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| <a name="GIOStream"></a><div class="titlepage"></div> |
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| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="GIOStream.top_of_page"></a>GIOStream</span></h2> |
| <p>GIOStream — Base class for implementing read/write streams</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="GIOStream.functions"></a><h2>Functions</h2> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="functions_return"> |
| <col class="functions_name"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="GInputStream.html" title="GInputStream"><span class="returnvalue">GInputStream</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-get-input-stream" title="g_io_stream_get_input_stream ()">g_io_stream_get_input_stream</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="returnvalue">GOutputStream</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-get-output-stream" title="g_io_stream_get_output_stream ()">g_io_stream_get_output_stream</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-splice-async" title="g_io_stream_splice_async ()">g_io_stream_splice_async</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-splice-finish" title="g_io_stream_splice_finish ()">g_io_stream_splice_finish</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-close" title="g_io_stream_close ()">g_io_stream_close</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-close-async" title="g_io_stream_close_async ()">g_io_stream_close_async</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-close-finish" title="g_io_stream_close_finish ()">g_io_stream_close_finish</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-is-closed" title="g_io_stream_is_closed ()">g_io_stream_is_closed</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-has-pending" title="g_io_stream_has_pending ()">g_io_stream_has_pending</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-set-pending" title="g_io_stream_set_pending ()">g_io_stream_set_pending</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GIOStream.html#g-io-stream-clear-pending" title="g_io_stream_clear_pending ()">g_io_stream_clear_pending</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.properties"></a><h2>Properties</h2> |
| <div class="informaltable"><table class="informaltable" border="0"> |
| <colgroup> |
| <col width="150px" class="properties_type"> |
| <col width="300px" class="properties_name"> |
| <col width="200px" class="properties_flags"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="property_type"><a href="../glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="GIOStream.html#GIOStream--closed" title="The “closed” property">closed</a></td> |
| <td class="property_flags">Read</td> |
| </tr> |
| <tr> |
| <td class="property_type"> |
| <a class="link" href="GInputStream.html" title="GInputStream"><span class="type">GInputStream</span></a> *</td> |
| <td class="property_name"><a class="link" href="GIOStream.html#GIOStream--input-stream" title="The “input-stream” property">input-stream</a></td> |
| <td class="property_flags">Read</td> |
| </tr> |
| <tr> |
| <td class="property_type"> |
| <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a> *</td> |
| <td class="property_name"><a class="link" href="GIOStream.html#GIOStream--output-stream" title="The “output-stream” property">output-stream</a></td> |
| <td class="property_flags">Read</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.other"></a><h2>Types and Values</h2> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="name"> |
| <col class="description"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="datatype_keyword">enum</td> |
| <td class="function_name"><a class="link" href="GIOStream.html#GIOStreamSpliceFlags" title="enum GIOStreamSpliceFlags">GIOStreamSpliceFlags</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword"> </td> |
| <td class="function_name"><a class="link" href="GIOStream.html#GIOStream-struct" title="GIOStream">GIOStream</a></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="screen"> <a href="../gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> |
| <span class="lineart">╰──</span> GIOStream |
| <span class="lineart">├──</span> <a class="link" href="GFileIOStream.html" title="GFileIOStream">GFileIOStream</a> |
| <span class="lineart">├──</span> <a class="link" href="GSimpleIOStream.html" title="GSimpleIOStream">GSimpleIOStream</a> |
| <span class="lineart">├──</span> <a class="link" href="GSocketConnection.html" title="GSocketConnection">GSocketConnection</a> |
| <span class="lineart">╰──</span> <a class="link" href="GTlsConnection.html" title="GTlsConnection">GTlsConnection</a> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.includes"></a><h2>Includes</h2> |
| <pre class="synopsis">#include <gio/gio.h> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.description"></a><h2>Description</h2> |
| <p>GIOStream represents an object that has both read and write streams. |
| Generally the two streams act as separate input and output streams, |
| but they share some common resources and state. For instance, for |
| seekable streams, both streams may use the same position.</p> |
| <p>Examples of <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> objects are <a class="link" href="GSocketConnection.html" title="GSocketConnection"><span class="type">GSocketConnection</span></a>, which represents |
| a two-way network connection; and <a class="link" href="GFileIOStream.html" title="GFileIOStream"><span class="type">GFileIOStream</span></a>, which represents a |
| file handle opened in read-write mode.</p> |
| <p>To do the actual reading and writing you need to get the substreams |
| with <a class="link" href="GIOStream.html#g-io-stream-get-input-stream" title="g_io_stream_get_input_stream ()"><code class="function">g_io_stream_get_input_stream()</code></a> and <a class="link" href="GIOStream.html#g-io-stream-get-output-stream" title="g_io_stream_get_output_stream ()"><code class="function">g_io_stream_get_output_stream()</code></a>.</p> |
| <p>The <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> object owns the input and the output streams, not the other |
| way around, so keeping the substreams alive will not keep the <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> |
| object alive. If the <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> object is freed it will be closed, thus |
| closing the substreams, so even if the substreams stay alive they will |
| always return <a class="link" href="gio-GIOError.html#G-IO-ERROR-CLOSED:CAPS"><code class="literal">G_IO_ERROR_CLOSED</code></a> for all operations.</p> |
| <p>To close a stream use <a class="link" href="GIOStream.html#g-io-stream-close" title="g_io_stream_close ()"><code class="function">g_io_stream_close()</code></a> which will close the common |
| stream object and also the individual substreams. You can also close |
| the substreams themselves. In most cases this only marks the |
| substream as closed, so further I/O on it fails but common state in the |
| <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> may still be open. However, some streams may support |
| "half-closed" states where one direction of the stream is actually shut down.</p> |
| <p>Operations on <a href="GIOStream.html#GIOStream-struct"><span class="type">GIOStreams</span></a> cannot be started while another operation on the |
| <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> or its substreams is in progress. Specifically, an application can |
| read from the <a class="link" href="GInputStream.html" title="GInputStream"><span class="type">GInputStream</span></a> and write to the <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a> simultaneously |
| (either in separate threads, or as asynchronous operations in the same |
| thread), but an application cannot start any <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> operation while there |
| is a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a>, <a class="link" href="GInputStream.html" title="GInputStream"><span class="type">GInputStream</span></a> or <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a> operation in progress, and |
| an application can’t start any <a class="link" href="GInputStream.html" title="GInputStream"><span class="type">GInputStream</span></a> or <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a> operation |
| while there is a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> operation in progress.</p> |
| <p>This is a product of individual stream operations being associated with a |
| given <a href="../glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a> (the thread-default context at the time the operation was |
| started), rather than entire streams being associated with a single |
| <a href="../glib-The-Main-Event-Loop.html#GMainContext"><span class="type">GMainContext</span></a>.</p> |
| <p>GIO may run operations on <a href="GIOStream.html#GIOStream-struct"><span class="type">GIOStreams</span></a> from other (worker) threads, and this |
| may be exposed to application code in the behaviour of wrapper streams, such |
| as <a class="link" href="GBufferedInputStream.html" title="GBufferedInputStream"><span class="type">GBufferedInputStream</span></a> or <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a>. With such wrapper APIs, |
| application code may only run operations on the base (wrapped) stream when |
| the wrapper stream is idle. Note that the semantics of such operations may |
| not be well-defined due to the state the wrapper stream leaves the base |
| stream in (though they are guaranteed not to crash).</p> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.functions_details"></a><h2>Functions</h2> |
| <div class="refsect2"> |
| <a name="g-io-stream-get-input-stream"></a><h3>g_io_stream_get_input_stream ()</h3> |
| <pre class="programlisting"><a class="link" href="GInputStream.html" title="GInputStream"><span class="returnvalue">GInputStream</span></a> * |
| g_io_stream_get_input_stream (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>);</pre> |
| <p>Gets the input stream for this object. This is used |
| for reading.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-get-input-stream.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-io-stream-get-input-stream.returns"></a><h4>Returns</h4> |
| <p> a <a class="link" href="GInputStream.html" title="GInputStream"><span class="type">GInputStream</span></a>, owned by the <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a>. |
| Do not free. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-get-output-stream"></a><h3>g_io_stream_get_output_stream ()</h3> |
| <pre class="programlisting"><a class="link" href="GOutputStream.html" title="GOutputStream"><span class="returnvalue">GOutputStream</span></a> * |
| g_io_stream_get_output_stream (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>);</pre> |
| <p>Gets the output stream for this object. This is used for |
| writing.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-get-output-stream.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-io-stream-get-output-stream.returns"></a><h4>Returns</h4> |
| <p> a <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a>, owned by the <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a>. |
| Do not free. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-splice-async"></a><h3>g_io_stream_splice_async ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| g_io_stream_splice_async (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream1</code></em>, |
| <em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream2</code></em>, |
| <em class="parameter"><code><a class="link" href="GIOStream.html#GIOStreamSpliceFlags" title="enum GIOStreamSpliceFlags"><span class="type">GIOStreamSpliceFlags</span></a> flags</code></em>, |
| <em class="parameter"><code><span class="type">int</span> io_priority</code></em>, |
| <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>, |
| <em class="parameter"><code><a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>, |
| <em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre> |
| <p>Asyncronously splice the output stream of <em class="parameter"><code>stream1</code></em> |
| to the input stream of |
| <em class="parameter"><code>stream2</code></em> |
| , and splice the output stream of <em class="parameter"><code>stream2</code></em> |
| to the input stream of |
| <em class="parameter"><code>stream1</code></em> |
| .</p> |
| <p>When the operation is finished <em class="parameter"><code>callback</code></em> |
| will be called. |
| You can then call <a class="link" href="GIOStream.html#g-io-stream-splice-finish" title="g_io_stream_splice_finish ()"><code class="function">g_io_stream_splice_finish()</code></a> to get the |
| result of the operation.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-splice-async.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>stream1</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>stream2</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flags</p></td> |
| <td class="parameter_description"><p>a set of <a class="link" href="GIOStream.html#GIOStreamSpliceFlags" title="enum GIOStreamSpliceFlags"><span class="type">GIOStreamSpliceFlags</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>io_priority</p></td> |
| <td class="parameter_description"><p>the io priority of the request.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>cancellable</p></td> |
| <td class="parameter_description"><p> optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to ignore. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>callback</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a>. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>user_data</p></td> |
| <td class="parameter_description"><p> user data passed to <em class="parameter"><code>callback</code></em> |
| . </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-splice-finish"></a><h3>g_io_stream_splice_finish ()</h3> |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| g_io_stream_splice_finish (<em class="parameter"><code><a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a> *result</code></em>, |
| <em class="parameter"><code><a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre> |
| <p>Finishes an asynchronous io stream splice operation.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-splice-finish.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>result</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>error</p></td> |
| <td class="parameter_description"><p>a <a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> location to store the error occurring, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to |
| ignore.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-io-stream-splice-finish.returns"></a><h4>Returns</h4> |
| <p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> on success, <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-close"></a><h3>g_io_stream_close ()</h3> |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| g_io_stream_close (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>, |
| <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>, |
| <em class="parameter"><code><a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre> |
| <p>Closes the stream, releasing resources related to it. This will also |
| close the individual input and output streams, if they are not already |
| closed.</p> |
| <p>Once the stream is closed, all other operations will return |
| <a class="link" href="gio-GIOError.html#G-IO-ERROR-CLOSED:CAPS"><code class="literal">G_IO_ERROR_CLOSED</code></a>. Closing a stream multiple times will not |
| return an error.</p> |
| <p>Closing a stream will automatically flush any outstanding buffers |
| in the stream.</p> |
| <p>Streams will be automatically closed when the last reference |
| is dropped, but you might want to call this function to make sure |
| resources are released as early as possible.</p> |
| <p>Some streams might keep the backing store of the stream (e.g. a file |
| descriptor) open after the stream is closed. See the documentation for |
| the individual stream for details.</p> |
| <p>On failure the first error that happened will be reported, but the |
| close operation will finish as much as possible. A stream that failed |
| to close will still return <a class="link" href="gio-GIOError.html#G-IO-ERROR-CLOSED:CAPS"><code class="literal">G_IO_ERROR_CLOSED</code></a> for all operations. |
| Still, it is important to check and report the error to the user, |
| otherwise there might be a loss of data as all data might not be written.</p> |
| <p>If <em class="parameter"><code>cancellable</code></em> |
| is not NULL, then the operation can be cancelled by |
| triggering the cancellable object from another thread. If the operation |
| was cancelled, the error <a class="link" href="gio-GIOError.html#G-IO-ERROR-CANCELLED:CAPS"><code class="literal">G_IO_ERROR_CANCELLED</code></a> will be returned. |
| Cancelling a close will still leave the stream closed, but some streams |
| can use a faster close that doesn't block to e.g. check errors.</p> |
| <p>The default implementation of this method just calls close on the |
| individual input/output streams.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-close.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>cancellable</p></td> |
| <td class="parameter_description"><p> optional <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> object, <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to ignore. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>error</p></td> |
| <td class="parameter_description"><p>location to store the error occurring, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to ignore</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-io-stream-close.returns"></a><h4>Returns</h4> |
| <p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> on success, <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> on failure</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-close-async"></a><h3>g_io_stream_close_async ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| g_io_stream_close_async (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>, |
| <em class="parameter"><code><span class="type">int</span> io_priority</code></em>, |
| <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>, |
| <em class="parameter"><code><a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>, |
| <em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre> |
| <p>Requests an asynchronous close of the stream, releasing resources |
| related to it. When the operation is finished <em class="parameter"><code>callback</code></em> |
| will be |
| called. You can then call <a class="link" href="GIOStream.html#g-io-stream-close-finish" title="g_io_stream_close_finish ()"><code class="function">g_io_stream_close_finish()</code></a> to get |
| the result of the operation.</p> |
| <p>For behaviour details see <a class="link" href="GIOStream.html#g-io-stream-close" title="g_io_stream_close ()"><code class="function">g_io_stream_close()</code></a>.</p> |
| <p>The asynchronous methods have a default fallback that uses threads |
| to implement asynchronicity, so they are optional for inheriting |
| classes. However, if you override one you must override all.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-close-async.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>io_priority</p></td> |
| <td class="parameter_description"><p>the io priority of the request</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>cancellable</p></td> |
| <td class="parameter_description"><p> optional cancellable object. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>callback</p></td> |
| <td class="parameter_description"><p> callback to call when the request is satisfied. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>user_data</p></td> |
| <td class="parameter_description"><p> the data to pass to callback function. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-close-finish"></a><h3>g_io_stream_close_finish ()</h3> |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| g_io_stream_close_finish (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>, |
| <em class="parameter"><code><a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a> *result</code></em>, |
| <em class="parameter"><code><a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre> |
| <p>Closes a stream.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-close-finish.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>result</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>error</p></td> |
| <td class="parameter_description"><p>a <a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> location to store the error occurring, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to |
| ignore</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-io-stream-close-finish.returns"></a><h4>Returns</h4> |
| <p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if stream was successfully closed, <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-is-closed"></a><h3>g_io_stream_is_closed ()</h3> |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| g_io_stream_is_closed (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>);</pre> |
| <p>Checks if a stream is closed.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-is-closed.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-io-stream-is-closed.returns"></a><h4>Returns</h4> |
| <p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the stream is closed.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-has-pending"></a><h3>g_io_stream_has_pending ()</h3> |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| g_io_stream_has_pending (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>);</pre> |
| <p>Checks if a stream has pending actions.</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-has-pending.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-io-stream-has-pending.returns"></a><h4>Returns</h4> |
| <p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>stream</code></em> |
| has pending actions.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-set-pending"></a><h3>g_io_stream_set_pending ()</h3> |
| <pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| g_io_stream_set_pending (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>, |
| <em class="parameter"><code><a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre> |
| <p>Sets <em class="parameter"><code>stream</code></em> |
| to have actions pending. If the pending flag is |
| already set or <em class="parameter"><code>stream</code></em> |
| is closed, it will return <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> and set |
| <em class="parameter"><code>error</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-set-pending.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>error</p></td> |
| <td class="parameter_description"><p>a <a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> location to store the error occurring, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to |
| ignore</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="g-io-stream-set-pending.returns"></a><h4>Returns</h4> |
| <p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if pending was previously unset and is now set.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="g-io-stream-clear-pending"></a><h3>g_io_stream_clear_pending ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| g_io_stream_clear_pending (<em class="parameter"><code><a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *stream</code></em>);</pre> |
| <p>Clears the pending flag on <em class="parameter"><code>stream</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="g-io-stream-clear-pending.parameters"></a><h4>Parameters</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>stream</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.other_details"></a><h2>Types and Values</h2> |
| <div class="refsect2"> |
| <a name="GIOStreamSpliceFlags"></a><h3>enum GIOStreamSpliceFlags</h3> |
| <p>GIOStreamSpliceFlags determine how streams should be spliced.</p> |
| <div class="refsect3"> |
| <a name="GIOStreamSpliceFlags.members"></a><h4>Members</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="300px" class="enum_members_name"> |
| <col class="enum_members_description"> |
| <col width="200px" class="enum_members_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="enum_member_name"><p><a name="G-IO-STREAM-SPLICE-NONE:CAPS"></a>G_IO_STREAM_SPLICE_NONE</p></td> |
| <td class="enum_member_description"> |
| <p>Do not close either stream.</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="enum_member_name"><p><a name="G-IO-STREAM-SPLICE-CLOSE-STREAM1:CAPS"></a>G_IO_STREAM_SPLICE_CLOSE_STREAM1</p></td> |
| <td class="enum_member_description"> |
| <p>Close the first stream after |
| the splice.</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="enum_member_name"><p><a name="G-IO-STREAM-SPLICE-CLOSE-STREAM2:CAPS"></a>G_IO_STREAM_SPLICE_CLOSE_STREAM2</p></td> |
| <td class="enum_member_description"> |
| <p>Close the second stream after |
| the splice.</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="enum_member_name"><p><a name="G-IO-STREAM-SPLICE-WAIT-FOR-BOTH:CAPS"></a>G_IO_STREAM_SPLICE_WAIT_FOR_BOTH</p></td> |
| <td class="enum_member_description"> |
| <p>Wait for both splice operations to finish |
| before calling the callback.</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GIOStream-struct"></a><h3>GIOStream</h3> |
| <pre class="programlisting">typedef struct _GIOStream GIOStream;</pre> |
| <p>Base class for read-write streams.</p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.property-details"></a><h2>Property Details</h2> |
| <div class="refsect2"> |
| <a name="GIOStream--closed"></a><h3>The <code class="literal">“closed”</code> property</h3> |
| <pre class="programlisting"> “closed” <a href="../glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Is the stream closed.</p> |
| <p>Flags: Read</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GIOStream--input-stream"></a><h3>The <code class="literal">“input-stream”</code> property</h3> |
| <pre class="programlisting"> “input-stream” <a class="link" href="GInputStream.html" title="GInputStream"><span class="type">GInputStream</span></a> *</pre> |
| <p>The GInputStream to read from.</p> |
| <p>Flags: Read</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GIOStream--output-stream"></a><h3>The <code class="literal">“output-stream”</code> property</h3> |
| <pre class="programlisting"> “output-stream” <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a> *</pre> |
| <p>The GOutputStream to write to.</p> |
| <p>Flags: Read</p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="GIOStream.see-also"></a><h2>See Also</h2> |
| <p><a class="link" href="GInputStream.html" title="GInputStream"><span class="type">GInputStream</span></a>, <a class="link" href="GOutputStream.html" title="GOutputStream"><span class="type">GOutputStream</span></a></p> |
| </div> |
| </div> |
| <div class="footer"> |
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