1 | /** |
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2 | * @copyright |
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3 | * ==================================================================== |
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4 | * Copyright (c) 2003 CollabNet. All rights reserved. |
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5 | * |
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6 | * This software is licensed as described in the file COPYING, which |
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7 | * you should have received as part of this distribution. The terms |
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8 | * are also available at http://subversion.tigris.org/license-1.html. |
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9 | * If newer versions of this license are posted there, you may use a |
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10 | * newer version instead, at your option. |
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11 | * |
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12 | * This software consists of voluntary contributions made by many |
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13 | * individuals. For exact contribution history, see the revision |
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14 | * history and logs, available at http://subversion.tigris.org/. |
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15 | * ==================================================================== |
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16 | * @endcopyright |
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17 | * |
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18 | * @file JNIThreadData.cpp |
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19 | * @brief Implementation of the class JNIThreadData |
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20 | */ |
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21 | |
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22 | #include "JNIThreadData.h" |
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23 | #include <apr_strings.h> |
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24 | #include <apr_tables.h> |
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25 | #include <apr_general.h> |
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26 | #include <apr_lib.h> |
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27 | #include <apr_thread_proc.h> |
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28 | #include "JNIUtil.h" |
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29 | |
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30 | apr_threadkey_t *JNIThreadData::g_key; |
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31 | |
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32 | /** |
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33 | * Create and initialize a new object. |
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34 | */ |
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35 | JNIThreadData::JNIThreadData() |
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36 | { |
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37 | m_env = NULL; |
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38 | m_exceptionThrown = false; |
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39 | m_requestPool = NULL; |
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40 | m_previous = NULL; |
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41 | } |
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42 | |
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43 | JNIThreadData::~JNIThreadData() |
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44 | { |
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45 | } |
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46 | |
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47 | /** |
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48 | * Initialize the thread local storage. |
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49 | * @return success or failure |
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50 | */ |
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51 | bool JNIThreadData::initThreadData() |
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52 | { |
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53 | // If already initialized -> nothing to do. |
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54 | if (g_key != NULL) |
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55 | return false; |
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56 | |
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57 | // Request a key for the thread local storage from the global pool |
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58 | // and register a callback function called when the thread is |
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59 | // deleted. |
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60 | apr_status_t apr_err = apr_threadkey_private_create(&g_key, |
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61 | del, |
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62 | JNIUtil::getPool()); |
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63 | if (apr_err) |
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64 | { |
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65 | JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_create"); |
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66 | return false; |
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67 | } |
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68 | |
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69 | return true; |
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70 | } |
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71 | |
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72 | /** |
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73 | * Get the thread local storage for this thread. |
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74 | * @return thread local storage |
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75 | */ |
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76 | JNIThreadData *JNIThreadData::getThreadData() |
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77 | { |
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78 | // We should never be called before initThreadData |
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79 | if (g_key == NULL) |
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80 | return NULL; |
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81 | |
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82 | // Retrieve the thread local storage from APR. |
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83 | JNIThreadData *data = NULL; |
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84 | apr_status_t apr_err = apr_threadkey_private_get |
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85 | (reinterpret_cast<void**>(&data), g_key); |
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86 | if (apr_err) |
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87 | { |
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88 | JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_get"); |
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89 | return NULL; |
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90 | } |
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91 | |
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92 | // Not already allocated. |
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93 | if (data == NULL) |
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94 | { |
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95 | // Allocate and store to APR. |
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96 | data = new JNIThreadData; |
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97 | apr_err = apr_threadkey_private_set (data, g_key); |
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98 | if (apr_err) |
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99 | { |
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100 | JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_set"); |
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101 | return NULL; |
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102 | } |
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103 | } |
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104 | return data; |
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105 | } |
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106 | |
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107 | /** |
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108 | * Allocate a new ThreadData for the current call from Java and push |
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109 | * it on the stack |
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110 | */ |
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111 | void JNIThreadData::pushNewThreadData() |
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112 | { |
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113 | JNIThreadData *data = NULL; |
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114 | apr_status_t apr_err = apr_threadkey_private_get |
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115 | (reinterpret_cast<void**>(&data), g_key); |
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116 | if (apr_err) |
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117 | { |
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118 | JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_get"); |
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119 | return; |
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120 | } |
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121 | JNIThreadData *newData = new JNIThreadData(); |
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122 | newData->m_previous =data; |
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123 | apr_err = apr_threadkey_private_set (newData, g_key); |
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124 | if (apr_err) |
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125 | { |
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126 | JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_set"); |
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127 | return; |
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128 | } |
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129 | } |
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130 | |
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131 | /** |
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132 | * Pop the current ThreadData from the stack, because the call |
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133 | * completed. |
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134 | */ |
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135 | void JNIThreadData::popThreadData() |
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136 | { |
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137 | JNIThreadData *data = NULL; |
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138 | apr_status_t apr_err = apr_threadkey_private_get |
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139 | (reinterpret_cast<void**>(&data), g_key); |
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140 | if (apr_err) |
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141 | { |
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142 | JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_get"); |
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143 | return; |
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144 | } |
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145 | if (data == NULL) |
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146 | return; |
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147 | |
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148 | JNIThreadData *oldData = data->m_previous; |
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149 | delete data; |
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150 | apr_err = apr_threadkey_private_set (oldData, g_key); |
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151 | if (apr_err) |
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152 | { |
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153 | JNIUtil::handleAPRError(apr_err, "apr_threadkey_private_set"); |
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154 | return; |
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155 | } |
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156 | } |
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157 | |
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158 | /** |
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159 | * Callback called by APR when the thread dies. Deletes the thread |
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160 | * local storage. |
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161 | */ |
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162 | void JNIThreadData::del(void *p) |
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163 | { |
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164 | delete reinterpret_cast<JNIThreadData*>(p); |
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165 | } |
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