ssGetPWork doesnt work in callbacks mdlInitializeSizes and mdlInitializeSampleTimes

2011 2 16
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8 次查看（30 天）

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Hello to everyone,
can somebody tell me why in sfunctions I can not store an object in the callbacks mdlInitializeSizes and mdlInitializeSampleTimes? It works in all the other callback.
the code looks like this
static void mdlInitializeSizes(SimStruct *S)
{
ssSetNumPWork(S, 1); // or ssSetNumPWork(S, DYNAMICALLY_SIZED);
.....
ssGetPWork(S)[0] = (void *) new MyClass;
}
Thank you!
G.

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回答（1 个）

Kaustubha Govind
Kaustubha Govind 2011-2-16

0 个投票

I don't believe that work vectors are even allocated until after mdlSetWorkWidths - mdlInitializeSizes and mdlInitializeSampleTimes are in the initialization stage of the S-function where attributes of work vectors can be set (like the number of work vectors, their widths, etc.) which can later be used for allocation.
Is there a reason you'd like to initialize your work vectors so early?

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Giulio
Giulio 2011-2-16
Thanks for your replay.
In my s-function the initialization depends on the parameters in input. In particular the parameters are manipulated by a method of a class. I would be nice instantiate an object of the class and store it once since I will use it in the other callbacks.
Kaustubha Govind
Kaustubha Govind 2011-2-17
In that case, ssSetUserData and ssGetUserData might be more appropriate.

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Giulio
Giulio
2011-2-16

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