I can't believe it was that simple. Thank you so much!
On Monday, July 28, 2014 10:16:21 PM UTC-7, Ivar Nesje wrote:
>
> It seems to me like the error is that you don't have a Julia method
> results = gillespie (rr, 0)
> that takes an Int as the second argument. the method you define only takes
> a Float64, so you should probably call it with a Float64 as well.
> results = gillespie (rr, 0.)
>
> Also I would think that RRHandle would be pointer sized, so you should
> use Ptr{Void} instead of Uint for its type.
>
> Regards Ivar
>
> kl. 03:24:36 UTC+2 tirsdag 29. juli 2014 skrev Alexander Darling følgende:
>>
>> Hello,
>>
>> I am in the process of making Julia functions that use functions in
>> C-exported libraries using "ccall". One of the functions I am writing
>> throws errors when I try to include a double in the call. I think this is
>> because I'm using the wrong type instead of double (Float64) but I don't
>> know what the correct type is and I'm not 100% sure that's the problem.
>>
>> This is the function in C:
>> C_DECL_SPEC RRDataHandle rrcCallConv gillespie(RRHandle handle, double
>> startTime) {
>> // Things happen here
>> return (RRDataHandle) r->getSimulationResult();
>> }
>>
>>
>> Here is my test code.
>> rrlib = dlopen("...\\roadrunner_c_api.dll") // the library that the
>> "gillespie" function is from
>>
>> function gillespie(rr, startTime::Float64)
>> return ccall (dlsym (rrlib,:gillespie),cdecl, Uint,(Uint, Float64),rr,
>> startTime)
>> end
>>
>> //The object "rr" is set up here
>> results = gillespie (rr, 0)
>>
>> And this is the error that gets thrown. For context, The "gillespie"
>> function is called on line 106 and the "rr" object's memory address is
>> @0x23dc4c08.:
>> LoadError(".../myTest.jl", 106, MethodError(gillespie, (Ptr{Void} @
>> 0x23dc4c08,0)))
>>
>> When I modify the function in C and the middleman function in Julia so
>> that both only takes the "rr" argument and not "startTime", it works fine.
>> In addition, the function works just fine in C with two arguments. I
>> suspect it's because the "startTime" in Julia is a Float64, and C requires
>> a double. However changing the "startTime" argument in the C function into
>> a float just gives me the same error.
>>
>
