docs/reference/html/gi-GIVFuncInfo.html

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  18                   <a href="#gi-GIVFuncInfo.description" class="shortcut">Description</a></span>
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  25 <div class="refentry">
  26 <a name="gi-GIVFuncInfo"></a><div class="titlepage"></div>
  27 <div class="refnamediv"><table width="100%"><tr>
  28 <td valign="top">
  29 <h2><span class="refentrytitle"><a name="gi-GIVFuncInfo.top_of_page"></a>GIVFuncInfo</span></h2>
  30 <p>GIVFuncInfo — Struct representing a virtual function</p>
  31 </td>
  32 <td class="gallery_image" valign="top" align="right"></td>
  33 </tr></table></div>
  34 <div class="refsect1">
  35 <a name="gi-GIVFuncInfo.functions"></a><h2>Functions</h2>
  36 <div class="informaltable"><table class="informaltable" width="100%" border="0">
  37 <colgroup>
  38 <col width="150px" class="functions_return">
  39 <col class="functions_name">
  40 </colgroup>
  41 <tbody>
  42 <tr>
  43 <td class="function_type">
  44 <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfoFlags" title="enum GIVFuncInfoFlags"><span class="returnvalue">GIVFuncInfoFlags</span></a>
  45 </td>
  46 <td class="function_name">
  47 <a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-flags" title="g_vfunc_info_get_flags ()">g_vfunc_info_get_flags</a> <span class="c_punctuation">()</span>
  48 </td>
  49 </tr>
  50 <tr>
  51 <td class="function_type">
  52 <span class="returnvalue">gint</span>
  53 </td>
  54 <td class="function_name">
  55 <a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-offset" title="g_vfunc_info_get_offset ()">g_vfunc_info_get_offset</a> <span class="c_punctuation">()</span>
  56 </td>
  57 </tr>
  58 <tr>
  59 <td class="function_type">
  60 <a class="link" href="gi-GISignalInfo.html#GISignalInfo" title="GISignalInfo"><span class="returnvalue">GISignalInfo</span></a> *
  61 </td>
  62 <td class="function_name">
  63 <a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-signal" title="g_vfunc_info_get_signal ()">g_vfunc_info_get_signal</a> <span class="c_punctuation">()</span>
  64 </td>
  65 </tr>
  66 <tr>
  67 <td class="function_type">
  68 <a class="link" href="gi-GIFunctionInfo.html#GIFunctionInfo" title="GIFunctionInfo"><span class="returnvalue">GIFunctionInfo</span></a> *
  69 </td>
  70 <td class="function_name">
  71 <a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-invoker" title="g_vfunc_info_get_invoker ()">g_vfunc_info_get_invoker</a> <span class="c_punctuation">()</span>
  72 </td>
  73 </tr>
  74 <tr>
  75 <td class="function_type">
  76 <span class="returnvalue">gpointer</span>
  77 </td>
  78 <td class="function_name">
  79 <a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-get-address" title="g_vfunc_info_get_address ()">g_vfunc_info_get_address</a> <span class="c_punctuation">()</span>
  80 </td>
  81 </tr>
  82 <tr>
  83 <td class="function_type">
  84 <span class="returnvalue">gboolean</span>
  85 </td>
  86 <td class="function_name">
  87 <a class="link" href="gi-GIVFuncInfo.html#g-vfunc-info-invoke" title="g_vfunc_info_invoke ()">g_vfunc_info_invoke</a> <span class="c_punctuation">()</span>
  88 </td>
  89 </tr>
  90 </tbody>
  91 </table></div>
  92 </div>
  93 <div class="refsect1">
  94 <a name="gi-GIVFuncInfo.other"></a><h2>Types and Values</h2>
  95 <div class="informaltable"><table class="informaltable" width="100%" border="0">
  96 <colgroup>
  97 <col width="150px" class="name">
  98 <col class="description">
  99 </colgroup>
 100 <tbody>
 101 <tr>
 102 <td class="typedef_keyword">typedef</td>
 103 <td class="function_name"><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo">GIVFuncInfo</a></td>
 104 </tr>
 105 <tr>
 106 <td class="datatype_keyword">enum</td>
 107 <td class="function_name"><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfoFlags" title="enum GIVFuncInfoFlags">GIVFuncInfoFlags</a></td>
 108 </tr>
 109 </tbody>
 110 </table></div>
 111 </div>
 112 <div class="refsect1">
 113 <a name="gi-GIVFuncInfo.description"></a><h2>Description</h2>
 114 <p>GIVfuncInfo represents a virtual function. A property belongs to
 115 either a <a class="link" href="gi-GIObjectInfo.html#GIObjectInfo" title="GIObjectInfo"><span class="type">GIObjectInfo</span></a> or a <a class="link" href="gi-GIInterfaceInfo.html#GIInterfaceInfo" title="GIInterfaceInfo"><span class="type">GIInterfaceInfo</span></a>.</p>
 116 <div class="refsect1">
 117 <a name="gi-givfuncinfo.struct-hierarchy"></a><h2>Struct hierarchy</h2>
 118 <pre class="synopsis">
 119   <a class="link" href="gi-GIBaseInfo.html" title="GIBaseInfo">GIBaseInfo</a>
 120    +----<a class="link" href="gi-GICallableInfo.html" title="GICallableInfo">GICallableInfo</a>
 121          +----<a class="link" href="gi-GIFunctionInfo.html" title="GIFunctionInfo">GIFunctionInfo</a>
 122          +----<a class="link" href="gi-GISignalInfo.html" title="GISignalInfo">GISignalInfo</a>
 123          +----GIVFuncInfo
 124 </pre>
 125 </div>
 126 </div>
 127 <div class="refsect1">
 128 <a name="gi-GIVFuncInfo.functions_details"></a><h2>Functions</h2>
 129 <div class="refsect2">
 130 <a name="g-vfunc-info-get-flags"></a><h3>g_vfunc_info_get_flags ()</h3>
 131 <pre class="programlisting"><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfoFlags" title="enum GIVFuncInfoFlags"><span class="returnvalue">GIVFuncInfoFlags</span></a>
 132 g_vfunc_info_get_flags (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>);</pre>
 133 <p>Obtain the flags for this virtual function info. See <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfoFlags" title="enum GIVFuncInfoFlags"><span class="type">GIVFuncInfoFlags</span></a> for
 134 more information about possible flag values.</p>
 135 <div class="refsect3">
 136 <a name="g-vfunc-info-get-flags.parameters"></a><h4>Parameters</h4>
 137 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 138 <colgroup>
 139 <col width="150px" class="parameters_name">
 140 <col class="parameters_description">
 141 <col width="200px" class="parameters_annotations">
 142 </colgroup>
 143 <tbody><tr>
 144 <td class="parameter_name"><p>info</p></td>
 145 <td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
 146 <td class="parameter_annotations"> </td>
 147 </tr></tbody>
 148 </table></div>
 149 </div>
 150 <div class="refsect3">
 151 <a name="g-vfunc-info-get-flags.returns"></a><h4>Returns</h4>
 152 <p> the flags</p>
 153 </div>
 154 </div>
 155 <hr>
 156 <div class="refsect2">
 157 <a name="g-vfunc-info-get-offset"></a><h3>g_vfunc_info_get_offset ()</h3>
 158 <pre class="programlisting"><span class="returnvalue">gint</span>
 159 g_vfunc_info_get_offset (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>);</pre>
 160 <p>Obtain the offset of the function pointer in the class struct. The value
 161 0xFFFF indicates that the struct offset is unknown.</p>
 162 <div class="refsect3">
 163 <a name="g-vfunc-info-get-offset.parameters"></a><h4>Parameters</h4>
 164 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 165 <colgroup>
 166 <col width="150px" class="parameters_name">
 167 <col class="parameters_description">
 168 <col width="200px" class="parameters_annotations">
 169 </colgroup>
 170 <tbody><tr>
 171 <td class="parameter_name"><p>info</p></td>
 172 <td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
 173 <td class="parameter_annotations"> </td>
 174 </tr></tbody>
 175 </table></div>
 176 </div>
 177 <div class="refsect3">
 178 <a name="g-vfunc-info-get-offset.returns"></a><h4>Returns</h4>
 179 <p> the struct offset or 0xFFFF if it's unknown</p>
 180 </div>
 181 </div>
 182 <hr>
 183 <div class="refsect2">
 184 <a name="g-vfunc-info-get-signal"></a><h3>g_vfunc_info_get_signal ()</h3>
 185 <pre class="programlisting"><a class="link" href="gi-GISignalInfo.html#GISignalInfo" title="GISignalInfo"><span class="returnvalue">GISignalInfo</span></a> *
 186 g_vfunc_info_get_signal (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>);</pre>
 187 <p>Obtain the signal for the virtual function if one is set.
 188 The signal comes from the object or interface to which
 189 this virtual function belongs.</p>
 190 <div class="refsect3">
 191 <a name="g-vfunc-info-get-signal.parameters"></a><h4>Parameters</h4>
 192 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 193 <colgroup>
 194 <col width="150px" class="parameters_name">
 195 <col class="parameters_description">
 196 <col width="200px" class="parameters_annotations">
 197 </colgroup>
 198 <tbody><tr>
 199 <td class="parameter_name"><p>info</p></td>
 200 <td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
 201 <td class="parameter_annotations"> </td>
 202 </tr></tbody>
 203 </table></div>
 204 </div>
 205 <div class="refsect3">
 206 <a name="g-vfunc-info-get-signal.returns"></a><h4>Returns</h4>
 207 <p> the signal or <code class="literal">NULL</code> if none set. </p>
 208 <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
 209 </div>
 210 </div>
 211 <hr>
 212 <div class="refsect2">
 213 <a name="g-vfunc-info-get-invoker"></a><h3>g_vfunc_info_get_invoker ()</h3>
 214 <pre class="programlisting"><a class="link" href="gi-GIFunctionInfo.html#GIFunctionInfo" title="GIFunctionInfo"><span class="returnvalue">GIFunctionInfo</span></a> *
 215 g_vfunc_info_get_invoker (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>);</pre>
 216 <p>If this virtual function has an associated invoker method, this
 217 method will return it.  An invoker method is a C entry point.</p>
 218 <p>Not all virtuals will have invokers.</p>
 219 <div class="refsect3">
 220 <a name="g-vfunc-info-get-invoker.parameters"></a><h4>Parameters</h4>
 221 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 222 <colgroup>
 223 <col width="150px" class="parameters_name">
 224 <col class="parameters_description">
 225 <col width="200px" class="parameters_annotations">
 226 </colgroup>
 227 <tbody><tr>
 228 <td class="parameter_name"><p>info</p></td>
 229 <td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
 230 <td class="parameter_annotations"> </td>
 231 </tr></tbody>
 232 </table></div>
 233 </div>
 234 <div class="refsect3">
 235 <a name="g-vfunc-info-get-invoker.returns"></a><h4>Returns</h4>
 236 <p> the <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> or <code class="literal">NULL</code>. Free it with
 237 <a class="link" href="gi-GIBaseInfo.html#g-base-info-unref" title="g_base_info_unref ()"><code class="function">g_base_info_unref()</code></a> when done. </p>
 238 <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
 239 </div>
 240 </div>
 241 <hr>
 242 <div class="refsect2">
 243 <a name="g-vfunc-info-get-address"></a><h3>g_vfunc_info_get_address ()</h3>
 244 <pre class="programlisting"><span class="returnvalue">gpointer</span>
 245 g_vfunc_info_get_address (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>,
 246                           <em class="parameter"><code><span class="type">GType</span> implementor_gtype</code></em>,
 247                           <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
 248 <p>This method will look up where inside the type struct of <em class="parameter"><code>implementor_gtype</code></em>
 249
 250 is the implementation for <em class="parameter"><code>info</code></em>
 251 .</p>
 252 <div class="refsect3">
 253 <a name="g-vfunc-info-get-address.parameters"></a><h4>Parameters</h4>
 254 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 255 <colgroup>
 256 <col width="150px" class="parameters_name">
 257 <col class="parameters_description">
 258 <col width="200px" class="parameters_annotations">
 259 </colgroup>
 260 <tbody>
 261 <tr>
 262 <td class="parameter_name"><p>info</p></td>
 263 <td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a></p></td>
 264 <td class="parameter_annotations"> </td>
 265 </tr>
 266 <tr>
 267 <td class="parameter_name"><p>implementor_gtype</p></td>
 268 <td class="parameter_description"><p><span class="type">GType</span> implementing this virtual function</p></td>
 269 <td class="parameter_annotations"> </td>
 270 </tr>
 271 <tr>
 272 <td class="parameter_name"><p>error</p></td>
 273 <td class="parameter_description"><p>return location for a <span class="type">GError</span></p></td>
 274 <td class="parameter_annotations"> </td>
 275 </tr>
 276 </tbody>
 277 </table></div>
 278 </div>
 279 <div class="refsect3">
 280 <a name="g-vfunc-info-get-address.returns"></a><h4>Returns</h4>
 281 <p> address to a function or <code class="literal">NULL</code> if an error happened</p>
 282 </div>
 283 </div>
 284 <hr>
 285 <div class="refsect2">
 286 <a name="g-vfunc-info-invoke"></a><h3>g_vfunc_info_invoke ()</h3>
 287 <pre class="programlisting"><span class="returnvalue">gboolean</span>
 288 g_vfunc_info_invoke (<em class="parameter"><code><a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> *info</code></em>,
 289                      <em class="parameter"><code><span class="type">GType</span> implementor</code></em>,
 290                      <em class="parameter"><code>const <a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a> *in_args</code></em>,
 291                      <em class="parameter"><code><span class="type">int</span> n_in_args</code></em>,
 292                      <em class="parameter"><code>const <a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a> *out_args</code></em>,
 293                      <em class="parameter"><code><span class="type">int</span> n_out_args</code></em>,
 294                      <em class="parameter"><code><a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a> *return_value</code></em>,
 295                      <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
 296 <p>Invokes the function described in <em class="parameter"><code>info</code></em>
 297  with the given
 298 arguments. Note that inout parameters must appear in both
 299 argument lists.</p>
 300 <p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
 301 <div class="refsect3">
 302 <a name="g-vfunc-info-invoke.parameters"></a><h4>Parameters</h4>
 303 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 304 <colgroup>
 305 <col width="150px" class="parameters_name">
 306 <col class="parameters_description">
 307 <col width="200px" class="parameters_annotations">
 308 </colgroup>
 309 <tbody>
 310 <tr>
 311 <td class="parameter_name"><p>info</p></td>
 312 <td class="parameter_description"><p>a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> describing the virtual function to invoke</p></td>
 313 <td class="parameter_annotations"> </td>
 314 </tr>
 315 <tr>
 316 <td class="parameter_name"><p>implementor</p></td>
 317 <td class="parameter_description"><p><span class="type">GType</span> of the type that implements this virtual function</p></td>
 318 <td class="parameter_annotations"> </td>
 319 </tr>
 320 <tr>
 321 <td class="parameter_name"><p>in_args</p></td>
 322 <td class="parameter_description"><p>an array of <a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a>s, one for each in
 323 parameter of <em class="parameter"><code>info</code></em>
 324 . If there are no in parameter, <em class="parameter"><code>in_args</code></em>
 325 can be <code class="literal">NULL</code></p></td>
 326 <td class="parameter_annotations"> </td>
 327 </tr>
 328 <tr>
 329 <td class="parameter_name"><p>n_in_args</p></td>
 330 <td class="parameter_description"><p>the length of the <em class="parameter"><code>in_args</code></em>
 331 array</p></td>
 332 <td class="parameter_annotations"> </td>
 333 </tr>
 334 <tr>
 335 <td class="parameter_name"><p>out_args</p></td>
 336 <td class="parameter_description"><p>an array of <a class="link" href="gi-common-types.html#GIArgument" title="GIArgument"><span class="type">GIArgument</span></a>s, one for each out
 337 parameter of <em class="parameter"><code>info</code></em>
 338 . If there are no out parameters, <em class="parameter"><code>out_args</code></em>
 339 may be <code class="literal">NULL</code></p></td>
 340 <td class="parameter_annotations"> </td>
 341 </tr>
 342 <tr>
 343 <td class="parameter_name"><p>n_out_args</p></td>
 344 <td class="parameter_description"><p>the length of the <em class="parameter"><code>out_args</code></em>
 345 array</p></td>
 346 <td class="parameter_annotations"> </td>
 347 </tr>
 348 <tr>
 349 <td class="parameter_name"><p>return_value</p></td>
 350 <td class="parameter_description"><p>return location for the return value of the
 351 function. If the function returns void, <em class="parameter"><code>return_value</code></em>
 352 may be
 353 <code class="literal">NULL</code></p></td>
 354 <td class="parameter_annotations"> </td>
 355 </tr>
 356 <tr>
 357 <td class="parameter_name"><p>error</p></td>
 358 <td class="parameter_description"><p>return location for detailed error information, or <code class="literal">NULL</code></p></td>
 359 <td class="parameter_annotations"> </td>
 360 </tr>
 361 </tbody>
 362 </table></div>
 363 </div>
 364 <div class="refsect3">
 365 <a name="g-vfunc-info-invoke.returns"></a><h4>Returns</h4>
 366 <p> <code class="literal">TRUE</code> if the function has been invoked, <code class="literal">FALSE</code> if an
 367 error occurred.</p>
 368 </div>
 369 </div>
 370 </div>
 371 <div class="refsect1">
 372 <a name="gi-GIVFuncInfo.other_details"></a><h2>Types and Values</h2>
 373 <div class="refsect2">
 374 <a name="GIVFuncInfo"></a><h3>GIVFuncInfo</h3>
 375 <pre class="programlisting">typedef GIBaseInfo GIVFuncInfo;
 376 </pre>
 377 <p>Represents a virtual function.</p>
 378 </div>
 379 <hr>
 380 <div class="refsect2">
 381 <a name="GIVFuncInfoFlags"></a><h3>enum GIVFuncInfoFlags</h3>
 382 <p>Flags of a <a class="link" href="gi-GIVFuncInfo.html#GIVFuncInfo" title="GIVFuncInfo"><span class="type">GIVFuncInfo</span></a> struct.</p>
 383 <div class="refsect3">
 384 <a name="GIVFuncInfoFlags.members"></a><h4>Members</h4>
 385 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 386 <colgroup>
 387 <col width="300px" class="enum_members_name">
 388 <col class="enum_members_description">
 389 <col width="200px" class="enum_members_annotations">
 390 </colgroup>
 391 <tbody>
 392 <tr>
 393 <td class="enum_member_name"><p><a name="GI-VFUNC-MUST-CHAIN-UP:CAPS"></a>GI_VFUNC_MUST_CHAIN_UP</p></td>
 394 <td class="enum_member_description">
 395 <p>chains up to the parent type</p>
 396 </td>
 397 <td class="enum_member_annotations"> </td>
 398 </tr>
 399 <tr>
 400 <td class="enum_member_name"><p><a name="GI-VFUNC-MUST-OVERRIDE:CAPS"></a>GI_VFUNC_MUST_OVERRIDE</p></td>
 401 <td class="enum_member_description">
 402 <p>overrides</p>
 403 </td>
 404 <td class="enum_member_annotations"> </td>
 405 </tr>
 406 <tr>
 407 <td class="enum_member_name"><p><a name="GI-VFUNC-MUST-NOT-OVERRIDE:CAPS"></a>GI_VFUNC_MUST_NOT_OVERRIDE</p></td>
 408 <td class="enum_member_description">
 409 <p>does not override</p>
 410 </td>
 411 <td class="enum_member_annotations"> </td>
 412 </tr>
 413 <tr>
 414 <td class="enum_member_name"><p><a name="GI-VFUNC-THROWS:CAPS"></a>GI_VFUNC_THROWS</p></td>
 415 <td class="enum_member_description">
 416 <p>Includes a <span class="type">GError</span></p>
 417 </td>
 418 <td class="enum_member_annotations"> </td>
 419 </tr>
 420 </tbody>
 421 </table></div>
 422 </div>
 423 </div>
 424 </div>
 425 </div>
 426 <div class="footer">
 427 <hr>Generated by GTK-Doc V1.25.1</div>
 428 </body>
 429 </html>