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
42PJ_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
55 typedef std::unique_ptr<PJ, OSRPJDeleter> UniquePtrPJ;
56
57 struct EPSGCacheKey
58 {
59 int nCode_;
60 bool bUseNonDeprecated_;
61 bool bAddTOWGS84_;
62
63 EPSGCacheKey(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84)
64 : nCode_(nCode), bUseNonDeprecated_(bUseNonDeprecated),
65 bAddTOWGS84_(bAddTOWGS84)
66 {
67 }
68
69 bool operator==(const EPSGCacheKey &other) const
70 {
71 return nCode_ == other.nCode_ &&
72 bUseNonDeprecated_ == other.bUseNonDeprecated_ &&
73 bAddTOWGS84_ == other.bAddTOWGS84_;
74 }
75 };
76
77 struct EPSGCacheKeyHasher
78 {
79 std::size_t operator()(const EPSGCacheKey &k) const
80 {
81 return k.nCode_ | ((k.bUseNonDeprecated_ ? 1 : 0) << 16) |
82 ((k.bAddTOWGS84_ ? 1 : 0) << 17);
83 }
84 };
85
86 PJ_CONTEXT *m_tlsContext =
87 nullptr; // never use it directly. use GetPJContext()
88 lru11::Cache<EPSGCacheKey, UniquePtrPJ, lru11::NullLock,
89 std::unordered_map<EPSGCacheKey,
90 typename std::list<lru11::KeyValuePair<
91 EPSGCacheKey, UniquePtrPJ>>::iterator,
92 EPSGCacheKeyHasher>>
93 m_oCacheEPSG{};
94 lru11::Cache<std::string, UniquePtrPJ> m_oCacheWKT{};
95
96 PJ_CONTEXT *GetPJContext();
97
98 OSRProjTLSCache(const OSRProjTLSCache &) = delete;
99 OSRProjTLSCache &operator=(const OSRProjTLSCache &) = delete;
100
101 public:
102 explicit OSRProjTLSCache(PJ_CONTEXT *tlsContext) : m_tlsContext(tlsContext)
103 {
104 }
105
106 void clear();
107
108 PJ *GetPJForEPSGCode(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84);
109 void CachePJForEPSGCode(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84,
110 PJ *pj);
111
112 PJ *GetPJForWKT(const std::string &wkt);
113 void CachePJForWKT(const std::string &wkt, PJ *pj);
114};
115
116OSRProjTLSCache *OSRGetProjTLSCache();
117
118 void OGRCTDumpStatistics();
119
120 void OSRCTCleanCache();
121
124#endif