/*
* Wait for a keycode to arrive.
* Uses the keyboard wait queue to sleep until
* a keycode arrives.
*/
Keycode Wait_For_Key(void) {
bool gotKey, iflag;
Keycode keycode = KEY_UNKNOWN;
// see if we still have input from the qemu command line to hand off
keycode = Get_Test_Input();
if (keycode != KEY_UNKNOWN) {
return keycode;
}
iflag = Begin_Int_Atomic();
do {
gotKey = !Is_Queue_Empty();
if (gotKey)
keycode = Dequeue_Keycode();
else
Wait(&s_waitQueue);
}
while (!gotKey);
End_Int_Atomic(iflag);
return keycode;
}
/*
* Poll for a key event.
* Returns true if a key is available,
* false if not. If a key event is available,
* it will be stored in the location pointed to
* by keycode.
*/
bool Read_Key(Keycode * keycode) {
bool result, iflag;
iflag = Begin_Int_Atomic();
result = !Is_Queue_Empty();
if (result) {
*keycode = Dequeue_Keycode();
}
End_Int_Atomic(iflag);
return result;
}
/*
* Wait for a keycode to arrive.
* Uses the keyboard wait queue to sleep until
* a keycode arrives.
*/
Keycode Wait_For_Key(void) {
bool gotKey, iflag;
Keycode keycode = KEY_UNKNOWN;
iflag = Begin_Int_Atomic();
do {
gotKey = !Is_Queue_Empty();
if (gotKey)
keycode = Dequeue_Keycode();
else
Wait(&s_waitQueue);
}
while (!gotKey);
End_Int_Atomic(iflag);
return keycode;
}