From 13e23141b418214db51e1463bb3696a4e6d87129 Mon Sep 17 00:00:00 2001
From: smatz <smatz@openttd.org>
Date: Sat, 8 Aug 2009 20:53:36 +0000
Subject: (svn r17124) -Codechange: store subsidies in a pool (instead of an
 array)

---
 src/subsidy_base.h | 68 +++++++++---------------------------------------------
 1 file changed, 11 insertions(+), 57 deletions(-)

(limited to 'src/subsidy_base.h')

diff --git a/src/subsidy_base.h b/src/subsidy_base.h
index 4367334cb..015c773cc 100644
--- a/src/subsidy_base.h
+++ b/src/subsidy_base.h
@@ -8,9 +8,13 @@
 #include "cargo_type.h"
 #include "company_type.h"
 #include "subsidy_type.h"
+#include "core/pool_type.hpp"
+
+typedef Pool<Subsidy, SubsidyID, 1, MAX_COMPANIES> SubsidyPool;
+extern SubsidyPool _subsidy_pool;
 
 /** Struct about subsidies, offered and awarded */
-struct Subsidy {
+struct Subsidy : SubsidyPool::PoolItem<&_subsidy_pool> {
 	CargoID cargo_type;      ///< Cargo type involved in this subsidy, CT_INVALID for invalid subsidy
 	byte remaining;          ///< Remaining months when this subsidy is valid
 	CompanyByte awarded;     ///< Subsidy is awarded to this company; INVALID_COMPANY if it's not awarded to anyone
@@ -19,6 +23,11 @@ struct Subsidy {
 	SourceID src;            ///< Index of source. Either TownID or IndustryID
 	SourceID dst;            ///< Index of destination. Either TownID or IndustryID
 
+	/**
+	 * We need an (empty) constructor so struct isn't zeroed (as C++ standard states)
+	 */
+	FORCEINLINE Subsidy() { }
+
 	/**
 	 * Tests whether this subsidy has been awarded to someone
 	 * @return is this subsidy awarded?
@@ -29,60 +38,6 @@ struct Subsidy {
 	}
 
 	void AwardTo(CompanyID company);
-
-	/**
-	 * Determines index of this subsidy
-	 * @return index (in the Subsidy::array array)
-	 */
-	FORCEINLINE SubsidyID Index() const
-	{
-		return this - Subsidy::array;
-	}
-
-	/**
-	 * Tests for validity of this subsidy
-	 * @return is this subsidy valid?
-	 */
-	FORCEINLINE bool IsValid() const
-	{
-		return this->cargo_type != CT_INVALID;
-	}
-
-
-	static Subsidy array[MAX_COMPANIES]; ///< Array holding all subsidies
-
-	/**
-	 * Total number of subsidies, both valid and invalid
-	 * @return length of Subsidy::array
-	 */
-	static FORCEINLINE size_t GetArraySize()
-	{
-		return lengthof(Subsidy::array);
-	}
-
-	/**
-	 * Tests whether given index is an index of valid subsidy
-	 * @param index index to check
-	 * @return can this index be used to access a valid subsidy?
-	 */
-	static FORCEINLINE bool IsValidID(size_t index)
-	{
-		return index < Subsidy::GetArraySize() && Subsidy::Get(index)->IsValid();
-	}
-
-	/**
-	 * Returns pointer to subsidy with given index
-	 * @param index index of subsidy
-	 * @return pointer to subsidy with given index
-	 */
-	static FORCEINLINE Subsidy *Get(size_t index)
-	{
-		assert(index < Subsidy::GetArraySize());
-		return &Subsidy::array[index];
-	}
-
-	static Subsidy *AllocateItem();
-	static void Clean();
 };
 
 /** Constants related to subsidies */
@@ -95,8 +50,7 @@ enum {
 	SUBSIDY_MAX_DISTANCE         =  70, ///< Max. length of subsidised route (DistanceManhattan)
 };
 
-#define FOR_ALL_SUBSIDIES_FROM(var, start) for (size_t subsidy_index = start; var = NULL, subsidy_index < Subsidy::GetArraySize(); subsidy_index++) \
-		if ((var = Subsidy::Get(subsidy_index))->IsValid())
+#define FOR_ALL_SUBSIDIES_FROM(var, start) FOR_ALL_ITEMS_FROM(Subsidy, subsidy_index, var, start)
 #define FOR_ALL_SUBSIDIES(var) FOR_ALL_SUBSIDIES_FROM(var, 0)
 
 #endif /* SUBSIDY_BASE_H */
-- 
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