GDAL
ogr_proj_p.h
1 /******************************************************************************
2  *
3  * Project: GDAL
4  * Purpose: Private header
5  * Author: Even Rouault <even dot rouault at spatialys dot com>
6  *
7  ******************************************************************************
8  * Copyright (c) 2018, Even Rouault <even dot rouault at spatialys dot com>
9  *
10  * Permission is hereby granted, free of charge, to any person obtaining a
11  * copy of this software and associated documentation files (the "Software"),
12  * to deal in the Software without restriction, including without limitation
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14  * and/or sell copies of the Software, and to permit persons to whom the
15  * Software is furnished to do so, subject to the following conditions:
16  *
17  * The above copyright notice and this permission notice shall be included
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19  *
20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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27  ****************************************************************************/
28 
29 #ifndef OGR_PROJ_P_H_INCLUDED
30 #define OGR_PROJ_P_H_INCLUDED
31 
32 #include "proj.h"
33 
34 #include "cpl_mem_cache.h"
35 
36 #include <unordered_map>
37 #include <memory>
38 #include <utility>
39 
42 PJ_CONTEXT* OSRGetProjTLSContext();
43 void OSRCleanupTLSContext();
44 
45 class OSRProjTLSCache
46 {
47  struct EPSGCacheKey
48  {
49  int nCode_;
50  bool bUseNonDeprecated_;
51  bool bAddTOWGS84_;
52 
53  EPSGCacheKey(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84):
54  nCode_(nCode), bUseNonDeprecated_(bUseNonDeprecated), bAddTOWGS84_(bAddTOWGS84) {}
55 
56  bool operator==(const EPSGCacheKey& other) const
57  {
58  return nCode_ == other.nCode_ &&
59  bUseNonDeprecated_ == other.bUseNonDeprecated_ &&
60  bAddTOWGS84_ == other.bAddTOWGS84_;
61  }
62  };
63  struct EPSGCacheKeyHasher
64  {
65  std::size_t operator()(const EPSGCacheKey& k) const
66  {
67  return k.nCode_ |
68  ((k.bUseNonDeprecated_ ? 1 : 0) << 16) |
69  ((k.bAddTOWGS84_ ? 1 : 0) << 17);
70  }
71  };
72 
73  lru11::Cache<EPSGCacheKey, std::shared_ptr<PJ>,
74  lru11::NullLock,
75  std::unordered_map<
76  EPSGCacheKey,
77  typename std::list<lru11::KeyValuePair<EPSGCacheKey,
78  std::shared_ptr<PJ>>>::iterator,
79  EPSGCacheKeyHasher>> m_oCacheEPSG{};
80  lru11::Cache<std::string, std::shared_ptr<PJ>> m_oCacheWKT{};
81 
82  public:
83  OSRProjTLSCache() = default;
84 
85  void clear();
86 
87  PJ* GetPJForEPSGCode(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84);
88  void CachePJForEPSGCode(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84, PJ* pj);
89 
90  PJ* GetPJForWKT(const std::string& wkt);
91  void CachePJForWKT(const std::string& wkt, PJ* pj);
92 };
93 
94 OSRProjTLSCache* OSRGetProjTLSCache();
95 
96 void OGRCTDumpStatistics();
97 
98 void OSRCTCleanCache();
99 
102 #endif