIBUTES, |
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53 | RTEMS_DEFAULT_ATTRIBUTES, |
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54 | &id |
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55 | ); |
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56 | if (sc != RTEMS_SUCCESSFUL) { |
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57 | free(td, M_TEMP); |
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58 | |
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59 | return ENOMEM; |
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60 | } |
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61 | |
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62 | sc = rtems_task_set_note( id, RTEMS_NOTEPAD_0, ( uint32_t )td ); |
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63 | if (sc != RTEMS_SUCCESSFUL) { |
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64 | free(td, M_TEMP); |
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65 | |
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66 | return ENOMEM; |
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67 | } |
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68 | |
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69 | index = rtems_object_id_get_index(id); |
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70 | snprintf(name + 1, sizeof(name) - 1, "%03u", index); |
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71 | sc = rtems_object_set_name(id, name); |
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72 | if (sc != RTEMS_SUCCESSFUL) { |
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73 | rtems_task_delete(id); |
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74 | free(td, M_TEMP); |
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75 | |
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76 | return ENOMEM; |
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77 | } |
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78 | |
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79 | sc = rtems_task_start(id, (rtems_task_entry) func, (rtems_task_argument) arg); |
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80 | if (sc != RTEMS_SUCCESSFUL) { |
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81 | rtems_task_delete(id); |
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82 | free(td, M_TEMP); |
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83 | |
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84 | return ENOMEM; |
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85 | } |
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86 | |
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87 | td->td_id = id; |
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88 | vsnprintf(td->td_name, sizeof(td->td_name), fmt, ap); |
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89 | bzero(&td->td_ru, sizeof(td->td_ru)); |
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90 | td->td_ucred = crhold(p->p_ucred); |
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91 | td->td_proc = p; |
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92 | |
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93 | rtems_chain_append(&rtems_bsd_thread_chain, &td->td_node); |
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94 | |
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95 | if (td_ptr != NULL) { |
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96 | *td_ptr = td; |
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97 | } |
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98 | |
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99 | return 0; |
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100 | } |
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101 | |
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102 | return ENOMEM; |
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103 | } |
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104 | |
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105 | static void rtems_bsd_thread_delete(void) __dead2; |
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106 | |
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107 | static void |
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108 | rtems_bsd_thread_delete(void) |
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109 | { |
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110 | rtems_chain_control *chain = &rtems_bsd_thread_chain; |
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111 | rtems_chain_node *node = rtems_chain_first(chain); |
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112 | rtems_id id = rtems_task_self(); |
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113 | struct thread *td = NULL; |
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114 | |
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115 | while (!rtems_chain_is_tail(chain, node)) { |
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116 | struct thread *cur = (struct thread *) node; |
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117 | |
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118 | if (cur->td_id == id) { |
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119 | td = cur; |
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120 | break; |
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121 | } |
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122 | |
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123 | node = rtems_chain_next(node); |
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124 | } |
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125 | |
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126 | if (td != NULL) { |
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127 | rtems_chain_extract(&td->td_node); |
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128 | |
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129 | free(td, M_TEMP); |
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130 | } else { |
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131 | BSD_PANIC("cannot find task entry"); |
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132 | } |
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133 | |
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134 | rtems_task_delete(RTEMS_SELF); |
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135 | |
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136 | while (true) { |
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137 | /* Do nothing */ |
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138 | } |
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139 | } |
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140 | |
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141 | void |
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142 | kproc_start(const void *udata) |
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143 | { |
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144 | const struct kproc_desc *pd = udata; |
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145 | int eno = kproc_create((void (*)(void *))pd->func, NULL, pd->global_procpp, 0, 0, "%s", pd->arg0); |
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146 | |
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147 | BSD_ASSERT(eno == 0); |
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148 | } |
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149 | |
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150 | int |
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151 | kproc_create(void (*func)(void *), void *arg, struct proc **newpp, int flags, int pages, const char *fmt, ...) |
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152 | { |
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153 | int eno = 0; |
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154 | va_list ap; |
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155 | |
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156 | va_start(ap, fmt); |
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157 | eno = rtems_bsd_thread_start(newpp, func, arg, flags, pages, fmt, ap); |
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158 | va_end(ap); |
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159 | |
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160 | return eno; |
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161 | } |
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162 | |
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163 | void |
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164 | kproc_exit(int ecode) |
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165 | { |
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166 | rtems_bsd_thread_delete(); |
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167 | } |
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168 | |
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169 | void |
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170 | kthread_start(const void *udata) |
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171 | { |
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172 | const struct kthread_desc *td = udata; |
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173 | int eno = kthread_add((void (*)(void *)) td->func, NULL, NULL, td->global_threadpp, 0, 0, "%s", td->arg0); |
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174 | |
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175 | BSD_ASSERT(eno == 0); |
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176 | } |
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177 | |
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178 | int |
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179 | kthread_add(void (*func)(void *), void *arg, struct proc *p, struct thread **newtdp, int flags, int pages, const char *fmt, ...) |
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180 | { |
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181 | int eno = 0; |
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182 | va_list ap; |
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183 | |
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184 | va_start(ap, fmt); |
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185 | eno = rtems_bsd_thread_start(newtdp, func, arg, flags, pages, fmt, ap); |
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186 | va_end(ap); |
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187 | |
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188 | return eno; |
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189 | } |
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190 | |
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191 | void |
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192 | kthread_exit(void) |
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193 | { |
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194 | rtems_bsd_thread_delete(); |
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195 | } |
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196 | |
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197 | int |
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198 | kproc_kthread_add(void (*func)(void *), void *arg, struct proc **procptr, struct thread **tdptr, int flags, int pages, const char * procname, const char *fmt, ...) |
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199 | { |
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200 | int eno = 0; |
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201 | va_list ap; |
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202 | |
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203 | va_start(ap, fmt); |
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204 | eno = rtems_bsd_thread_start(tdptr, func, arg, flags, pages, fmt, ap); |
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205 | va_end(ap); |
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206 | |
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207 | return eno; |
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208 | } |
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