--- IO-AIO/Changes 2005/07/11 01:03:17 1.8 +++ IO-AIO/Changes 2008/08/02 14:06:36 1.165 @@ -1,6 +1,302 @@ Revision history for IO::AIO - - added IO::AIO::flush. +TODO: better autoconf.pm that can return LIBS etc. +TODO: aio_cptree/mvtree +TODO: reduce condvar fairness: schedule hot-cache-threads first? +TODO: splice/tee/vmsplice/sync_file_range? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/) +TODO: aio_fcntl, at least for file-locking + +3.07 Sat Aug 2 16:06:13 CEST 2008 + - do not include LIBS in autoconf tests. + +3.06 Tue Jul 15 12:41:32 CEST 2008 + - move preadwritelock definition before it's first reference, + to make it compile again on broken platforms (they still exist) + or badly cofngiured perls (redhat...), reported by Rob Bloodgood. + +3.05 Thu Jun 19 23:23:52 CEST 2008 + - work around perl overriding readdir etc. with thread-unsafe + (sic!) versions. + +3.04 Wed Jun 18 01:35:38 CEST 2008 + - (libeio) fix eio_mknod, which confused it's arguments. + - (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this + is stupid. + - (libeio) fix eio__readahead prototype, patch by Jost Krieger. + - (libeio) fix a bug that could potentially cause IO::AIO + not to get initialised properly. + +3.03 Thu May 29 05:33:30 CEST 2008 + - (libeio) correctly call pthread_attr_destroy (). + - (libeio) work around broken bsd headers once more. + - reduce shared library size again by not including wrappers. + - max_outstanding could cause poll to enter a busy-waiting loop. + - document the new IO::AIO::poll_cb result value. + +3.02 Mon May 12 02:32:02 CEST 2008 + - fix a memory leak on aio_readlink. + - bring back working fchmod. + - nop and busy now set result to 0. + - set errno to ENOMEM when allocation fails. + +3.01 Sun May 11 03:07:03 CEST 2008 + - (libeio) make it compile on systems without readahead or readdir_r. + - (libeio) improve configure check for readahead availability. + - do not try to link against -lrt. + - use a separate configure script for IO::AIO (not the libeio one). + +3.0 Sun May 11 00:57:14 CEST 2008 + - added bin/treescan to the distribution. + - switched to using libeio. + - LOTS OF INCOMPATIBLE CHANGES: + - remove signal functionality, it is not worth the effort. + - max_outstanding no longer returns the previous number of requests. + - poll_cb no longer returns number of requests. + +2.62 Sat Apr 26 13:59:33 CEST 2008 + - port to solaris perls configured for old posix + (analysed by Jost Krieger). + - keep a reference to the perl filehandle object in aio_close, + so it doesn't get closed prematurely, leading to ugly races. + +2.61 Wed Apr 16 18:45:02 CEST 2008 + - fix treescan output duplication and improve output ordering. + also display files given on the commandline. + - use a different algorithm for aio_close that is faster + and probably has even lower chances of blocking. + - do our own stack memory management for threads - linux + allocates outrageous amounts of VM (not so bad unless you + use mlockall...), which severely limits the number of threads + on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN + and 4096 * sizeof (long) (usually this is 16..64k). + +2.6 Sun Mar 30 08:28:11 CEST 2008 + - added aio_sync. + - added aio_pathsync. + - fix prototypes of (void) functions. + +2.51 Sat Oct 6 16:04:54 CEST 2007 + - perlio isn't generally threadsafe, so aio_close could not work reliably. + aio_close now tries a safe hack that might not be that asynchronous + (see the manpage for details). + - discard callback return values as to not grow the stack endlessly + when poll_cb handles many requests without returning. + - minor code cleanups. + +2.5 Thu Oct 4 14:49:08 CEST 2007 + - replaced _fd2fh with faster xs code. + - aio_close will now try to do "the right thing" and thus might + work sensibly for the very first time. + +2.41 Mon Sep 24 21:28:21 CEST 2007 + - after fork, invest some work to make sure that the poll_fileno + stays stable (by dup2'ing the new fd over the old one), to make + it easier for programs/libs that don't control their forking + behaviour and cannot recreate their watchers. + +2.4 Sun Aug 5 18:44:22 CEST 2007 + - add aio_truncate, aio_chmod, aio_chown, aio_utime (linux + successfully demonstrated that you can block on futimes...). + - allow undef as fileoffset for aio_read/write and use read/write(2) + internally (useful for sockets or O_APPEND handles). + - allow undef for length in aio_write. + - negative dataoffsets work as expected now in aio_read/aio_write. + - use NV instead of UV for 32 bit perls and file offsets, as NVs + have a larger range then. + - shared code between BDB and IO::AIO. + - aio_busy was completely broken. now fixed. + - readahead emulation now returns something. + - correctly set errno to ENOSYS on unimplemented functions + (should never happen, though). + - large changes to make it partially compile and run on win32, + but win32 lacks too much functionality, and perl overrides way + too many functions with crashing versions. + +2.33 Tue Jan 23 23:55:41 CET 2007 + - fix install path (Andreas J. Koenig). + +2.32 Mon Jan 22 16:56:23 CET 2007 + - added aio_rmtree. + - wow, aio_mkdir was missing. + - aio_load did return undef on error, not -1. + - use prefixexp not prefix in autoconf.pm + (suggested by ... rt.cpan.org unreachable). + - avoid installing autoconf.pm. + +2.31 Sat Jan 6 03:46:02 CET 2007 + - added aio_load. + +2.3 Sat Dec 23 05:48:07 CET 2006 + - fix off-by-one bug in aio_read, causing memory corruption + or crashes. + +2.21 Fri Dec 22 05:03:38 CET 2006 + - minor doc updates. + - minor cleanups. + - IO::AIO::poll returns request count. + - undocumented and unfinished async-signal-reporting. + +2.2 Tue Oct 31 00:31:00 CET 2006 + - minor doc updates. + - added aio_readlink. + - properly zero-terminate aio_read buffer. + - fix aio_read/write with nonzero dataoffset. + - reduced size of aio request structure. + - better diagnostics when pathnames etc. are not byte-encoded; + do not leak request in that case, either. + +2.1 Sun Oct 29 02:01:57 CET 2006 + - INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by + IO::AIO::max_poll_reqs and IO::AIO::max_poll_time. + - fix a bug in aio_move where it would fail everytime + it would have to copy files manually. + - doc updates. + - start threads only on (very low) demand. + - end superfluous threads automatically after 10s idling. + - add IO::AIO::max_idle to control this. + - some tuning applied to random places. + - add aio_mknod. + +2.0 Thu Oct 26 18:27:58 CEST 2006 + - minor incompatibility: max_outstanding semantics have changed. + - major rewrite, consider all functionality EXPERIMENTAL. + - aio requests can be cancelled. + - callbacks can be (re-)set later. + - aio requests can choose between 9 priorities. + - add aio_group: aio requests can be grouped + into composite requests. + - generator interface for groups. + - add IO::AIO::poll_some. + - major documentation improvements. + - very minor bugfixes. + - add aio_nop for dummy requests. + - add aio_busy mainly for benchmarking and debugging. + - use "fast" mutexes on linux. + - use dynamic (and larger) buffers instead of + putting them onto the stack. + - optimise x86 and amd64 a bit. + - better error checking when ENOMEM. + - hopefully fix mem and dirp leaks on fork. + - warn about broken perl malloc. + - compiles on cygwin (but pread is broken on cygwin + which is not detected by autoconf, so you have to + edit autoconf/config.h yourself to enable emulation). + +1.8 Sat Jun 24 22:20:44 CEST 2006 + - add and/or document aio_rename, aio_link, aio_symlink and aio_move. + +1.73 Wed Mar 1 22:49:32 CET 2006 + - codename "jost" + - AIX/Solaris(?) aren't being helpful again, hardcode a value + for NAME_MAX and drive with your eyes closed (reported by + wcooley@nakedape.cc). + +1.72 Thu Feb 2 00:40:44 CET 2006 + - another minor bug in aio_scandir, again, the callback was called + twice when the directory can't be stat'ed. + +1.71 Mon Dec 26 20:20:03 CET 2005 + - grr, another minor bug in aio_scandir, this time resulting + in a runtime error. + +1.7 Mon Dec 26 19:29:48 CET 2005 + - aio_scandir errornously called callback twice in some cases. + - added AnyEvent example. + +1.61 Wed Sep 7 19:40:42 CEST 2005 + - no longer include $Config{libs}, as distros include too much + garbage in there that is not installed on typical systems + (for example, debian links perl against -lgdbm and many more + libraries despite perl not needing it, slowing down startup and + wasting memory). + +1.6 Tue Aug 30 17:44:44 CEST 2005 + - added aio_readdir, aio_scandir. + - added aio_sendfile, including sendfile emulation when sendfile + isn't available. Linux, FreeBSD and HP-UX might work (sendfilev + support is unavailable on my solaris 8 machine, but preliminary + code is there. What's lacking is configury stuff and testing...). + +1.5 Sat Aug 20 02:32:19 CEST 2005 + - create the aio threads on demand only (good after forking). + - somebody nagged about C89 compatibility, so this release should + be C89 compatible, but no guarantees for future ones. + - abort when the configure script fails. + +1.4 Wed Aug 17 08:07:27 CEST 2005 + - forgot to recreate the pipe after forking, this could cause + deadlocks. + +1.3 Wed Aug 17 07:25:54 CEST 2005 + - properly propagate exceptions from callbacks, instead of silently + eating them. + - use a different fork algorithm that avoids recursive callback + invocations and reduces fork latency in busy processes. + - fix a bug where the buffer scalar in aio_read got assigned the wrong + length after reading. + - fix a bug where the child would process some outstanding requests + from the parent. + - make a copy of the callback scalar, to avoid some very uncommon + (but valid) usages where the callback scalar changes. + - the callback was never freed in aio_read/aio_write. + - aio_read/aio_write will now set the readonly flag on the data + scalar for better error reporting. + +1.2 Wed Aug 17 01:22:58 CEST 2005 + - verified on cygwin, linux/amd64+ia32+alpha, solaris. + - use SvPVbyte for filenames now. You *need* to encode your strings to + the external filename encoding first. + - fix the bug where filehandles could leak (again). + - clarify freebsd situation: make it work and tell me how, or go away + with your underdocumented, broken and outdated OS. + - fork'ing should now be officially supported (where linux and + posix contradict each other, I followed posix). + - only call read() once per poll, not twice (speedup). + - new functions: aio_rmdir, aio_symlink. + - force callback arguments to be undef or a reference, for better + error catching. + +1.1 Sun Aug 7 05:27:23 CEST 2005 + - added configure script to detect availability of some calls. + (imperfect, as we cannot detect things like -lrt due to missing + feedback yet). + - emulate fdatasync via fsync, pread/pwrite via unsafe read/write + and readahead via manual reading on platforms lacking those. + - ported t/03_errors.t+framework by Brad Fitzpatrick + from Linux::AIO. + - removed XOPEN_SOURCE because stupid solaris 9 doesn't + compile with it enabled. Probably breaks others. Oh well. + - try to be more careful with errno on non-threaded perls. + - cygwins perl insisted on a matching open mode when morphing + the fd to an fh. + - convert sv's to "byte" encoding in aio_read/aio_write. Might + do that for pathnames, too, in the future, so make sure you + properly encode your pathnames. + +1.0 Fri Jul 22 10:43:30 CEST 2005 + - aio_open did not reliably deliver (open) filehandles. + - all aio_*-functions keep a reference to the filehandle so + it doesn't go away while the aio requests is working on it. + - disable warnings in AIO.pm. + +0.9 Wed Jul 20 23:55:04 CEST 2005 + - allow recursive calls to poll_cb, use less locking calls, too. + - fix the Gtk2-example in the SYNOPSIS. + - use pread/pwrite not pread64/pwrite64. this was simply a leftover + from Linux::AIO. + (found by compiling on cygwin. Unfortunately, cygwin declares but + does not implement pread/pwrite). + - only include on linux. + +0.5 Tue Jul 12 13:03:09 CEST 2005 + - removed #include , it's not portable, and we don't + need it anyway. + - link against -lrt, as it might contain goodies such as fdatasync, + and often aio_read, which we do not use yet, but it shouldn't hurt. + +0.4 Mon Jul 11 05:28:25 CEST 2005 + - added IO::AIO::flush, IO::AIO::poll. + - make callback argument optional for all calls. 0.3 Mon Jul 11 01:42:37 CEST 2005 - restructured manpage.