| | 1 | <h2>device_close</h2> |
| | 2 | <hr> |
| | 3 | <p> |
| | 4 | <strong>Function</strong> - De-establish a connection to a device. |
| | 5 | <h3>SYNOPSIS</h3> |
| | 6 | <pre> |
| | 7 | <strong>#include< device/device.h></strong> |
| | 8 | |
| | 9 | <strong>kern_return_t device_close</strong> |
| | 10 | <strong>(mach_port_t</strong> <var>device</var><strong>);</strong> |
| | 11 | </pre> |
| | 12 | <h3>PARAMETERS</h3> |
| | 13 | <dl> |
| | 14 | <p> |
| | 15 | <dt> <var>device</var> |
| | 16 | <dd> |
| | 17 | [in device send right] |
| | 18 | A device port to the device to be closed. |
| | 19 | </dl> |
| | 20 | <h3>DESCRIPTION</h3> |
| | 21 | <p> |
| | 22 | The <strong>device_close</strong> function destroys the associated device |
| | 23 | port. The open count |
| | 24 | for the named device is decremented. If this count reaches zero, the close |
| | 25 | operation of the device driver is invoked, closing the device. |
| | 26 | <h3>NOTES</h3> |
| | 27 | <p> |
| | 28 | <strong>device_close</strong> will destroy any mapped device windows |
| | 29 | obtained through this |
| | 30 | device port. |
| | 31 | <h3>RETURN VALUES</h3> |
| | 32 | <dl> |
| | 33 | <p> |
| | 34 | <dt> <strong>D_NO_SUCH_DEVICE</strong> |
| | 35 | <dd> |
| | 36 | No device with that name, or the device is not operational. |
| | 37 | </dl> |
| | 38 | <h3>RELATED INFORMATION</h3> |
| | 39 | <p> |
| | 40 | Functions: |
| | 41 | <a href="device_open.html"><strong>device_open</strong></a>. |
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