libev is modelled after libevent (http://monkey.org/~provos/libevent/), but aims
to be faster and more correct, and also more featureful. Examples:
-- multiple watchers can wait for the same event without deregistering others.
+(comparisons relative to libevent-1.3e and libev-0.00)
+
+- multiple watchers can wait for the same event without deregistering others,
+ both for file descriptors as well as signals.
(registering two read events on fd 10 and unregistering one will not
break the other)
- fork() is supported and can be handled
(there is no way to recover from a fork when libevent is active)
-- timers are handled as a priority queue
- (libevent uses a less efficient red-black tree)
+- timers are handled as a priority queue (important operations are O(1))
+ (libevent uses a much less efficient but more complex red-black tree)
- supports absolute (wallclock-based) timers in addition to relative ones,
i.e. can schedule timers to occur after n seconds, or at a specific time.
- simpler design, backends are potentially much simpler
(in libevent, backends have to deal with watchers, thus the problems)
- (epoll backend in libevent: 366 lines, libev: 89 lines, and more features)
+ (epoll backend in libevent: 366 lines, libev: 90 lines, and more features)
+
+- libev handles EBADF gracefully by removing the offending fds.
whats missing?
- evdns, evhttp, bufferevent are missing, libev is only an even library at
the moment.
-- no priority support at the moment.
+- no priority support at the moment
+
+- kqueue, poll (libev currently implements epoll and select)
-- kqueue, poll (libev currently implements epoll and select).
+- windows support (whats windows?)
projects / software / libev.git / blobdiff