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  • anineOctober 25, 2008 8:41 PM PDT   
    VC++ language CLR windows form with TBB? (error C2695)

    I meet a question. When I write a TBB program in console mode. It is running normally.But when I write a TBB program in clr windows form(this program is the same code under clr windows form and console mode). The compiler appear in the wrong information(error C2695).

     " Program FilesIntelTBB2.1includetbbparallel_for.h(59) : error C2695
     function1' overriding virtual function differs from 'function2' only by calling convention".
     Where function1 is 'start_for<Range,Body,Partitioner>::note_affinity' and  function2  is 'tbb::task::note_affinity'.

    This problem confuse me. Does any reason cause this question? How should I solve it?

                                                                                                                               Thank you



    Andrey Marochko (Intel)October 27, 2008 9:08 AM PDT
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    		 #1
    Re: VC++ language CLR windows form with TBB? (error C2695)

    I'm not completely sure that this will help, but for the sake of experiment try to do the following:

    • Open file "tbb/parallel_for.h"
    • Find the line:
      /*override*/ void note_affinity( affinity_id id ) {
    • Change it to
      /*override*/ void __TBB_EXPORTED_METHOD note_affinity( affinity_id id ) {
    • Save the changed file
    • Rebuild your application

    And, please, write us if it helped or not.

     



    anineOctober 27, 2008 8:12 PM PDT
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    		 #2 Reply To #1
    Re: VC++ language CLR windows form with TBB? (error C2695)
    Thanks for your answer. I followed your method to change codes in tbb/parallel_for.h. There is still a mistake(C3641). This mistake is a question about  '/clr:pure' and 'calling_convention'.
    I only hope to change the following procedure from CLR console mode into CLR window form.
    I am so unexpected that the problem is happen.
    Maybe I have not noticed some details of CLR windows form.
    class Average{
     float* input;
     float* output;
     size_t size;
     public:
      void operator () (const blocked_range<size_t> & r) const {
       for(size_t i = r.begin(); i != r.end(); i++){
        if(i == 0)
         output[i] = (input[i] + input[i] + input[i+1])/3;
        else if(i == (size-1))
         output[i] = (input[i-1] + input[i] + input[i])/3;
        else
         output[i] = (input[i-1] + input[i] + input[i+1])/3;
        
       }
      } // end operator()
         Average(float _i[], size_t _s, float _o[]) : input(_i), size(_s), output(_o) {} //constructor + initial setup
     };

     



    Andrey Marochko (Intel)October 30, 2008 6:59 AM PDT
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    		 #3 Reply To #2
    Re: VC++ language CLR windows form with TBB? (error C2695)

    OK, I see what was the reason of your problem. You attempt to compile your .Net app in the "/clr:pure" mode. This won't work with the native library like TBB. Use the simple "/clr" option to compile your project. (And do not forget to remove that __TBB_EXPORTED_METOD qualifier from the "parallel_for.h" you've added recently.)



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