| Updated: October 28, 2024 |
Functions to create virtual character devices for guests
Use these functions to create virtual devices through which a guest can output to a host character device, and can receive input from another or the same host character device.
The input host character device must be a TTY device. There are no restrictions on the output host character device.
All functions that cdev.h provides are thread safe.
| Function | When used | Notes |
|---|---|---|
| cdev_control() | Startup, running (see notes) | Used in character-like vdev control function as a base handler. |
| cdev_input_available() | Running | |
| cdev_input_num_available() | Running | |
| cdev_input_receive() | Running | |
| cdev_output_busy() | Running | |
| cdev_output_empty() | Running | |
| cdev_output_full() | Running | |
| cdev_output_num_pending() | Running | |
| cdev_read() | Running | |
| cdev_setup() | Startup | |
| cdev_write() | Running | |
| cdev_write_buffer() | Running |