[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.

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