Line data    Source code

       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             : 
      40             : /*! @cond Doxygen_Suppress */
      41             : 
      42             : PJ_CONTEXT *OSRGetProjTLSContext();
      43             : void OSRCleanupTLSContext();
      44             : 
      45             : class OSRProjTLSCache
      46             : {
      47             :     struct OSRPJDeleter
      48             :     {
      49        9134 :         void operator()(PJ *pj) const
      50             :         {
      51        9134 :             proj_destroy(pj);
      52        9134 :         }
      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       38560 :         EPSGCacheKey(int nCode, bool bUseNonDeprecated, bool bAddTOWGS84)
      64       38560 :             : nCode_(nCode), bUseNonDeprecated_(bUseNonDeprecated),
      65       38560 :               bAddTOWGS84_(bAddTOWGS84)
      66             :         {
      67       38560 :         }
      68             : 
      69       28892 :         bool operator==(const EPSGCacheKey &other) const
      70             :         {
      71       57784 :             return nCode_ == other.nCode_ &&
      72       57784 :                    bUseNonDeprecated_ == other.bUseNonDeprecated_ &&
      73       57784 :                    bAddTOWGS84_ == other.bAddTOWGS84_;
      74             :         }
      75             :     };
      76             : 
      77             :     struct EPSGCacheKeyHasher
      78             :     {
      79       52261 :         std::size_t operator()(const EPSGCacheKey &k) const
      80             :         {
      81       52261 :             return k.nCode_ | ((k.bUseNonDeprecated_ ? 1 : 0) << 16) |
      82       52261 :                    ((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        1168 :     explicit OSRProjTLSCache(PJ_CONTEXT *tlsContext) : m_tlsContext(tlsContext)
     103             :     {
     104        1168 :     }
     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             : 
     116             : OSRProjTLSCache *OSRGetProjTLSCache();
     117             : 
     118             : void OGRCTDumpStatistics();
     119             : 
     120             : void OSRCTCleanCache();
     121             : 
     122             : /*! @endcond Doxygen_Suppress */
     123             : 
     124             : #endif