[ViewVC] Annotation of: cvs/IO-AIO/Changes

Revision history for IO::AIO

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? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
TODO: aio_fcntl, at least for file-locking
TODO: fallocate, if it wouldn't be so useless.

3.261 Wed Jul  1 10:11:51 CEST 2009
        - more OS X workarounds (patch by Tokuhiro Matsuno).

3.26 Tue Jun 30 09:33:26 CEST 2009
        - os x of course claims posix 2008 but lacks posix_fadvise. try to work
          around this horribly broken OS in a somewhat hackish way. might help
          other os's too.

3.25 Sat Jun 27 05:18:26 CEST 2009
        - added IO::AIO::fadvise and IO::AIO::sendfile.
        - (libeio) replaced quicksort+insertion sort by a tuned radix
          sort + insertion sort, resulting in comparable runtime (usually
          faster) to the old version, but without any ill side effects on
          degenerated (for quicksort) data.
        - (libeio) correctly sort dirs by inodes if we have perfect type
          knowledge and DIRS_FIRST is used.
        - (libeio) internally the wrong DT_* constants were used, but no
          known system has differing EIO_DT_*/DT_* values, so not an issue.
        - removed a (harmless) assert that was left over on the code
          but should not have been.
        - use more correct types (change IO length from IV to VAL64,
          which makes a difference on systems without 64 bit perls).

3.23 Sat Jun 13 16:57:58 CEST 2009
        - fix off-by-one bug in aio_readdir that was introduced in the
          rushed 3.22 release.

3.22 Sat Jun 13 15:32:40 CEST 2009
        - speed up readdirx sort algorithm slightly.
        - bin/treescan was missing from distro tarball.

3.21 Fri Jun 12 18:45:53 CEST 2009
        - new options --dirs and --files for treescan.
        - install bin/treescan by default.
        - (libeio) aio_readdir can now be cancelled while executing.
        - fix a printf format string for 64 bit systems (could lead
          to problems on big endian 64 bit systems).
        - do not use qsort() but our own algorithm: glibc initialises
          the whole locale and I/O subsystem inside qsort, causing
          a stack overflow on 32 bit machines. The new sort uses much less
          stack and is more than twice as fast in typical situations.

3.2  Sun Jun  7 20:30:05 CEST 2009
        - (libeio) pwrite emulation was even more flawed than intended and did
          not restore the file offset.
        - add aio_readdirx, which can return inode and filetype and sort
          the names in various ways.
        - unfortunately, utime, chmod, chown on an open file that has just
          been written can easily block, which caused aio_copy to block the
          process. no more!
        - no longer rely on dst path in aio_copy when futime is available.

3.19 Tue Apr 21 22:05:21 CEST 2009
        - more perl 5.10 workarounds for aio_read and write.
        - aio_write no longer modifies the sv (if possible).
        - aio_read now works correctly with magic values.

3.18 Sun Apr 19 21:17:32 CEST 2009
        - better diagnostics when some aio_* functions get passed an illegal fh.
        - try to avoid crashes due to incompatible 5.10 API changes. grmbl.

3.17 Thu Nov 20 08:45:36 CET 2008
        - (libeio) added aio_sync_file_range (untested).
        - add aio_busy to @IO::AIO::AIO_REQ.

3.16 Wed Oct 22 18:28:01 CEST 2008
        - use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
          part to improve portability to perl 5.8 (reported by szymon).

3.15 Mon Oct 13 00:39:55 CEST 2008
        - automatic removal of feeders was broken.
        - (libeio) use a more robust method to detect whether a feeder
          has added something to the group or not.

3.1  Thu Oct  2 13:34:40 CEST 2008
        - pre-deref the passed callback object, for increased speed
          and decreased memory usage.
        - call on_next_submit callback even for aio_group - impact unknown,
          but seems more correct.
        - $req->cb now returns the original callback.
        - (libeio) pass EIO_GROUP/aio_group requests through the queue without
          requiring a thread switch.
        - (libeio) status code of aio_futime and aio_utime was always passed 0.
        - do some other µ-optimisations.

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 <sys/syscall.h> on linux.

0.5  Tue Jul 12 13:03:09 CEST 2005
        - removed #include <endian.h>, 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.
        - added SYNOPSIS with examples for Event, Glib, Tk.
        - remove explicit context support so I don't have to maintain
          it for threaded perls (i.e. it should work now :).

0.2  Sun Jul 10 22:57:12 CEST 2005
        - return immediately from poll_wait if nreqs==0.
        - get rid of the request pipe and use faster thread-thread
          communications for most requests and responses.

0.1
        - cloned from Linux::AIO, which is very similar.

Revision:	1.201
Committed:	Wed Jul 1 08:12:18 2009 UTC (14 years, 11 months ago) by root
Branch:	MAIN
CVS Tags:	rel-3_261
Changes since 1.200:	+1 -0 lines
Log Message:	3.261
#	User	Rev	Content
1	root	1.31	Revision history for IO::AIO
2	root	1.30
3	root	1.59	TODO: better autoconf.pm that can return LIBS etc.
4	root	1.114	TODO: aio_cptree/mvtree
5	root	1.106	TODO: reduce condvar fairness: schedule hot-cache-threads first?
6	root	1.176	TODO: splice/tee/vmsplice? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
7	root	1.136	TODO: aio_fcntl, at least for file-locking
8	root	1.196	TODO: fallocate, if it wouldn't be so useless.
9	root	1.100
10	root	1.201	3.261 Wed Jul 1 10:11:51 CEST 2009
11	root	1.200	- more OS X workarounds (patch by Tokuhiro Matsuno).
12
13	root	1.199	3.26 Tue Jun 30 09:33:26 CEST 2009
14			- os x of course claims posix 2008 but lacks posix_fadvise. try to work
15			around this horribly broken OS in a somewhat hackish way. might help
16			other os's too.
17
18	root	1.198	3.25 Sat Jun 27 05:18:26 CEST 2009
19	root	1.197	- added IO::AIO::fadvise and IO::AIO::sendfile.
20	root	1.195	- (libeio) replaced quicksort+insertion sort by a tuned radix
21			sort + insertion sort, resulting in comparable runtime (usually
22			faster) to the old version, but without any ill side effects on
23			degenerated (for quicksort) data.
24			- (libeio) correctly sort dirs by inodes if we have perfect type
25	root	1.194	knowledge and DIRS_FIRST is used.
26	root	1.195	- (libeio) internally the wrong DT_* constants were used, but no
27			known system has differing EIO_DT_/DT_ values, so not an issue.
28			- removed a (harmless) assert that was left over on the code
29			but should not have been.
30	root	1.196	- use more correct types (change IO length from IV to VAL64,
31			which makes a difference on systems without 64 bit perls).
32	root	1.194
33	root	1.193	3.23 Sat Jun 13 16:57:58 CEST 2009
34			- fix off-by-one bug in aio_readdir that was introduced in the
35			rushed 3.22 release.
36
37	root	1.192	3.22 Sat Jun 13 15:32:40 CEST 2009
38	root	1.191	- speed up readdirx sort algorithm slightly.
39	root	1.192	- bin/treescan was missing from distro tarball.
40	root	1.191
41	root	1.190	3.21 Fri Jun 12 18:45:53 CEST 2009
42	root	1.187	- new options --dirs and --files for treescan.
43	root	1.188	- install bin/treescan by default.
44	root	1.189	- (libeio) aio_readdir can now be cancelled while executing.
45	root	1.190	- fix a printf format string for 64 bit systems (could lead
46			to problems on big endian 64 bit systems).
47			- do not use qsort() but our own algorithm: glibc initialises
48			the whole locale and I/O subsystem inside qsort, causing
49			a stack overflow on 32 bit machines. The new sort uses much less
50			stack and is more than twice as fast in typical situations.
51	root	1.187
52	root	1.186	3.2 Sun Jun 7 20:30:05 CEST 2009
53	root	1.182	- (libeio) pwrite emulation was even more flawed than intended and did
54			not restore the file offset.
55	root	1.183	- add aio_readdirx, which can return inode and filetype and sort
56			the names in various ways.
57	root	1.182	- unfortunately, utime, chmod, chown on an open file that has just
58			been written can easily block, which caused aio_copy to block the
59			process. no more!
60			- no longer rely on dst path in aio_copy when futime is available.
61
62	root	1.181	3.19 Tue Apr 21 22:05:21 CEST 2009
63			- more perl 5.10 workarounds for aio_read and write.
64			- aio_write no longer modifies the sv (if possible).
65			- aio_read now works correctly with magic values.
66
67	root	1.180	3.18 Sun Apr 19 21:17:32 CEST 2009
68	root	1.179	- better diagnostics when some aio_* functions get passed an illegal fh.
69	root	1.180	- try to avoid crashes due to incompatible 5.10 API changes. grmbl.
70	root	1.178
71	root	1.177	3.17 Thu Nov 20 08:45:36 CET 2008
72	root	1.176	- (libeio) added aio_sync_file_range (untested).
73	root	1.177	- add aio_busy to @IO::AIO::AIO_REQ.
74	root	1.175
75	root	1.174	3.16 Wed Oct 22 18:28:01 CEST 2008
76	root	1.173	- use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
77			part to improve portability to perl 5.8 (reported by szymon).
78
79	root	1.172	3.15 Mon Oct 13 00:39:55 CEST 2008
80	root	1.171	- automatic removal of feeders was broken.
81			- (libeio) use a more robust method to detect whether a feeder
82			has added something to the group or not.
83
84	root	1.170	3.1 Thu Oct 2 13:34:40 CEST 2008
85	root	1.168	- pre-deref the passed callback object, for increased speed
86			and decreased memory usage.
87	root	1.167	- call on_next_submit callback even for aio_group - impact unknown,
88	root	1.166	but seems more correct.
89	root	1.168	- $req->cb now returns the original callback.
90	root	1.166	- (libeio) pass EIO_GROUP/aio_group requests through the queue without
91			requiring a thread switch.
92	root	1.169	- (libeio) status code of aio_futime and aio_utime was always passed 0.
93	root	1.166	- do some other µ-optimisations.
94
95	root	1.165	3.07 Sat Aug 2 16:06:13 CEST 2008
96			- do not include LIBS in autoconf tests.
97
98	root	1.164	3.06 Tue Jul 15 12:41:32 CEST 2008
99	root	1.162	- move preadwritelock definition before it's first reference,
100	root	1.164	to make it compile again on broken platforms (they still exist)
101			or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
102	root	1.162
103	root	1.161	3.05 Thu Jun 19 23:23:52 CEST 2008
104	root	1.160	- work around perl overriding readdir etc. with thread-unsafe
105	root	1.161	(sic!) versions.
106	root	1.160
107	root	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
108			- (libeio) fix eio_mknod, which confused it's arguments.
109	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
110			is stupid.
111	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
112			- (libeio) fix a bug that could potentially cause IO::AIO
113			not to get initialised properly.
114	root	1.158
115	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
116	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
117	root	1.155	- (libeio) work around broken bsd headers once more.
118	root	1.154	- reduce shared library size again by not including wrappers.
119	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
120			- document the new IO::AIO::poll_cb result value.
121	root	1.153
122	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
123	root	1.150	- fix a memory leak on aio_readlink.
124			- bring back working fchmod.
125	root	1.151	- nop and busy now set result to 0.
126			- set errno to ENOMEM when allocation fails.
127	root	1.150
128	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
129			- (libeio) make it compile on systems without readahead or readdir_r.
130	root	1.148	- (libeio) improve configure check for readahead availability.
131			- do not try to link against -lrt.
132	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
133
134	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
135	root	1.145	- added bin/treescan to the distribution.
136			- switched to using libeio.
137			- LOTS OF INCOMPATIBLE CHANGES:
138			- remove signal functionality, it is not worth the effort.
139			- max_outstanding no longer returns the previous number of requests.
140			- poll_cb no longer returns number of requests.
141	root	1.143
142	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
143	root	1.141	- port to solaris perls configured for old posix
144			(analysed by Jost Krieger).
145	root	1.142	- keep a reference to the perl filehandle object in aio_close,
146			so it doesn't get closed prematurely, leading to ugly races.
147	root	1.141
148	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
149	root	1.137	- fix treescan output duplication and improve output ordering.
150			also display files given on the commandline.
151	root	1.140	- use a different algorithm for aio_close that is faster
152			and probably has even lower chances of blocking.
153	root	1.138	- do our own stack memory management for threads - linux
154			allocates outrageous amounts of VM (not so bad unless you
155			use mlockall...), which severely limits the number of threads
156	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
157			and 4096 * sizeof (long) (usually this is 16..64k).
158	root	1.137
159	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
160	root	1.134	- added aio_sync.
161	root	1.135	- added aio_pathsync.
162	root	1.136	- fix prototypes of (void) functions.
163	root	1.134
164	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
165			- perlio isn't generally threadsafe, so aio_close could not work reliably.
166			aio_close now tries a safe hack that might not be that asynchronous
167			(see the manpage for details).
168			- discard callback return values as to not grow the stack endlessly
169			when poll_cb handles many requests without returning.
170			- minor code cleanups.
171
172	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
173	root	1.131	- replaced _fd2fh with faster xs code.
174			- aio_close will now try to do "the right thing" and thus might
175			work sensibly for the very first time.
176
177	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
178	root	1.129	- after fork, invest some work to make sure that the poll_fileno
179			stays stable (by dup2'ing the new fd over the old one), to make
180			it easier for programs/libs that don't control their forking
181			behaviour and cannot recreate their watchers.
182
183	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
184	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
185			successfully demonstrated that you can block on futimes...).
186	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
187			internally (useful for sockets or O_APPEND handles).
188	root	1.126	- allow undef for length in aio_write.
189			- negative dataoffsets work as expected now in aio_read/aio_write.
190	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
191	root	1.125	have a larger range then.
192	root	1.120	- shared code between BDB and IO::AIO.
193	root	1.127	- aio_busy was completely broken. now fixed.
194			- readahead emulation now returns something.
195	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
196			(should never happen, though).
197	root	1.127	- large changes to make it partially compile and run on win32,
198			but win32 lacks too much functionality, and perl overrides way
199			too many functions with crashing versions.
200	root	1.120
201	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
202			- fix install path (Andreas J. Koenig).
203
204	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
205	root	1.114	- added aio_rmtree.
206	root	1.115	- wow, aio_mkdir was missing.
207	root	1.116	- aio_load did return undef on error, not -1.
208	root	1.117	- use prefixexp not prefix in autoconf.pm
209			(suggested by ... rt.cpan.org unreachable).
210	root	1.118	- avoid installing autoconf.pm.
211	root	1.114
212	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
213	root	1.112	- added aio_load.
214
215	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
216			- fix off-by-one bug in aio_read, causing memory corruption
217			or crashes.
218
219	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
220	root	1.108	- minor doc updates.
221	root	1.107	- minor cleanups.
222			- IO::AIO::poll returns request count.
223	root	1.109	- undocumented and unfinished async-signal-reporting.
224	root	1.107
225	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
226	root	1.100	- minor doc updates.
227	root	1.101	- added aio_readlink.
228			- properly zero-terminate aio_read buffer.
229			- fix aio_read/write with nonzero dataoffset.
230	root	1.104	- reduced size of aio request structure.
231	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
232	root	1.105	do not leak request in that case, either.
233	root	1.94
234	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
235	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
236			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
237	root	1.95	- fix a bug in aio_move where it would fail everytime
238			it would have to copy files manually.
239	root	1.98	- doc updates.
240	root	1.94	- start threads only on (very low) demand.
241	root	1.97	- end superfluous threads automatically after 10s idling.
242	root	1.98	- add IO::AIO::max_idle to control this.
243	root	1.94	- some tuning applied to random places.
244	root	1.95	- add aio_mknod.
245	root	1.59
246	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
247	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
248	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
249	root	1.68	- aio requests can be cancelled.
250	root	1.81	- callbacks can be (re-)set later.
251	root	1.93	- aio requests can choose between 9 priorities.
252	root	1.83	- add aio_group: aio requests can be grouped
253			into composite requests.
254			- generator interface for groups.
255	root	1.89	- add IO::AIO::poll_some.
256	root	1.72	- major documentation improvements.
257			- very minor bugfixes.
258	root	1.76	- add aio_nop for dummy requests.
259	root	1.84	- add aio_busy mainly for benchmarking and debugging.
260	root	1.79	- use "fast" mutexes on linux.
261	root	1.80	- use dynamic (and larger) buffers instead of
262			putting them onto the stack.
263			- optimise x86 and amd64 a bit.
264			- better error checking when ENOMEM.
265	root	1.85	- hopefully fix mem and dirp leaks on fork.
266	root	1.92	- warn about broken perl malloc.
267	root	1.88	- compiles on cygwin (but pread is broken on cygwin
268			which is not detected by autoconf, so you have to
269			edit autoconf/config.h yourself to enable emulation).
270	root	1.68
271	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
272	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
273
274	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
275			- codename "jost"
276			- AIX/Solaris(?) aren't being helpful again, hardcode a value
277			for NAME_MAX and drive with your eyes closed (reported by
278			wcooley@nakedape.cc).
279	root	1.63
280	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
281	root	1.61	- another minor bug in aio_scandir, again, the callback was called
282			twice when the directory can't be stat'ed.
283
284	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
285			- grr, another minor bug in aio_scandir, this time resulting
286			in a runtime error.
287
288	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
289	root	1.58	- aio_scandir errornously called callback twice in some cases.
290	root	1.57	- added AnyEvent example.
291
292	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
293	root	1.54	- no longer include $Config{libs}, as distros include too much
294	root	1.56	garbage in there that is not installed on typical systems
295	root	1.54	(for example, debian links perl against -lgdbm and many more
296			libraries despite perl not needing it, slowing down startup and
297			wasting memory).
298
299	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
300			- added aio_readdir, aio_scandir.
301	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
302			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
303			support is unavailable on my solaris 8 machine, but preliminary
304			code is there. What's lacking is configury stuff and testing...).
305	root	1.46
306	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
307	root	1.51	- create the aio threads on demand only (good after forking).
308	root	1.41	- somebody nagged about C89 compatibility, so this release should
309	root	1.42	be C89 compatible, but no guarantees for future ones.
310	root	1.43	- abort when the configure script fails.
311	root	1.41
312	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
313	root	1.93	- forgot to recreate the pipe after forking, this could cause
314	root	1.40	deadlocks.
315
316	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
317	root	1.33	- properly propagate exceptions from callbacks, instead of silently
318			eating them.
319	root	1.38	- use a different fork algorithm that avoids recursive callback
320			invocations and reduces fork latency in busy processes.
321	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
322			length after reading.
323			- fix a bug where the child would process some outstanding requests
324			from the parent.
325			- make a copy of the callback scalar, to avoid some very uncommon
326			(but valid) usages where the callback scalar changes.
327			- the callback was never freed in aio_read/aio_write.
328	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
329			scalar for better error reporting.
330	root	1.33
331	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
332			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
333	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
334			the external filename encoding first.
335	root	1.32	- fix the bug where filehandles could leak (again).
336	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
337			with your underdocumented, broken and outdated OS.
338			- fork'ing should now be officially supported (where linux and
339			posix contradict each other, I followed posix).
340	root	1.32	- only call read() once per poll, not twice (speedup).
341			- new functions: aio_rmdir, aio_symlink.
342	root	1.31	- force callback arguments to be undef or a reference, for better
343			error catching.
344	root	1.1
345	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
346	root	1.25	- added configure script to detect availability of some calls.
347	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
348	root	1.23	feedback yet).
349	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
350			and readahead via manual reading on platforms lacking those.
351	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
352			from Linux::AIO.
353	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
354			compile with it enabled. Probably breaks others. Oh well.
355	root	1.24	- try to be more careful with errno on non-threaded perls.
356	root	1.26	- cygwins perl insisted on a matching open mode when morphing
357			the fd to an fh.
358	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
359			do that for pathnames, too, in the future, so make sure you
360			properly encode your pathnames.
361	root	1.18
362	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
363			- aio_open did not reliably deliver (open) filehandles.
364	root	1.16	- all aio_*-functions keep a reference to the filehandle so
365			it doesn't go away while the aio requests is working on it.
366			- disable warnings in AIO.pm.
367
368	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
369			- allow recursive calls to poll_cb, use less locking calls, too.
370			- fix the Gtk2-example in the SYNOPSIS.
371	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
372			from Linux::AIO.
373			(found by compiling on cygwin. Unfortunately, cygwin declares but
374			does not implement pread/pwrite).
375			- only include <sys/syscall.h> on linux.
376
377	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
378	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
379			need it anyway.
380			- link against -lrt, as it might contain goodies such as fdatasync,
381			and often aio_read, which we do not use yet, but it shouldn't hurt.
382
383	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
384	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
385	root	1.10	- make callback argument optional for all calls.
386	root	1.8
387	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
388	root	1.5	- restructured manpage.
389	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
390			- remove explicit context support so I don't have to maintain
391			it for threaded perls (i.e. it should work now :).
392	root	1.5
393	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
394	root	1.2	- return immediately from poll_wait if nreqs==0.
395			- get rid of the request pipe and use faster thread-thread
396	root	1.3	communications for most requests and responses.
397	root	1.2
398	root	1.1	0.1
399			- cloned from Linux::AIO, which is very similar.
400