[sync] 4.27

cvs-vers

@@ -1,35 +1,37 @@
-Changes:1.325
+Changes:1.342
 LICENSE:1.11
 Makefile.am:1.9
-README:1.21
+README:1.22
 README.embed:1.29
 Symbols.ev:1.14
 Symbols.event:1.4
 autogen.sh:1.3
-configure.ac:1.43
+configure.ac:1.44
 ev++.C:1.3
 ev++.h:1.65
 ev.3:1.99
-ev.c:1.489
-ev.h:1.190
+ev.c:1.508
+ev.h:1.196
 ev.html:1.80
 ev.m4:1.2
-ev.pod:1.446
-ev_epoll.c:1.72
-ev_kqueue.c:1.56
-ev_poll.c:1.40
-ev_port.c:1.29
-ev_select.c:1.56
-ev_vars.h:1.59
-ev_win32.c:1.18
-ev_wrap.h:1.38
+ev.pod:1.456
+ev_epoll.c:1.81
+ev_iouring.c:1.2
+ev_kqueue.c:1.60
+ev_linuxaio.c:1.50
+ev_poll.c:1.47
+ev_port.c:1.32
+ev_select.c:1.57
+ev_vars.h:1.65
+ev_win32.c:1.20
+ev_wrap.h:1.42
 evdns.c:1.23
 evdns.h:1.2
 event.c:1.52
 event.h:1.26
 event_compat.h:1.8
 import_libevent:1.29
-libev.m4:1.16
+libev.m4:1.17
 update_ev_c:1.2
 update_ev_wrap:1.6
 update_symbols:1.1

src/Changes

@@ -1,12 +1,50 @@
 Revision history for libev, a high-performance and full-featured event loop.
 
+TODO: revisit 59.x timer in the light of modern powersaving
+TODO: maybe use timerfd to detect time jumps on linux
+TODO: document EV_TSTAMP_T
+	- linuxaio backend resulted in random memory corruption
+          when loop is forked.
+        - linuxaio backend might have tried to cancel an iocb
+          multiple times (was unable to trigger this).
+        - linuxaio backend now employs a generation counter to
+          avoid handling spurious events from cancelled requests.
+	- io_cancel can return EINTR, deal with it. also, assume
+          io_submit also returns EINTR.
+        - fix some other minor bugs in linuxaio backend.
+        - ev_tstamp type can now be overriden by defining EV_TSTAMP_T.
+        - cleanup: replace expect_true/false and noinline by their
+          libecb counterparts.
+        - move syscall infrastructure from ev_linuxaio.c to ev.c.
+        - prepare io_uring integration.
+        - tweak ev_floor.
+        - epoll, poll, win32 Sleep and other places that use millisecond
+          reslution now all try to round up times.
+
+4.27 Thu Jun 27 22:43:44 CEST 2019
+	- linux aio backend almost completely rewritten to work around its
+          limitations.
+        - linux aio backend now requires linux 4.19+.
+        - epoll backend now mandatory for linux aio backend.
+        - fail assertions more aggressively on invalid fd's detected
+          in the event loop, do not just silently fd_kill in case of
+          user error.
+        - ev_io_start/ev_io_stop now verify the watcher fd using
+          a syscall when EV_VERIFY is 2 or higher.
+
+4.26 (EV only)
+	- update to libecb 0x00010006.
+	- new experimental linux aio backend (linux 4.18+).
 	- removed redundant 0-ptr check in ev_once.
         - updated/extended ev_set_allocator documentation.
+        - replaced EMPTY2 macro by array_needsize_noinit.
+        - minor code cleanups.
+        - epoll backend now uses epoll_create1 also after fork.
 
 4.25 Fri Dec 21 07:49:20 CET 2018
         - INCOMPATIBLE CHANGE: EV_THROW was renamed to EV_NOEXCEPT
           (EV_THROW still provided) and now uses noexcept on C++11 or newer.
-	- move the darwin select workaround highe rin ev.c, as newer versions of
+	- move the darwin select workaround higher in ev.c, as newer versions of
           darwin managed to break their broken select even more.
 	- ANDROID => __ANDROID__ (reported by [email protected]).
         - disable epoll_create1 on android because it has broken header files

src/README

@@ -18,7 +18,8 @@ ABOUT
    - extensive and detailed, readable documentation (not doxygen garbage).
    - fully supports fork, can detect fork in various ways and automatically
      re-arms kernel mechanisms that do not support fork.
-   - highly optimised select, poll, epoll, kqueue and event ports backends.
+   - highly optimised select, poll, linux epoll, linux aio, bsd kqueue
+     and solaris event ports backends.
    - filesystem object (path) watching (with optional linux inotify support).
    - wallclock-based times (using absolute time, cron-like).
    - relative timers/timeouts (handle time jumps).

src/configure.ac

@@ -1,5 +1,5 @@
 dnl also update ev.h!
-AC_INIT([libev], [4.25])
+AC_INIT([libev], [4.27])
 
 orig_CFLAGS="$CFLAGS"