RTAI_SYSCALL_MODE unsigned long rt_bits_signal(BITS *bits, int setfun, unsigned long masks)
{
unsigned long flags, schedmap;
RT_TASK *task;
QUEUE *q;
CHECK_BITS_MAGIC(bits);
schedmap = 0;
q = &bits->queue;
flags = rt_global_save_flags_and_cli();
exec_fun[setfun](bits, masks);
masks = bits->mask;
while ((q = q->next) != &bits->queue) {
task = q->task;
if (test_fun[TEST_FUN(task)](bits, TEST_MASK(task))) {
dequeue_blocked(task);
rem_timed_task(task);
if (task->state != RT_SCHED_READY && (task->state &= ~(RT_SCHED_SEMAPHORE | RT_SCHED_DELAYED)) == RT_SCHED_READY) {
enq_ready_task(task);
#ifdef CONFIG_SMP
set_bit(task->runnable_on_cpus & 0x1F, &schedmap);
#endif
}
}
}
RT_SCHEDULE_MAP(schedmap);
rt_global_restore_flags(flags);
return masks;
}
RTAI_SYSCALL_MODE int _rt_bits_wait(BITS *bits, int testfun, unsigned long testmasks, int exitfun, unsigned long exitmasks, unsigned long *resulting_mask, int space)
{
RT_TASK *rt_current;
unsigned long flags, mask = 0;
int retval;
CHECK_BITS_MAGIC(bits);
flags = rt_global_save_flags_and_cli();
if (!test_fun[testfun](bits, testmasks))
{
void *retpnt;
long bits_test[2];
rt_current = RT_CURRENT;
TEST_BUF(rt_current, bits_test);
TEST_FUN(rt_current) = testfun;
TEST_MASK(rt_current) = testmasks;
rt_current->state |= RT_SCHED_SEMAPHORE;
rem_ready_current(rt_current);
enqueue_blocked(rt_current, &bits->queue, 1);
rt_schedule();
if (unlikely((retpnt = rt_current->blocked_on) != NULL))
{
if (likely(retpnt != RTP_OBJREM))
{
dequeue_blocked(rt_current);
retval = RTE_UNBLKD;
}
else
{
rt_current->prio_passed_to = NULL;
retval = RTE_OBJREM;
}
goto retmask;
}
}
retval = 0;
mask = bits->mask;
exec_fun[exitfun](bits, exitmasks);
retmask:
rt_global_restore_flags(flags);
if (resulting_mask)
{
if (space)
{
*resulting_mask = mask;
}
else
{
rt_copy_to_user(resulting_mask, &mask, sizeof(mask));
}
}
return retval;
}
int BoardIO::readFEN(Board &board, const string &buf)
{
board.reset();
for (int i = 0; i < 64; i++)
{
board.contents[i] = EmptyPiece;
}
char c;
string::const_iterator bp = buf.begin();
size_t first = buf.find_first_not_of(" \t");
if (first != string::npos) {
bp += first;
}
for (int line = 0; line < 8; line++)
{
int sqval = 56-line*8;
while ((c = *bp) != ' ' && c != '/')
{
Piece piece;
if (isdigit(c))
{
sqval += (*bp - '0');
bp++;
}
else if (isalnum(c))
{
if (!OnBoard(sqval))
{
return 0;
}
switch (c)
{
case 'p': piece = BlackPawn;
break;
case 'n': piece = BlackKnight;
break;
case 'b': piece = BlackBishop;
break;
case 'r': piece = BlackRook;
break;
case 'q': piece = BlackQueen;
break;
case 'k': piece = BlackKing;
break;
case 'P': piece = WhitePawn;
break;
case 'N': piece = WhiteKnight;
break;
case 'B': piece = WhiteBishop;
break;
case 'R': piece = WhiteRook;
break;
case 'Q': piece = WhiteQueen;
break;
case 'K': piece = WhiteKing;
break;
default:
return 0;
}
board.contents[sqval] = piece;
sqval++;
bp++;
}
else // not a letter or a digit
{
return 0;
}
}
if (c=='/') ++bp; // skip delimiter
}
while (bp != buf.end() && isspace(*bp)) bp++;
if (bp == buf.end()) return 0;
if (toupper(*bp) == 'W')
board.side = White;
else if (toupper(*bp) == 'B')
board.side = Black;
else
{
return 0;
}
bp++;
while (bp != buf.end() && isspace(*bp)) bp++;
if (bp == buf.end()) return 0;
c = *bp;
if (c == '-')
{
// TBD: should try to infer if castling has occurred?
board.state.castleStatus[White] =
board.state.castleStatus[Black] = CantCastleEitherSide;
bp++;
}
else
{
int k = 0;
for (; bp != buf.end() && !isspace(*bp); bp++)
{
if (*bp == 'K')
k += 1;
else if (*bp == 'Q')
k += 2;
else if (*bp == 'k')
k += 4;
else if (*bp == 'q')
k += 8;
else
{
return 0;
}
}
static const CastleType vals[4] =
{ CantCastleEitherSide, CanCastleKSide,
CanCastleQSide, CanCastleEitherSide};
board.state.castleStatus[White] = vals[k % 4];
board.state.castleStatus[Black] = vals[k / 4];
}
board.setSecondaryVars();
while (isspace(*bp)) bp++;
if (bp == buf.end()) return 0;
c = *bp;
if (c == '-')
{
board.state.enPassantSq = InvalidSquare;
}
else if (isalpha(c))
{
char sqbuf[2];
sqbuf[0] = *bp++;
if (bp == buf.end()) return 0;
sqbuf[1] = *bp++;
Square epsq = SquareValue(sqbuf);
if (epsq == InvalidSquare)
{
return 0;
}
board.state.enPassantSq = InvalidSquare;
Square ep_candidate =
SquareValue(sqbuf) - (8 * Direction[board.sideToMove()]);
// only actually set the e.p. square on the board if an en-passant capture
// is truly possible:
if (TEST_MASK(Attacks::ep_mask[File(ep_candidate)-1][(int)board.oppositeSide()],
board.pawn_bits[board.sideToMove()])) {
board.state.enPassantSq = ep_candidate;
// re-calc hash code since ep has changed
board.state.hashCode = BoardHash::hashCode(board);
}
}
else
{
return 0;
}
board.repList[board.state.moveCount++] = board.hashCode();
return 1;
}
