xnu-3789.1.32.tar.gz

[apple/xnu.git] / osfmk / man / device_close.html

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-<h2>device_close</h2>\r<hr>\r<p>\r<strong>Function</strong> - De-establish a connection to a device.\r<h3>SYNOPSIS</h3>\r<pre>\r<strong>#include&lt device/device.h&gt</strong>\r\r<strong>kern_return_t       device_close</strong>\r          <strong>(mach_port_t</strong>   <var>device</var><strong>);</strong>\r</pre>\r<h3>PARAMETERS</h3>\r<dl>\r<p>\r<dt> <var>device</var> \r<dd>\r[in device send right]\rA device port to the device to be closed.\r</dl>\r<h3>DESCRIPTION</h3>\r<p>\rThe <strong>device_close</strong> function destroys the associated device\rport.  The open count \rfor the named device is decremented.  If this count reaches zero, the close\roperation of the device driver is invoked, closing the device.\r<h3>NOTES</h3>\r<p>\r<strong>device_close</strong> will destroy any mapped device windows\robtained through this\rdevice port.\r<h3>RETURN VALUES</h3>\r<dl>\r<p>\r<dt> <strong>D_NO_SUCH_DEVICE</strong>\r<dd>\rNo device with that name, or the device is not operational.\r</dl>\r<h3>RELATED INFORMATION</h3>\r<p>\rFunctions:\r<a href="device_open.html"><strong>device_open</strong></a>.\r
\ No newline at end of file
+<h2>device_close</h2>
+<hr>
+<p>
+<strong>Function</strong> - De-establish a connection to a device.
+<h3>SYNOPSIS</h3>
+<pre>
+<strong>#include&lt device/device.h&gt</strong>
+
+<strong>kern_return_t  device_close</strong>
+               <strong>(mach_port_t</strong>   <var>device</var><strong>);</strong>
+</pre>
+<h3>PARAMETERS</h3>
+<dl>
+<p>
+<dt> <var>device</var> 
+<dd>
+[in device send right]
+A device port to the device to be closed.
+</dl>
+<h3>DESCRIPTION</h3>
+<p>
+The <strong>device_close</strong> function destroys the associated device
+port.  The open count 
+for the named device is decremented.  If this count reaches zero, the close
+operation of the device driver is invoked, closing the device.
+<h3>NOTES</h3>
+<p>
+<strong>device_close</strong> will destroy any mapped device windows
+obtained through this
+device port.
+<h3>RETURN VALUES</h3>
+<dl>
+<p>
+<dt> <strong>D_NO_SUCH_DEVICE</strong>
+<dd>
+No device with that name, or the device is not operational.
+</dl>
+<h3>RELATED INFORMATION</h3>
+<p>
+Functions:
+<a href="device_open.html"><strong>device_open</strong></a>.