projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 13fec989 A |
1 | <h2>device_reply_server</h2> |
| 2 | <hr> | |
| 3 | <p> | |
| 4 | <strong>Function</strong> - Handle incoming data from kernel device driver. | |
| 5 | <h3>SYNOPSIS</h3> | |
| 6 | <pre> | |
| 7 | <strong>boolean_t device_reply_server</strong> | |
| 8 | <strong>(mach_msg_header_t</strong> <var>request_msg</var>, | |
| 9 | <strong>mach_msg_header_t</strong> <var>reply_msg</var><strong>);</strong> | |
| 10 | </pre> | |
| 11 | <h3>PARAMETERS</h3> | |
| 12 | <dl> | |
| 13 | <p> | |
| 14 | <dt> <var>request_msg</var> | |
| 15 | <dd> | |
| 16 | [pointer to in structure] | |
| 17 | The device driver message received from the | |
| 18 | kernel. | |
| 19 | <p> | |
| 20 | <dt> <var>reply_msg</var> | |
| 21 | <dd> | |
| 22 | [out structure] | |
| 23 | A reply message. No messages from a device driver | |
| 24 | expect a direct reply, so this field is not used. | |
| 25 | </dl> | |
| 26 | <h3>DESCRIPTION</h3> | |
| 27 | <p> | |
| 28 | The <strong>device_reply_server</strong> function is the MIG generated server handling | |
| 29 | function to handle messages from kernel device drivers. Such | |
| 30 | messages were sent in response to the various | |
| 31 | <strong>device_</strong>...<strong>_request</strong>... | |
| 32 | calls. It is assumed when using | |
| 33 | those calls that some task is listening for reply messages on the port named as a | |
| 34 | reply port to those calls. The <strong>device_reply_server</strong> | |
| 35 | function performs all | |
| 36 | necessary argument handling for a kernel message and calls one | |
| 37 | of the device server functions to interpret the message. | |
| 38 | <h3>RETURN VALUES</h3> | |
| 39 | <dl> | |
| 40 | <p> | |
| 41 | <dt> <strong>TRUE</strong> | |
| 42 | <dd> | |
| 43 | The message was handled and the appropriate function was called. | |
| 44 | <p> | |
| 45 | <dt> <strong>FALSE</strong> | |
| 46 | <dd> | |
| 47 | The message did not apply to this device handler interface and no other | |
| 48 | action was taken. | |
| 49 | </dl> | |
| 50 | <h3>RELATED INFORMATION</h3> | |
| 51 | <p> | |
| 52 | Functions: | |
| 53 | <a href="device_open.html"><strong>ds_device_open_reply<strong></a>, | |
| 54 | <a href="device_write.html"><strong>ds_device_write_reply<strong></a>, | |
| 55 | <a href="device_write_inband.html"><strong>ds_device_write_reply_inband<strong></a>, | |
| 56 | <a href="device_read.html"><strong>ds_device_read_reply<strong></a>, | |
| 57 | <a href="device_read_inband.html"><strong>ds_device_read_reply_inband<strong></a>, | |
| 58 | <a href="device_read_overwrite.html"><strong>ds_device_read_reply_overwrite<strong></a>. |