OpenTTD Source: src/signal.cpp Source File

OpenTTD Source 14.1

signal.cpp
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1 /*
2 * This file is part of OpenTTD.
3 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
4 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
5 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
6 */
7
10 #include "stdafx.h"
11 #include "debug.h"
12 #include "station_map.h"
13 #include "tunnelbridge_map.h"
14 #include "vehicle_func.h"
15 #include "viewport_func.h"
16 #include "train.h"
17 #include "company_base.h"
18
19 #include "safeguards.h"
20
21
23 static const uint SIG_TBU_SIZE = 64;
24 static const uint SIG_TBD_SIZE = 256;
25 static const uint SIG_GLOB_SIZE = 128;
26 static const uint SIG_GLOB_UPDATE = 64;
27
28 static_assert(SIG_GLOB_UPDATE <= SIG_GLOB_SIZE);
29
31 static const TrackBits _enterdir_to_trackbits[DIAGDIR_END] = {
32 TRACK_BIT_3WAY_NE,
33 TRACK_BIT_3WAY_SE,
34 TRACK_BIT_3WAY_SW,
35 TRACK_BIT_3WAY_NW
36 };
37
39 static const TrackdirBits _enterdir_to_trackdirbits[DIAGDIR_END] = {
40 TRACKDIR_BIT_X_SW | TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_RIGHT_S,
41 TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_RIGHT_N,
42 TRACKDIR_BIT_X_NE | TRACKDIR_BIT_LOWER_E | TRACKDIR_BIT_LEFT_N,
43 TRACKDIR_BIT_Y_SE | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_LEFT_S
44 };
45
51 template <typename Tdir, uint items>
52 struct SmallSet {
53 private:
54 uint n; // actual number of units
55 bool overflowed; // did we try to overflow the set?
56 const char *name; // name, used for debugging purposes...
57
59 struct SSdata {
60 TileIndex tile;
61 Tdir dir;
62 } data[items];
63
64 public:
66 SmallSet(const char *name) : n(0), overflowed(false), name(name) { }
67
69 void Reset()
70 {
71 this->n = 0;
72 this->overflowed = false;
73 }
74
79 bool Overflowed()
80 {
81 return this->overflowed;
82 }
83
88 bool IsEmpty()
89 {
90 return this->n == 0;
91 }
92
97 bool IsFull()
98 {
99 return this->n == lengthof(data);
100 }
101
106 uint Items()
107 {
108 return this->n;
109 }
110
111
118 bool Remove(TileIndex tile, Tdir dir)
119 {
120 for (uint i = 0; i < this->n; i++) {
121 if (this->data[i].tile == tile && this->data[i].dir == dir) {
122 this->data[i] = this->data[--this->n];
123 return true;
124 }
125 }
126
127 return false;
128 }
129
136 bool IsIn(TileIndex tile, Tdir dir)
137 {
138 for (uint i = 0; i < this->n; i++) {
139 if (this->data[i].tile == tile && this->data[i].dir == dir) return true;
140 }
141
142 return false;
143 }
144
152 bool Add(TileIndex tile, Tdir dir)
153 {
154 if (this->IsFull()) {
155 overflowed = true;
156 Debug(misc, 0, "SignalSegment too complex. Set {} is full (maximum {})", name, items);
157 return false; // set is full
158 }
159
160 this->data[this->n].tile = tile;
161 this->data[this->n].dir = dir;
162 this->n++;
163
164 return true;
165 }
166
173 bool Get(TileIndex *tile, Tdir *dir)
174 {
175 if (this->n == 0) return false;
176
177 this->n--;
178 *tile = this->data[this->n].tile;
179 *dir = this->data[this->n].dir;
180
181 return true;
182 }
183 };
184
185 static SmallSet<Trackdir, SIG_TBU_SIZE> _tbuset("_tbuset");
186 static SmallSet<DiagDirection, SIG_TBD_SIZE> _tbdset("_tbdset");
187 static SmallSet<DiagDirection, SIG_GLOB_SIZE> _globset("_globset");
188
189
191 static Vehicle *TrainOnTileEnum(Vehicle *v, void *)
192 {
193 if (v->type != VEH_TRAIN || Train::From(v)->track == TRACK_BIT_DEPOT) return nullptr;
194
195 return v;
196 }
197
198
212 static inline bool CheckAddToTodoSet(TileIndex t1, DiagDirection d1, TileIndex t2, DiagDirection d2)
213 {
214 _globset.Remove(t1, d1); // it can be in Global but not in Todo
215 _globset.Remove(t2, d2); // remove in all cases
216
217 assert(!_tbdset.IsIn(t1, d1)); // it really shouldn't be there already
218
219 return !_tbdset.Remove(t2, d2);
220 }
221
222
236 static inline bool MaybeAddToTodoSet(TileIndex t1, DiagDirection d1, TileIndex t2, DiagDirection d2)
237 {
238 if (!CheckAddToTodoSet(t1, d1, t2, d2)) return true;
239
240 return _tbdset.Add(t1, d1);
241 }
242
243
245 enum SigFlags {
246 SF_NONE = 0,
247 SF_TRAIN = 1 << 0,
248 SF_EXIT = 1 << 1,
249 SF_EXIT2 = 1 << 2,
250 SF_GREEN = 1 << 3,
251 SF_GREEN2 = 1 << 4,
252 SF_FULL = 1 << 5,
253 SF_PBS = 1 << 6,
254 };
255
256 DECLARE_ENUM_AS_BIT_SET(SigFlags)
257
258
259
265 static SigFlags ExploreSegment(Owner owner)
266 {
267 SigFlags flags = SF_NONE;
268
269 TileIndex tile = INVALID_TILE; // Stop GCC from complaining about a possibly uninitialized variable (issue #8280).
270 DiagDirection enterdir = INVALID_DIAGDIR;
271
272 while (_tbdset.Get(&tile, &enterdir)) { // tile and enterdir are initialized here, unless I'm mistaken.
273 TileIndex oldtile = tile; // tile we are leaving
274 DiagDirection exitdir = enterdir == INVALID_DIAGDIR ? INVALID_DIAGDIR : ReverseDiagDir(enterdir); // expected new exit direction (for straight line)
275
276 switch (GetTileType(tile)) {
277 case MP_RAILWAY: {
278 if (GetTileOwner(tile) != owner) continue; // do not propagate signals on others' tiles (remove for tracksharing)
279
280 if (IsRailDepot(tile)) {
281 if (enterdir == INVALID_DIAGDIR) { // from 'inside' - train just entered or left the depot
282 if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, nullptr, &TrainOnTileEnum)) flags |= SF_TRAIN;
283 exitdir = GetRailDepotDirection(tile);
284 tile += TileOffsByDiagDir(exitdir);
285 enterdir = ReverseDiagDir(exitdir);
286 break;
287 } else if (enterdir == GetRailDepotDirection(tile)) { // entered a depot
288 if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, nullptr, &TrainOnTileEnum)) flags |= SF_TRAIN;
289 continue;
290 } else {
291 continue;
292 }
293 }
294
295 assert(IsValidDiagDirection(enterdir));
296 TrackBits tracks = GetTrackBits(tile); // trackbits of tile
297 TrackBits tracks_masked = (TrackBits)(tracks & _enterdir_to_trackbits[enterdir]); // only incidating trackbits
298
299 if (tracks == TRACK_BIT_HORZ || tracks == TRACK_BIT_VERT) { // there is exactly one incidating track, no need to check
300 tracks = tracks_masked;
301 /* If no train detected yet, and there is not no train -> there is a train -> set the flag */
302 if (!(flags & SF_TRAIN) && EnsureNoTrainOnTrackBits(tile, tracks).Failed()) flags |= SF_TRAIN;
303 } else {
304 if (tracks_masked == TRACK_BIT_NONE) continue; // no incidating track
305 if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, nullptr, &TrainOnTileEnum)) flags |= SF_TRAIN;
306 }
307
308 if (HasSignals(tile)) { // there is exactly one track - not zero, because there is exit from this tile
309 Track track = TrackBitsToTrack(tracks_masked); // mask TRACK_BIT_X and Y too
310 if (HasSignalOnTrack(tile, track)) { // now check whole track, not trackdir
311 SignalType sig = GetSignalType(tile, track);
312 Trackdir trackdir = (Trackdir)FindFirstBit((tracks * 0x101U) & _enterdir_to_trackdirbits[enterdir]);
313 Trackdir reversedir = ReverseTrackdir(trackdir);
314 /* add (tile, reversetrackdir) to 'to-be-updated' set when there is
315 * ANY conventional signal in REVERSE direction
316 * (if it is a presignal EXIT and it changes, it will be added to 'to-be-done' set later) */
317 if (HasSignalOnTrackdir(tile, reversedir)) {
318 if (IsPbsSignal(sig)) {
319 flags |= SF_PBS;
320 } else if (!_tbuset.Add(tile, reversedir)) {
321 return flags | SF_FULL;
322 }
323 }
324 if (HasSignalOnTrackdir(tile, trackdir) && !IsOnewaySignal(tile, track)) flags |= SF_PBS;
325
326 /* if it is a presignal EXIT in OUR direction and we haven't found 2 green exits yes, do special check */
327 if (!(flags & SF_GREEN2) && IsPresignalExit(tile, track) && HasSignalOnTrackdir(tile, trackdir)) { // found presignal exit
328 if (flags & SF_EXIT) flags |= SF_EXIT2; // found two (or more) exits
329 flags |= SF_EXIT; // found at least one exit - allow for compiler optimizations
330 if (GetSignalStateByTrackdir(tile, trackdir) == SIGNAL_STATE_GREEN) { // found green presignal exit
331 if (flags & SF_GREEN) flags |= SF_GREEN2;
332 flags |= SF_GREEN;
333 }
334 }
335
336 continue;
337 }
338 }
339
340 for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) { // test all possible exit directions
341 if (dir != enterdir && (tracks & _enterdir_to_trackbits[dir])) { // any track incidating?
342 TileIndex newtile = tile + TileOffsByDiagDir(dir); // new tile to check
343 DiagDirection newdir = ReverseDiagDir(dir); // direction we are entering from
344 if (!MaybeAddToTodoSet(newtile, newdir, tile, dir)) return flags | SF_FULL;
345 }
346 }
347
348 continue; // continue the while() loop
349 }
350
351 case MP_STATION:
352 if (!HasStationRail(tile)) continue;
353 if (GetTileOwner(tile) != owner) continue;
354 if (DiagDirToAxis(enterdir) != GetRailStationAxis(tile)) continue; // different axis
355 if (IsStationTileBlocked(tile)) continue; // 'eye-candy' station tile
356
357 if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, nullptr, &TrainOnTileEnum)) flags |= SF_TRAIN;
358 tile += TileOffsByDiagDir(exitdir);
359 break;
360
361 case MP_ROAD:
362 if (!IsLevelCrossing(tile)) continue;
363 if (GetTileOwner(tile) != owner) continue;
364 if (DiagDirToAxis(enterdir) == GetCrossingRoadAxis(tile)) continue; // different axis
365
366 if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, nullptr, &TrainOnTileEnum)) flags |= SF_TRAIN;
367 tile += TileOffsByDiagDir(exitdir);
368 break;
369
370 case MP_TUNNELBRIDGE: {
371 if (GetTileOwner(tile) != owner) continue;
372 if (GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL) continue;
373 DiagDirection dir = GetTunnelBridgeDirection(tile);
374
375 if (enterdir == INVALID_DIAGDIR) { // incoming from the wormhole
376 if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, nullptr, &TrainOnTileEnum)) flags |= SF_TRAIN;
377 enterdir = dir;
378 exitdir = ReverseDiagDir(dir);
379 tile += TileOffsByDiagDir(exitdir); // just skip to next tile
380 } else { // NOT incoming from the wormhole!
381 if (ReverseDiagDir(enterdir) != dir) continue;
382 if (!(flags & SF_TRAIN) && HasVehicleOnPos(tile, nullptr, &TrainOnTileEnum)) flags |= SF_TRAIN;
383 tile = GetOtherTunnelBridgeEnd(tile); // just skip to exit tile
384 enterdir = INVALID_DIAGDIR;
385 exitdir = INVALID_DIAGDIR;
386 }
387 }
388 break;
389
390 default:
391 continue; // continue the while() loop
392 }
393
394 if (!MaybeAddToTodoSet(tile, enterdir, oldtile, exitdir)) return flags | SF_FULL;
395 }
396
397 return flags;
398 }
399
400
406 static void UpdateSignalsAroundSegment(SigFlags flags)
407 {
408 TileIndex tile = INVALID_TILE; // Stop GCC from complaining about a possibly uninitialized variable (issue #8280).
409 Trackdir trackdir = INVALID_TRACKDIR;
410
411 while (_tbuset.Get(&tile, &trackdir)) {
412 assert(HasSignalOnTrackdir(tile, trackdir));
413
414 SignalType sig = GetSignalType(tile, TrackdirToTrack(trackdir));
415 SignalState newstate = SIGNAL_STATE_GREEN;
416
417 /* determine whether the new state is red */
418 if (flags & SF_TRAIN) {
419 /* train in the segment */
420 newstate = SIGNAL_STATE_RED;
421 } else {
422 /* is it a bidir combo? - then do not count its other signal direction as exit */
423 if (sig == SIGTYPE_COMBO && HasSignalOnTrackdir(tile, ReverseTrackdir(trackdir))) {
424 /* at least one more exit */
425 if ((flags & SF_EXIT2) &&
426 /* no green exit */
427 (!(flags & SF_GREEN) ||
428 /* only one green exit, and it is this one - so all other exits are red */
429 (!(flags & SF_GREEN2) && GetSignalStateByTrackdir(tile, ReverseTrackdir(trackdir)) == SIGNAL_STATE_GREEN))) {
430 newstate = SIGNAL_STATE_RED;
431 }
432 } else { // entry, at least one exit, no green exit
433 if (IsPresignalEntry(tile, TrackdirToTrack(trackdir)) && (flags & SF_EXIT) && !(flags & SF_GREEN)) newstate = SIGNAL_STATE_RED;
434 }
435 }
436
437 /* only when the state changes */
438 if (newstate != GetSignalStateByTrackdir(tile, trackdir)) {
439 if (IsPresignalExit(tile, TrackdirToTrack(trackdir))) {
440 /* for pre-signal exits, add block to the global set */
441 DiagDirection exitdir = TrackdirToExitdir(ReverseTrackdir(trackdir));
442 _globset.Add(tile, exitdir); // do not check for full global set, first update all signals
443 }
444 SetSignalStateByTrackdir(tile, trackdir, newstate);
445 MarkTileDirtyByTile(tile);
446 }
447 }
448
449 }
450
451
453 static inline void ResetSets()
454 {
455 _tbuset.Reset();
456 _tbdset.Reset();
457 _globset.Reset();
458 }
459
460
468 static SigSegState UpdateSignalsInBuffer(Owner owner)
469 {
470 assert(Company::IsValidID(owner));
471
472 bool first = true; // first block?
473 SigSegState state = SIGSEG_FREE; // value to return
474
475 TileIndex tile = INVALID_TILE; // Stop GCC from complaining about a possibly uninitialized variable (issue #8280).
476 DiagDirection dir = INVALID_DIAGDIR;
477
478 while (_globset.Get(&tile, &dir)) {
479 assert(_tbuset.IsEmpty());
480 assert(_tbdset.IsEmpty());
481
482 /* After updating signal, data stored are always MP_RAILWAY with signals.
483 * Other situations happen when data are from outside functions -
484 * modification of railbits (including both rail building and removal),
485 * train entering/leaving block, train leaving depot...
486 */
487 switch (GetTileType(tile)) {
488 case MP_TUNNELBRIDGE:
489 /* 'optimization assert' - do not try to update signals when it is not needed */
490 assert(GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL);
491 assert(dir == INVALID_DIAGDIR || dir == ReverseDiagDir(GetTunnelBridgeDirection(tile)));
492 _tbdset.Add(tile, INVALID_DIAGDIR); // we can safely start from wormhole centre
493 _tbdset.Add(GetOtherTunnelBridgeEnd(tile), INVALID_DIAGDIR);
494 break;
495
496 case MP_RAILWAY:
497 if (IsRailDepot(tile)) {
498 /* 'optimization assert' do not try to update signals in other cases */
499 assert(dir == INVALID_DIAGDIR || dir == GetRailDepotDirection(tile));
500 _tbdset.Add(tile, INVALID_DIAGDIR); // start from depot inside
501 break;
502 }
503 [[fallthrough]];
504
505 case MP_STATION:
506 case MP_ROAD:
507 if ((TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0)) & _enterdir_to_trackbits[dir]) != TRACK_BIT_NONE) {
508 /* only add to set when there is some 'interesting' track */
509 _tbdset.Add(tile, dir);
510 _tbdset.Add(tile + TileOffsByDiagDir(dir), ReverseDiagDir(dir));
511 break;
512 }
513 [[fallthrough]];
514
515 default:
516 /* jump to next tile */
517 tile = tile + TileOffsByDiagDir(dir);
518 dir = ReverseDiagDir(dir);
519 if ((TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0)) & _enterdir_to_trackbits[dir]) != TRACK_BIT_NONE) {
520 _tbdset.Add(tile, dir);
521 break;
522 }
523 /* happens when removing a rail that wasn't connected at one or both sides */
524 continue; // continue the while() loop
525 }
526
527 assert(!_tbdset.Overflowed()); // it really shouldn't overflow by these one or two items
528 assert(!_tbdset.IsEmpty()); // it wouldn't hurt anyone, but shouldn't happen too
529
530 SigFlags flags = ExploreSegment(owner);
531
532 if (first) {
533 first = false;
534 /* SIGSEG_FREE is set by default */
535 if (flags & SF_PBS) {
536 state = SIGSEG_PBS;
537 } else if ((flags & SF_TRAIN) || ((flags & SF_EXIT) && !(flags & SF_GREEN)) || (flags & SF_FULL)) {
538 state = SIGSEG_FULL;
539 }
540 }
541
542 /* do not do anything when some buffer was full */
543 if (flags & SF_FULL) {
544 ResetSets(); // free all sets
545 break;
546 }
547
548 UpdateSignalsAroundSegment(flags);
549 }
550
551 return state;
552 }
553
554
555 static Owner _last_owner = INVALID_OWNER;
556
557
562 void UpdateSignalsInBuffer()
563 {
564 if (!_globset.IsEmpty()) {
565 UpdateSignalsInBuffer(_last_owner);
566 _last_owner = INVALID_OWNER; // invalidate
567 }
568 }
569
570
578 void AddTrackToSignalBuffer(TileIndex tile, Track track, Owner owner)
579 {
580 static const DiagDirection _search_dir_1[] = {
581 DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_SW, DIAGDIR_SE
582 };
583 static const DiagDirection _search_dir_2[] = {
584 DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE
585 };
586
587 /* do not allow signal updates for two companies in one run */
588 assert(_globset.IsEmpty() || owner == _last_owner);
589
590 _last_owner = owner;
591
592 _globset.Add(tile, _search_dir_1[track]);
593 _globset.Add(tile, _search_dir_2[track]);
594
595 if (_globset.Items() >= SIG_GLOB_UPDATE) {
596 /* too many items, force update */
597 UpdateSignalsInBuffer(_last_owner);
598 _last_owner = INVALID_OWNER;
599 }
600 }
601
602
610 void AddSideToSignalBuffer(TileIndex tile, DiagDirection side, Owner owner)
611 {
612 /* do not allow signal updates for two companies in one run */
613 assert(_globset.IsEmpty() || owner == _last_owner);
614
615 _last_owner = owner;
616
617 _globset.Add(tile, side);
618
619 if (_globset.Items() >= SIG_GLOB_UPDATE) {
620 /* too many items, force update */
621 UpdateSignalsInBuffer(_last_owner);
622 _last_owner = INVALID_OWNER;
623 }
624 }
625
636 SigSegState UpdateSignalsOnSegment(TileIndex tile, DiagDirection side, Owner owner)
637 {
638 assert(_globset.IsEmpty());
639 _globset.Add(tile, side);
640
641 return UpdateSignalsInBuffer(owner);
642 }
643
644
654 void SetSignalsOnBothDir(TileIndex tile, Track track, Owner owner)
655 {
656 assert(_globset.IsEmpty());
657
658 AddTrackToSignalBuffer(tile, track, owner);
659 UpdateSignalsInBuffer(owner);
660 }
DIAGDIR_SE
@ DIAGDIR_SE
Southeast.
Definition: direction_type.h:76
UpdateSignalsAroundSegment
static void UpdateSignalsAroundSegment(SigFlags flags)
Update signals around segment in _tbuset.
Definition: signal.cpp:406
TRACK_BIT_NONE
@ TRACK_BIT_NONE
No track.
Definition: track_type.h:36
TRACK_BIT_3WAY_SW
@ TRACK_BIT_3WAY_SW
"Arrow" to the south-west
Definition: track_type.h:48
train.h
UpdateSignalsInBuffer
static SigSegState UpdateSignalsInBuffer(Owner owner)
Updates blocks in _globset buffer.
Definition: signal.cpp:468
SIG_GLOB_UPDATE
static const uint SIG_GLOB_UPDATE
how many items need to be in _globset to force update
Definition: signal.cpp:26
HasVehicleOnPos
bool HasVehicleOnPos(TileIndex tile, void *data, VehicleFromPosProc *proc)
Checks whether a vehicle is on a specific location.
Definition: vehicle.cpp:520
SF_EXIT
@ SF_EXIT
exitsignal found
Definition: signal.cpp:248
company_base.h
tunnelbridge_map.h
IsOnewaySignal
bool IsOnewaySignal(Tile t, Track track)
One-way signals can't be passed the 'wrong' way.
Definition: rail_map.h:319
TrackdirToTrack
Track TrackdirToTrack(Trackdir trackdir)
Returns the Track that a given Trackdir represents.
Definition: track_func.h:262
TrackdirToExitdir
DiagDirection TrackdirToExitdir(Trackdir trackdir)
Maps a trackdir to the (4-way) direction the tile is exited when following that trackdir.
Definition: track_func.h:439
ResetSets
static void ResetSets()
Reset all sets after one set overflowed.
Definition: signal.cpp:453
DIAGDIR_END
@ DIAGDIR_END
Used for iterations.
Definition: direction_type.h:79
DiagDirToAxis
Axis DiagDirToAxis(DiagDirection d)
Convert a DiagDirection to the axis.
Definition: direction_func.h:214
INVALID_TILE
constexpr TileIndex INVALID_TILE
The very nice invalid tile marker.
Definition: tile_type.h:95
SIGNAL_STATE_GREEN
@ SIGNAL_STATE_GREEN
The signal is green.
Definition: signal_type.h:44
MP_RAILWAY
@ MP_RAILWAY
A railway.
Definition: tile_type.h:49
TRACKDIR_BIT_LEFT_N
@ TRACKDIR_BIT_LEFT_N
Track left, direction north.
Definition: track_type.h:111
SignalState
SignalState
These are states in which a signal can be.
Definition: signal_type.h:42
_enterdir_to_trackbits
static const TrackBits _enterdir_to_trackbits[DIAGDIR_END]
incidating trackbits with given enterdir
Definition: signal.cpp:31
UpdateSignalsOnSegment
SigSegState UpdateSignalsOnSegment(TileIndex tile, DiagDirection side, Owner owner)
Update signals, starting at one side of a tile Will check tile next to this at opposite side too.
Definition: signal.cpp:636
IsLevelCrossing
bool IsLevelCrossing(Tile t)
Return whether a tile is a level crossing.
Definition: road_map.h:85
StrongType::Typedef< uint32_t, struct TileIndexTag, StrongType::Compare, StrongType::Integer, StrongType::Compatible< int32_t >, StrongType::Compatible< int64_t > >
DIAGDIR_NW
@ DIAGDIR_NW
Northwest.
Definition: direction_type.h:78
TRACKDIR_BIT_Y_NW
@ TRACKDIR_BIT_Y_NW
Track y-axis, direction north-west.
Definition: track_type.h:108
Vehicle
Vehicle data structure.
Definition: vehicle_base.h:240
Owner
Owner
Enum for all companies/owners.
Definition: company_type.h:18
MaybeAddToTodoSet
static bool MaybeAddToTodoSet(TileIndex t1, DiagDirection d1, TileIndex t2, DiagDirection d2)
Perform some operations before adding data into Todo set The new and reverse direction is removed fro...
Definition: signal.cpp:236
MP_ROAD
@ MP_ROAD
A tile with road (or tram tracks)
Definition: tile_type.h:50
TrainOnTileEnum
static Vehicle * TrainOnTileEnum(Vehicle *v, void *)
Check whether there is a train on rail, not in a depot.
Definition: signal.cpp:191
SmallSet::SmallSet
SmallSet(const char *name)
Constructor - just set default values and 'name'.
Definition: signal.cpp:66
SIG_TBU_SIZE
static const uint SIG_TBU_SIZE
these are the maximums used for updating signal blocks
Definition: signal.cpp:23
GetRailStationAxis
Axis GetRailStationAxis(Tile t)
Get the rail direction of a rail station.
Definition: station_map.h:410
SmallSet::Add
bool Add(TileIndex tile, Tdir dir)
Adds tile & dir into the set, checks for full set Sets the 'overflowed' flag if the set was full.
Definition: signal.cpp:152
Debug
#define Debug(category, level, format_string,...)
Ouptut a line of debugging information.
Definition: debug.h:37
SignalType
SignalType
Type of signal, i.e.
Definition: signal_type.h:23
GetTileTrackStatus
TrackStatus GetTileTrackStatus(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
Returns information about trackdirs and signal states.
Definition: landscape.cpp:556
GetTileType
static debug_inline TileType GetTileType(Tile tile)
Get the tiletype of a given tile.
Definition: tile_map.h:96
SetSignalsOnBothDir
void SetSignalsOnBothDir(TileIndex tile, Track track, Owner owner)
Update signals at segments that are at both ends of given (existent or non-existent) track.
Definition: signal.cpp:654
GetRailDepotDirection
DiagDirection GetRailDepotDirection(Tile t)
Returns the direction the depot is facing to.
Definition: rail_map.h:171
SmallSet::Items
uint Items()
Reads the number of items.
Definition: signal.cpp:106
TRACK_BIT_VERT
@ TRACK_BIT_VERT
Left and right track.
Definition: track_type.h:45
DIAGDIR_SW
@ DIAGDIR_SW
Southwest.
Definition: direction_type.h:77
IsRailDepot
static debug_inline bool IsRailDepot(Tile t)
Is this rail tile a rail depot?
Definition: rail_map.h:95
TRANSPORT_RAIL
@ TRANSPORT_RAIL
Transport by train.
Definition: transport_type.h:27
SF_EXIT2
@ SF_EXIT2
two or more exits found
Definition: signal.cpp:249
SIG_TBD_SIZE
static const uint SIG_TBD_SIZE
number of intersections - open nodes in current block
Definition: signal.cpp:24
TrackBitsToTrack
Track TrackBitsToTrack(TrackBits tracks)
Converts TrackBits to Track.
Definition: track_func.h:193
SIGNAL_STATE_RED
@ SIGNAL_STATE_RED
The signal is red.
Definition: signal_type.h:43
INVALID_OWNER
@ INVALID_OWNER
An invalid owner.
Definition: company_type.h:29
ReverseDiagDir
DiagDirection ReverseDiagDir(DiagDirection d)
Returns the reverse direction of the given DiagDirection.
Definition: direction_func.h:118
HasSignalOnTrack
bool HasSignalOnTrack(Tile tile, Track track)
Checks for the presence of signals (either way) on the given track on the given rail tile.
Definition: rail_map.h:413
CommandCost::Failed
bool Failed() const
Did this command fail?
Definition: command_type.h:171
TRACKDIR_BIT_LOWER_W
@ TRACKDIR_BIT_LOWER_W
Track lower, direction west.
Definition: track_type.h:110
SIG_GLOB_SIZE
static const uint SIG_GLOB_SIZE
number of open blocks (block can be opened more times until detected)
Definition: signal.cpp:25
ReverseTrackdir
Trackdir ReverseTrackdir(Trackdir trackdir)
Maps a trackdir to the reverse trackdir.
Definition: track_func.h:247
_enterdir_to_trackdirbits
static const TrackdirBits _enterdir_to_trackdirbits[DIAGDIR_END]
incidating trackdirbits with given enterdir
Definition: signal.cpp:39
TRACKDIR_BIT_UPPER_E
@ TRACKDIR_BIT_UPPER_E
Track upper, direction east.
Definition: track_type.h:102
TRACKDIR_BIT_LEFT_S
@ TRACKDIR_BIT_LEFT_S
Track left, direction south.
Definition: track_type.h:104
safeguards.h
SIGSEG_PBS
@ SIGSEG_PBS
Segment is a PBS segment.
Definition: signal_func.h:52
lengthof
#define lengthof(array)
Return the length of an fixed size array.
Definition: stdafx.h:303
TRACKDIR_BIT_RIGHT_S
@ TRACKDIR_BIT_RIGHT_S
Track right, direction south.
Definition: track_type.h:105
GetSignalStateByTrackdir
SignalState GetSignalStateByTrackdir(Tile tile, Trackdir trackdir)
Gets the state of the signal along the given trackdir.
Definition: rail_map.h:438
GetTileOwner
Owner GetTileOwner(Tile tile)
Returns the owner of a tile.
Definition: tile_map.h:178
INVALID_DIAGDIR
@ INVALID_DIAGDIR
Flag for an invalid DiagDirection.
Definition: direction_type.h:80
SmallSet::Get
bool Get(TileIndex *tile, Tdir *dir)
Reads the last added element into the set.
Definition: signal.cpp:173
MP_TUNNELBRIDGE
@ MP_TUNNELBRIDGE
Tunnel entry/exit and bridge heads.
Definition: tile_type.h:57
SigFlags
SigFlags
Current signal block state flags.
Definition: signal.cpp:245
_tbuset
static SmallSet< Trackdir, SIG_TBU_SIZE > _tbuset("_tbuset")
set of signals that will be updated
INVALID_TRACKDIR
@ INVALID_TRACKDIR
Flag for an invalid trackdir.
Definition: track_type.h:86
DiagDirection
DiagDirection
Enumeration for diagonal directions.
Definition: direction_type.h:73
SigSegState
SigSegState
State of the signal segment.
Definition: signal_func.h:49
SIGTYPE_COMBO
@ SIGTYPE_COMBO
presignal inter-block
Definition: signal_type.h:27
TrackStatusToTrackBits
TrackBits TrackStatusToTrackBits(TrackStatus ts)
Returns the present-track-information of a TrackStatus.
Definition: track_func.h:363
SmallSet::SSdata
Element of set.
Definition: signal.cpp:59
SmallSet::IsIn
bool IsIn(TileIndex tile, Tdir dir)
Tries to find given tile and dir in the set.
Definition: signal.cpp:136
stdafx.h
viewport_func.h
GetTrackBits
TrackBits GetTrackBits(Tile tile)
Gets the track bits of the given tile.
Definition: rail_map.h:136
TileOffsByDiagDir
TileIndexDiff TileOffsByDiagDir(DiagDirection dir)
Convert a DiagDirection to a TileIndexDiff.
Definition: map_func.h:563
TRACK_BIT_DEPOT
@ TRACK_BIT_DEPOT
Bitflag for a depot.
Definition: track_type.h:53
SF_PBS
@ SF_PBS
pbs signal found
Definition: signal.cpp:253
ExploreSegment
static SigFlags ExploreSegment(Owner owner)
Search signal block.
Definition: signal.cpp:265
TRACKDIR_BIT_X_NE
@ TRACKDIR_BIT_X_NE
Track x-axis, direction north-east.
Definition: track_type.h:100
SmallSet::IsEmpty
bool IsEmpty()
Checks for empty set.
Definition: signal.cpp:88
SF_FULL
@ SF_FULL
some of buffers was full, do not continue
Definition: signal.cpp:252
TRACK_BIT_HORZ
@ TRACK_BIT_HORZ
Upper and lower track.
Definition: track_type.h:44
IsValidDiagDirection
bool IsValidDiagDirection(DiagDirection d)
Checks if an integer value is a valid DiagDirection.
Definition: direction_func.h:21
vehicle_func.h
EnsureNoTrainOnTrackBits
CommandCost EnsureNoTrainOnTrackBits(TileIndex tile, TrackBits track_bits)
Tests if a vehicle interacts with the specified track bits.
Definition: vehicle.cpp:608
GetCrossingRoadAxis
Axis GetCrossingRoadAxis(Tile t)
Get the road axis of a level crossing.
Definition: road_map.h:325
TRACK_BIT_3WAY_NE
@ TRACK_BIT_3WAY_NE
"Arrow" to the north-east
Definition: track_type.h:46
SpecializedVehicle< Train, Type >::From
static Train * From(Vehicle *v)
Converts a Vehicle to SpecializedVehicle with type checking.
Definition: vehicle_base.h:1211
TRACKDIR_BIT_LOWER_E
@ TRACKDIR_BIT_LOWER_E
Track lower, direction east.
Definition: track_type.h:103
_last_owner
static Owner _last_owner
last owner whose track was put into _globset
Definition: signal.cpp:555
HasStationRail
bool HasStationRail(Tile t)
Has this station tile a rail? In other words, is this station tile a rail station or rail waypoint?
Definition: station_map.h:135
SmallSet::IsFull
bool IsFull()
Checks for full set.
Definition: signal.cpp:97
SF_GREEN2
@ SF_GREEN2
two or more green exits found
Definition: signal.cpp:251
HasSignals
bool HasSignals(Tile t)
Checks if a rail tile has signals.
Definition: rail_map.h:72
MarkTileDirtyByTile
void MarkTileDirtyByTile(TileIndex tile, int bridge_level_offset, int tile_height_override)
Mark a tile given by its index dirty for repaint.
Definition: viewport.cpp:2051
AddSideToSignalBuffer
void AddSideToSignalBuffer(TileIndex tile, DiagDirection side, Owner owner)
Add side of tile to signal update buffer.
Definition: signal.cpp:610
SmallSet
Set containing 'items' items of 'tile and Tdir' No tree structure is used because it would cause slow...
Definition: signal.cpp:52
TRACK_BIT_3WAY_SE
@ TRACK_BIT_3WAY_SE
"Arrow" to the south-east
Definition: track_type.h:47
MP_STATION
@ MP_STATION
A tile of a station.
Definition: tile_type.h:53
GetTunnelBridgeTransportType
TransportType GetTunnelBridgeTransportType(Tile t)
Tunnel: Get the transport type of the tunnel (road or rail) Bridge: Get the transport type of the bri...
Definition: tunnelbridge_map.h:39
DIAGDIR_BEGIN
@ DIAGDIR_BEGIN
Used for iterations.
Definition: direction_type.h:74
SF_TRAIN
@ SF_TRAIN
train found in segment
Definition: signal.cpp:247
SmallSet::Overflowed
bool Overflowed()
Returns value of 'overflowed'.
Definition: signal.cpp:79
AddTrackToSignalBuffer
void AddTrackToSignalBuffer(TileIndex tile, Track track, Owner owner)
Add track to signal update buffer.
Definition: signal.cpp:578
SIGSEG_FULL
@ SIGSEG_FULL
Occupied by a train.
Definition: signal_func.h:51
SF_GREEN
@ SF_GREEN
green exitsignal found
Definition: signal.cpp:250
GetOtherTunnelBridgeEnd
TileIndex GetOtherTunnelBridgeEnd(Tile t)
Determines type of the wormhole and returns its other end.
Definition: tunnelbridge_map.h:78
_globset
static SmallSet< DiagDirection, SIG_GLOB_SIZE > _globset("_globset")
set of places to be updated in following runs
DECLARE_ENUM_AS_BIT_SET
DECLARE_ENUM_AS_BIT_SET(GenderEthnicity) enum CompanyManagerFaceVariable
Bitgroups of the CompanyManagerFace variable.
Definition: company_manager_face.h:29
TrackBits
TrackBits
Allow incrementing of Track variables.
Definition: track_type.h:35
TRACKDIR_BIT_Y_SE
@ TRACKDIR_BIT_Y_SE
Track y-axis, direction south-east.
Definition: track_type.h:101
SmallSet::Reset
void Reset()
Reset variables to default values.
Definition: signal.cpp:69
station_map.h
TRACKDIR_BIT_RIGHT_N
@ TRACKDIR_BIT_RIGHT_N
Track right, direction north.
Definition: track_type.h:112
IsStationTileBlocked
bool IsStationTileBlocked(Tile t)
Is tile t a blocked tile?
Definition: station_map.h:338
Trackdir
Trackdir
Enumeration for tracks and directions.
Definition: track_type.h:67
VEH_TRAIN
@ VEH_TRAIN
Train vehicle type.
Definition: vehicle_type.h:24
Pool::PoolItem<&_company_pool >::IsValidID
static bool IsValidID(size_t index)
Tests whether given index can be used to get valid (non-nullptr) Titem.
Definition: pool_type.hpp:328
BaseVehicle::type
VehicleType type
Type of vehicle.
Definition: vehicle_type.h:51
SmallSet::Remove
bool Remove(TileIndex tile, Tdir dir)
Tries to remove first instance of given tile and dir.
Definition: signal.cpp:118
TrackdirBits
TrackdirBits
Allow incrementing of Trackdir variables.
Definition: track_type.h:98
_tbdset
static SmallSet< DiagDirection, SIG_TBD_SIZE > _tbdset("_tbdset")
set of open nodes in current signal block
Track
Track
These are used to specify a single track.
Definition: track_type.h:19
DIAGDIR_NE
@ DIAGDIR_NE
Northeast, upper right on your monitor.
Definition: direction_type.h:75
TRACK_BIT_3WAY_NW
@ TRACK_BIT_3WAY_NW
"Arrow" to the north-west
Definition: track_type.h:49
SetSignalStateByTrackdir
void SetSignalStateByTrackdir(Tile tile, Trackdir trackdir, SignalState state)
Sets the state of the signal along the given trackdir.
Definition: rail_map.h:449
TRACKDIR_BIT_UPPER_W
@ TRACKDIR_BIT_UPPER_W
Track upper, direction west.
Definition: track_type.h:109
CheckAddToTodoSet
static bool CheckAddToTodoSet(TileIndex t1, DiagDirection d1, TileIndex t2, DiagDirection d2)
Perform some operations before adding data into Todo set The new and reverse direction is removed fro...
Definition: signal.cpp:212
SIGSEG_FREE
@ SIGSEG_FREE
Free and has no pre-signal exits or at least one green exit.
Definition: signal_func.h:50
debug.h
TRACKDIR_BIT_X_SW
@ TRACKDIR_BIT_X_SW
Track x-axis, direction south-west.
Definition: track_type.h:107
HasSignalOnTrackdir
bool HasSignalOnTrackdir(Tile tile, Trackdir trackdir)
Checks for the presence of signals along the given trackdir on the given rail tile.
Definition: rail_map.h:426
GetTunnelBridgeDirection
DiagDirection GetTunnelBridgeDirection(Tile t)
Get the direction pointing to the other end.
Definition: tunnelbridge_map.h:26
FindFirstBit
constexpr uint8_t FindFirstBit(T x)
Search the first set bit in a value.
Definition: bitmath_func.hpp:194