Protect postgis crs cache with mutex

m-kuhn · m-kuhn · commit 0854e795d97f · 2017-08-05T11:27:59.000+02:00
diff --git a/src/providers/postgres/qgspostgresprovider.cpp b/src/providers/postgres/qgspostgresprovider.cpp
@@ -3950,6 +3950,8 @@ QgsCoordinateReferenceSystem QgsPostgresProvider::crs() const
   srs.createFromSrid( srid );
   if ( !srs.isValid() )
   {
+    static QMutex sMutex;
+    QMutexLocker locker( &sMutex );
     static QMap<int, QgsCoordinateReferenceSystem> sCrsCache;
     if ( sCrsCache.contains( srid ) )
       srs = sCrsCache.value( srid );

Original file line number	Diff line number	Diff line change
`@@ -3950,6 +3950,8 @@ QgsCoordinateReferenceSystem QgsPostgresProvider::crs() const`
`3950`	`3950`	`srs.createFromSrid( srid );`
`3951`	`3951`	`if ( !srs.isValid() )`
`3952`	`3952`	`{`
	`3953`	`+ static QMutex sMutex;`
	`3954`	`+ QMutexLocker locker( &sMutex );`
`3953`	`3955`	`static QMap<int, QgsCoordinateReferenceSystem> sCrsCache;`
`3954`	`3956`	`if ( sCrsCache.contains( srid ) )`
`3955`	`3957`	`srs = sCrsCache.value( srid );`