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recreate repository without any libs for lightweight repository
author Frank Benoit <benoit@tionex.de>
date Sat, 20 Oct 2007 18:07:18 +0200
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a5576806d36d recreate repository without any libs for lightweight repository
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1 /* -*- mode: C; c-file-style: "gnu" -*- */
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2 /* dbus-threads.h D-Bus threads handling
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3 *
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4 * Copyright (C) 2002 Red Hat Inc.
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5 *
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6 * Licensed under the Academic Free License version 2.1
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7 *
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8 * This program is free software; you can redistribute it and/or modify
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9 * it under the terms of the GNU General Public License as published by
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10 * the Free Software Foundation; either version 2 of the License, or
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11 * (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful,
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 * GNU General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU General Public License
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19 * along with this program; if not, write to the Free Software
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20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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21 *
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22 */
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23 module org.freedesktop.dbus.c.Threads;
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24
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25 import org.freedesktop.dbus.c.Types;
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26
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27 extern(C):
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28 /**
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29 * @addtogroup DBusThreads
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30 * @{
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31 */
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32
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33 /** An opaque mutex type provided by the #DBusThreadFunctions implementation installed by dbus_threads_init(). */
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34 struct DBusMutex {};
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35 /** An opaque condition variable type provided by the #DBusThreadFunctions implementation installed by dbus_threads_init(). */
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36 struct DBusCondVar {};
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37
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38 /** Deprecated, provide DBusRecursiveMutexNewFunction instead. */
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39 alias DBusMutex* (* DBusMutexNewFunction) ();
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40 /** Deprecated, provide DBusRecursiveMutexFreeFunction instead. */
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41 alias void (* DBusMutexFreeFunction) (DBusMutex *mutex);
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42 /** Deprecated, provide DBusRecursiveMutexLockFunction instead. Return value is lock success, but gets ignored in practice. */
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43 alias dbus_bool_t (* DBusMutexLockFunction) (DBusMutex *mutex);
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44 /** Deprecated, provide DBusRecursiveMutexUnlockFunction instead. Return value is unlock success, but gets ignored in practice. */
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45 alias dbus_bool_t (* DBusMutexUnlockFunction) (DBusMutex *mutex);
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46
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47 /** Creates a new recursively-lockable mutex, or returns #NULL if not
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48 * enough memory. Can only fail due to lack of memory. Found in
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49 * #DBusThreadFunctions. Do not just use PTHREAD_MUTEX_RECURSIVE for
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50 * this, because it does not save/restore the recursion count when
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51 * waiting on a condition. libdbus requires the Java-style behavior
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52 * where the mutex is fully unlocked to wait on a condition.
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53 */
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54 alias DBusMutex* (* DBusRecursiveMutexNewFunction) ();
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55 /** Frees a recursively-lockable mutex. Found in #DBusThreadFunctions.
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56 */
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57 alias void (* DBusRecursiveMutexFreeFunction) (DBusMutex *mutex);
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58 /** Locks a recursively-lockable mutex. Found in #DBusThreadFunctions.
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59 * Can only fail due to lack of memory.
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60 */
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61 alias void (* DBusRecursiveMutexLockFunction) (DBusMutex *mutex);
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62 /** Unlocks a recursively-lockable mutex. Found in #DBusThreadFunctions.
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63 * Can only fail due to lack of memory.
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64 */
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65 alias void (* DBusRecursiveMutexUnlockFunction) (DBusMutex *mutex);
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66
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67 /** Creates a new condition variable. Found in #DBusThreadFunctions.
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68 * Can only fail (returning #NULL) due to lack of memory.
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69 */
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70 alias DBusCondVar* (* DBusCondVarNewFunction) ();
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71 /** Frees a condition variable. Found in #DBusThreadFunctions.
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72 */
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73 alias void (* DBusCondVarFreeFunction) (DBusCondVar *cond);
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74
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75 /** Waits on a condition variable. Found in
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76 * #DBusThreadFunctions. Must work with either a recursive or
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77 * nonrecursive mutex, whichever the thread implementation
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78 * provides. Note that PTHREAD_MUTEX_RECURSIVE does not work with
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79 * condition variables (does not save/restore the recursion count) so
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80 * don't try using simply pthread_cond_wait() and a
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81 * PTHREAD_MUTEX_RECURSIVE to implement this, it won't work right.
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82 *
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83 * Has no error conditions. Must succeed if it returns.
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84 */
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85 alias void (* DBusCondVarWaitFunction) (DBusCondVar *cond,
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86 DBusMutex *mutex);
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87
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88 /** Waits on a condition variable with a timeout. Found in
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89 * #DBusThreadFunctions. Returns #TRUE if the wait did not
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90 * time out, and #FALSE if it did.
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91 *
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92 * Has no error conditions. Must succeed if it returns.
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93 */
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94 alias dbus_bool_t (* DBusCondVarWaitTimeoutFunction) (DBusCondVar *cond,
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95 DBusMutex *mutex,
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96 int timeout_milliseconds);
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97 /** Wakes one waiting thread on a condition variable. Found in #DBusThreadFunctions.
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98 *
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99 * Has no error conditions. Must succeed if it returns.
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100 */
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101 alias void (* DBusCondVarWakeOneFunction) (DBusCondVar *cond);
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102
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103 /** Wakes all waiting threads on a condition variable. Found in #DBusThreadFunctions.
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104 *
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105 * Has no error conditions. Must succeed if it returns.
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106 */
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107 alias void (* DBusCondVarWakeAllFunction) (DBusCondVar *cond);
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108
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109 /**
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110 * Flags indicating which functions are present in #DBusThreadFunctions. Used to allow
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111 * the library to detect older callers of dbus_threads_init() if new possible functions
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112 * are added to #DBusThreadFunctions.
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113 */
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114 enum DBusThreadFunctionsMask{
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115 DBUS_THREAD_FUNCTIONS_MUTEX_NEW_MASK = 1 << 0,
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116 DBUS_THREAD_FUNCTIONS_MUTEX_FREE_MASK = 1 << 1,
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117 DBUS_THREAD_FUNCTIONS_MUTEX_LOCK_MASK = 1 << 2,
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118 DBUS_THREAD_FUNCTIONS_MUTEX_UNLOCK_MASK = 1 << 3,
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119 DBUS_THREAD_FUNCTIONS_CONDVAR_NEW_MASK = 1 << 4,
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120 DBUS_THREAD_FUNCTIONS_CONDVAR_FREE_MASK = 1 << 5,
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121 DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_MASK = 1 << 6,
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122 DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_TIMEOUT_MASK = 1 << 7,
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123 DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ONE_MASK = 1 << 8,
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124 DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ALL_MASK = 1 << 9,
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125 DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_NEW_MASK = 1 << 10,
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126 DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_FREE_MASK = 1 << 11,
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127 DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_LOCK_MASK = 1 << 12,
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128 DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_UNLOCK_MASK = 1 << 13,
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129 DBUS_THREAD_FUNCTIONS_ALL_MASK = (1 << 14) - 1
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130 } ;
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131
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132 /**
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133 * Functions that must be implemented to make the D-Bus library
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134 * thread-aware. The recursive mutex functions should be specified
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135 * rather than the old, deprecated nonrecursive ones.
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136 *
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137 * The condition variable functions have to work with recursive
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138 * mutexes if you provide those, or with nonrecursive mutexes if you
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139 * provide those.
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140 *
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141 * If implementing threads using pthreads, be aware that
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142 * PTHREAD_MUTEX_RECURSIVE is broken in combination with condition
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143 * variables. libdbus relies on the Java-style behavior that when
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144 * waiting on a condition, the recursion count is saved and restored,
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145 * and the mutex is completely unlocked, not just decremented one
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146 * level of recursion.
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147 *
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148 * Thus with pthreads you probably have to roll your own emulated
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149 * recursive mutexes, you can't use PTHREAD_MUTEX_RECURSIVE. This is
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150 * what dbus_threads_init_default() does on platforms that use
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151 * pthreads.
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152 */
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153 struct DBusThreadFunctions{
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154 uint mask; /**< Mask indicating which functions are present. */
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155
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156 DBusMutexNewFunction mutex_new; /**< Function to create a mutex; optional and deprecated. */
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157 DBusMutexFreeFunction mutex_free; /**< Function to free a mutex; optional and deprecated. */
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158 DBusMutexLockFunction mutex_lock; /**< Function to lock a mutex; optional and deprecated. */
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159 DBusMutexUnlockFunction mutex_unlock; /**< Function to unlock a mutex; optional and deprecated. */
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160
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161 DBusCondVarNewFunction condvar_new; /**< Function to create a condition variable */
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162 DBusCondVarFreeFunction condvar_free; /**< Function to free a condition variable */
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163 DBusCondVarWaitFunction condvar_wait; /**< Function to wait on a condition */
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164 DBusCondVarWaitTimeoutFunction condvar_wait_timeout; /**< Function to wait on a condition with a timeout */
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165 DBusCondVarWakeOneFunction condvar_wake_one; /**< Function to wake one thread waiting on the condition */
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166 DBusCondVarWakeAllFunction condvar_wake_all; /**< Function to wake all threads waiting on the condition */
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167
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168 DBusRecursiveMutexNewFunction recursive_mutex_new; /**< Function to create a recursive mutex */
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169 DBusRecursiveMutexFreeFunction recursive_mutex_free; /**< Function to free a recursive mutex */
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170 DBusRecursiveMutexLockFunction recursive_mutex_lock; /**< Function to lock a recursive mutex */
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171 DBusRecursiveMutexUnlockFunction recursive_mutex_unlock; /**< Function to unlock a recursive mutex */
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172
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173 void (* padding1) (); /**< Reserved for future expansion */
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174 void (* padding2) (); /**< Reserved for future expansion */
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175 void (* padding3) (); /**< Reserved for future expansion */
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176 void (* padding4) (); /**< Reserved for future expansion */
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177
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178 } ;
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179
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180 dbus_bool_t dbus_threads_init (DBusThreadFunctions *functions);
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181 dbus_bool_t dbus_threads_init_default ();
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182
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183 /** @} */
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184