The watcher might or may not be Lively even though it really is pending (one example is, an expired non-repeating timer can be pending but no more active). If it is
not introduce any overhead in libev. Several (busy) packages can generally gain by location the I/O obtain interval to a price near 0.one or so, which can be usually sufficient for interactive
system is suspended for an extremely while, and monotonic clock sources are in use, Then you can certainly be expecting "ev_timer"s to expire as the full suspension
override it easily by setting up your own personal handler for "SIGCHLD" immediately after initialising the default loop, and ensuring that the default loop under no circumstances gets
Then use an "ev_timer" to fire if the timeout at the start of your checklist is anticipated to fireside (as an example, using the system #3). When You can find some exercise, get rid of the timer from the listing, recalculate the timeout, append it to the tip on the list once more, and make sure to update the
try its best to provide signals synchronously, i.e. as part of the traditional occasion processing, like another occasion. If you would like alerts for being delivered definitely asynchronously, just use "sigaction" as you'd probably do without the need of libev and ignore sharing the signal.
path for as long as the watcher is Energetic. The callback will get an "EV_STAT" celebration more info every time a transform was detected, relative to your characteristics at enough time the watcher was started off (or maybe the
"ev_timer" if it was taken from the start from the checklist. Using this method, you can handle a limiteless amount of timeouts in O(one) time for setting up, halting and updating the timers, for the expenditure of A significant
and triggering an "ev_async" watcher from the default loop watcher callback into the party loop interested in the sign.
libev phone calls website them utilizing an "ev_watcher *" internally. pointer accesses needs to be thread-atomic Accessing a pointer worth has to be atomic, it will have to the two check here be readable and writable in a single piece - this is the scenario on all present-day architectures.
after per this interval, on regular. Similarly, by placing a è²å¾‹è³“éŠå¸ä»£è¾¦ higher timeout acquire interval you allow for libev to spend far more time collecting timeouts, on the here expenditure of improved
This may be applied to make quite elaborate timers, such as a timer that triggers on "following midnight, area time". To achieve this, you'd compute the subsequent
The Distinctive issue of stat time resolution The "stat ()" technique call only supports total-2nd resolution portably, and perhaps on programs where by the resolution is higher, most file techniques
8 - entire API This enables a great deal of the "lesser used" API features. See "ev.h" for aspects on which areas of the API remain
