TSK objects created dynamically

Hi,everyone
I want to create my task dynamically after taskA,and i wrote those code in
taskA:
 ��    
    TSK_Attrs attrs;
    tskVideoInputInit();//video initial function
    tskVideoInputStart(); //video start function 
    // create video task
    attrs = TSK_ATTRS;
    attrs.priority = 3;
    attrs.stacksize = 16384; 
    attrs.name = "tskVideoInput";//task name
    TSK_create((Fxn)"_tskVideoInput", &attrs);//create task
��
but i found this video input task didn't work! could someone help me about
this? By the way, my other settings is absolutely right.

> Hi,everyone
> I want to create my task dynamically after taskA,and i wrote those code in
> taskA:
>  ......
>     TSK_Attrs attrs;
>     tskVideoInputInit();//video initial function
>     tskVideoInputStart(); //video start function
>     // create video task
>     attrs = TSK_ATTRS;
>     attrs.priority = 3;
>     attrs.stacksize = 16384;
>     attrs.name = "tskVideoInput";//task name
>     TSK_create((Fxn)"_tskVideoInput", &attrs);//create task

It looks like you want your task to call a function with prototype
void tskVideoInput(void);

A) You shouldn't have the quotes around the function name in the
TSK_create call.

B) You don't need to explicity put the underscore in front of the
function name.

C) If this is C++ code (not C code) you need to extern "C" your
function, otherwise you need to call the TSK_create funtion with C++
mangled name (do a google search for C++ name mangling if you don't
know what this is).

So you probably want to do something like:

extern "C" void tskVideoInput(void);
...
TSK_create((Fxn)tskVideoInput,&attrs,NULL);

> ......
> but i found this video input task didn't work! could someone help me about
> this? By the way, my other settings is absolutely right.

> C) If this is C++ code (not C code) you need to extern "C" your
> function, otherwise you need to call the TSK_create funtion with C++
> mangled name (do a google search for C++ name mangling if you don't
> know what this is).

Actually, this part isn't required if you're dynamically creating
tasks.  Its only required if you want to statically create tasks from
the DSP/BIOS .cdb file, or if you ever want to call that function from
some other C (not C++) context.