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
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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
18 * in all copies or substantial portions of the Software.
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,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
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 OSRPJDeleter
48 {
49 void operator()(PJ *pj) const
50 {
51 proj_destroy(pj);
52 }
53 };
54 typedef std::unique_ptr<PJ, OSRPJDeleter> UniquePtrPJ;
55
56 struct EPSGCacheKey
57 {
58 int nCode_;
59 bool bUseNonDeprecated_;
60 bool bAddTOWGS84_;
61
62 EPSGCacheKey(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84)
63 : nCode_(nCode), bUseNonDeprecated_(bUseNonDeprecated),
64 bAddTOWGS84_(bAddTOWGS84)
65 {
66 }
67
68 bool operator==(const EPSGCacheKey &other) const
69 {
70 return nCode_ == other.nCode_ &&
71 bUseNonDeprecated_ == other.bUseNonDeprecated_ &&
72 bAddTOWGS84_ == other.bAddTOWGS84_;
73 }
74 };
75 struct EPSGCacheKeyHasher
76 {
77 std::size_t operator()(const EPSGCacheKey &k) const
78 {
79 return k.nCode_ | ((k.bUseNonDeprecated_ ? 1 : 0) << 16) |
80 ((k.bAddTOWGS84_ ? 1 : 0) << 17);
81 }
82 };
83
84 PJ_CONTEXT *m_tlsContext =
85 nullptr; // never use it directly. use GetPJContext()
86 lru11::Cache<EPSGCacheKey, UniquePtrPJ, lru11::NullLock,
87 std::unordered_map<EPSGCacheKey,
88 typename std::list<lru11::KeyValuePair<
89 EPSGCacheKey, UniquePtrPJ>>::iterator,
90 EPSGCacheKeyHasher>>
91 m_oCacheEPSG{};
92 lru11::Cache<std::string, UniquePtrPJ> m_oCacheWKT{};
93
94 PJ_CONTEXT *GetPJContext();
95
96 OSRProjTLSCache(const OSRProjTLSCache &) = delete;
97 OSRProjTLSCache &operator=(const OSRProjTLSCache &) = delete;
98
99 public:
100 explicit OSRProjTLSCache(PJ_CONTEXT *tlsContext) : m_tlsContext(tlsContext)
101 {
102 }
103
104 void clear();
105
106 PJ *GetPJForEPSGCode(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84);
107 void CachePJForEPSGCode(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84,
108 PJ *pj);
109
110 PJ *GetPJForWKT(const std::string &wkt);
111 void CachePJForWKT(const std::string &wkt, PJ *pj);
112 };
113
114 OSRProjTLSCache *OSRGetProjTLSCache();
115
116 void OGRCTDumpStatistics();
117
118 void OSRCTCleanCache();
119
122 #endif