cdev_output_empty()
Check if a character device's output buffer is empty
Synopsis:
#include <qvm/cdev.h>static int cdev_output_empty(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 the specified character device's output buffer is empty and hence, has no characters to output. 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:
One (1) if the output buffer is empty, zero (0) if it's not, or a negative errno value.
Page updated: