| 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_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 | TODO: document the special problem of signals around fork. |
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10 | TODO: store pid for each signal |
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11 | TODO: document file descriptor usage per loop |
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12 | TODO: store loop pid_t and compare isndie signal handler,store 1 for same, 2 for differign pid, clean up in loop_fork |
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13 | TODO: embed watchers need updating when fd changes |
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14 | TODO: document portbaility requirements for atomic pointer access |
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15 | TODO: possible cb aliasing? |
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16 | |
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17 | - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin). |
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18 | - (ecb) support m68k, m88k and sh (patch by Miod Vallat). |
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19 | - use a reasonable fallback for EV_NSIG instead of erroring out |
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20 | when we can't detect the signal set size. |
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21 | - in the absence of autoconf, do not use the clock syscall |
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22 | on glibc >= 2.17 (avoids the syscall AND -lrt on systems |
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23 | doing clock_gettime in userspace). |
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24 | - ensure extern "C" function pointers are used for externally-visible |
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25 | loop callbacks (not watcher callbacks yet). |
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26 | |
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27 | 4.15 Fri Mar 1 12:04:50 CET 2013 |
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28 | - destroying a non-default loop would stop the global waitpid |
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29 | watcher (Denis Bilenko). |
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30 | - queueing pending watchers of higher priority from a watcher now invokes |
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31 | them in a timely fashion (reported by Denis Bilenko). |
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32 | - add throw() to all libev functions that cannot throw exceptions, for |
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33 | further code size decrease when compiling for C++. |
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34 | - add throw () to callbacks that must not throw exceptions (allocator, |
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35 | syserr, loop acquire/release, periodic reschedule cbs). |
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36 | - fix event_base_loop return code, add event_get_callback, event_base_new, |
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37 | event_base_get_method calls to improve libevent 1.x emulation and add |
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38 | some libevent 2.x functionality (based on a patch by Jeff Davey). |
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39 | - add more memory fences to fix a bug reported by Jeff Davey. Better |
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40 | be overfenced than underprotected. |
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41 | - ev_run now returns a boolean status (true meaning watchers are |
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42 | still active). |
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43 | - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with |
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44 | libev's EV_ERROR (reported by 191919). |
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45 | - (ecb) add memory fence support for xlC (Darin McBride). |
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46 | - (ecb) add memory fence support for gcc-mips (Anton Kirilov). |
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47 | - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber). |
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48 | - work around some kernels losing file descriptors by leaking |
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49 | the kqueue descriptor in the child. |
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50 | - work around linux inotify not reporting IN_ATTRIB changes for directories |
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51 | in many cases. |
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52 | - include sys/syscall.h instead of plain syscall.h. |
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53 | - check for io watcher loops in ev_verify, check for the most |
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54 | common reported usage bug in ev_io_start. |
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55 | - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET. |
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56 | - always use WSASend/WSARecv directly on windows, hoping that this |
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57 | works in all cases (unlike read/write/send/recv...). |
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58 | - try to detect signals around a fork faster (test program by |
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59 | Denis Bilenko). |
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60 | - work around recent glibc versions that leak memory in realloc. |
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61 | - rename ev::embed::set to ev::embed::set_embed to avoid clashing |
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62 | the watcher base set (loop) method. |
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63 | - rewrite the async/signal pipe logic to always keep a valid fd, which |
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64 | simplifies (and hopefully correctifies :) the race checking |
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65 | on fork, at the cost of one extra fd. |
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66 | - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of |
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67 | inotify-supporting filesystems. |
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68 | - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf |
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69 | versions ignore it before |
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70 | (https://bugzilla.redhat.com/show_bug.cgi?id=908096). |
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71 | - add some untested android support. |
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72 | - enum expressions must be of type int (reported by Juan Pablo L). |
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73 | |
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74 | 4.11 Sat Feb 4 19:52:39 CET 2012 |
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75 | - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as |
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76 | was documented already, but not implemented in the repeating case. |
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77 | - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS. |
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78 | - fix a race where the workaround against the epoll fork bugs |
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79 | caused signals to not be handled anymore. |
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80 | - correct backend_fudge for most backends, and implement a windows |
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81 | specific workaround to avoid looping because we call both |
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82 | select and Sleep, both with different time resolutions. |
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83 | - document range and guarantees of ev_sleep. |
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84 | - document reasonable ranges for periodics interval and offset. |
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85 | - rename backend_fudge to backend_mintime to avoid future confusion :) |
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86 | - change the default periodic reschedule function to hopefully be more |
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87 | exact and correct even in corner cases or in the far future. |
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88 | - do not rely on -lm anymore: use it when available but use our |
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89 | own floor () if it is missing. This should make it easier to embed, |
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90 | as no external libraries are required. |
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91 | - strategically import macros from libecb and mark rarely-used functions |
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92 | as cache-cold (saving almost 2k code size on typical amd64 setups). |
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93 | - add Symbols.ev and Symbols.event files, that were missing. |
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94 | - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now). |
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95 | - fix #3 "be smart about timeouts" to not "deadlock" when |
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96 | timeout == now, also improve the section overall. |
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97 | - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom. |
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98 | - support new EV_API_STATIC mode to make all libev symbols |
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99 | static. |
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100 | - supply default CFLAGS of -g -O3 with gcc when original CFLAGS |
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101 | were empty. |
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102 | |
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103 | 4.04 Wed Feb 16 09:01:51 CET 2011 |
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104 | - fix two problems in the native win32 backend, where reuse of fd's |
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105 | with different underlying handles caused handles not to be removed |
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106 | or added to the select set (analyzed and tested by Bert Belder). |
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107 | - do no rely on ceil() in ev_e?poll.c. |
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108 | - backport libev to HP-UX versions before 11 v3. |
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109 | - configure did not detect nanosleep and clock_gettime properly when |
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110 | they are available in the libc (as opposed to -lrt). |
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111 | |
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112 | 4.03 Tue Jan 11 14:37:25 CET 2011 |
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113 | - officially support polling files with all backends. |
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114 | - support files, /dev/zero etc. the same way as select in the epoll |
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115 | backend, by generating events on our own. |
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116 | - ports backend: work around solaris bug 6874410 and many related ones |
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117 | (EINTR, maybe more), with no performance loss (note that the solaris |
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118 | bug report is actually wrong, reality is far more bizarre and broken |
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119 | than that). |
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120 | - define EV_READ/EV_WRITE as macros in event.h, as some programs use |
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121 | #ifdef to test for them. |
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122 | - new (experimental) function: ev_feed_signal. |
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123 | - new (to become default) EVFLAG_NOSIGMASK flag. |
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124 | - new EVBACKEND_MASK symbol. |
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125 | - updated COMMON IDIOMS SECTION. |
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126 | |
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127 | 4.01 Fri Nov 5 21:51:29 CET 2010 |
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128 | - automake fucked it up, apparently, --add-missing -f is not quite enough |
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129 | to make it update its files, so 4.00 didn't install ev++.h and |
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130 | event.h on make install. grrr. |
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131 | - ev_loop(count|depth) didn't return anything (Robin Haberkorn). |
| 3 | - change EV_UNDEF to 0xffffffff to silence some overzealous compilers. |
132 | - change EV_UNDEF to 0xffffffff to silence some overzealous compilers. |
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133 | - use "(libev) " prefix for all libev error messages now. |
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134 | |
| 5 | 4.00 Mon Oct 25 12:32:12 CEST 2010 |
135 | 4.00 Mon Oct 25 12:32:12 CEST 2010 |
| 6 | - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading. |
136 | - "PORTING FROM LIBEV 3.X TO 4.X" (in ev.pod) is recommended reading. |
| 7 | - ev_embed_stop did not correctly stop the watcher (very good |
137 | - ev_embed_stop did not correctly stop the watcher (very good |
| 8 | testcase by Vladimir Timofeev). |
138 | testcase by Vladimir Timofeev). |
| … | |
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| 62 | catch race conditions, but the users have spoken. |
192 | catch race conditions, but the users have spoken. |
| 63 | - point out the unspecified signal mask in the documentation, and |
193 | - point out the unspecified signal mask in the documentation, and |
| 64 | that this is a race condition regardless of EV_SIGNALFD. |
194 | that this is a race condition regardless of EV_SIGNALFD. |
| 65 | - backport inotify code to C89. |
195 | - backport inotify code to C89. |
| 66 | - inotify file descriptors could leak into child processes. |
196 | - inotify file descriptors could leak into child processes. |
| 67 | - ev_stat watchers could keep an errornous extra ref on the loop, |
197 | - ev_stat watchers could keep an erroneous extra ref on the loop, |
| 68 | preventing exit when unregistering all watchers (testcases |
198 | preventing exit when unregistering all watchers (testcases |
| 69 | provided by ry@tinyclouds.org). |
199 | provided by ry@tinyclouds.org). |
| 70 | - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration |
200 | - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration |
| 71 | symbols to make it easier for apps to do their own fd management. |
201 | symbols to make it easier for apps to do their own fd management. |
| 72 | - support EV_IDLE_ENABLE being disabled in ev++.h |
202 | - support EV_IDLE_ENABLE being disabled in ev++.h |
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| 130 | - correctly zero the idx values for arrays, so destroying and |
260 | - correctly zero the idx values for arrays, so destroying and |
| 131 | reinitialising the default loop actually works (patch by |
261 | reinitialising the default loop actually works (patch by |
| 132 | Malek Hadj-Ali). |
262 | Malek Hadj-Ali). |
| 133 | - implement ev_suspend and ev_resume. |
263 | - implement ev_suspend and ev_resume. |
| 134 | - new EV_CUSTOM revents flag for use by applications. |
264 | - new EV_CUSTOM revents flag for use by applications. |
| 135 | - add documentation section about priorites. |
265 | - add documentation section about priorities. |
| 136 | - add a glossary to the dcoumentation. |
266 | - add a glossary to the documentation. |
| 137 | - extend the ev_fork description slightly. |
267 | - extend the ev_fork description slightly. |
| 138 | - optimize a jump out of call_pending. |
268 | - optimize a jump out of call_pending. |
| 139 | |
269 | |
| 140 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
270 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
| 141 | - fix a bug in event pipe creation on win32 that would cause a |
271 | - fix a bug in event pipe creation on win32 that would cause a |
