The virtual table for a wfio_device_t. More...
#include <device.h>
Collaboration diagram for wfio_device_vtable_t:
Public Attributes | |
| void(* | close )(struct wfio_device_t *dev) |
| Close this device. | |
| size_t(* | read )(struct wfio_device_t *dev, void *buf, size_t sz, size_t elem) |
| Read from this device. | |
| size_t(* | write )(struct wfio_device_t *dev, const void *buf, size_t sz, size_t elem) |
| Write to this device. | |
| int(* | seek )(struct wfio_device_t *dev, wfio_off_t offset, wfio_whence_t whence) |
| Seek to a particular stream position in this device. | |
| wfio_off_t(* | tell )(struct wfio_device_t *dev) |
| Obtain the current stream position for this device. | |
| struct wfio_device_t *(* | dup )(struct wfio_device_t *dev) |
| Duplicate this device. | |
| int(* | flush )(struct wfio_device_t *dev) |
| Flush the underlying buffer. | |
| size_t(* | setbufsz )(struct wfio_device_t *dev, size_t len) |
Ensure that the buffer is exactly len bytes long. | |
| size_t(* | getbufsz )(struct wfio_device_t *dev) |
| Obtain the size of the buffer associated this device. | |
| int(* | dcntl )(struct wfio_device_t *dev, int cmd, va_list args) |
| Perform device-independent control on this device. | |
| int(* | ioctl )(struct wfio_device_t *dev, int cmd, va_list args) |
| Perform device-specific I/O control on the underlying device. | |
Detailed Description
The virtual table for a wfio_device_t.
This structure facilitates dynamic dispatch for a wfio_device_t. Each callback serves to service one the methods of the wfio_device_t and is assumed.
- Precondition
- Each entry in the vtable must point to a valid callback.
- Postcondition
- The corresponding callback will be invoked when a device's method is called.
The documentation for this struct was generated from the following file:
- include/wfio/device.h
