[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

        - new options --dirs and --files for treescan.
        - install bin/treescan by default.

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