Hi All,
I'm using libevent 2.1.3-alpha-dev and was wondering how I could pass an
event to a callback function as part of another structure. In code I would
like the following:
struct my_struct {
struct event* evt;
struct foo* f;
int x
};
void event_callback(evutil_socket_t sock, short what, void *user_data) {
struct my_struct* data = (struct my_struct*)user_data;
another_function(what, data->evt);
}
Trouble is when I create and add the event the only option to pass the
event itself is using event_self_cbarg() as follows:
struct event* new_event;
new_event = event_new(base, fd, EV_WRITE, event_callback,
event_self_cbarg());
My question is would it be safe to create my_struct and pass it to
event_new and then fill in the evt member of my_struct later on by using
my_struct->evt = event_self_cbarg()?
The closest thing I could find for an answer was this:
http://archives.seul.org/libevent/users/Sep-2012/msg00041.html
but that's for a pre 2.1 release and not sure it's valid but it seems to
hint that passing pointer to pointer would work. I tried both methods
(assigning event_self_cbarg() to my_struct->evt and passing changing
my_struct so that evt member is defined as struct event** evt and assigning
my_struct->evt = &new_event.
Any direction/thoughts appreciated.
Best,
Timir
--
Timir Karia
[email protected]
