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(svn r23564) -Fix [FS#4888]: Extending a path reservation starting at a partially reserved rail station could fail.

This commit is contained in:
michi_cc 2011-12-17 02:02:28 +00:00
parent 719b4707dc
commit 24b7be856b
2 changed files with 21 additions and 5 deletions
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10
src/pathfinder/yapf/yapf_rail.cpp
View File

@ -58,6 +58,7 @@ private:
Node *m_res_node; ///< The reservation target node
TileIndex m_res_fail_tile; ///< The tile where the reservation failed
Trackdir m_res_fail_td; ///< The trackdir where the reservation failed
TileIndex m_origin_tile; ///< Tile our reservation will originate from
bool FindSafePositionProc(TileIndex tile, Trackdir td)
{
@ -80,7 +81,7 @@ private:
SetRailStationReservation(tile, true);
MarkTileDirtyByTile(tile);
tile = TILE_ADD(tile, diff);
} while (IsCompatibleTrainStationTile(tile, start));
} while (IsCompatibleTrainStationTile(tile, start) && tile != m_origin_tile);
return true;
}
@ -145,9 +146,10 @@ public:
}
/** Try to reserve the path till the reservation target. */
bool TryReservePath(PBSTileInfo *target)
bool TryReservePath(PBSTileInfo *target, TileIndex origin)
{
m_res_fail_tile = INVALID_TILE;
m_origin_tile = origin;
if (target != NULL) {
target->tile = m_res_dest;
@ -359,7 +361,7 @@ public:
this->FindSafePositionOnNode(pPrev);
}
return dont_reserve || this->TryReservePath(NULL);
return dont_reserve || this->TryReservePath(NULL, pNode->GetLastTile());
}
};
@ -452,7 +454,7 @@ public:
Node& best_next_node = *pPrev;
next_trackdir = best_next_node.GetTrackdir();
if (reserve_track && path_found) this->TryReservePath(target);
if (reserve_track && path_found) this->TryReservePath(target, pNode->GetLastTile());
}
/* Treat the path as found if stopped on the first two way signal(s). */

16
src/pbs.cpp
View File

@ -191,7 +191,21 @@ static PBSTileInfo FollowReservation(Owner o, RailTypes rts, TileIndex tile, Tra
TrackdirBits reserved = ft.m_new_td_bits & TrackBitsToTrackdirBits(GetReservedTrackbits(ft.m_new_tile));
/* No reservation --> path end found */
if (reserved == TRACKDIR_BIT_NONE) break;
if (reserved == TRACKDIR_BIT_NONE) {
if (ft.m_is_station) {
/* Check skipped station tiles as well, maybe our reservation ends inside the station. */
TileIndexDiff diff = TileOffsByDiagDir(ft.m_exitdir);
while (ft.m_tiles_skipped-- > 0) {
ft.m_new_tile -= diff;
if (HasStationReservation(ft.m_new_tile)) {
tile = ft.m_new_tile;
trackdir = DiagDirToDiagTrackdir(ft.m_exitdir);
break;
}
}
}
break;
}
/* Can't have more than one reserved trackdir */
Trackdir new_trackdir = FindFirstTrackdir(reserved);