Hello Georg,
Georg Stevenson wrote:
> One of them is following code snippet which occurs in some of the
> multithreading relevant classes:
>
> TransformationPipeMT.h:
> ...
> OSG::Lock* pipeLock;
> ...
>
> TransformationPipeMT.cpp:
> ...
> #ifdef OPENSG_18
> pipeLock = dynamic_cast<OSG::Lock*>
> (OSG::ThreadManager::the()->getLock(lockName.c_str()));
> #else
> #ifdef OPENSG_20
> //TODO
> #endif
> ..
>
> First: i can't find a way to use the given LockTransitPtr (from getLock
> ) as Lock*.
the threading/synchronization objects are now correctly ref counted as
well, so you need to hold them with e.g. OSG::LockRefPtr. The
*TransitPtr types exist solely to prevent you from getting a raw C ptr
because then the TransitPtr d'tor would decrement the objects ref count
and your raw C ptr would point to a deleted object.
The above needs to become:
TransformationPipeMT.h:
OSG::LockRefPtr pipeLock;
TransformationPipeMT.cpp:
pipeLock = OSG::dynamic_pointer_cast<OSG::Lock>(
OSG::ThreadManager::the()->getLock(lockname.c_str(), false));
> Second: getLock takes Argument bGlobal (true||false) which i can't find
> documentation for.
It indicates whether the object is held in a global variable (one that
is only destroyed after osgExit has already run), because for those the
ThreadManager behaves slightly differently when it shuts down.
Cheers,
Carsten
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