author | KUDr |
Mon, 29 May 2006 15:04:42 +0000 | |
changeset 3912 | 08c70885ec45 |
parent 3900 | 2c84ed52709d |
child 3914 | 6bdd22b93698 |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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#ifndef YAPF_COSTCACHE_HPP |
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#define YAPF_COSTCACHE_HPP |
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/** CYapfSegmentCostCacheNoneT - the formal only yapf cost cache provider that implements |
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PfNodeCacheFetch() and PfNodeCacheFlush() callbacks. Used when nodes don't have CachedData |
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defined (they don't count with any segment cost caching). |
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*/ |
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template <class Types> |
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class CYapfSegmentCostCacheNoneT |
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{ |
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public: |
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typedef typename Types::Tpf Tpf; |
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typedef typename Types::NodeList::Titem Node; ///< this will be our node type |
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FORCEINLINE bool PfNodeCacheFetch(Node& n) |
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{ |
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return false; |
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}; |
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FORCEINLINE void PfNodeCacheFlush(Node& n) |
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{ |
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}; |
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}; |
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/** CYapfSegmentCostCacheLocalT - the yapf cost cache provider that implements fake segment |
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cost caching functionality for yapf. Used when node needs caching, but you don't want to |
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cache the segment costs. |
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*/ |
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template <class Types> |
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class CYapfSegmentCostCacheLocalT |
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{ |
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public: |
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typedef typename Types::Tpf Tpf; |
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typedef typename Types::NodeList::Titem Node; ///< this will be our node type |
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typedef typename Node::Key Key; ///< key to hash tables |
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typedef typename Node::CachedData CachedData; |
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typedef typename CachedData::Key CacheKey; |
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typedef CArrayT<CachedData> LocalCache; |
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protected: |
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LocalCache m_local_cache; |
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FORCEINLINE Tpf& Yapf() {return *static_cast<Tpf*>(this);} |
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public: |
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FORCEINLINE bool PfNodeCacheFetch(Node& n) |
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{ |
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CacheKey key(n.GetKey()); |
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Yapf().ConnectNodeToCachedData(n, *new (&m_local_cache.AddNC()) CachedData(key)); |
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return false; |
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}; |
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FORCEINLINE void PfNodeCacheFlush(Node& n) |
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{ |
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}; |
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}; |
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struct CSegmentCostCacheBase |
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{ |
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static int s_rail_change_counter; |
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static void NotifyTrackLayoutChange(TileIndex tile, Track track) {s_rail_change_counter++;} |
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}; |
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/** CSegmentCostCacheT - template class providing hash-map and storage (heap) |
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of Tsegment structures. Each rail node contains pointer to the segment |
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that contains cached (or non-cached) segment cost information. Nodes can |
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differ by key type, but they use the same segment type. Segment key should |
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be always the same (TileIndex + DiagDirection) that represent the beginning |
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of the segment (origin tile and exit-dir from this tile). |
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Different CYapfCachedCostT types can share the same type of CSegmentCostCacheT. |
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Look at CYapfRailSegment (yapf_node_rail.hpp) for the segment example */ |
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template <class Tsegment> |
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struct CSegmentCostCacheT |
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: public CSegmentCostCacheBase |
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{ |
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enum {c_hash_bits = 14}; |
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typedef CHashTableT<Tsegment, c_hash_bits> HashTable; |
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typedef CArrayT<Tsegment> Heap; |
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typedef typename Tsegment::Key Key; ///< key to hash table |
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HashTable m_map; |
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Heap m_heap; |
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FORCEINLINE CSegmentCostCacheT() {} |
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FORCEINLINE Tsegment& Get(Key& key, bool *found) |
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{ |
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Tsegment* item = &m_map.Find(key); |
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if (item == NULL) { |
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*found = false; |
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item = new (&m_heap.AddNC()) Tsegment(key); |
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m_map.Push(*item); |
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} else { |
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*found = true; |
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} |
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return *item; |
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} |
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}; |
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/** CYapfSegmentCostCacheGlobalT - the yapf cost cache provider that adds the segment cost |
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110 |
caching functionality to yapf. Using this class as base of your will provide the global |
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111 |
segment cost caching services for your Nodes. |
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112 |
*/ |
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113 |
template <class Types> |
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114 |
class CYapfSegmentCostCacheGlobalT |
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115 |
: public CYapfSegmentCostCacheLocalT<Types> |
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116 |
{ |
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117 |
public: |
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118 |
typedef CYapfSegmentCostCacheLocalT<Types> Tlocal; |
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119 |
typedef typename Types::Tpf Tpf; |
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120 |
typedef typename Types::NodeList::Titem Node; ///< this will be our node type |
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121 |
typedef typename Node::Key Key; ///< key to hash tables |
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122 |
typedef typename Node::CachedData CachedData; |
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123 |
typedef typename CachedData::Key CacheKey; |
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typedef CSegmentCostCacheT<CachedData> Cache; |
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125 |
|
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126 |
protected: |
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127 |
Cache& m_global_cache; |
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128 |
|
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129 |
FORCEINLINE CYapfSegmentCostCacheGlobalT() : m_global_cache(stGetGlobalCache()) {}; |
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130 |
|
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131 |
FORCEINLINE Tpf& Yapf() {return *static_cast<Tpf*>(this);} |
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132 |
|
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133 |
FORCEINLINE static Cache*& stGlobalCachePtr() {static Cache* pC = NULL; return pC;} |
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134 |
|
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135 |
FORCEINLINE static Cache& stGetGlobalCache() |
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136 |
{ |
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137 |
static int last_rail_change_counter = 0; |
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138 |
static uint32 last_day = 0; |
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139 |
|
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140 |
// some statistics |
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141 |
if (last_day != _date) { |
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142 |
last_day = _date; |
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143 |
DEBUG(yapf, 1)("pf time today:%5d ms\n", _total_pf_time_us / 1000); |
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144 |
_total_pf_time_us = 0; |
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145 |
} |
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146 |
|
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147 |
Cache*& pC = stGlobalCachePtr(); |
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148 |
|
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149 |
// delete the cache sometimes... |
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150 |
if (pC != NULL && last_rail_change_counter != Cache::s_rail_change_counter) { |
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151 |
last_rail_change_counter = Cache::s_rail_change_counter; |
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152 |
delete pC; |
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153 |
pC = NULL; |
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154 |
} |
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155 |
|
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156 |
if (pC == NULL) |
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157 |
pC = new Cache(); |
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158 |
return *pC; |
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159 |
} |
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160 |
|
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161 |
public: |
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162 |
FORCEINLINE bool PfNodeCacheFetch(Node& n) |
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163 |
{ |
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164 |
if (!Yapf().CanUseGlobalCache(n)) { |
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165 |
return Tlocal::PfNodeCacheFetch(n); |
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166 |
} |
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167 |
CacheKey key(n.GetKey()); |
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168 |
bool found; |
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169 |
CachedData& item = m_global_cache.Get(key, &found); |
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170 |
Yapf().ConnectNodeToCachedData(n, item); |
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171 |
return found; |
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172 |
}; |
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173 |
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174 |
FORCEINLINE void PfNodeCacheFlush(Node& n) |
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175 |
{ |
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176 |
}; |
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177 |
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178 |
}; |
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179 |
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180 |
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181 |
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182 |
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183 |
#endif /* YAPF_COSTCACHE_HPP */ |