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Comparing libev/ev.pod (file contents):
Revision 1.268 by root, Sat Aug 29 08:15:11 2009 UTC vs.
Revision 1.272 by root, Tue Nov 24 06:39:28 2009 UTC

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370When this flag is specified, then libev will not attempt to use the 370When this flag is specified, then libev will not attempt to use the
371I<inotify> API for it's C<ev_stat> watchers. Apart from debugging and 371I<inotify> API for it's C<ev_stat> watchers. Apart from debugging and
372testing, this flag can be useful to conserve inotify file descriptors, as 372testing, this flag can be useful to conserve inotify file descriptors, as
373otherwise each loop using C<ev_stat> watchers consumes one inotify handle. 373otherwise each loop using C<ev_stat> watchers consumes one inotify handle.
374 374
375=item C<EVFLAG_NOSIGNALFD> 375=item C<EVFLAG_NOSIGFD>
376 376
377When this flag is specified, then libev will not attempt to use the 377When this flag is specified, then libev will not attempt to use the
378I<signalfd> API for it's C<ev_signal> (and C<ev_child>) watchers. This is 378I<signalfd> API for it's C<ev_signal> (and C<ev_child>) watchers. This is
379probably only useful to work around any bugs in libev. Consequently, this 379probably only useful to work around any bugs in libev. Consequently, this
380flag might go away once the signalfd functionality is considered stable, 380flag might go away once the signalfd functionality is considered stable,
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410 410
411This backend maps C<EV_READ> to C<POLLIN | POLLERR | POLLHUP>, and 411This backend maps C<EV_READ> to C<POLLIN | POLLERR | POLLHUP>, and
412C<EV_WRITE> to C<POLLOUT | POLLERR | POLLHUP>. 412C<EV_WRITE> to C<POLLOUT | POLLERR | POLLHUP>.
413 413
414=item C<EVBACKEND_EPOLL> (value 4, Linux) 414=item C<EVBACKEND_EPOLL> (value 4, Linux)
415
416Use the linux-specific epoll(7) interface (for both pre- and post-2.6.9
417kernels).
415 418
416For few fds, this backend is a bit little slower than poll and select, 419For few fds, this backend is a bit little slower than poll and select,
417but it scales phenomenally better. While poll and select usually scale 420but it scales phenomenally better. While poll and select usually scale
418like O(total_fds) where n is the total number of fds (or the highest fd), 421like O(total_fds) where n is the total number of fds (or the highest fd),
419epoll scales either O(1) or O(active_fds). 422epoll scales either O(1) or O(active_fds).
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590as signal and child watchers) would need to be stopped manually. 593as signal and child watchers) would need to be stopped manually.
591 594
592In general it is not advisable to call this function except in the 595In general it is not advisable to call this function except in the
593rare occasion where you really need to free e.g. the signal handling 596rare occasion where you really need to free e.g. the signal handling
594pipe fds. If you need dynamically allocated loops it is better to use 597pipe fds. If you need dynamically allocated loops it is better to use
595C<ev_loop_new> and C<ev_loop_destroy>). 598C<ev_loop_new> and C<ev_loop_destroy>.
596 599
597=item ev_loop_destroy (loop) 600=item ev_loop_destroy (loop)
598 601
599Like C<ev_default_destroy>, but destroys an event loop created by an 602Like C<ev_default_destroy>, but destroys an event loop created by an
600earlier call to C<ev_loop_new>. 603earlier call to C<ev_loop_new>.
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2136to install a fork handler with C<pthread_atfork> that resets it. That will 2139to install a fork handler with C<pthread_atfork> that resets it. That will
2137catch fork calls done by libraries (such as the libc) as well. 2140catch fork calls done by libraries (such as the libc) as well.
2138 2141
2139In current versions of libev, you can also ensure that the signal mask is 2142In current versions of libev, you can also ensure that the signal mask is
2140not blocking any signals (except temporarily, so thread users watch out) 2143not blocking any signals (except temporarily, so thread users watch out)
2141by specifying the C<EVFLAG_NOSIGNALFD> when creating the event loop. This 2144by specifying the C<EVFLAG_NOSIGFD> when creating the event loop. This
2142is not guaranteed for future versions, however. 2145is not guaranteed for future versions, however.
2143 2146
2144=head3 Watcher-Specific Functions and Data Members 2147=head3 Watcher-Specific Functions and Data Members
2145 2148
2146=over 4 2149=over 4

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