On Wed, Jun 19, 2013 at 8:19 AM, liu lily <politoeso...@gmail.com> wrote:
> > I have some questions on libevent event priority > > 1 what is the priority number range? > That's a property of the event_base, and is configured by event_base_priority_init() when you're constructing the event_base. > 2 in the mannual, it says By default, libevent assigns the middle > priority to all events unless their priority is explicitly set. so what > is the exact default priority number? > It's the maximum priority value plus one, divided by 2. > 3 when priority is higher, the number is smaller or larger? > Numerically lower priority values are more high-priority. > 4 There are two functions which are related to event priority in libevent. > event_priority_init() and event_priority_set, what are the differences > between them? > event_base_priority_init() sets up priorities in an event_base. event_priority_set() changes the priority of an event. event_priority_init() is deprecated. > 5 what are return values for event_priority_set(struct event *ev, int > pri)? I notice an article says something like: when an event is ready, it > can't be set and calling of this function returns -1. I really don't > understand what does this mean? can anyone explain a bit? thanks! > I don't know what article you're talking about. Try looking at the reference manual at http://www.wangafu.net/~nickm/libevent-book/ and at the documentation in the header files.
