Hi Ismail, Not sure to understand all you explained, I didn't find a simple answer to my questions. I know that the getProcAdress return a void*, but I was asking about the osg getProcAdress, and if is there any way different than the cast to get the function usable ... and to know how this is used in the plugins because I didn't found any code using it.
Thanks. Regards, Vincent. 2009/5/13 Ismail Pazarbasi <[email protected]> > On Wed, May 13, 2009 at 9:47 AM, Vincent Bourdier > <[email protected]> wrote: > > Hi all, > > > > I'm currently making a dynamic lib for my application, and so I use the > > osgDB::DynamicLibrary class to load the lib and find the Proc_adress but, > > there are some points I would like to understand more : > > > > 1. > > The osgDB::DynamicLibrary::PROC_ADDRESS is just a void* so to use the > adress > > as a function as expected, I need to cast it : > > > > > > typedef int (*Pupdate) (const char* path, const char* id, > bool > > first_time); > > Pupdate update; > > update = (Pupdate) dll->getProcAddress("update"); > > > > If I do not cast, the compiler do not want to use a void* when I call the > > function next... > > > > It is the behavior/use you were expecting when writing this class ? or is > > there someting else to use, avoiding the cast ... > > A little precision : this code have to work on every osg supported > > plateform. (win and linux at least) > > > > > > 2. > > Next, I just have red a lot of code on osgDB, writers, plugins ... etc > but I > > didn't found the rela "connection" between the osgDB core and the > plugins. > > > > What I've understood is : > > The core, using the file termination, load the DLL (if exists). > > But the getProcAdress is never used ... so how did the core call the dll > > read/write function without the ProcAdress ? > > > > > > Any help would a very apreciated :-) > > > > Thanks. > > > > Regards, > > Vincent. > > > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > > Hi Vincent, > > void* is accepted form of an address in memory. getProcAddress returns > address of a symbol in the dynamic library and it (the underlying > implementation) doesn't care how exported symbol looks like (i.e. > types), nor knows what will that address be used for. There may be > implementations around (IIRC, with boost::function and boost::bind) > but it may be too complicated and doesn't simplify your job anyway. > > Ismail > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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