hi,maybe you call event_new without the flag of EV_PERSISTENT,so when cb_func is triggered ,the event is automatic deleted by event_base_loop,it's seems there is two ev_del calls in   your example ,

forgive my pool english..

2011/4/7 Michał Król <mharnen <at> gmail.com>

Hi,

I was wondering if there is any way I can access event object within callback function in libevent2? I know I can put it in global variable, but I'll have a lot of events and I want to access particular one, so I want to avoid it.

I cannot pass it as an argument because I'll have pointer to event structure after setting callback in evet_new.

To be precise I want to do something like this:


int main(){
     event = event_new(base, socket, flags, cb_func, args);

     event_add(event);
}

void cb_func(args){

     //do some work

     event_del(event);  <-- the problem is with getting event structure which invoked this callback }


Thanks in advance

Michal

hi,you could do like this:

set event type without EV_PERSISTENT 

void cb_func(int fd,short types,void* arg)

{

    //do some work

  if (cond==false)

  {

   event_add(event);//will be triggered again.

  }

}

2011/4/7 Michał Król <mharnen <at> gmail.com>

Hi!

Thanks for your response. Unfortunately I want to invoke this event more then once, and stop invoking after particular condition occurs, so it's more like:

void cb_func(agrs){

    //do some work
     if(cond)
         event_del(event);

   
}

2011/4/7 蒋浩 <jaxecn <at> gmail.com>

hi,maybe you call event_new without the flag of EV_PERSISTENT,so when cb_func is triggered ,the event is automatic deleted by event_base_loop,it's seems there is two ev_del calls in   your example ,

forgive my pool english..

2011/4/7 Michał Król <mharnen <at> gmail.com>

Hi,

I was wondering if there is any way I can access event object within callback function in libevent2? I know I can put it in global variable, but I'll have a lot of events and I want to access particular one, so I want to avoid it.

I cannot pass it as an argument because I'll have pointer to event structure after setting callback in evet_new.

To be precise I want to do something like this:


int main(){
     event = event_new(base, socket, flags, cb_func, args);

     event_add(event);
}

void cb_func(args){

     //do some work

     event_del(event);  <-- the problem is with getting event structure which invoked this callback }


Thanks in advance

Michal

sorry ,i read your question again .

may be we could do this:

event* ev = event_new(0, -1,0, 0,0);

event_set(ev,base, socket, flags, cb_func, ev);

then you could pass the event as argument .

2011/4/7 Michał Król <mharnen <at> gmail.com>

Hi,

I was wondering if there is any way I can access event object within callback function in libevent2? I know I can put it in global variable, but I'll have a lot of events and I want to access particular one, so I want to avoid it.

I cannot pass it as an argument because I'll have pointer to event structure after setting callback in evet_new.

To be precise I want to do something like this:


int main(){
     event = event_new(base, socket, flags, cb_func, args);

     event_add(event);
}

void cb_func(args){

     //do some work

     event_del(event);  <-- the problem is with getting event structure which invoked this callback }


Thanks in advance

Michal