| 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. |
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2 | |
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3 | TODO: ev_loop_prefork hint? |
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4 | TODO: ev_loop_wakeup |
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5 | TODO: confusion about threads ongiong |
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6 | TODO: not_blocked flag. |
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7 | |
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8 | - correct backend_fudge for most backends, and implement a windows |
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9 | specific workaround to avoid looping because we call both |
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10 | select and Sleep, both with different time resolutions. |
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11 | - change the default periodic reschedule function to hopefully be more |
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12 | exact and correct even in corner cases or in the far future. |
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13 | - document reasonable ranges for interval and offset. |
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14 | - do not rely on -lm anymore: use it when available but use our |
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15 | own floor () if it is missing. This should make it easier to embed. |
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16 | |
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17 | 4.04 Wed Feb 16 09:01:51 CET 2011 |
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18 | - fix two problems in the native win32 backend, where reuse of fd's |
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19 | with different underlying handles caused handles not to be removed |
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20 | or added to the select set (analyzed and tested by Bert Belder). |
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21 | - do no rely on ceil() in ev_e?poll.c. |
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22 | - backport libev to HP-UX versions before 11 v3. |
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23 | - configure did not detect nanosleep and clock_gettime properly when |
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24 | they are available in the libc (as opposed to -lrt). |
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25 | |
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26 | 4.03 Tue Jan 11 14:37:25 CET 2011 |
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27 | - officially support polling files with all backends. |
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28 | - support files, /dev/zero etc. the same way as select in the epoll |
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29 | backend, by generating events on our own. |
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30 | - ports backend: work around solaris bug 6874410 and many related ones |
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31 | (EINTR, maybe more), with no performance loss (note that the solaris |
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32 | bug report is actually wrong, reality is far more bizarre and broken |
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33 | than that). |
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34 | - define EV_READ/EV_WRITE as macros in event.h, as some programs use |
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35 | #ifdef to test for them. |
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36 | - new (experimental) function: ev_feed_signal. |
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37 | - new (to become default) EVFLAG_NOSIGMASK flag. |
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38 | - new EVBACKEND_MASK symbol. |
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39 | - updated COMMON IDIOMS SECTION. |
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40 | |
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41 | 4.01 Fri Nov 5 21:51:29 CET 2010 |
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42 | - automake fucked it up, apparently, --add-missing -f is not quite enough |
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43 | to make it update its files, so 4.00 didn't install ev++.h and |
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44 | event.h on make install. grrr. |
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45 | - ev_loop(count|depth) didn't return anything (Robin Haberkorn). |
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46 | - change EV_UNDEF to 0xffffffff to silence some overzealous compilers. |
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47 | - use "(libev) " prefix for all libev error messages now. |
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48 | |
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49 | 4.00 Mon Oct 25 12:32:12 CEST 2010 |
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50 | - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading. |
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51 | - ev_embed_stop did not correctly stop the watcher (very good |
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52 | testcase by Vladimir Timofeev). |
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53 | - ev_run will now always update the current loop time - it erroneously |
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54 | didn't when idle watchers were active, causing timers not to fire. |
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55 | - fix a bug where a timeout of zero caused the timer not to fire |
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56 | in the libevent emulation (testcase by Péter Szabó). |
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57 | - applied win32 fixes by Michael Lenaghan (also James Mansion). |
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58 | - replace EV_MINIMAL by EV_FEATURES. |
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59 | - prefer EPOLL_CTL_ADD over EPOLL_CTL_MOD in some more cases, as it |
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60 | seems the former is *much* faster than the latter. |
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61 | - linux kernel version detection (for inotify bug workarounds) |
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62 | did not work properly. |
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63 | - reduce the number of spurious wake-ups with the ports backend. |
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64 | - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu). |
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65 | - do async init within ev_async_start, not ev_async_set, which avoids |
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66 | an API quirk where the set function must be called in the C++ API |
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67 | even when there is nothing to set. |
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68 | - add (undocumented) EV_ENABLE when adding events with kqueue, |
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69 | this might help with OS X, which seems to need it despite documenting |
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70 | not to need it (helpfully pointed out by Tilghman Lesher). |
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71 | - do not use poll by default on freebsd, it's broken (what isn't |
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72 | on freebsd...). |
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73 | - allow to embed epoll on kernels >= 2.6.32. |
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74 | - configure now prepends -O3, not appends it, so one can still |
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75 | override it. |
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76 | - ev.pod: greatly expanded the portability section, added a porting |
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77 | section, a description of watcher states and made lots of minor fixes. |
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78 | - disable poll backend on AIX, the poll header spams the namespace |
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79 | and it's not worth working around dead platforms (reported |
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80 | and analyzed by Aivars Kalvans). |
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81 | - improve header file compatibility of the standalone eventfd code |
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82 | in an obscure case. |
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83 | - implement EV_AVOID_STDIO option. |
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84 | - do not use sscanf to parse linux version number (smaller, faster, |
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85 | no sscanf dependency). |
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86 | - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings. |
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87 | - update libev.m4 HAVE_CLOCK_SYSCALL test for newer glibcs. |
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88 | - add section on accept() problems to the manpage. |
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89 | - rename EV_TIMEOUT to EV_TIMER. |
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90 | - rename ev_loop_count/depth/verify/loop/unloop. |
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91 | - remove ev_default_destroy and ev_default_fork. |
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92 | - switch to two-digit minor version. |
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93 | - work around an apparent gentoo compiler bug. |
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94 | - define _DARWIN_UNLIMITED_SELECT. just so. |
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95 | - use enum instead of #define for most constants. |
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96 | - improve compatibility to older C++ compilers. |
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97 | - (experimental) ev_run/ev_default_loop/ev_break/ev_loop_new have now |
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98 | default arguments when compiled as C++. |
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99 | - enable automake dependency tracking. |
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100 | - ev_loop_new no longer leaks memory when loop creation failed. |
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101 | - new ev_cleanup watcher type. |
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102 | |
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103 | 3.9 Thu Dec 31 07:59:59 CET 2009 |
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104 | - signalfd is no longer used by default and has to be requested |
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105 | explicitly - this means that easy to catch bugs become hard to |
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106 | catch race conditions, but the users have spoken. |
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107 | - point out the unspecified signal mask in the documentation, and |
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108 | that this is a race condition regardless of EV_SIGNALFD. |
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109 | - backport inotify code to C89. |
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110 | - inotify file descriptors could leak into child processes. |
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111 | - ev_stat watchers could keep an errornous extra ref on the loop, |
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112 | preventing exit when unregistering all watchers (testcases |
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113 | provided by ry@tinyclouds.org). |
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114 | - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration |
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115 | symbols to make it easier for apps to do their own fd management. |
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116 | - support EV_IDLE_ENABLE being disabled in ev++.h |
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117 | (patch by Didier Spezia). |
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118 | - take advantage of inotify_init1, if available, to set cloexec/nonblock |
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119 | on fd creation, to avoid races. |
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120 | - the signal handling pipe wasn't always initialised under windows |
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121 | (analysed by lekma). |
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122 | - changed minimum glibc requirement from glibc 2.9 to 2.7, for |
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123 | signalfd. |
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124 | - add missing string.h include (Denis F. Latypoff). |
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125 | - only replace ev_stat.prev when we detect an actual difference, |
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126 | so prev is (almost) always different to attr. this might |
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127 | have caused the problems with 04_stat.t. |
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128 | - add ev::timer->remaining () method to C++ API. |
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129 | |
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130 | 3.8 Sun Aug 9 14:30:45 CEST 2009 |
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131 | - incompatible change: do not necessarily reset signal handler |
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132 | to SIG_DFL when a sighandler is stopped. |
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133 | - ev_default_destroy did not properly free or zero some members, |
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134 | potentially causing crashes and memory corruption on repeated |
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135 | ev_default_destroy/ev_default_loop calls. |
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136 | - take advantage of signalfd on GNU/Linux systems. |
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137 | - document that the signal mask might be in an unspecified |
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138 | state when using libev's signal handling. |
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139 | - take advantage of some GNU/Linux calls to set cloexec/nonblock |
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140 | on fd creation, to avoid race conditions. |
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141 | |
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142 | 3.7 Fri Jul 17 16:36:32 CEST 2009 |
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143 | - ev_unloop and ev_loop wrongly used a global variable to exit loops, |
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144 | instead of using a per-loop variable (bug caught by accident...). |
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145 | - the ev_set_io_collect_interval interpretation has changed. |
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146 | - add new functionality: ev_set_userdata, ev_userdata, |
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147 | ev_set_invoke_pending_cb, ev_set_loop_release_cb, |
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148 | ev_invoke_pending, ev_pending_count, together with a long example |
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149 | about thread locking. |
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150 | - add ev_timer_remaining (as requested by Denis F. Latypoff). |
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151 | - add ev_loop_depth. |
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152 | - calling ev_unloop in fork/prepare watchers will no longer poll |
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153 | for new events. |
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154 | - Denis F. Latypoff corrected many typos in example code snippets. |
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155 | - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double- |
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156 | check that the syscall number is available before trying to |
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157 | use it (reported by ry@tinyclouds). |
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158 | - use GetSystemTimeAsFileTime instead of _timeb on windows, for |
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159 | slightly higher accuracy. |
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160 | - properly declare ev_loop_verify and ev_now_update even when |
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161 | !EV_MULTIPLICITY. |
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162 | - do not compile in any priority code when EV_MAXPRI == EV_MINPRI. |
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163 | - support EV_MINIMAL==2 for a reduced API. |
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164 | - actually 0-initialise struct sigaction when installing signals. |
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165 | - add section on hibernate and stopped processes to ev_timer docs. |
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166 | |
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167 | 3.6 Tue Apr 28 02:49:30 CEST 2009 |
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168 | - multiple timers becoming ready within an event loop iteration |
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169 | will be invoked in the "correct" order now. |
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170 | - do not leave the event loop early just because we have no active |
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171 | watchers, fixing a problem when embedding a kqueue loop |
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172 | that has active kernel events but no registered watchers |
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173 | (reported by blacksand blacksand). |
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174 | - correctly zero the idx values for arrays, so destroying and |
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175 | reinitialising the default loop actually works (patch by |
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176 | Malek Hadj-Ali). |
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177 | - implement ev_suspend and ev_resume. |
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178 | - new EV_CUSTOM revents flag for use by applications. |
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179 | - add documentation section about priorites. |
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180 | - add a glossary to the dcoumentation. |
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181 | - extend the ev_fork description slightly. |
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182 | - optimize a jump out of call_pending. |
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183 | |
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184 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
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185 | - fix a bug in event pipe creation on win32 that would cause a |
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186 | failed assertion on event loop creation (patch by Malek Hadj-Ali). |
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187 | - probe for CLOCK_REALTIME support at runtime as well and fall |
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188 | back to gettimeofday if there is an error, to support older |
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189 | operating systems with newer header files/libraries. |
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190 | - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL |
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191 | (default most everywhere), otherwise not. |
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192 | |
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193 | 3.52 Wed Jan 7 21:43:02 CET 2009 |
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194 | - fix compilation of select backend in fd_set mode when NFDBITS is |
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195 | missing (to get it to compile on QNX, reported by Rodrigo Campos). |
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196 | - better select-nfds handling when select backend is in fd_set mode. |
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197 | - diagnose fd_set overruns when select backend is in fd_set mode. |
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198 | - due to a thinko, instead of disabling everything but |
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199 | select on the borked OS X platform, everything but select was |
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200 | allowed (reported by Emanuele Giaquinta). |
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201 | - actually verify that local and remote port are matching in |
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202 | libev's socketpair emulation, which makes denial-of-service |
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203 | attacks harder (but not impossible - it's windows). Make sure |
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204 | it even works under vista, which thinks that getpeer/sockname |
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205 | should return fantasy port numbers. |
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206 | - include "libev" in all assertion messages for potentially |
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207 | clearer diagnostics. |
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208 | - event_get_version (libevent compatibility) returned |
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209 | a useless string instead of the expected version string |
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210 | (patch by W.C.A. Wijngaards). |
| 2 | |
211 | |
| 3 | 3.51 Wed Dec 24 23:00:11 CET 2008 |
212 | 3.51 Wed Dec 24 23:00:11 CET 2008 |
| 4 | - fix a bug where an inotify watcher was added twice, causing |
213 | - fix a bug where an inotify watcher was added twice, causing |
| 5 | freezes on hash collisions (reported and analysed by Graham Leggett). |
214 | freezes on hash collisions (reported and analysed by Graham Leggett). |
| 6 | - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use |
215 | - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use |
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… | |
| 52 | do similar changes for event.c. |
261 | do similar changes for event.c. |
| 53 | |
262 | |
| 54 | 3.45 Tue Oct 21 21:59:26 CEST 2008 |
263 | 3.45 Tue Oct 21 21:59:26 CEST 2008 |
| 55 | - disable inotify usage on linux <2.6.25, as it is broken |
264 | - disable inotify usage on linux <2.6.25, as it is broken |
| 56 | (reported by Yoann Vandoorselaere). |
265 | (reported by Yoann Vandoorselaere). |
| 57 | - ev_stat errornously would try to add inotify watchers |
266 | - ev_stat erroneously would try to add inotify watchers |
| 58 | even when inotify wasn't available (this should only |
267 | even when inotify wasn't available (this should only |
| 59 | have a performance impact). |
268 | have a performance impact). |
| 60 | - ev_once now passes both timeout and io to the callback if both |
269 | - ev_once now passes both timeout and io to the callback if both |
| 61 | occur concurrently, instead of giving timeouts precedence. |
270 | occur concurrently, instead of giving timeouts precedence. |
| 62 | - disable EV_USE_INOTIFY when sys/inotify.h is too old. |
271 | - disable EV_USE_INOTIFY when sys/inotify.h is too old. |
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| 130 | - enable inlining with gcc versions 2 and 3. |
339 | - enable inlining with gcc versions 2 and 3. |
| 131 | - work around broken poll implementations potentially |
340 | - work around broken poll implementations potentially |
| 132 | not clearing revents field in ev_poll (Brandon Black) |
341 | not clearing revents field in ev_poll (Brandon Black) |
| 133 | (no such systems are known at this time). |
342 | (no such systems are known at this time). |
| 134 | - work around a bug in realloc on openbsd and darwin, |
343 | - work around a bug in realloc on openbsd and darwin, |
| 135 | also makes the errornous valgrind complaints |
344 | also makes the erroneous valgrind complaints |
| 136 | go away (noted by various people). |
345 | go away (noted by various people). |
| 137 | - fix ev_async_pending, add c++ wrapper for ev_async |
346 | - fix ev_async_pending, add c++ wrapper for ev_async |
| 138 | (based on patch sent by Johannes Deisenhofer. |
347 | (based on patch sent by Johannes Deisenhofer). |
| 139 | - add sensible set method to ev::embed. |
348 | - add sensible set method to ev::embed. |
| 140 | - made integer constants type int in ev.h. |
349 | - made integer constants type int in ev.h. |
| 141 | |
350 | |
| 142 | 3.2 Wed Apr 2 17:11:19 CEST 2008 |
351 | 3.2 Wed Apr 2 17:11:19 CEST 2008 |
| 143 | - fix a 64 bit overflow issue in the select backend, |
352 | - fix a 64 bit overflow issue in the select backend, |
