| 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 | |
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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 | |
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6 | TODO: document WSA_EV_USE_SOCKET in win32 part |
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7 | TODO: ^ OR use WSASend/WSARecv on the handle, which always works |
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8 | TODO: assert on fd watcher linked list pointing to itself |
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9 | TODO: faq, process a thing in each iteration |
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10 | TODO: abuse idle watchers for their side effect |
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11 | TODO: abuse check watchers for their side effect |
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12 | - add throw() to all libev functions that cannot throw exceptions, for |
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13 | further code size decrease when compiling for C++. |
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14 | - add throw () to callbacks that must not throw exceptions (allocator, |
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15 | syserr, loop acquire/release, periodic reschedule cbs). |
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16 | - fix event_base_loop return code, add event_get_callback, event_base_new, |
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17 | event_base_get_method calls to improve libevent 1.x emulation and add |
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18 | some libevent 2.x funcitonality (based on a patch by Jeff Davey). |
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19 | - add more memory fences to fix a bug reported by Jeff Davey. Better |
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20 | be overfenced than underprotected. |
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21 | - ev_run now returns a boolean status (true meaning watchers are |
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22 | still active). |
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23 | - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with |
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24 | libev's EV_ERROR (reported by 191919). |
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25 | - (ecb) add memory fence support for xlC (Darin McBride). |
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26 | - (ecb) add memory fence support for gcc-mips (Anton Kirilov). |
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27 | - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber). |
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28 | - work around some kernels losing file descriptors by leaking |
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29 | the kqueue descriptor in the child. |
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30 | - include sys/syscall.h instead of plain syscall.h. |
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31 | |
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32 | 4.11 Sat Feb 4 19:52:39 CET 2012 |
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33 | - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as |
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34 | was documented already, but not implemented in the repeating case. |
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35 | - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS. |
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36 | - fix a race where the workaround against the epoll fork bugs |
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37 | caused signals to not be handled anymore. |
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38 | - correct backend_fudge for most backends, and implement a windows |
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39 | specific workaround to avoid looping because we call both |
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40 | select and Sleep, both with different time resolutions. |
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41 | - document range and guarantees of ev_sleep. |
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42 | - document reasonable ranges for periodics interval and offset. |
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43 | - rename backend_fudge to backend_mintime to avoid future confusion :) |
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44 | - change the default periodic reschedule function to hopefully be more |
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45 | exact and correct even in corner cases or in the far future. |
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46 | - do not rely on -lm anymore: use it when available but use our |
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47 | own floor () if it is missing. This should make it easier to embed, |
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48 | as no external libraries are required. |
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49 | - strategically import macros from libecb and mark rarely-used functions |
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50 | as cache-cold (saving almost 2k code size on typical amd64 setups). |
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51 | - add Symbols.ev and Symbols.event files, that were missing. |
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52 | - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now). |
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53 | - fix #3 "be smart about timeouts" to not "deadlock" when |
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54 | timeout == now, also improve the section overall. |
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55 | - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom. |
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56 | - support new EV_API_STATIC mode to make all libev symbols |
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57 | static. |
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58 | - supply default CFLAGS of -g -O3 with gcc when original CFLAGS |
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59 | were empty. |
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60 | |
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61 | 4.04 Wed Feb 16 09:01:51 CET 2011 |
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62 | - fix two problems in the native win32 backend, where reuse of fd's |
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63 | with different underlying handles caused handles not to be removed |
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64 | or added to the select set (analyzed and tested by Bert Belder). |
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65 | - do no rely on ceil() in ev_e?poll.c. |
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66 | - backport libev to HP-UX versions before 11 v3. |
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67 | - configure did not detect nanosleep and clock_gettime properly when |
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68 | they are available in the libc (as opposed to -lrt). |
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69 | |
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70 | 4.03 Tue Jan 11 14:37:25 CET 2011 |
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71 | - officially support polling files with all backends. |
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72 | - support files, /dev/zero etc. the same way as select in the epoll |
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73 | backend, by generating events on our own. |
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74 | - ports backend: work around solaris bug 6874410 and many related ones |
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75 | (EINTR, maybe more), with no performance loss (note that the solaris |
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76 | bug report is actually wrong, reality is far more bizarre and broken |
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77 | than that). |
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78 | - define EV_READ/EV_WRITE as macros in event.h, as some programs use |
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79 | #ifdef to test for them. |
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80 | - new (experimental) function: ev_feed_signal. |
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81 | - new (to become default) EVFLAG_NOSIGMASK flag. |
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82 | - new EVBACKEND_MASK symbol. |
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83 | - updated COMMON IDIOMS SECTION. |
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84 | |
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85 | 4.01 Fri Nov 5 21:51:29 CET 2010 |
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86 | - automake fucked it up, apparently, --add-missing -f is not quite enough |
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87 | to make it update its files, so 4.00 didn't install ev++.h and |
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88 | event.h on make install. grrr. |
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89 | - ev_loop(count|depth) didn't return anything (Robin Haberkorn). |
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90 | - change EV_UNDEF to 0xffffffff to silence some overzealous compilers. |
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91 | - use "(libev) " prefix for all libev error messages now. |
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92 | |
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93 | 4.00 Mon Oct 25 12:32:12 CEST 2010 |
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94 | - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading. |
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95 | - ev_embed_stop did not correctly stop the watcher (very good |
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96 | testcase by Vladimir Timofeev). |
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97 | - ev_run will now always update the current loop time - it erroneously |
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98 | didn't when idle watchers were active, causing timers not to fire. |
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99 | - fix a bug where a timeout of zero caused the timer not to fire |
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100 | in the libevent emulation (testcase by Péter Szabó). |
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101 | - applied win32 fixes by Michael Lenaghan (also James Mansion). |
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102 | - replace EV_MINIMAL by EV_FEATURES. |
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103 | - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it |
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104 | seems the former is *much* faster than the latter. |
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105 | - linux kernel version detection (for inotify bug workarounds) |
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106 | did not work properly. |
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107 | - reduce the number of spurious wake-ups with the ports backend. |
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108 | - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu). |
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109 | - do async init within ev_async_start, not ev_async_set, which avoids |
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110 | an API quirk where the set function must be called in the C++ API |
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111 | even when there is nothing to set. |
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112 | - add (undocumented) EV_ENABLE when adding events with kqueue, |
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113 | this might help with OS X, which seems to need it despite documenting |
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114 | not to need it (helpfully pointed out by Tilghman Lesher). |
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115 | - do not use poll by default on freebsd, it's broken (what isn't |
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116 | on freebsd...). |
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117 | - allow to embed epoll on kernels >= 2.6.32. |
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118 | - configure now prepends -O3, not appends it, so one can still |
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119 | override it. |
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120 | - ev.pod: greatly expanded the portability section, added a porting |
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121 | section, a description of watcher states and made lots of minor fixes. |
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122 | - disable poll backend on AIX, the poll header spams the namespace |
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123 | and it's not worth working around dead platforms (reported |
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124 | and analyzed by Aivars Kalvans). |
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125 | - improve header file compatibility of the standalone eventfd code |
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126 | in an obscure case. |
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127 | - implement EV_AVOID_STDIO option. |
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128 | - do not use sscanf to parse linux version number (smaller, faster, |
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129 | no sscanf dependency). |
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130 | - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings. |
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131 | - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs. |
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132 | - add section on accept() problems to the manpage. |
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133 | - rename EV_TIMEOUT to EV_TIMER. |
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134 | - rename ev_loop_count/depth/verify/loop/unloop. |
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135 | - remove ev_default_destroy and ev_default_fork. |
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136 | - switch to two-digit minor version. |
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137 | - work around an apparent gentoo compiler bug. |
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138 | - define _DARWIN_UNLIMITED_SELECT. just so. |
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139 | - use enum instead of #define for most constants. |
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140 | - improve compatibility to older C++ compilers. |
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141 | - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now |
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142 | default arguments when compiled as C++. |
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143 | - enable automake dependency tracking. |
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144 | - ev_loop_new no longer leaks memory when loop creation failed. |
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145 | - new ev_cleanup watcher type. |
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146 | |
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147 | 3.9 Thu Dec 31 07:59:59 CET 2009 |
| 3 | - signalfd is no longer used by default and has to be requested |
148 | - signalfd is no longer used by default and has to be requested |
| 4 | explicitly - this means that easy to catch bugs become hard to |
149 | explicitly - this means that easy to catch bugs become hard to |
| 5 | catch race conditions, but the users have spoken. |
150 | catch race conditions, but the users have spoken. |
| 6 | - point out the unspecified signal mask in the documentation, and |
151 | - point out the unspecified signal mask in the documentation, and |
| 7 | that this is a race condition regardless of EV_SIGNALFD. |
152 | that this is a race condition regardless of EV_SIGNALFD. |
| 8 | - backport inotify code to C89. |
153 | - backport inotify code to C89. |
| 9 | - inotify file descriptors could leak into child processes. |
154 | - inotify file descriptors could leak into child processes. |
| 10 | - ev_stat watchers could keep an errornous extra ref on the loop, |
155 | - ev_stat watchers could keep an erroneous extra ref on the loop, |
| 11 | preventing exit when unregistering all watchers (testcases |
156 | preventing exit when unregistering all watchers (testcases |
| 12 | provided by ry@tinyclouds.org). |
157 | provided by ry@tinyclouds.org). |
| 13 | - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration |
158 | - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration |
| 14 | symbols to make it easier for apps to do their own fd management. |
159 | symbols to make it easier for apps to do their own fd management. |
| 15 | - support EV_IDLE_ENABLE being disabled in ev++.h |
160 | - support EV_IDLE_ENABLE being disabled in ev++.h |
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| 21 | - changed minimum glibc requirement from glibc 2.9 to 2.7, for |
166 | - changed minimum glibc requirement from glibc 2.9 to 2.7, for |
| 22 | signalfd. |
167 | signalfd. |
| 23 | - add missing string.h include (Denis F. Latypoff). |
168 | - add missing string.h include (Denis F. Latypoff). |
| 24 | - only replace ev_stat.prev when we detect an actual difference, |
169 | - only replace ev_stat.prev when we detect an actual difference, |
| 25 | so prev is (almost) always different to attr. this might |
170 | so prev is (almost) always different to attr. this might |
| 26 | have caused the probems with 04_stat.t. |
171 | have caused the problems with 04_stat.t. |
| 27 | - add ev::timer->remaining () method to C++ API. |
172 | - add ev::timer->remaining () method to C++ API. |
| 28 | |
173 | |
| 29 | 3.8 Sun Aug 9 14:30:45 CEST 2009 |
174 | 3.8 Sun Aug 9 14:30:45 CEST 2009 |
| 30 | - incompatible change: do not necessarily reset signal handler |
175 | - incompatible change: do not necessarily reset signal handler |
| 31 | to SIG_DFL when a sighandler is stopped. |
176 | to SIG_DFL when a sighandler is stopped. |
| 32 | - ev_default_destroy did not properly free or zero some members, |
177 | - ev_default_destroy did not properly free or zero some members, |
| 33 | potentially causing crashes and memory corruption on repated |
178 | potentially causing crashes and memory corruption on repeated |
| 34 | ev_default_destroy/ev_default_loop calls. |
179 | ev_default_destroy/ev_default_loop calls. |
| 35 | - take advantage of signalfd on GNU/Linux systems. |
180 | - take advantage of signalfd on GNU/Linux systems. |
| 36 | - document that the signal mask might be in an unspecified |
181 | - document that the signal mask might be in an unspecified |
| 37 | state when using libev's signal handling. |
182 | state when using libev's signal handling. |
| 38 | - take advantage of some GNU/Linux calls to set cloexec/nonblock |
183 | - take advantage of some GNU/Linux calls to set cloexec/nonblock |
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| 73 | - correctly zero the idx values for arrays, so destroying and |
218 | - correctly zero the idx values for arrays, so destroying and |
| 74 | reinitialising the default loop actually works (patch by |
219 | reinitialising the default loop actually works (patch by |
| 75 | Malek Hadj-Ali). |
220 | Malek Hadj-Ali). |
| 76 | - implement ev_suspend and ev_resume. |
221 | - implement ev_suspend and ev_resume. |
| 77 | - new EV_CUSTOM revents flag for use by applications. |
222 | - new EV_CUSTOM revents flag for use by applications. |
| 78 | - add documentation section about priorites. |
223 | - add documentation section about priorities. |
| 79 | - add a glossary to the dcoumentation. |
224 | - add a glossary to the dcoumentation. |
| 80 | - extend the ev_fork description slightly. |
225 | - extend the ev_fork description slightly. |
| 81 | - optimize a jump out of call_pending. |
226 | - optimize a jump out of call_pending. |
| 82 | |
227 | |
| 83 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
228 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
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| 160 | do similar changes for event.c. |
305 | do similar changes for event.c. |
| 161 | |
306 | |
| 162 | 3.45 Tue Oct 21 21:59:26 CEST 2008 |
307 | 3.45 Tue Oct 21 21:59:26 CEST 2008 |
| 163 | - disable inotify usage on linux <2.6.25, as it is broken |
308 | - disable inotify usage on linux <2.6.25, as it is broken |
| 164 | (reported by Yoann Vandoorselaere). |
309 | (reported by Yoann Vandoorselaere). |
| 165 | - ev_stat errornously would try to add inotify watchers |
310 | - ev_stat erroneously would try to add inotify watchers |
| 166 | even when inotify wasn't available (this should only |
311 | even when inotify wasn't available (this should only |
| 167 | have a performance impact). |
312 | have a performance impact). |
| 168 | - ev_once now passes both timeout and io to the callback if both |
313 | - ev_once now passes both timeout and io to the callback if both |
| 169 | occur concurrently, instead of giving timeouts precedence. |
314 | occur concurrently, instead of giving timeouts precedence. |
| 170 | - disable EV_USE_INOTIFY when sys/inotify.h is too old. |
315 | - disable EV_USE_INOTIFY when sys/inotify.h is too old. |
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| 238 | - enable inlining with gcc versions 2 and 3. |
383 | - enable inlining with gcc versions 2 and 3. |
| 239 | - work around broken poll implementations potentially |
384 | - work around broken poll implementations potentially |
| 240 | not clearing revents field in ev_poll (Brandon Black) |
385 | not clearing revents field in ev_poll (Brandon Black) |
| 241 | (no such systems are known at this time). |
386 | (no such systems are known at this time). |
| 242 | - work around a bug in realloc on openbsd and darwin, |
387 | - work around a bug in realloc on openbsd and darwin, |
| 243 | also makes the errornous valgrind complaints |
388 | also makes the erroneous valgrind complaints |
| 244 | go away (noted by various people). |
389 | go away (noted by various people). |
| 245 | - fix ev_async_pending, add c++ wrapper for ev_async |
390 | - fix ev_async_pending, add c++ wrapper for ev_async |
| 246 | (based on patch sent by Johannes Deisenhofer. |
391 | (based on patch sent by Johannes Deisenhofer). |
| 247 | - add sensible set method to ev::embed. |
392 | - add sensible set method to ev::embed. |
| 248 | - made integer constants type int in ev.h. |
393 | - made integer constants type int in ev.h. |
| 249 | |
394 | |
| 250 | 3.2 Wed Apr 2 17:11:19 CEST 2008 |
395 | 3.2 Wed Apr 2 17:11:19 CEST 2008 |
| 251 | - fix a 64 bit overflow issue in the select backend, |
396 | - fix a 64 bit overflow issue in the select backend, |
