- bump version to 4.24, as the release tarball inexplicably
didn't have the right version in ev.h, even though the cvs-tagged
version did have the right one
4.23:
- move some declarations at the beginning to help certain retarded
microsoft compilers, even though their documentation claims
otherwise
- when epoll detects unremovable fds in the fd set, rebuild
only the epoll descriptor, not the signal pipe, to avoid
SIGPIPE in ev_async_send. This doesn't solve it on fork,
so document what needs to be done in ev_loop_fork
- remove superfluous sys/timeb.h include on win32
- updated libecb.
Issues found with existing distfiles:
distfiles/eclipse-sourceBuild-srcIncluded-3.0.1.zip
distfiles/fortran-utils-1.1.tar.gz
distfiles/ivykis-0.39.tar.gz
distfiles/enum-1.11.tar.gz
distfiles/pvs-3.2-libraries.tgz
distfiles/pvs-3.2-linux.tgz
distfiles/pvs-3.2-solaris.tgz
distfiles/pvs-3.2-system.tgz
No changes made to these distinfo files.
Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden). All existing
SHA1 digests retained for now as an audit trail.
- prefer noexcept over throw () with C++ 11.
- update ecb.h due to incompatibilities with c11.
- fix a potential aliasing issue when reading and writing
watcher callbacks.
- destroying a non-default loop would stop the global waitpid
watcher (Denis Bilenko).
- queueing pending watchers of higher priority from a watcher now invokes
them in a timely fashion (reported by Denis Bilenko).
- add throw() to all libev functions that cannot throw exceptions, for
further code size decrease when compiling for C++.
- add throw () to callbacks that must not throw exceptions (allocator,
syserr, loop acquire/release, periodic reschedule cbs).
- fix event_base_loop return code, add event_get_callback, event_base_new,
event_base_get_method calls to improve libevent 1.x emulation and add
some libevent 2.x functionality (based on a patch by Jeff Davey).
- add more memory fences to fix a bug reported by Jeff Davey. Better
be overfenced than underprotected.
- ev_run now returns a boolean status (true meaning watchers are
still active).
- ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with
libev's EV_ERROR (reported by 191919).
- (ecb) add memory fence support for xlC (Darin McBride).
- (ecb) add memory fence support for gcc-mips (Anton Kirilov).
- (ecb) add memory fence support for gcc-alpha (Christian Weisgerber).
- work around some kernels losing file descriptors by leaking
the kqueue descriptor in the child.
- work around linux inotify not reporting IN_ATTRIB changes for directories
in many cases.
- include sys/syscall.h instead of plain syscall.h.
- check for io watcher loops in ev_verify, check for the most
common reported usage bug in ev_io_start.
- chose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET.
- always use WSASend/WSARecv directly on windows, hoping that this
works in all cases (unlike read/write/send/recv...).
- try to detect signals around a fork faster (test program by
Denis Bilenko).
- work around recent glibc versions that leak memory in realloc.
- rename ev::embed::set to ev::embed::set_embed to avoid clashing
the watcher base set (loop) method.
- rewrite the async/signal pipe logic to always keep a valid fd, which
simplifies (and hopefuly correctifies :) the race checking
on fork, at the cost of one extra fd.
- add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of
inotify-supporting filesystems.
- move orig_CFLAGS assignment to after AC_INIT, as newer autoconf
versions ignore it before
(https://bugzilla.redhat.com/show_bug.cgi?id=908096).
- add some untested android support.
- enum expressions must be of type int (reported by Juan Pablo L).
4.11 Sat Feb 4 19:52:39 CET 2012
- INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as
was documented already, but not implemented in the repeating case.
- new compiletime symbols: EV_NO_SMP and EV_NO_THREADS.
- fix a race where the workaround against the epoll fork bugs
caused signals to not be handled anymore.
- correct backend_fudge for most backends, and implement a windows
specific workaround to avoid looping because we call both
select and Sleep, both with different time resolutions.
- document range and guarantees of ev_sleep.
- document reasonable ranges for periodics interval and offset.
- rename backend_fudge to backend_mintime to avoid future confusion :)
- change the default periodic reschedule function to hopefully be more
exact and correct even in corner cases or in the far future.
- do not rely on -lm anymore: use it when available but use our
own floor () if it is missing. This should make it easier to embed,
as no external libraries are required.
- strategically import macros from libecb and mark rarely-used functions
as cache-cold (saving almost 2k code size on typical amd64 setups).
- add Symbols.ev and Symbols.event files, that were missing.
- fix backend_mintime value for epoll (was 1/1024, is 1/1000 now).
- fix#3 "be smart about timeouts" to not "deadlock" when
timeout == now, also improve the section overall.
- avoid "AVOIDING FINISHING BEFORE RETURNING" idiom.
- support new EV_API_STATIC mode to make all libev symbols
static.
- supply default CFLAGS of -g -O3 with gcc when original CFLAGS
were empty.
Provided by Oleksandr Kozachuk in PR pkg/44690
Changes:
4.04 Wed Feb 16 09:01:51 CET 2011
- fix two problems in the native win32 backend, where reuse of fd's
with different underlying handles caused handles not to be removed
or added to the select set (analyzed and tested by Bert Belder).
- do no rely on ceil() in ev_e?poll.c.
- backport libev to HP-UX versions before 11 v3.
- configure did not detect nanosleep and clock_gettime properly when
they are available in the libc (as opposed to -lrt).
4.03 Tue Jan 11 14:37:25 CET 2011
- officially support polling files with all backends.
- support files, /dev/zero etc. the same way as select in the epoll
backend, by generating events on our own.
- ports backend: work around solaris bug 6874410 and many related ones
(EINTR, maybe more), with no performance loss (note that the solaris
bug report is actually wrong, reality is far more bizarre and broken
than that).
- define EV_READ/EV_WRITE as macros in event.h, as some programs use
#ifdef to test for them.
- new (experimental) function: ev_feed_signal.
- new (to become default) EVFLAG_NOSIGMASK flag.
- new EVBACKEND_MASK symbol.
- updated COMMON IDIOMS SECTION.
4.01 Fri Nov 5 21:51:29 CET 2010
- automake fucked it up, apparently, --add-missing -f is not quite enough
to make it update its files, so 4.00 didn't install ev++.h and
event.h on make install. grrr.
- ev_loop(count|depth) didn't return anything (Robin Haberkorn).
- change EV_UNDEF to 0xffffffff to silence some overzealous compilers.
- use "(libev) " prefix for all libev error messages now.
4.00 Mon Oct 25 12:32:12 CEST 2010
- "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading.
- ev_embed_stop did not correctly stop the watcher (very good
testcase by Vladimir Timofeev).
- ev_run will now always update the current loop time - it erroneously
didn't when idle watchers were active, causing timers not to fire.
- fix a bug where a timeout of zero caused the timer not to fire
in the libevent emulation (testcase by Péter Szabó).
- applied win32 fixes by Michael Lenaghan (also James Mansion).
- replace EV_MINIMAL by EV_FEATURES.
- prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it
seems the former is *much* faster than the latter.
- linux kernel version detection (for inotify bug workarounds)
did not work properly.
- reduce the number of spurious wake-ups with the ports backend.
- remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
- do async init within ev_async_start, not ev_async_set, which avoids
an API quirk where the set function must be called in the C++ API
even when there is nothing to set.
- add (undocumented) EV_ENABLE when adding events with kqueue,
this might help with OS X, which seems to need it despite documenting
not to need it (helpfully pointed out by Tilghman Lesher).
- do not use poll by default on freebsd, it's broken (what isn't
on freebsd...).
- allow to embed epoll on kernels >= 2.6.32.
- configure now prepends -O3, not appends it, so one can still
override it.
- ev.pod: greatly expanded the portability section, added a porting
section, a description of watcher states and made lots of minor fixes.
- disable poll backend on AIX, the poll header spams the namespace
and it's not worth working around dead platforms (reported
and analyzed by Aivars Kalvans).
- improve header file compatibility of the standalone eventfd code
in an obscure case.
- implement EV_AVOID_STDIO option.
- do not use sscanf to parse linux version number (smaller, faster,
no sscanf dependency).
- new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
- update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs.
- add section on accept() problems to the manpage.
- rename EV_TIMEOUT to EV_TIMER.
- rename ev_loop_count/depth/verify/loop/unloop.
- remove ev_default_destroy and ev_default_fork.
- switch to two-digit minor version.
- work around an apparent gentoo compiler bug.
- define _DARWIN_UNLIMITED_SELECT. just so.
- use enum instead of #define for most constants.
- improve compatibility to older C++ compilers.
- (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now
default arguments when compiled as C++.
- enable automake dependency tracking.
- ev_loop_new no longer leaks memory when loop creation failed.
- new ev_cleanup watcher type.
3.9 Thu Dec 31 07:59:59 CET 2009
- signalfd is no longer used by default and has to be requested
explicitly - this means that easy to catch bugs become hard to
catch race conditions, but the users have spoken.
- point out the unspecified signal mask in the documentation, and
that this is a race condition regardless of EV_SIGNALFD.
- backport inotify code to C89.
- inotify file descriptors could leak into child processes.
- ev_stat watchers could keep an errornous extra ref on the loop,
preventing exit when unregistering all watchers (testcases
provided by ry@tinyclouds.org).
- implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
symbols to make it easier for apps to do their own fd management.
- support EV_IDLE_ENABLE being disabled in ev++.h
(patch by Didier Spezia).
- take advantage of inotify_init1, if available, to set cloexec/nonblock
on fd creation, to avoid races.
- the signal handling pipe wasn't always initialised under windows
(analysed by lekma).
- changed minimum glibc requirement from glibc 2.9 to 2.7, for
signalfd.
- add missing string.h include (Denis F. Latypoff).
- only replace ev_stat.prev when we detect an actual difference,
so prev is (almost) always different to attr. this might
have caused the probems with 04_stat.t.
- add ev::timer->remaining () method to C++ API.
- bumping API/ABI-depends, because upstream change says nothing about
ABI/API incompatible change
Upstream changes:
3.8 Sun Aug 9 14:30:45 CEST 2009
- incompatible change: do not necessarily reset signal handler
to SIG_DFL when a sighandler is stopped.
- ev_default_destroy did not properly free or zero some members,
potentially causing crashes and memory corruption on repated
ev_default_destroy/ev_default_loop calls.
- take advantage of signalfd on GNU/Linux systems.
- document that the signal mask might be in an unspecified
state when using libev's signal handling.
- take advantage of some GNU/Linux calls to set cloexec/nonblock
on fd creation, to avoid race conditions.
module AnyEvent).
Libev is modelled (very losely) after libevent and the Event perl
module, but is faster, scales better and is more correct, and also more
featureful. And also smaller. Yay.
Some of the specialties of libev not commonly found elsewhere are:
- extensive and detailed, readable documentation (not doxygen garbage).
- fully supports fork, can detect fork in various ways and automatically
re-arms kernel mechanisms that do not support fork.
- highly optimised select, poll, epoll, kqueue and event ports backends.
- filesystem object (path) watching (with optional linux inotify support).
- wallclock-based times (using absolute time, cron-like).
- relative timers/timeouts (handle time jumps).
- fast intra-thread communication between multiple
event loops (with optional fast linux eventfd backend).
- extremely easy to embed.
- very small codebase, no bloated library.
- fully extensible by being able to plug into the event loop,
integrate other event loops, integrate other event loop users.
- very little memory use (small watchers, small event loop data).
- optional C++ interface allowing method and function callbacks
at no extra memory or runtime overhead.
- optional Perl interface with similar characteristics (capable
of running Glib/Gtk2 on libev, interfaces with Net::SNMP and
libadns).
- support for other languages (multiple C++ interfaces, D, Ruby,
Python) available from third-parties.
Examples of programs that embed libev: the EV perl module,
rxvt-unicode, gvpe (GNU Virtual Private Ethernet), the Deliantra MMORPG
server (http://www.deliantra.net/), Rubinius (a next-generation Ruby
VM), the Ebb web server, the Rev event toolkit.
