--- libev/Changes 2010/10/14 04:23:19 1.182 +++ libev/Changes 2012/05/03 16:00:47 1.265 @@ -1,29 +1,124 @@ Revision history for libev, a high-performance and full-featured event loop. -TODO: ABI??? API????? Changes??? -TODO: win32 write() to socket for signal handling -TODO: EV_USE__XXX default with config, document -TODO: portbality section, solaris errno rrentrant, aix, win32, linux 32 bit -TODO: include ev_xyz_start in each example? -TODO: section watcher states/lifetime +TODO: ev_loop_wakeup +TODO: EV_STANDALONE == NO_HASSEL (do not use clock_gettime in ev_standalone) + +TODO: document WSA_EV_USE_SOCKET in win32 part +TODO: ^ OR use WSASend/WSARecv on the handle, which always works +TODO: assert on fd watcher linked list pointing to itself +TODO: faq, process a thing in each iteration +TODO: abuse idle watchers for their side effect +TODO: abuse check watchers for their side effect + - 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 funcitonality (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. + - include sys/syscall.h instead of plain syscall.h. + +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. + +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. - - greatly expanded the portability section. + - 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). @@ -36,10 +131,18 @@ - 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. + - 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 @@ -49,7 +152,7 @@ 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, + - ev_stat watchers could keep an erroneous 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 @@ -65,14 +168,14 @@ - 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. + have caused the problems with 04_stat.t. - add ev::timer->remaining () method to C++ API. 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 + potentially causing crashes and memory corruption on repeated 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 @@ -117,7 +220,7 @@ Malek Hadj-Ali). - implement ev_suspend and ev_resume. - new EV_CUSTOM revents flag for use by applications. - - add documentation section about priorites. + - add documentation section about priorities. - add a glossary to the dcoumentation. - extend the ev_fork description slightly. - optimize a jump out of call_pending. @@ -204,7 +307,7 @@ 3.45 Tue Oct 21 21:59:26 CEST 2008 - disable inotify usage on linux <2.6.25, as it is broken (reported by Yoann Vandoorselaere). - - ev_stat errornously would try to add inotify watchers + - ev_stat erroneously would try to add inotify watchers even when inotify wasn't available (this should only have a performance impact). - ev_once now passes both timeout and io to the callback if both @@ -282,10 +385,10 @@ not clearing revents field in ev_poll (Brandon Black) (no such systems are known at this time). - work around a bug in realloc on openbsd and darwin, - also makes the errornous valgrind complaints + also makes the erroneous valgrind complaints go away (noted by various people). - fix ev_async_pending, add c++ wrapper for ev_async - (based on patch sent by Johannes Deisenhofer. + (based on patch sent by Johannes Deisenhofer). - add sensible set method to ev::embed. - made integer constants type int in ev.h.