Re: How to inject code at the top and bottom of each method generated in cpp wrap file by SWIG?

Hi Jim,

Thanks for the solution. The typemap(ret) works perfectly for injecting the
code at the end. But using typemap(check) does not include the declaration
of the result variable. The c++ default constructor for result needs to be
inside the injected mutex code. I tried using the optimal flag in
typemap(out) but exception handling code overrides that behavior.

Is there a way to tell swig that declaration of the result variable should
be after the typemap(check)?

Once again thanks for the solution above.

On Mon, Apr 24, 2023 at 8:30 PM Jim <[email protected]> wrote:

>
> Hi Prajjwal,
>  You can try this :
>
> %typemap(ret) SWIGTYPE {
>  //inject-1
> }
>
> %typemap(ret) SWIGTYPE & {
>  //inject-2
> }
>
> %typemap(ret) SWIGTYPE * {
>  //inject-3
> }
>
> %typemap(check) SWIGTYPE * {
>   //inject-4
> }
>
> %typemap(check) SWIGTYPE  {
>   //inject-5
> }
>
> Note: keyword *SWIGTYPE* math any type(eg int\long\bool\T)。*SWIGTYPE &*
> match any reference type (eg. int & \ long & \ bool& \ T＆)。 You can add
> different typemap according to your function type as needed。
>
>
>
>
> At 2023-04-25 05:27:05, "prajjwal prem" <[email protected]> wrote:
>
> Hi All,
>
> How to inject code at the top and bottom of each method generated in cpp
> wrap file by SWIG?
>
> For Example:
>
> SWIGEXPORT int SWIGSTDCALL CSharp_swig_generated_method___(void *jarg1)
>
>   {
>
>     int jresult;    //SWIG generated
>
>
>
>     *// inject code here like mutex begin*
>
>
>
>     /*
>
>         SWIG generated code
>
>     */
>
>
>
>     jresult = result;
>
>
>
>     *// inject code here like mutex end*
>
>
>
>     return jresult;
>
>   }
>
>
> Best regards,
>
> Prajjwal
>
>

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