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annotate xwrited-unique.c @ 0:52694b49dcc4

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Initial revision
author Guido Berhoerster <guido+xwrited@berhoerster.name>
date Sun, 27 Apr 2014 23:07:51 +0200
parents
children c53bcdabbba7
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0
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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diff changeset
1 /*
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2 * Copyright (C) 2011 Guido Berhoerster <guido+xwrited@berhoerster.name>
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3 *
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4 * Permission is hereby granted, free of charge, to any person obtaining
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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5 * a copy of this software and associated documentation files (the
52694b49dcc4 Initial revision
Guido Berhoerster <guido+xwrited@berhoerster.name>
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6 * "Software"), to deal in the Software without restriction, including
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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7 * without limitation the rights to use, copy, modify, merge, publish,
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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8 * distribute, sublicense, and/or sell copies of the Software, and to
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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9 * permit persons to whom the Software is furnished to do so, subject to
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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10 * the following conditions:
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11 *
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12 * The above copyright notice and this permission notice shall be included
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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13 * in all copies or substantial portions of the Software.
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14 *
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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Guido Berhoerster <guido+xwrited@berhoerster.name>
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21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 */
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23
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24 #define _XOPEN_SOURCE 600
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25
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26 #include <glib.h>
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27 #include <dbus/dbus-glib.h>
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28 #include <dbus/dbus.h>
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29
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30 #include "xwrited-unique.h"
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31
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32 G_DEFINE_TYPE(XWritedUnique, xwrited_unique, G_TYPE_OBJECT)
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33
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34 #define XWRITED_UNIQUE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), \
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35 XWRITED_TYPE_UNIQUE, XWritedUniquePrivate))
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36
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37 struct _XWritedUniquePrivate {
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38 DBusGConnection *session_bus;
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39 DBusGProxy *session_bus_proxy;
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40 gchar *name;
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41 gboolean is_unique;
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42 };
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43
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44 enum {
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45 PROP_0,
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46 PROP_NAME,
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47 PROP_IS_XWRITED_UNIQUE
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48 };
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49
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50 static gboolean
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51 request_name(XWritedUnique *self)
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52 {
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53 guint32 request_name_response;
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54 GError *error = NULL;
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55
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56 g_return_val_if_fail(self->priv->session_bus != NULL, FALSE);
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57 g_return_val_if_fail(self->priv->session_bus_proxy != NULL, FALSE);
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58
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59 if (dbus_g_proxy_call(self->priv->session_bus_proxy, "RequestName",
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60 &error, G_TYPE_STRING, self->priv->name, G_TYPE_UINT,
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61 DBUS_NAME_FLAG_DO_NOT_QUEUE, G_TYPE_INVALID, G_TYPE_UINT,
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62 &request_name_response, G_TYPE_INVALID) == 0) {
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63 g_warning("failed to acquire service name \"%s\": %s",
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64 self->priv->name, error->message);
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65 g_error_free(error);
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66 return (FALSE);
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67 }
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68
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69 switch (request_name_response) {
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70 case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
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71 return (TRUE);
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72 case DBUS_REQUEST_NAME_REPLY_EXISTS:
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73 break;
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74 default:
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75 g_warning("failed to acquire service name \"%s\"",
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76 self->priv->name);
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77 }
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78
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79 return (FALSE);
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80 }
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81
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82 static void
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83 xwrited_unique_get_property(GObject *gobject, guint property_id, GValue *value,
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84 GParamSpec *pspec)
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85 {
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86 XWritedUnique *app = XWRITED_UNIQUE(gobject);
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87
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88 switch (property_id) {
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89 case PROP_NAME:
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90 g_value_set_string(value, app->priv->name);
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91 break;
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92 case PROP_IS_XWRITED_UNIQUE:
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93 g_value_set_boolean(value, app->priv->is_unique);
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94 break;
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95 default:
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96 G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, property_id,
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97 pspec);
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98 }
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99 }
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100
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101 static void
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102 xwrited_unique_set_property(GObject *gobject, guint property_id,
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103 const GValue *value, GParamSpec *pspec)
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104 {
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105 XWritedUnique *app = XWRITED_UNIQUE(gobject);
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106
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107 switch (property_id) {
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108 case PROP_NAME:
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109 app->priv->name = g_strdup(g_value_get_string(value));
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110 break;
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111 default:
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112 G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, property_id,
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113 pspec);
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114 }
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115 }
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116
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117 static GObject *
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118 xwrited_unique_constructor(GType gtype, guint n_params,
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119 GObjectConstructParam *params)
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120 {
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121 GObjectClass *parent_class;
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122 GObject *gobject;
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123 XWritedUnique *app;
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124 GError *error = NULL;
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125
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126 parent_class = G_OBJECT_CLASS(xwrited_unique_parent_class);
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127 gobject = parent_class->constructor(gtype, n_params, params);
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128 app = XWRITED_UNIQUE(gobject);
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129
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130 app->priv->session_bus = dbus_g_bus_get(DBUS_BUS_SESSION, &error);
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131 if (app->priv->session_bus == NULL) {
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132 g_warning("failed to connect to DBus session bus: %s",
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133 error->message);
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134 g_error_free(error);
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135 goto out;
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136 }
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137
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138 app->priv->session_bus_proxy =
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139 dbus_g_proxy_new_for_name(app->priv->session_bus,
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140 DBUS_SERVICE_DBUS, DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS);
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141 if (app->priv->session_bus_proxy == NULL) {
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142 g_warning("failed to create DBus proxy");
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143 goto out;
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144 }
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145
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146 if (request_name(app)) {
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147 app->priv->is_unique = TRUE;
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148 }
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149
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150 out:
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151 return (gobject);
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152 }
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153
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154 static void
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155 xwrited_unique_dispose(GObject *gobject)
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156 {
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157 XWritedUnique *self = XWRITED_UNIQUE(gobject);
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158
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159 if (self->priv->session_bus_proxy != NULL) {
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160 g_object_unref(self->priv->session_bus_proxy);
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161 self->priv->session_bus_proxy = NULL;
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162 }
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163
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164 G_OBJECT_CLASS(xwrited_unique_parent_class)->dispose(gobject);
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165 }
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166
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167 static void
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168 xwrited_unique_finalize(GObject *gobject)
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169 {
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170 XWritedUnique *self = XWRITED_UNIQUE(gobject);
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171
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172 g_free(self->priv->name);
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173
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174 G_OBJECT_CLASS(xwrited_unique_parent_class)->finalize(gobject);
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175 }
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176
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177 static void
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178 xwrited_unique_class_init(XWritedUniqueClass *klass)
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179 {
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180 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
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181 GParamSpec *pspec;
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182
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183 gobject_class->constructor = xwrited_unique_constructor;
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184 gobject_class->get_property = xwrited_unique_get_property;
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185 gobject_class->set_property = xwrited_unique_set_property;
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186 gobject_class->dispose = xwrited_unique_dispose;
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187 gobject_class->finalize = xwrited_unique_finalize;
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188
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189 pspec = g_param_spec_string("name", "Name",
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190 "The unique name of the application", NULL, G_PARAM_READABLE |
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191 G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_NAME |
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192 G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB);
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193 g_object_class_install_property(gobject_class, PROP_NAME, pspec);
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194
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195 pspec = g_param_spec_boolean("is-unique", "Is unique",
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196 "Whether the current application instance is unique", FALSE,
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197 G_PARAM_READABLE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
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198 G_PARAM_STATIC_BLURB);
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199 g_object_class_install_property(gobject_class, PROP_IS_XWRITED_UNIQUE,
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200 pspec);
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201
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202 g_type_class_add_private(klass, sizeof (XWritedUniquePrivate));
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203 }
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204
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205 static void
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206 xwrited_unique_init(XWritedUnique *self)
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207 {
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208 self->priv = XWRITED_UNIQUE_GET_PRIVATE(self);
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209
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210 self->priv->is_unique = FALSE;
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211 self->priv->session_bus_proxy = NULL;
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212 }
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213
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214 XWritedUnique *
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215 xwrited_unique_new(const gchar *name)
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216 {
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217 XWritedUnique *app;
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218
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219 g_return_val_if_fail(name != NULL, NULL);
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220
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221 app = g_object_new(XWRITED_TYPE_UNIQUE, "name", name, NULL);
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222 if (app->priv->session_bus_proxy == NULL) {
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223 g_object_unref(app);
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224 return (NULL);
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225 }
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226
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227 return (app);
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228 }
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229
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230 gboolean
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231 xwrited_unique_is_unique(XWritedUnique *self)
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232 {
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233 g_return_val_if_fail(XWRITED_IS_UNIQUE(self), FALSE);
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234
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235 return (self->priv->is_unique);
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236 }