On Thu, May 14, 2009 at 9:49 PM, Lisandro Dalcin <[email protected]> wrote:
> Could you tell me the EXACT type definition for "iovec" in your C header file?
>
I defined it like this:
ctypedef struct iovec:
void *iov_base
size_t iov_len
> ---
>
> On Thu, May 14, 2009 at 9:43 PM, Mohamed Lrhazi <[email protected]> wrote:
>> Hello,
>>
>> I have a C -lib function requring a params in this form: struct
>> iovec *hdr_names[]
>> When I declare the above function, as from external .h file, I use the
>> same syntax, minus the word strurct: iovec *hdr_names[]
>>
>> Now to create this data, I do this:
>>
>> cdef iovec *hdr_names=NULL
>> hdr_names=<iovec*>malloc(total_count * sizeof(iovec))
>>
>> then go some loops and checks, filling the iovecs like this:
>>
>> hdr_names[ii].iov_base = <char*>hdr_n
>> hdr_names[ii].iov_len = len(hdr_n)
>>
>>
>> then dump eveything just to be sure, like this:
>>
>> for ii in range(total_count):
>> print "hdr_names[%d] : "%ii,
>> PyString_FromStringAndSize(<char*>hdr_names[ii].iov_base,
>> hdr_names[ii].iov_len)
>> print "hdr_values[%d]: "%ii,
>> PyString_FromStringAndSize(<char*>hdr_values[ii].iov_base,
>> hdr_values[ii].iov_len)
>>
>> then pass it to the C function like this: modify(hdr_names)
>>
>> That fails to compile: Cannot assign type 'iovec *' to 'iovec **'
>> So I try: &hdr_names
>>
>> This compiles, but causes my program to crash with sigfault, right at
>> that function call.
>>
>> I tried various other ideas.... but what is the correct way
>> anyways.... I might have other issues causing the sigfaults, but
>> wanted to be sure about the very syntax..
>>
>> Thanks a lot,
>> Mohamed.
>> _______________________________________________
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>>
>
>
>
> --
> Lisandro Dalcín
> ---------------
> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
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