k-chow/k/events/pic/keyboard.c

#include "keyboard.h"
#include "io.h"
#include "utils/ring_buffer.h"

static struct ring_buffer keyboard_buffer;

void keyboard_handler(void)
{
    u8 scan_code = inb(KEYBOARD_IO);
    if (!(scan_code & 0x80))
        ring_buffer_push(&keyboard_buffer, &scan_code);
}

int getkey(void)
{
    u8 *key = ring_buffer_pop(&keyboard_buffer);
    if (!key)
        return -1;

    return *key;
}

void init_keyboard(void)
{
    ring_buffer_init(&keyboard_buffer, sizeof(u8));
}