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Hi Sajjadul,
On 13/10/2013 1:12, Sajjadul Islam wrote:
> Thanks for the suggestion of the singleton design . I tried to design a
> template base
> class as follows :
>
> Code: ... template<class T> class Singleton { public: /** * Init the actual
> singleton. * Must be called BEFORE the class is used, like this: */ static
> void
> init() { assert( singletonClass_.get() == NULL); singletonClass_ = new T; }
>
>
> /** * Get Pointer of the actual class * @return Pointer of the actual class
> */ static
> T* getPtr() { assert( singletonClass_.get() != NULL); return
> singletonClass_.release(); } ... But it crashes at the assertion. I tried
> without
> assertion , then debugger simply exits at the point where i call: ...
> osgOpenCL::Context *cxt = osgOpenCL::Singleton<osgOpenCL::Context>::getPtr();
Did you call 'init' on the singleton class before this?
Also, the 'getPtr' is buggy, since it calls 'release' on the singleton object.
This
will work the first time round, but delete the object afterwards and will crash
on
subsequent calls.
Cheers,
/ulrich
- --
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