| 1 | Revision history for libev, a high-performance and full-featured event loop. |
1 | Revision history for libev, a high-performance and full-featured event loop. |
| 2 | |
2 | |
| 3 | TODO: include ev_xyz_start in each example? |
3 | TODO: ev_loop_wakeup |
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4 | TODO: EV_STANDALONE == NO_HASSEL (do not use clock_gettime in ev_standalone) |
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5 | TODO: faq, process a thing in each iteration |
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6 | TODO: dbeugging tips, ev_verify, ev_init twice |
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7 | TODO: ev_break for immediate exit (EVBREAK_NOW?) |
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8 | TODO: ev_feed_child_event |
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9 | |
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10 | TODO: document the special problem of signals around fork. |
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11 | TODO: store pid for each signal |
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12 | TODO: document file descriptor usage per loop |
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13 | - destroying a non-default loop would stop the global waitpid |
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14 | watcher (Denis Bilenko). |
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15 | - queueing pending watchers of higher priority from a watcher now invokes |
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16 | them in a timely fashion (reported by Denis Bilenko). |
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17 | - add throw() to all libev functions that cannot throw exceptions, for |
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18 | further code size decrease when compiling for C++. |
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19 | - add throw () to callbacks that must not throw exceptions (allocator, |
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20 | syserr, loop acquire/release, periodic reschedule cbs). |
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21 | - fix event_base_loop return code, add event_get_callback, event_base_new, |
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22 | event_base_get_method calls to improve libevent 1.x emulation and add |
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23 | some libevent 2.x functionality (based on a patch by Jeff Davey). |
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24 | - add more memory fences to fix a bug reported by Jeff Davey. Better |
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25 | be overfenced than underprotected. |
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26 | - ev_run now returns a boolean status (true meaning watchers are |
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27 | still active). |
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28 | - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with |
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29 | libev's EV_ERROR (reported by 191919). |
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30 | - (ecb) add memory fence support for xlC (Darin McBride). |
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31 | - (ecb) add memory fence support for gcc-mips (Anton Kirilov). |
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32 | - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber). |
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33 | - work around some kernels losing file descriptors by leaking |
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34 | the kqueue descriptor in the child. |
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35 | - include sys/syscall.h instead of plain syscall.h. |
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36 | - check for io watcher loops in ev_verify, check for the most |
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37 | common reported usage bug in ev_io_start. |
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38 | - chose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET. |
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39 | - always use WSASend/WSARecv directly on windows, hoping that this |
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40 | works in all cases (unlike read/write/send/recv...). |
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41 | - try to detect signals around a fork faster (test program by |
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42 | Denis Bilenko). |
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43 | - work around recent glibc versions that leak memory in realloc. |
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44 | - rename ev::embed::set to ev::embed::set_embed to avoid clashing |
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45 | the watcher base set (loop) method. |
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46 | - rewrite the async/signal pipe logic to always keep a valid fd, which |
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47 | simplifies (and hopefuly correctifies :) the race checking |
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48 | on fork, at the cost of one extra fd. |
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49 | |
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50 | 4.11 Sat Feb 4 19:52:39 CET 2012 |
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51 | - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as |
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52 | was documented already, but not implemented in the repeating case. |
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53 | - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS. |
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54 | - fix a race where the workaround against the epoll fork bugs |
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55 | caused signals to not be handled anymore. |
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56 | - correct backend_fudge for most backends, and implement a windows |
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57 | specific workaround to avoid looping because we call both |
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58 | select and Sleep, both with different time resolutions. |
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59 | - document range and guarantees of ev_sleep. |
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60 | - document reasonable ranges for periodics interval and offset. |
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61 | - rename backend_fudge to backend_mintime to avoid future confusion :) |
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62 | - change the default periodic reschedule function to hopefully be more |
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63 | exact and correct even in corner cases or in the far future. |
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64 | - do not rely on -lm anymore: use it when available but use our |
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65 | own floor () if it is missing. This should make it easier to embed, |
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66 | as no external libraries are required. |
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67 | - strategically import macros from libecb and mark rarely-used functions |
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68 | as cache-cold (saving almost 2k code size on typical amd64 setups). |
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69 | - add Symbols.ev and Symbols.event files, that were missing. |
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70 | - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now). |
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71 | - fix #3 "be smart about timeouts" to not "deadlock" when |
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72 | timeout == now, also improve the section overall. |
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73 | - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom. |
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74 | - support new EV_API_STATIC mode to make all libev symbols |
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75 | static. |
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76 | - supply default CFLAGS of -g -O3 with gcc when original CFLAGS |
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77 | were empty. |
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78 | |
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79 | 4.04 Wed Feb 16 09:01:51 CET 2011 |
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80 | - fix two problems in the native win32 backend, where reuse of fd's |
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81 | with different underlying handles caused handles not to be removed |
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82 | or added to the select set (analyzed and tested by Bert Belder). |
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83 | - do no rely on ceil() in ev_e?poll.c. |
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84 | - backport libev to HP-UX versions before 11 v3. |
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85 | - configure did not detect nanosleep and clock_gettime properly when |
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86 | they are available in the libc (as opposed to -lrt). |
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87 | |
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88 | 4.03 Tue Jan 11 14:37:25 CET 2011 |
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89 | - officially support polling files with all backends. |
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90 | - support files, /dev/zero etc. the same way as select in the epoll |
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91 | backend, by generating events on our own. |
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92 | - ports backend: work around solaris bug 6874410 and many related ones |
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93 | (EINTR, maybe more), with no performance loss (note that the solaris |
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94 | bug report is actually wrong, reality is far more bizarre and broken |
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95 | than that). |
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96 | - define EV_READ/EV_WRITE as macros in event.h, as some programs use |
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97 | #ifdef to test for them. |
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98 | - new (experimental) function: ev_feed_signal. |
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99 | - new (to become default) EVFLAG_NOSIGMASK flag. |
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100 | - new EVBACKEND_MASK symbol. |
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101 | - updated COMMON IDIOMS SECTION. |
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102 | |
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103 | 4.01 Fri Nov 5 21:51:29 CET 2010 |
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104 | - automake fucked it up, apparently, --add-missing -f is not quite enough |
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105 | to make it update its files, so 4.00 didn't install ev++.h and |
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106 | event.h on make install. grrr. |
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107 | - ev_loop(count|depth) didn't return anything (Robin Haberkorn). |
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108 | - change EV_UNDEF to 0xffffffff to silence some overzealous compilers. |
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109 | - use "(libev) " prefix for all libev error messages now. |
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110 | |
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111 | 4.00 Mon Oct 25 12:32:12 CEST 2010 |
| 4 | - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading. |
112 | - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading. |
| 5 | - ev_embed_stop did not correctly stop the watcher (very good |
113 | - ev_embed_stop did not correctly stop the watcher (very good |
| 6 | testcase by Vladimir Timofeev). |
114 | testcase by Vladimir Timofeev). |
| 7 | - ev_run will now always update the current loop time - it erroneously |
115 | - ev_run will now always update the current loop time - it erroneously |
| 8 | didn't when idle watchers were active, causing timers not to fire. |
116 | didn't when idle watchers were active, causing timers not to fire. |
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| 10 | in the libevent emulation (testcase by Péter Szabó). |
118 | in the libevent emulation (testcase by Péter Szabó). |
| 11 | - applied win32 fixes by Michael Lenaghan (also James Mansion). |
119 | - applied win32 fixes by Michael Lenaghan (also James Mansion). |
| 12 | - replace EV_MINIMAL by EV_FEATURES. |
120 | - replace EV_MINIMAL by EV_FEATURES. |
| 13 | - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it |
121 | - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it |
| 14 | seems the former is *much* faster than the latter. |
122 | seems the former is *much* faster than the latter. |
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123 | - linux kernel version detection (for inotify bug workarounds) |
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124 | did not work properly. |
| 15 | - reduce the number of spurious wake-ups with the ports backend. |
125 | - reduce the number of spurious wake-ups with the ports backend. |
| 16 | - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu). |
126 | - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu). |
| 17 | - do async init within ev_async_start, not ev_async_set, which avoids |
127 | - do async init within ev_async_start, not ev_async_set, which avoids |
| 18 | an API quirk where the set function must be called in the C++ API |
128 | an API quirk where the set function must be called in the C++ API |
| 19 | even when there is nothing to set. |
129 | even when there is nothing to set. |
| 20 | - add (undocumented) EV_ENABLE when adding events with kqueue, |
130 | - add (undocumented) EV_ENABLE when adding events with kqueue, |
| 21 | this might help with OS X, which seems to need it despite documenting |
131 | this might help with OS X, which seems to need it despite documenting |
| 22 | not to need it (helpfully pointed out by Tilghman Lesher). |
132 | not to need it (helpfully pointed out by Tilghman Lesher). |
| 23 | - do not use poll by default on freebsd, it's broken (what isn't |
133 | - do not use poll by default on freebsd, it's broken (what isn't |
| 24 | on freebsd...). |
134 | on freebsd...). |
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135 | - allow to embed epoll on kernels >= 2.6.32. |
| 25 | - configure now prepends -O3, not appends it, so one can still |
136 | - configure now prepends -O3, not appends it, so one can still |
| 26 | override it. |
137 | override it. |
| 27 | - ev.pod: greatly expanded the portability section, added a porting |
138 | - ev.pod: greatly expanded the portability section, added a porting |
| 28 | section, a description of watcher states and made lots of minor fixes. |
139 | section, a description of watcher states and made lots of minor fixes. |
| 29 | - disable poll backend on AIX, the poll header spams the namespace |
140 | - disable poll backend on AIX, the poll header spams the namespace |
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| 37 | - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings. |
148 | - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings. |
| 38 | - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs. |
149 | - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs. |
| 39 | - add section on accept() problems to the manpage. |
150 | - add section on accept() problems to the manpage. |
| 40 | - rename EV_TIMEOUT to EV_TIMER. |
151 | - rename EV_TIMEOUT to EV_TIMER. |
| 41 | - rename ev_loop_count/depth/verify/loop/unloop. |
152 | - rename ev_loop_count/depth/verify/loop/unloop. |
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153 | - remove ev_default_destroy and ev_default_fork. |
| 42 | - switch to two-digit minor version. |
154 | - switch to two-digit minor version. |
| 43 | - work around an apparent gentoo compiler bug. |
155 | - work around an apparent gentoo compiler bug. |
| 44 | - define _DARWIN_UNLIMITED_SELECT. just so. |
156 | - define _DARWIN_UNLIMITED_SELECT. just so. |
| 45 | - use enum instead of #define for most constants. |
157 | - use enum instead of #define for most constants. |
| 46 | - improve compatibility to older C++ compilers. |
158 | - improve compatibility to older C++ compilers. |
| 47 | - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now |
159 | - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now |
| 48 | default arguments when compiled as C++. |
160 | default arguments when compiled as C++. |
| 49 | - (experimental) all ev_functions that accept only a loop argument |
161 | - enable automake dependency tracking. |
| 50 | default that to EV_DEFAULT_UC when compiled as C++. |
162 | - ev_loop_new no longer leaks memory when loop creation failed. |
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163 | - new ev_cleanup watcher type. |
| 51 | |
164 | |
| 52 | 3.9 Thu Dec 31 07:59:59 CET 2009 |
165 | 3.9 Thu Dec 31 07:59:59 CET 2009 |
| 53 | - signalfd is no longer used by default and has to be requested |
166 | - signalfd is no longer used by default and has to be requested |
| 54 | explicitly - this means that easy to catch bugs become hard to |
167 | explicitly - this means that easy to catch bugs become hard to |
| 55 | catch race conditions, but the users have spoken. |
168 | catch race conditions, but the users have spoken. |
| 56 | - point out the unspecified signal mask in the documentation, and |
169 | - point out the unspecified signal mask in the documentation, and |
| 57 | that this is a race condition regardless of EV_SIGNALFD. |
170 | that this is a race condition regardless of EV_SIGNALFD. |
| 58 | - backport inotify code to C89. |
171 | - backport inotify code to C89. |
| 59 | - inotify file descriptors could leak into child processes. |
172 | - inotify file descriptors could leak into child processes. |
| 60 | - ev_stat watchers could keep an errornous extra ref on the loop, |
173 | - ev_stat watchers could keep an erroneous extra ref on the loop, |
| 61 | preventing exit when unregistering all watchers (testcases |
174 | preventing exit when unregistering all watchers (testcases |
| 62 | provided by ry@tinyclouds.org). |
175 | provided by ry@tinyclouds.org). |
| 63 | - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration |
176 | - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration |
| 64 | symbols to make it easier for apps to do their own fd management. |
177 | symbols to make it easier for apps to do their own fd management. |
| 65 | - support EV_IDLE_ENABLE being disabled in ev++.h |
178 | - support EV_IDLE_ENABLE being disabled in ev++.h |
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| 123 | - correctly zero the idx values for arrays, so destroying and |
236 | - correctly zero the idx values for arrays, so destroying and |
| 124 | reinitialising the default loop actually works (patch by |
237 | reinitialising the default loop actually works (patch by |
| 125 | Malek Hadj-Ali). |
238 | Malek Hadj-Ali). |
| 126 | - implement ev_suspend and ev_resume. |
239 | - implement ev_suspend and ev_resume. |
| 127 | - new EV_CUSTOM revents flag for use by applications. |
240 | - new EV_CUSTOM revents flag for use by applications. |
| 128 | - add documentation section about priorites. |
241 | - add documentation section about priorities. |
| 129 | - add a glossary to the dcoumentation. |
242 | - add a glossary to the dcoumentation. |
| 130 | - extend the ev_fork description slightly. |
243 | - extend the ev_fork description slightly. |
| 131 | - optimize a jump out of call_pending. |
244 | - optimize a jump out of call_pending. |
| 132 | |
245 | |
| 133 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
246 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
