(svn r12855) -Codechange: do not use autoptr's for testing whether certain objects can be build, but check it directly in the pool so we do not have to call destructors in the testing phase. Stations still use the autoptr though.

src/engine.cpp

@@ -15,7 +15,6 @@
 #include "aircraft.h"
 #include "newgrf_cargo.h"
 #include "group.h"
-#include "misc/autoptr.hpp"
 #include "strings_func.h"
 #include "gfx_func.h"
 #include "functions.h"
@@ -516,19 +515,15 @@ CommandCost AddEngineReplacement(EngineRenewList *erl, EngineID old_engine, Engi
 		return CommandCost();
 	}
 
-	er = new EngineRenew(old_engine, new_engine);
-	if (er == NULL) return CMD_ERROR;
-	AutoPtrT<EngineRenew> er_auto_delete = er;
-
+	if (!EngineRenew::CanAllocateItem()) return CMD_ERROR;
 
 	if (flags & DC_EXEC) {
+		er = new EngineRenew(old_engine, new_engine);
 		er->group_id = group;
 
 		/* Insert before the first element */
 		er->next = (EngineRenew *)(*erl);
 		*erl = (EngineRenewList)er;
-
-		er_auto_delete.Detach();
 	}
 
 	return CommandCost();

src/group_cmd.cpp

@@ -12,7 +12,6 @@
 #include "train.h"
 #include "aircraft.h"
 #include "vehicle_gui.h"
-#include "misc/autoptr.hpp"
 #include "strings_func.h"
 #include "functions.h"
 #include "window_func.h"
@@ -94,20 +93,14 @@ CommandCost CmdCreateGroup(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 	VehicleType vt = (VehicleType)p1;
 	if (!IsPlayerBuildableVehicleType(vt)) return CMD_ERROR;
 
-	AutoPtrT<Group> g_auto_delete;
-
-	Group *g = new Group(_current_player);
-	if (g == NULL) return CMD_ERROR;
-
-	g_auto_delete = g;
+	if (!Group::CanAllocateItem()) return CMD_ERROR;
 
 	if (flags & DC_EXEC) {
+		Group *g = new Group(_current_player);
 		g->replace_protection = false;
 		g->vehicle_type = vt;
 
 		InvalidateWindowData(GetWCForVT(vt), (vt << 11) | VLW_GROUP_LIST | _current_player);
-
-		g_auto_delete.Detach();
 	}
 
 	return CommandCost();

src/industry_cmd.cpp

@@ -26,7 +26,6 @@
 #include "newgrf_industries.h"
 #include "newgrf_industrytiles.h"
 #include "newgrf_callbacks.h"
-#include "misc/autoptr.hpp"
 #include "autoslope.h"
 #include "transparency.h"
 #include "water.h"
@@ -1592,17 +1591,19 @@ static Industry *CreateNewIndustryHelper(TileIndex tile, IndustryType type, uint
 	if (!CheckIfIndustryIsAllowed(tile, type, t)) return NULL;
 	if (!CheckSuitableIndustryPos(tile)) return NULL;
 
-	Industry *i = new Industry(tile);
-	if (i == NULL) return NULL;
-	AutoPtrT<Industry> i_auto_delete = i;
+	if (!Industry::CanAllocateItem()) return NULL;
 
 	if (flags & DC_EXEC) {
+		Industry *i = new Industry(tile);
 		if (!custom_shape_check) CheckIfCanLevelIndustryPlatform(tile, DC_EXEC, it, type);
 		DoCreateNewIndustry(i, tile, type, it, itspec_index, t, OWNER_NONE);
-		i_auto_delete.Detach();
+
+		return i;
 	}
 
-	return i;
+	/* We need to return a non-NULL pointer to tell we have created an industry.
+	 * However, we haven't created a real one (no DC_EXEC), so return a fake one. */
+	return GetIndustry(0);
 }
 
 /** Build/Fund an industry

src/oldpool.h

@@ -292,6 +292,18 @@ protected:
 	{
 		return Tpool->CleaningPool();
 	}
+
+public:
+	/**
+	 * Check whether we can allocate an item in this pool. This to prevent the
+	 * need to actually construct the object and then destructing it again,
+	 * which could be *very* costly.
+	 * @return true if and only if at least ONE item can be allocated.
+	 */
+	static inline bool CanAllocateItem()
+	{
+		return AllocateRaw() != NULL;
+	}
 };
 
 

src/rail_cmd.cpp

@@ -30,7 +30,6 @@
 #include "newgrf_callbacks.h"
 #include "newgrf_station.h"
 #include "train.h"
-#include "misc/autoptr.hpp"
 #include "variables.h"
 #include "autoslope.h"
 #include "transparency.h"
@@ -766,12 +765,10 @@ CommandCost CmdBuildTrainDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p
 
 	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
 
-	Depot *d = new Depot(tile);
-
-	if (d == NULL) return CMD_ERROR;
-	AutoPtrT<Depot> d_auto_delete = d;
+	if (!Depot::CanAllocateItem()) return CMD_ERROR;
 
 	if (flags & DC_EXEC) {
+		Depot *d = new Depot(tile);
 		MakeRailDepot(tile, _current_player, dir, (RailType)p1);
 		MarkTileDirtyByTile(tile);
 
@@ -779,7 +776,6 @@ CommandCost CmdBuildTrainDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p
 
 		AddSideToSignalBuffer(tile, INVALID_DIAGDIR, _current_player);
 		YapfNotifyTrackLayoutChange(tile, TrackdirToTrack(DiagdirToDiagTrackdir(dir)));
-		d_auto_delete.Detach();
 	}
 
 	return cost.AddCost(_price.build_train_depot);

src/road_cmd.cpp

@@ -23,7 +23,6 @@
 #include "newgrf.h"
 #include "station_map.h"
 #include "tunnel_map.h"
-#include "misc/autoptr.hpp"
 #include "variables.h"
 #include "autoslope.h"
 #include "transparency.h"
@@ -817,16 +816,14 @@ CommandCost CmdBuildRoadDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2
 
 	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
 
-	Depot *dep = new Depot(tile);
-	if (dep == NULL) return CMD_ERROR;
-	AutoPtrT<Depot> d_auto_delete = dep;
+	if (!Depot::CanAllocateItem()) return CMD_ERROR;
 
 	if (flags & DC_EXEC) {
+		Depot *dep = new Depot(tile);
 		dep->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
 
 		MakeRoadDepot(tile, _current_player, dir, rt);
 		MarkTileDirtyByTile(tile);
-		d_auto_delete.Detach();
 	}
 	return cost.AddCost(_price.build_road_depot);
 }

src/ship_cmd.cpp

@@ -28,7 +28,6 @@
 #include "newgrf_text.h"
 #include "newgrf_sound.h"
 #include "spritecache.h"
-#include "misc/autoptr.hpp"
 #include "strings_func.h"
 #include "functions.h"
 #include "window_func.h"

src/signs.cpp

@@ -11,7 +11,6 @@
 #include "saveload.h"
 #include "command_func.h"
 #include "variables.h"
-#include "misc/autoptr.hpp"
 #include "strings_func.h"
 #include "viewport_func.h"
 #include "zoom_func.h"
@@ -99,12 +98,11 @@ static void MarkSignDirty(Sign *si)
 CommandCost CmdPlaceSign(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 {
 	/* Try to locate a new sign */
-	Sign *si = new Sign(_current_player);
-	if (si == NULL) return_cmd_error(STR_2808_TOO_MANY_SIGNS);
-	AutoPtrT<Sign> s_auto_delete = si;
+	if (!Sign::CanAllocateItem()) return_cmd_error(STR_2808_TOO_MANY_SIGNS);
 
 	/* When we execute, really make the sign */
 	if (flags & DC_EXEC) {
+		Sign *si = new Sign(_current_player);
 		int x = TileX(tile) * TILE_SIZE;
 		int y = TileY(tile) * TILE_SIZE;
 
@@ -117,7 +115,6 @@ CommandCost CmdPlaceSign(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 		_sign_sort_dirty = true;
 		_new_sign_id = si->index;
 		_total_signs++;
-		s_auto_delete.Detach();
 	}
 
 	return CommandCost();

src/town_cmd.cpp

@@ -31,7 +31,6 @@
 #include "newgrf_house.h"
 #include "newgrf_commons.h"
 #include "newgrf_townname.h"
-#include "misc/autoptr.hpp"
 #include "autoslope.h"
 #include "waypoint.h"
 #include "transparency.h"
@@ -1538,16 +1537,14 @@ CommandCost CmdBuildTown(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 		return_cmd_error(STR_023A_TOO_MANY_TOWNS);
 
 	/* Allocate town struct */
-	Town *t = new Town(tile);
-	if (t == NULL) return_cmd_error(STR_023A_TOO_MANY_TOWNS);
-	AutoPtrT<Town> t_auto_delete = t;
+	if (!Town::CanAllocateItem()) return_cmd_error(STR_023A_TOO_MANY_TOWNS);
 
 	/* Create the town */
 	if (flags & DC_EXEC) {
+		Town *t = new Town(tile);
 		_generating_world = true;
 		DoCreateTown(t, tile, townnameparts, (TownSizeMode)p2, p1);
 		_generating_world = false;
-		t_auto_delete.Detach();
 	}
 	return CommandCost();
 }

src/water_cmd.cpp

@@ -24,7 +24,6 @@
 #include "industry_map.h"
 #include "newgrf.h"
 #include "newgrf_canal.h"
-#include "misc/autoptr.hpp"
 #include "transparency.h"
 #include "strings_func.h"
 #include "functions.h"
@@ -201,18 +200,16 @@ CommandCost CmdBuildShipDepot(TileIndex tile, uint32 flags, uint32 p1, uint32 p2
 	ret = DoCommand(tile2, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
 	if (CmdFailed(ret)) return CMD_ERROR;
 
-	Depot *depot = new Depot(tile);
-	if (depot == NULL) return CMD_ERROR;
-	AutoPtrT<Depot> d_auto_delete = depot;
+	if (!Depot::CanAllocateItem()) return CMD_ERROR;
 
 	if (flags & DC_EXEC) {
+		Depot *depot = new Depot(tile);
 		depot->town_index = ClosestTownFromTile(tile, (uint)-1)->index;
 
 		MakeShipDepot(tile,  _current_player, DEPOT_NORTH, axis, wc1);
 		MakeShipDepot(tile2, _current_player, DEPOT_SOUTH, axis, wc2);
 		MarkTileDirtyByTile(tile);
 		MarkTileDirtyByTile(tile2);
-		d_auto_delete.Detach();
 	}
 
 	return CommandCost(EXPENSES_CONSTRUCTION, _price.build_ship_depot);

src/waypoint.cpp

@@ -18,7 +18,6 @@
 #include "variables.h"
 #include "yapf/yapf.h"
 #include "newgrf.h"
-#include "misc/autoptr.hpp"
 #include "strings_func.h"
 #include "gfx_func.h"
 #include "functions.h"
@@ -191,7 +190,6 @@ void AfterLoadWaypoints()
 CommandCost CmdBuildTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 {
 	Waypoint *wp;
-	AutoPtrT<Waypoint> wp_auto_delete;
 	Slope tileh;
 	Axis axis;
 
@@ -219,35 +217,35 @@ CommandCost CmdBuildTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint3
 
 	/* Check if there is an already existing, deleted, waypoint close to us that we can reuse. */
 	wp = FindDeletedWaypointCloseTo(tile);
-	if (wp == NULL) {
-		wp = new Waypoint(tile);
-		if (wp == NULL) return CMD_ERROR;
+	if (wp == NULL && !Waypoint::CanAllocateItem()) return CMD_ERROR;
 
-		wp_auto_delete = wp;
+	if (flags & DC_EXEC) {
+		if (wp == NULL) {
+			wp = new Waypoint(tile);
+			if (wp == NULL) return CMD_ERROR;
 
-		wp->town_index = INVALID_TOWN;
-		wp->name = NULL;
-		wp->town_cn = 0;
-	} else if (flags & DC_EXEC) {
-		/* Move existing (recently deleted) waypoint to the new location */
-
-		/* First we update the destination for all vehicles that
-		 * have the old waypoint in their orders. */
-		Vehicle *v;
-		FOR_ALL_VEHICLES(v) {
-			if (v->type == VEH_TRAIN &&
-					v->First() == v &&
-					v->current_order.IsType(OT_GOTO_WAYPOINT) &&
-					v->dest_tile == wp->xy) {
-				v->dest_tile = tile;
+			wp->town_index = INVALID_TOWN;
+			wp->name = NULL;
+			wp->town_cn = 0;
+		} else {
+			/* Move existing (recently deleted) waypoint to the new location */
+
+			/* First we update the destination for all vehicles that
+			* have the old waypoint in their orders. */
+			Vehicle *v;
+			FOR_ALL_VEHICLES(v) {
+				if (v->type == VEH_TRAIN &&
+						v->First() == v &&
+						v->current_order.IsType(OT_GOTO_WAYPOINT) &&
+						v->dest_tile == wp->xy) {
+					v->dest_tile = tile;
+				}
 			}
-		}
 
-		RedrawWaypointSign(wp);
-		wp->xy = tile;
-	}
+			RedrawWaypointSign(wp);
+			wp->xy = tile;
+		}
 
-	if (flags & DC_EXEC) {
 		const StationSpec* statspec;
 
 		MakeRailWaypoint(tile, GetTileOwner(tile), axis, GetRailType(tile), wp->index);
@@ -274,7 +272,6 @@ CommandCost CmdBuildTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint3
 		UpdateWaypointSign(wp);
 		RedrawWaypointSign(wp);
 		YapfNotifyTrackLayoutChange(tile, AxisToTrack(axis));
-		wp_auto_delete.Detach();
 	}
 
 	return CommandCost(EXPENSES_CONSTRUCTION, _price.build_train_depot);