I think the problem still lies with your declaration of the integer field. c_long in D is supposed to be equivalent to the long type in C, *not* long long. It is declared as 32 bits on a 32-bit system and 64 bits on a 64-bit system. I believe that in practice, most C compilers implement long long as 64 bits on both 32- and 64-bit systems. I recommend you use long on the D side, rather than c_long. And, actually, it would be best to compile a test with the same C compiler used to compile redis to verify the size of long long.
I changed c_long to long and it actually works !!! Thanks very much. Now I'm wondering should I use `long` or do some static check for the type just like what c_long does for C' long type? I'm only using 32bit Ubuntu, so not able to check this on other systems. Wonder whether there is a c_long_long type.
In http://dlang.org/interfaceToC.html it says in 32bit system c_long is equivalent to `long long` in C. Is this wrong?
