[pypy-dev] Cannot instantiate ctype 'struct *' of unknown size

[Amaury Forgeot d'Arc]

2015-05-20 11:44 GMT+02:00 Yicong Huang <hengha.mao at gmail.com>:

> Hi,
>
> The below is the code we met troubles;
>
> ffi.cdef('''
>   struct API {
>      struct api_ret* (*pyudf)(char* str);
>   };
> ''')
>
> ffi.cdef('''
>   struct api_ret {
>      char *ret1;
>      char *ret2;
>      char *ret3;
>   };
> ''')
>
> result = ffi.new('struct api_ret*')
>

This code works for me. What's the issue exactly?


>
> At first, we defined struct API with a function pointer that return a
> pointer to struct api_ret.
> And then we defined api_ret, and tried to new the object.
> The problem seems to happen when the function pointer and new structure
> are together.
> The below code had no problems.
>
> ffi.cdef('''
>   struct API {
>      struct api_ret* (*pyudf)(char* str);
>   };
> ''')
>
> ffi.cdef('''
>   struct api_ret2 {
>      char *ret1;
>      char *ret2;
>      char *ret3;
>   };
> ''')
> #we used different name api_ret2 to work around the issue.
> result = ffi.new('struct api_ret2*')
>
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>


-- 
Amaury Forgeot d'Arc
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