--- a/src/order.h	Thu Aug 02 23:21:52 2007 +0000
+++ b/src/order.h	Thu Aug 02 23:40:19 2007 +0000
@@ -83,26 +83,30 @@
 	CO_UNSHARE = 2
 };
 
+struct Order;
+DECLARE_OLD_POOL(Order, Order, 6, 1000)
+
 /* If you change this, keep in mind that it is saved on 3 places:
  * - Load_ORDR, all the global orders
  * - Vehicle -> current_order
  * - REF_ORDER (all REFs are currently limited to 16 bits!!)
  */
-struct Order {
+struct Order : PoolItem<Order, OrderID, &_Order_pool> {
 	Order *next;          ///< Pointer to next order. If NULL, end of list
 
 	OrderTypeByte type;
 	uint8  flags;
 	DestinationID dest;   ///< The destionation of the order.
 
-	OrderID index;         ///< Index of the order, is not saved or anything, just for reference
-
 	CargoID refit_cargo; // Refit CargoID
 	byte refit_subtype; // Refit subtype
 
 	uint16 wait_time;    ///< How long in ticks to wait at the destination.
 	uint16 travel_time;  ///< How long in ticks the journey to this destination should take.
 
+	Order() : refit_cargo(CT_NO_REFIT) {}
+	~Order() { this->type = OT_NOTHING; }
+
 	bool IsValid() const;
 	void Free();
 	void FreeChain();
@@ -121,8 +125,6 @@
 VARDEF TileIndex _backup_orders_tile;
 VARDEF BackuppedOrders _backup_orders_data[1];
 
-DECLARE_OLD_POOL(Order, Order, 6, 1000)
-
 static inline VehicleOrderID GetMaxOrderIndex()
 {
 	/* TODO - This isn't the real content of the function, but
@@ -143,21 +145,21 @@
  */
 inline bool Order::IsValid() const
 {
-	return type != OT_NOTHING;
+	return this->type != OT_NOTHING;
 }
 
 inline void Order::Free()
 {
-	type  = OT_NOTHING;
-	flags = 0;
-	dest  = 0;
-	next  = NULL;
+	this->type  = OT_NOTHING;
+	this->flags = 0;
+	this->dest  = 0;
+	this->next  = NULL;
 }
 
 inline void Order::FreeChain()
 {
 	if (next != NULL) next->FreeChain();
-	Free();
+	delete this;
 }
 
 #define FOR_ALL_ORDERS_FROM(order, start) for (order = GetOrder(start); order != NULL; order = (order->index + 1U < GetOrderPoolSize()) ? GetOrder(order->index + 1U) : NULL) if (order->IsValid())

--- a/src/order_cmd.cpp	Thu Aug 02 23:21:52 2007 +0000
+++ b/src/order_cmd.cpp	Thu Aug 02 23:40:19 2007 +0000
@@ -20,19 +20,7 @@
 #include "cargotype.h"
 #include "strings.h"
 
-/**
- * Called if a new block is added to the order-pool
- */
-static void OrderPoolNewBlock(uint start_item)
-{
-	Order *order;
-
-	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
-	 * TODO - This is just a temporary stage, this will be removed. */
-	for (order = GetOrder(start_item); order != NULL; order = (order->index + 1U < GetOrderPoolSize()) ? GetOrder(order->index + 1U) : NULL) order->index = start_item++;
-}
-
-DEFINE_OLD_POOL(Order, Order, OrderPoolNewBlock, NULL)
+DEFINE_OLD_POOL_GENERIC(Order, Order)
 
 /**
  *
@@ -113,41 +101,6 @@
 
 /**
  *
- * Allocate a new order
- *
- * @return Order* if a free space is found, else NULL.
- *
- */
-static Order *AllocateOrder()
-{
-	Order *order;
-
-	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
-	 * TODO - This is just a temporary stage, this will be removed. */
-	for (order = GetOrder(0); order != NULL; order = (order->index + 1U < GetOrderPoolSize()) ? GetOrder(order->index + 1U) : NULL) {
-		if (!order->IsValid()) {
-			OrderID index = order->index;
-
-			memset(order, 0, sizeof(*order));
-			order->index = index;
-			order->next = NULL;
-			order->refit_cargo   = CT_NO_REFIT;
-			order->refit_subtype = 0;
-			order->wait_time     = 0;
-			order->travel_time   = 0;
-
-			return order;
-		}
-	}
-
-	/* Check if we can add a block to the pool */
-	if (AddBlockToPool(&_Order_pool)) return AllocateOrder();
-
-	return NULL;
-}
-
-/**
- *
  * Assign data to an order (from an other order)
  *   This function makes sure that the index is maintained correctly
  *
@@ -395,7 +348,7 @@
 
 	if (flags & DC_EXEC) {
 		Vehicle *u;
-		Order *new_o = AllocateOrder();
+		Order *new_o = new Order();
 		AssignOrder(new_o, new_order);
 
 		/* Create new order and link in list */
@@ -890,7 +843,7 @@
 
 				order_dst = &dst->orders;
 				FOR_VEHICLE_ORDERS(src, order) {
-					*order_dst = AllocateOrder();
+					*order_dst = new Order();
 					AssignOrder(*order_dst, *order);
 					order_dst = &(*order_dst)->next;
 				}
@@ -1367,10 +1320,8 @@
 			SlArray(orders, len, SLE_UINT16);
 
 			for (i = 0; i < len; ++i) {
-				if (!AddBlockIfNeeded(&_Order_pool, i))
-					error("Orders: failed loading savegame: too many orders");
-
-				AssignOrder(GetOrder(i), UnpackVersion4Order(orders[i]));
+				Order *order = new (i) Order();
+				AssignOrder(order, UnpackVersion4Order(orders[i]));
 			}
 		} else if (CheckSavegameVersionOldStyle(5, 2)) {
 			uint32 orders[5000];
@@ -1381,10 +1332,8 @@
 			SlArray(orders, len, SLE_UINT32);
 
 			for (i = 0; i < len; ++i) {
-				if (!AddBlockIfNeeded(&_Order_pool, i))
-					error("Orders: failed loading savegame: too many orders");
-
-				AssignOrder(GetOrder(i), UnpackOrder(orders[i]));
+				Order *order = new (i) Order();
+				AssignOrder(order, UnpackOrder(orders[i]));
 			}
 		}
 
@@ -1400,12 +1349,7 @@
 		int index;
 
 		while ((index = SlIterateArray()) != -1) {
-			Order *order;
-
-			if (!AddBlockIfNeeded(&_Order_pool, index))
-				error("Orders: failed loading savegame: too many orders");
-
-			order = GetOrder(index);
+			Order *order = new (index) Order();
 			SlObject(order, _order_desc);
 		}
 	}