cdev_output_busy()

Check if a character device's output is busy

Synopsis:

#include <qvm/cdev.h>
static int cdev_output_busy(const struct cdev_state *const cds)

Arguments:

cds
A pointer to a structure with the character device state (see cdev_state).

Description:

This function checks if a character device's output is busy and hence, presently can't receive data. Calling this function makes sense only if you are using the internal buffers (i.e., you specified a non-zero buffer size when calling cdev_setup()).

Returns:

An integer indicating whether the device output is busy (1) or not busy (0).