| 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: revisit 59.x timer in the light of modern powersaving |
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4 | TODO: maybe use timerfd to detect time jumps on linux |
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5 | TODO: document EV_TSTAMP_T |
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6 | |
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7 | 4.28 (EV only) |
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8 | - linuxaio backend resulted in random memory corruption |
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9 | when loop is forked. |
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10 | - linuxaio backend might have tried to cancel an iocb |
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11 | multiple times (was unable to trigger this). |
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12 | - linuxaio backend now employs a generation counter to |
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13 | avoid handling spurious events from cancelled requests. |
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14 | - io_cancel can return EINTR, deal with it. also, assume |
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15 | io_submit also returns EINTR. |
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16 | - fix some other minor bugs in linuxaio backend. |
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17 | - ev_tstamp type can now be overriden by defining EV_TSTAMP_T. |
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18 | - cleanup: replace expect_true/false and noinline by their |
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19 | libecb counterparts. |
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20 | - move syscall infrastructure from ev_linuxaio.c to ev.c. |
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21 | - prepare io_uring integration. |
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22 | - tweak ev_floor. |
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23 | - epoll, poll, win32 Sleep and other places that use millisecond |
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24 | reslution now all try to round up times. |
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25 | - solaris port backend didn't compile. |
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26 | - abstract time constants into their macros, for more flexibility. |
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27 | |
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28 | 4.27 Thu Jun 27 22:43:44 CEST 2019 |
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29 | - linux aio backend almost completely rewritten to work around its |
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30 | limitations. |
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31 | - linux aio backend now requires linux 4.19+. |
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32 | - epoll backend now mandatory for linux aio backend. |
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33 | - fail assertions more aggressively on invalid fd's detected |
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34 | in the event loop, do not just silently fd_kill in case of |
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35 | user error. |
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36 | - ev_io_start/ev_io_stop now verify the watcher fd using |
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37 | a syscall when EV_VERIFY is 2 or higher. |
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38 | |
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39 | 4.26 (EV only) |
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40 | - update to libecb 0x00010006. |
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41 | - new experimental linux aio backend (linux 4.18+). |
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42 | - removed redundant 0-ptr check in ev_once. |
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43 | - updated/extended ev_set_allocator documentation. |
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44 | - replaced EMPTY2 macro by array_needsize_noinit. |
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45 | - minor code cleanups. |
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46 | - epoll backend now uses epoll_create1 also after fork. |
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47 | |
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48 | 4.25 Fri Dec 21 07:49:20 CET 2018 |
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49 | - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT |
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50 | (EV_THROW still provided) and now uses noexcept on C++11 or newer. |
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51 | - move the darwin select workaround higher in ev.c, as newer versions of |
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52 | darwin managed to break their broken select even more. |
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53 | - ANDROID => __ANDROID__ (reported by enh@google.com). |
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54 | - disable epoll_create1 on android because it has broken header files |
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55 | and google is unwilling to fix them (reported by enh@google.com). |
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56 | - avoid a minor compilation warning on win32. |
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57 | - c++: remove deprecated dynamic throw() specifications. |
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58 | - c++: improve the (unsupported) bad_loop exception class. |
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59 | - backport perl ev_periodic example to C, untested. |
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60 | - update libecb, biggets change is to include a memory fence |
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61 | in ECB_MEMORY_FENCE_RELEASE on x86/amd64. |
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62 | - minor autoconf/automake modernisation. |
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63 | |
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64 | 4.24 Wed Dec 28 05:19:55 CET 2016 |
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65 | - bump version to 4.24, as the release tarball inexplicably |
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66 | didn't have the right version in ev.h, even though the cvs-tagged |
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67 | version did have the right one (reported by Ales Teska). |
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68 | |
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69 | 4.23 Wed Nov 16 18:23:41 CET 2016 |
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70 | - move some declarations at the beginning to help certain retarded |
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71 | microsoft compilers, even though their documentation claims |
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72 | otherwise (reported by Ruslan Osmanov). |
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73 | |
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74 | 4.22 Sun Dec 20 22:11:50 CET 2015 |
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75 | - when epoll detects unremovable fds in the fd set, rebuild |
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76 | only the epoll descriptor, not the signal pipe, to avoid |
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77 | SIGPIPE in ev_async_send. This doesn't solve it on fork, |
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78 | so document what needs to be done in ev_loop_fork |
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79 | (analyzed by Benjamin Mahler). |
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80 | - remove superfluous sys/timeb.h include on win32 |
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81 | (analyzed by Jason Madden). |
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82 | - updated libecb. |
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83 | |
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84 | 4.20 Sat Jun 20 13:01:43 CEST 2015 |
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85 | - prefer noexcept over throw () with C++ 11. |
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86 | - update ecb.h due to incompatibilities with c11. |
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87 | - fix a potential aliasing issue when reading and writing |
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88 | watcher callbacks. |
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89 | |
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90 | 4.19 Thu Sep 25 08:18:25 CEST 2014 |
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91 | - ev.h wasn't valid C++ anymore, which tripped compilers other than |
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92 | clang, msvc or gcc (analyzed by Raphael 'kena' Poss). Unfortunately, |
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93 | C++ doesn't support typedefs for function pointers fully, so the affected |
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94 | declarations have to spell out the types each time. |
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95 | - when not using autoconf, tighten the check for clock_gettime and related |
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96 | functionality. |
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97 | |
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98 | 4.18 Fri Sep 5 17:55:26 CEST 2014 |
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99 | - events on files were not always generated properly with the |
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100 | epoll backend (testcase by Assaf Inbal). |
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101 | - mark event pipe fd as cloexec after a fork (analyzed by Sami Farin). |
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102 | - (ecb) support m68k, m88k and sh (patch by Miod Vallat). |
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103 | - use a reasonable fallback for EV_NSIG instead of erroring out |
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104 | when we can't detect the signal set size. |
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105 | - in the absence of autoconf, do not use the clock syscall |
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106 | on glibc >= 2.17 (avoids the syscall AND -lrt on systems |
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107 | doing clock_gettime in userspace). |
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108 | - ensure extern "C" function pointers are used for externally-visible |
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109 | loop callbacks (not watcher callbacks yet). |
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110 | - (ecb) work around memory barriers and volatile apparently both being |
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111 | broken in visual studio 2008 and later (analysed and patch by Nicolas Noble). |
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112 | |
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113 | 4.15 Fri Mar 1 12:04:50 CET 2013 |
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114 | - destroying a non-default loop would stop the global waitpid |
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115 | watcher (Denis Bilenko). |
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116 | - queueing pending watchers of higher priority from a watcher now invokes |
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117 | them in a timely fashion (reported by Denis Bilenko). |
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118 | - add throw() to all libev functions that cannot throw exceptions, for |
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119 | further code size decrease when compiling for C++. |
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120 | - add throw () to callbacks that must not throw exceptions (allocator, |
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121 | syserr, loop acquire/release, periodic reschedule cbs). |
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122 | - fix event_base_loop return code, add event_get_callback, event_base_new, |
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123 | event_base_get_method calls to improve libevent 1.x emulation and add |
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124 | some libevent 2.x functionality (based on a patch by Jeff Davey). |
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125 | - add more memory fences to fix a bug reported by Jeff Davey. Better |
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126 | be overfenced than underprotected. |
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127 | - ev_run now returns a boolean status (true meaning watchers are |
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128 | still active). |
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129 | - ev_once: undef EV_ERROR in ev_kqueue.c, to avoid clashing with |
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130 | libev's EV_ERROR (reported by 191919). |
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131 | - (ecb) add memory fence support for xlC (Darin McBride). |
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132 | - (ecb) add memory fence support for gcc-mips (Anton Kirilov). |
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133 | - (ecb) add memory fence support for gcc-alpha (Christian Weisgerber). |
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134 | - work around some kernels losing file descriptors by leaking |
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135 | the kqueue descriptor in the child. |
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136 | - work around linux inotify not reporting IN_ATTRIB changes for directories |
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137 | in many cases. |
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138 | - include sys/syscall.h instead of plain syscall.h. |
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139 | - check for io watcher loops in ev_verify, check for the most |
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140 | common reported usage bug in ev_io_start. |
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141 | - choose socket vs. WSASocket at compiletime using EV_USE_WSASOCKET. |
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142 | - always use WSASend/WSARecv directly on windows, hoping that this |
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143 | works in all cases (unlike read/write/send/recv...). |
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144 | - try to detect signals around a fork faster (test program by |
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145 | Denis Bilenko). |
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146 | - work around recent glibc versions that leak memory in realloc. |
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147 | - rename ev::embed::set to ev::embed::set_embed to avoid clashing |
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148 | the watcher base set (loop) method. |
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149 | - rewrite the async/signal pipe logic to always keep a valid fd, which |
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150 | simplifies (and hopefully correctifies :) the race checking |
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151 | on fork, at the cost of one extra fd. |
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152 | - add fat, msdos, jffs2, ramfs, ntfs and btrfs to the list of |
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153 | inotify-supporting filesystems. |
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154 | - move orig_CFLAGS assignment to after AC_INIT, as newer autoconf |
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155 | versions ignore it before |
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156 | (https://bugzilla.redhat.com/show_bug.cgi?id=908096). |
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157 | - add some untested android support. |
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158 | - enum expressions must be of type int (reported by Juan Pablo L). |
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159 | |
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160 | 4.11 Sat Feb 4 19:52:39 CET 2012 |
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161 | - INCOMPATIBLE CHANGE: ev_timer_again now clears the pending status, as |
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162 | was documented already, but not implemented in the repeating case. |
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163 | - new compiletime symbols: EV_NO_SMP and EV_NO_THREADS. |
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164 | - fix a race where the workaround against the epoll fork bugs |
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165 | caused signals to not be handled anymore. |
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166 | - correct backend_fudge for most backends, and implement a windows |
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167 | specific workaround to avoid looping because we call both |
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168 | select and Sleep, both with different time resolutions. |
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169 | - document range and guarantees of ev_sleep. |
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170 | - document reasonable ranges for periodics interval and offset. |
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171 | - rename backend_fudge to backend_mintime to avoid future confusion :) |
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172 | - change the default periodic reschedule function to hopefully be more |
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173 | exact and correct even in corner cases or in the far future. |
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174 | - do not rely on -lm anymore: use it when available but use our |
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175 | own floor () if it is missing. This should make it easier to embed, |
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176 | as no external libraries are required. |
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177 | - strategically import macros from libecb and mark rarely-used functions |
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178 | as cache-cold (saving almost 2k code size on typical amd64 setups). |
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179 | - add Symbols.ev and Symbols.event files, that were missing. |
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180 | - fix backend_mintime value for epoll (was 1/1024, is 1/1000 now). |
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181 | - fix #3 "be smart about timeouts" to not "deadlock" when |
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182 | timeout == now, also improve the section overall. |
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183 | - avoid "AVOIDING FINISHING BEFORE RETURNING" idiom. |
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184 | - support new EV_API_STATIC mode to make all libev symbols |
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185 | static. |
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186 | - supply default CFLAGS of -g -O3 with gcc when original CFLAGS |
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187 | were empty. |
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188 | |
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189 | 4.04 Wed Feb 16 09:01:51 CET 2011 |
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190 | - fix two problems in the native win32 backend, where reuse of fd's |
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191 | with different underlying handles caused handles not to be removed |
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192 | or added to the select set (analyzed and tested by Bert Belder). |
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193 | - do no rely on ceil() in ev_e?poll.c. |
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194 | - backport libev to HP-UX versions before 11 v3. |
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195 | - configure did not detect nanosleep and clock_gettime properly when |
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196 | they are available in the libc (as opposed to -lrt). |
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197 | |
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198 | 4.03 Tue Jan 11 14:37:25 CET 2011 |
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199 | - officially support polling files with all backends. |
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200 | - support files, /dev/zero etc. the same way as select in the epoll |
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201 | backend, by generating events on our own. |
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202 | - ports backend: work around solaris bug 6874410 and many related ones |
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203 | (EINTR, maybe more), with no performance loss (note that the solaris |
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204 | bug report is actually wrong, reality is far more bizarre and broken |
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205 | than that). |
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206 | - define EV_READ/EV_WRITE as macros in event.h, as some programs use |
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207 | #ifdef to test for them. |
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208 | - new (experimental) function: ev_feed_signal. |
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209 | - new (to become default) EVFLAG_NOSIGMASK flag. |
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210 | - new EVBACKEND_MASK symbol. |
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211 | - updated COMMON IDIOMS SECTION. |
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212 | |
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213 | 4.01 Fri Nov 5 21:51:29 CET 2010 |
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214 | - automake fucked it up, apparently, --add-missing -f is not quite enough |
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215 | to make it update its files, so 4.00 didn't install ev++.h and |
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216 | event.h on make install. grrr. |
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217 | - ev_loop(count|depth) didn't return anything (Robin Haberkorn). |
| 3 | - change EV_UNDEF to 0xffffffff to silence some overzealous compilers. |
218 | - change EV_UNDEF to 0xffffffff to silence some overzealous compilers. |
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219 | - use "(libev) " prefix for all libev error messages now. |
| 4 | |
220 | |
| 5 | 4.00 Mon Oct 25 12:32:12 CEST 2010 |
221 | 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. |
222 | - "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 |
223 | - ev_embed_stop did not correctly stop the watcher (very good |
| 8 | testcase by Vladimir Timofeev). |
224 | testcase by Vladimir Timofeev). |
| … | |
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| 62 | catch race conditions, but the users have spoken. |
278 | catch race conditions, but the users have spoken. |
| 63 | - point out the unspecified signal mask in the documentation, and |
279 | - point out the unspecified signal mask in the documentation, and |
| 64 | that this is a race condition regardless of EV_SIGNALFD. |
280 | that this is a race condition regardless of EV_SIGNALFD. |
| 65 | - backport inotify code to C89. |
281 | - backport inotify code to C89. |
| 66 | - inotify file descriptors could leak into child processes. |
282 | - inotify file descriptors could leak into child processes. |
| 67 | - ev_stat watchers could keep an errornous extra ref on the loop, |
283 | - ev_stat watchers could keep an erroneous extra ref on the loop, |
| 68 | preventing exit when unregistering all watchers (testcases |
284 | preventing exit when unregistering all watchers (testcases |
| 69 | provided by ry@tinyclouds.org). |
285 | provided by ry@tinyclouds.org). |
| 70 | - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration |
286 | - 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. |
287 | symbols to make it easier for apps to do their own fd management. |
| 72 | - support EV_IDLE_ENABLE being disabled in ev++.h |
288 | - support EV_IDLE_ENABLE being disabled in ev++.h |
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| 130 | - correctly zero the idx values for arrays, so destroying and |
346 | - correctly zero the idx values for arrays, so destroying and |
| 131 | reinitialising the default loop actually works (patch by |
347 | reinitialising the default loop actually works (patch by |
| 132 | Malek Hadj-Ali). |
348 | Malek Hadj-Ali). |
| 133 | - implement ev_suspend and ev_resume. |
349 | - implement ev_suspend and ev_resume. |
| 134 | - new EV_CUSTOM revents flag for use by applications. |
350 | - new EV_CUSTOM revents flag for use by applications. |
| 135 | - add documentation section about priorites. |
351 | - add documentation section about priorities. |
| 136 | - add a glossary to the dcoumentation. |
352 | - add a glossary to the documentation. |
| 137 | - extend the ev_fork description slightly. |
353 | - extend the ev_fork description slightly. |
| 138 | - optimize a jump out of call_pending. |
354 | - optimize a jump out of call_pending. |
| 139 | |
355 | |
| 140 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
356 | 3.53 Sun Feb 15 02:38:20 CET 2009 |
| 141 | - fix a bug in event pipe creation on win32 that would cause a |
357 | - fix a bug in event pipe creation on win32 that would cause a |
