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R as 64 bit application

3 messages · Paul Gilbert, Thomas Lumley, Brian Ripley

Paul Gilbert
# 
In a package test I have a problem that needs over 4G of memory. This requires
that I use R compiled as a 64 bit application. Is there a way within R to test
if R has been compile as a 64 bit application? This would allow me to
automatically skip the test when I know it is going to fail.

Thanks,
Paul Gilbert
Thomas Lumley
#
On Thu, 15 May 2003, Paul Gilbert wrote:

            

      
      
      
    

        
I don't think so.  You could use a simple C function


  void is64bit (int *sizeptr){
	*sizeptr = sizeof sizeptr ==8;
	return;
	}


  is64bit<-function(){
	.C("is64bit",logical(1))[[1]]
	}


	-thomas

  
  


  


      

    

    

      
      

        


  

        

      Brian Ripley
    

    

      
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On Thu, 15 May 2003, Thomas Lumley wrote:

        

            

      
      
      
    

        
You could call object.size:

            

      
      
      
    

        
[1] 28

            

      
      
      
    

        
[1] 56

or you could look at the results of gc():

            

      
      
      
    

        
[1] 56.05374

and it's about 28 on a 32-bit system.