HI Hartwing, Which version of the OSG are you testing under?
Robert. On 17 December 2017 at 23:46, Hartwig Wiesmann <[email protected]> wrote: > Hi, > > I am using PagedLOD together with a pseudo-loader to load files via the > network. To load the files the ReaderWriterCURL class is used. > > The database pager is set up with one general and one HTTP thread. This means > that the ReaderWriterCURL::readFile(ObjectType, const std::string&, const > osgDB::ReaderWriter::Options*) (and WriteFile) method is always called from > the same thread! > > In ReaderWriterCURL::readFile the class method getEasyCurl() is used to get a > reference to an EasyCurl object. And always the same EasyURL object is > returned because it is always the same thread that is calling getEasyCurl(). > > The problem is (seems to be) that although the ReaderWriterCURL::readFile is > used by the same thread it can happen that different instances of > ReaderWriterCURL::readFile are running in parallel (verified by debug > output). But this means that these instances use the SAME EasyCURL object! > And this will lead to a crash. > > For testing purposes I replaced the call to getEasyCurl in > ReaderWriterCURL::readFile with osg::ref_ptr<EasyCurl> easyCurl and did the > corresponding replacements ("." replaced by "->") and everything went > smoothly. > > I do not know the purpose of getEasyCur() using a map of EasyCurl objects as > this method is only used in ReaderWriterCURL::readFile and writeFile. The > only thing that has to be prevented is that curl_easy_init() is called in > parallel. But this can also be achieved by returning an > osg::ref_ptr<EasyCurl> object in combination with a lock. > > Awaiting your comments! > > Cheers, > Hartwig > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=72591#72591 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
