text: /******************************************************************************
   * $Id$
   *
   * Project:  OpenGIS Simple Features Reference Implementation
   * Purpose:  Defines OGRLMutexedDataSource class
   * Author:   Even Rouault, even dot rouault at mines dash paris dot org
   *
   ******************************************************************************
   * Copyright (c) 2013, Even Rouault <even dot rouault at mines-paris dot org>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included
   * in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   ****************************************************************************/
  
  #ifndef OGRMUTEXEDDATASOURCELAYER_H_INCLUDED
  #define OGRMUTEXEDDATASOURCELAYER_H_INCLUDED
  
  #include "ogrsf_frmts.h"
  #include "cpl_multiproc.h"
  #include "ogrmutexedlayer.h"
  #include <map>
  
  /** OGRMutexedDataSource class protects all virtual methods of OGRDataSource
   *  with a mutex.
   *  If the passed mutex is NULL, then no locking will be done.
   *
   *  Note that the constructors and destructors are not explicitly protected
   *  by the mutex.
   */
  class CPL_DLL OGRMutexedDataSource : public OGRDataSource
  {
    protected:
      OGRDataSource *m_poBaseDataSource;
      int            m_bHasOwnership;
      CPLMutex      *m_hGlobalMutex;
      int            m_bWrapLayersInMutexedLayer;
      std::map<OGRLayer*, OGRMutexedLayer* > m_oMapLayers;
      std::map<OGRMutexedLayer*, OGRLayer* > m_oReverseMapLayers;
  
      OGRLayer*           WrapLayerIfNecessary(OGRLayer* poLayer);
  
    public:
  
      /* The construction of the object isn't protected by the mutex */
                   OGRMutexedDataSource(OGRDataSource* poBaseDataSource,
                                        int bTakeOwnership,
                                        CPLMutex* hMutexIn,
                                        int bWrapLayersInMutexedLayer);
  
      /* The destruction of the object isn't protected by the mutex */
      virtual     ~OGRMutexedDataSource();
  
      OGRDataSource*      GetBaseDataSource() { return m_poBaseDataSource; }
  
      virtual const char  *GetName();
  
      virtual int         GetLayerCount() ;
      virtual OGRLayer    *GetLayer(int);
      virtual OGRLayer    *GetLayerByName(const char *);
      virtual OGRErr      DeleteLayer(int);
  
      virtual int         TestCapability( const char * );
  
      virtual OGRLayer   *ICreateLayer( const char *pszName,
                                       OGRSpatialReference *poSpatialRef = NULL,
                                       OGRwkbGeometryType eGType = wkbUnknown,
                                       char ** papszOptions = NULL );
      virtual OGRLayer   *CopyLayer( OGRLayer *poSrcLayer,
                                     const char *pszNewName,
                                     char **papszOptions = NULL );
  
      virtual OGRStyleTable *GetStyleTable();
      virtual void        SetStyleTableDirectly( OGRStyleTable *poStyleTable );
  
      virtual void        SetStyleTable(OGRStyleTable *poStyleTable);
  
      virtual OGRLayer *  ExecuteSQL( const char *pszStatement,
                                      OGRGeometry *poSpatialFilter,
                                      const char *pszDialect );
      virtual void        ReleaseResultSet( OGRLayer * poResultsSet );
  
      virtual void        FlushCache();
  
      virtual OGRErr      StartTransaction(int bForce=FALSE);
      virtual OGRErr      CommitTransaction();
      virtual OGRErr      RollbackTransaction();
  
      virtual char      **GetMetadata( const char * pszDomain = "" );
      virtual CPLErr      SetMetadata( char ** papszMetadata,
                                       const char * pszDomain = "" );
      virtual const char *GetMetadataItem( const char * pszName,
                                           const char * pszDomain = "" );
      virtual CPLErr      SetMetadataItem( const char * pszName,
                                           const char * pszValue,
                                           const char * pszDomain = "" );
  };
  
  #endif // OGRMUTEXEDDATASOURCELAYER_H_INCLUDED
  