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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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 */
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/** @addtogroup kbdgen
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/** @addtogroup kbdgen
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 * @brief   HelenOS generic uspace keyboard handler.
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 * @brief HelenOS generic uspace keyboard handler.
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 * @ingroup  kbd
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 * @ingroup kbd
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 * @{
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 * @{
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 */
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 */
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/** @file
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/** @file
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 */
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 */
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#include <key_buffer.h>
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#include <keybuffer.h>
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#include <futex.h>
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#include <futex.h>
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atomic_t keybuffer_futex = FUTEX_INITIALIZER;
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atomic_t keybuffer_futex = FUTEX_INITIALIZER;
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/** Clear key buffer.
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/** Clear key buffer.
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{
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{
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    keybuffer_free(keybuffer);
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    keybuffer_free(keybuffer);
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}
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}
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/** Get free space in buffer.
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/** Get free space in buffer.
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 *
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 * This function is useful for processing some scancodes that are translated
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 * This function is useful for processing some scancodes that are translated
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 * to more than one character.
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 * to more than one character.
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 *
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 * @return empty buffer space
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 * @return empty buffer space
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 *
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 */
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 */
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int keybuffer_available(keybuffer_t *keybuffer)
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size_t keybuffer_available(keybuffer_t *keybuffer)
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{
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{
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    return KEYBUFFER_SIZE - keybuffer->items;
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    return KEYBUFFER_SIZE - keybuffer->items;
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}
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}
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/**
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/**
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 *
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 * @return nonzero, if buffer is not empty.
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 * @return nonzero, if buffer is not empty.
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 *
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 */
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 */
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int keybuffer_empty(keybuffer_t *keybuffer)
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bool keybuffer_empty(keybuffer_t *keybuffer)
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{
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{
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    return (keybuffer->items == 0);
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    return (keybuffer->items == 0);
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}
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}
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/** Push key event to key buffer.
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/** Push key event to key buffer.
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 *
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 *
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 * If the buffer is full, the event is ignored.
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 * If the buffer is full, the event is ignored.
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 *
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 *
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 * @param keybuffer The keybuffer.
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 * @param keybuffer The keybuffer.
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 * @param ev        The event to push.
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 * @param ev        The event to push.
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 *
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 */
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 */
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void keybuffer_push(keybuffer_t *keybuffer, const kbd_event_t *ev)
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void keybuffer_push(keybuffer_t *keybuffer, const console_event_t *ev)
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{
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{
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    futex_down(&keybuffer_futex);
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    futex_down(&keybuffer_futex);
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    if (keybuffer->items < KEYBUFFER_SIZE) {
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    if (keybuffer->items < KEYBUFFER_SIZE) {
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        keybuffer->fifo[keybuffer->tail] = *ev;
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        keybuffer->fifo[keybuffer->tail] = *ev;
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        keybuffer->tail = (keybuffer->tail + 1) % KEYBUFFER_SIZE;
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        keybuffer->tail = (keybuffer->tail + 1) % KEYBUFFER_SIZE;
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        keybuffer->items++;
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        keybuffer->items++;
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    }
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    }
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    futex_up(&keybuffer_futex);
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    futex_up(&keybuffer_futex);
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}
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}
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/** Pop event from buffer.
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/** Pop event from buffer.
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 *
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 *
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 * @param edst  Pointer to where the event should be saved.
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 * @param edst Pointer to where the event should be saved.
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 *
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 * @return  Zero on empty buffer, nonzero otherwise.
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 * @return True if an event was popped.
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 *
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 */
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 */
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int keybuffer_pop(keybuffer_t *keybuffer, kbd_event_t *edst)
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bool keybuffer_pop(keybuffer_t *keybuffer, console_event_t *edst)
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{
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{
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    futex_down(&keybuffer_futex);
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    futex_down(&keybuffer_futex);
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    if (keybuffer->items > 0) {
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    if (keybuffer->items > 0) {
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        keybuffer->items--;
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        keybuffer->items--;
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        *edst = (keybuffer->fifo[keybuffer->head]) ;
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        *edst = (keybuffer->fifo[keybuffer->head]);
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        keybuffer->head = (keybuffer->head + 1) % KEYBUFFER_SIZE;
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        keybuffer->head = (keybuffer->head + 1) % KEYBUFFER_SIZE;
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        futex_up(&keybuffer_futex);
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        futex_up(&keybuffer_futex);
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        return 1;
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        return true;
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    }
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    }
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    futex_up(&keybuffer_futex);
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    futex_up(&keybuffer_futex);
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    return 0;
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    return false;
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}
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}
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/**
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/**
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 * @}
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 * @}
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 */
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 */