AnyEvent::Impl::EventLib - AnyEvent adaptor for Event::Lib
# this module gets loaded automatically as required
This module provides transparent support for AnyEvent. You don't have to do
anything to make Event work with AnyEvent except by loading Event::Lib before
creating the first AnyEvent watcher.
Note: the AnyEvent author has not found recent releases of Event::Lib to be even
remotely working (not even the examples from the manpage or the testsuite
work), so this event backend should be avoided (or somebody should step up and
maintain it, hint, hint).
The Event::Lib module suffers from the same limitations and bugs as libevent,
most notably it kills already-installed watchers on a file descriptor and it
is unable to support fork. These are not fatal issues, and are worked-around
by this module, but the Event::Lib perl module itself has many additional bugs
such as taking references to file handles and callbacks instead of making a
copy or freeing still-allocated scalars, causing memory corruption and random
crashes. Only Tk rivals it in its brokenness.
This adaptor module employs the same workaround around the watcher problems as
Tk and should therefore be avoided. (This was done for simplicity, one could
in theory work around the problems with lower overhead by managing our own
Event::Lib also leaks file handles and memory and tends to just exit on
It also doesn't work around the Windows bug of not signalling TCP connection
It also doesn't work with many special devices on Linux ( /dev/random
fails and so on).
Event::Lib does not support idle watchers. They could be emulated using
low-priority timers but as the priority range (and availability) is not
queryable nor guaranteed, and the default priority is likely the lowest one,
this module cannot use them.
Avoid Event::Lib if you can.
Marc Lehmann <firstname.lastname@example.org>