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README  view on Meta::CPAN

    AnyEvent has the central concept of a *watcher*, which is an object that
    stores relevant data for each kind of event you are waiting for, such as
    the callback to call, the file handle to watch, etc.

    These watchers are normal Perl objects with normal Perl lifetime. After
    creating a watcher it will immediately "watch" for events and invoke the
    callback when the event occurs (of course, only when the event model is
    in control).

    Note that callbacks must not permanently change global variables
    potentially in use by the event loop (such as $_ or $[) and that
    callbacks must not "die". The former is good programming practice in
    Perl and the latter stems from the fact that exception handling differs
    widely between event loops.

    To disable a watcher you have to destroy it (e.g. by setting the
    variable you store it in to "undef" or otherwise deleting all references
    to it).

    All watchers are created by calling a method on the "AnyEvent" class.

lib/AnyEvent.pm  view on Meta::CPAN

AnyEvent has the central concept of a I<watcher>, which is an object that
stores relevant data for each kind of event you are waiting for, such as
the callback to call, the file handle to watch, etc.

These watchers are normal Perl objects with normal Perl lifetime. After
creating a watcher it will immediately "watch" for events and invoke the
callback when the event occurs (of course, only when the event model
is in control).

Note that B<callbacks must not permanently change global variables>
potentially in use by the event loop (such as C<$_> or C<$[>) and that B<<
callbacks must not C<die> >>. The former is good programming practice in
Perl and the latter stems from the fact that exception handling differs
widely between event loops.

To disable a watcher you have to destroy it (e.g. by setting the
variable you store it in to C<undef> or otherwise deleting all references
to it).

All watchers are created by calling a method on the C<AnyEvent> class.