/* kbd_input.h -- one byte of console input, from the serial line or a
 * keyboard (PS/2, USB boot keyboard, virtio keyboard). Both systems'
 * consoles read through it: v3's (kernel/src/repl.c) and the v4 boot's
 * (kernel/src/v4/sk_v4.c). docs/v4.0.0/STICK.md 5.4.
 */
#ifndef STARKERNEL_KBD_INPUT_H
#define STARKERNEL_KBD_INPUT_H

/* One raw byte from the serial line or a keyboard, non-blocking; -1 when
 * neither has one. While a USB keyboard runs, its xHCI event ring is serviced
 * once per timer tick here. Alt+TAB toggles the framebuffer's graphics/text
 * view and types nothing. */
int sk_input_getc(void);

/* Read and drop every byte and key that is waiting. */
void sk_input_drop(void);

#endif /* STARKERNEL_KBD_INPUT_H */