[Click] read handler with parameters

[Eddie Kohler]

If you want your read handler to take parameters, you need to use 
set_handler() and supply Handler::OP_READ | Handler::READ_PARAM.

http://www.read.cs.ucla.edu/click/doxygen/classElement.html#4b0cd1711fb51b8aba0f2e01f3eba9c0

Eddie


sam barker wrote:
> Hi Beyers,
> I tried it but got the error "read handlers does not take parameters".
> 
> Is there anyway way to call the read handler with parameters.[Suppose if you
> want to return  a value  corresponding to the passed parameter]
> 
> I was going through a manual called coding concepts which clearly states
> that "You can't call a ReadHandler with arguments"
> 
> 
> Cheers,
> Sam
> On Jan 15, 2008 9:01 PM, Beyers Cronje <bcronje at gmail.com> wrote:
> 
>> Hi Sam,
>>
>> I've never passed a parameter to a read handler before, so this might be
>> wrong....
>>
>> Your telnet command should be:
>>
>> read readelement_name.a_handle 1
>>
>> Also I believe the prototype of add_handlers is onle 'virtual void
>> add_handlers();'
>>
>> Beyers
>>
>> On Jan 15, 2008 4:11 AM, sam barker <sam.barker0 at gmail.com> wrote:
>>
>>> Hi All,
>>> I was trying out the read handler with a parameter and I seem to be
>>> stuck.
>>>
>>> Basically I wan t to  pass an int parameter to my_func().
>>>
>>> After I telnet into the localhost how do I call the function?.
>>> I had used  read readelement_name.a_handle(1);
>>>
>>> The the partial code of my .cc file is below
>>>
>>>
>>> String readelement::handle(Element *e, void *thunk){
>>>    readelement * me = (readelement *) e;
>>>
>>>    int *i;
>>>    i=(int *)thunk;
>>>    return me->my_func(i);
>>> }
>>> void readelement::add_handlers(void * thunk){
>>>    add_read_handler("a_handle", &handle, (void *)thunk);
>>> }
>>>
>>> Regards,
>>> Sam
>>> _______________________________________________
>>> click mailing list
>>> click at amsterdam.lcs.mit.edu
>>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>>>
>>
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