[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/sync_file_range? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
TODO: aio_fcntl, at least for file-locking

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:	1.149
Committed:	Sun May 11 01:08:05 2008 UTC (16 years ago) by root
Branch:	MAIN
CVS Tags:	rel-3_01
Changes since 1.148:	+2 -1 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	1.123	TODO: splice/tee/vmsplice/sync_file_range? (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	1.149	3.01 Sun May 11 03:07:03 CEST 2008
10			- (libeio) make it compile on systems without readahead or readdir_r.
11	root	1.148	- (libeio) improve configure check for readahead availability.
12			- do not try to link against -lrt.
13	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
14
15	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
16	root	1.145	- added bin/treescan to the distribution.
17			- switched to using libeio.
18			- LOTS OF INCOMPATIBLE CHANGES:
19			- remove signal functionality, it is not worth the effort.
20			- max_outstanding no longer returns the previous number of requests.
21			- poll_cb no longer returns number of requests.
22	root	1.143
23	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
24	root	1.141	- port to solaris perls configured for old posix
25			(analysed by Jost Krieger).
26	root	1.142	- keep a reference to the perl filehandle object in aio_close,
27			so it doesn't get closed prematurely, leading to ugly races.
28	root	1.141
29	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
30	root	1.137	- fix treescan output duplication and improve output ordering.
31			also display files given on the commandline.
32	root	1.140	- use a different algorithm for aio_close that is faster
33			and probably has even lower chances of blocking.
34	root	1.138	- do our own stack memory management for threads - linux
35			allocates outrageous amounts of VM (not so bad unless you
36			use mlockall...), which severely limits the number of threads
37	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
38			and 4096 * sizeof (long) (usually this is 16..64k).
39	root	1.137
40	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
41	root	1.134	- added aio_sync.
42	root	1.135	- added aio_pathsync.
43	root	1.136	- fix prototypes of (void) functions.
44	root	1.134
45	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
46			- perlio isn't generally threadsafe, so aio_close could not work reliably.
47			aio_close now tries a safe hack that might not be that asynchronous
48			(see the manpage for details).
49			- discard callback return values as to not grow the stack endlessly
50			when poll_cb handles many requests without returning.
51			- minor code cleanups.
52
53	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
54	root	1.131	- replaced _fd2fh with faster xs code.
55			- aio_close will now try to do "the right thing" and thus might
56			work sensibly for the very first time.
57
58	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
59	root	1.129	- after fork, invest some work to make sure that the poll_fileno
60			stays stable (by dup2'ing the new fd over the old one), to make
61			it easier for programs/libs that don't control their forking
62			behaviour and cannot recreate their watchers.
63
64	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
65	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
66			successfully demonstrated that you can block on futimes...).
67	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
68			internally (useful for sockets or O_APPEND handles).
69	root	1.126	- allow undef for length in aio_write.
70			- negative dataoffsets work as expected now in aio_read/aio_write.
71	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
72	root	1.125	have a larger range then.
73	root	1.120	- shared code between BDB and IO::AIO.
74	root	1.127	- aio_busy was completely broken. now fixed.
75			- readahead emulation now returns something.
76	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
77			(should never happen, though).
78	root	1.127	- large changes to make it partially compile and run on win32,
79			but win32 lacks too much functionality, and perl overrides way
80			too many functions with crashing versions.
81	root	1.120
82	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
83			- fix install path (Andreas J. Koenig).
84
85	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
86	root	1.114	- added aio_rmtree.
87	root	1.115	- wow, aio_mkdir was missing.
88	root	1.116	- aio_load did return undef on error, not -1.
89	root	1.117	- use prefixexp not prefix in autoconf.pm
90			(suggested by ... rt.cpan.org unreachable).
91	root	1.118	- avoid installing autoconf.pm.
92	root	1.114
93	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
94	root	1.112	- added aio_load.
95
96	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
97			- fix off-by-one bug in aio_read, causing memory corruption
98			or crashes.
99
100	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
101	root	1.108	- minor doc updates.
102	root	1.107	- minor cleanups.
103			- IO::AIO::poll returns request count.
104	root	1.109	- undocumented and unfinished async-signal-reporting.
105	root	1.107
106	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
107	root	1.100	- minor doc updates.
108	root	1.101	- added aio_readlink.
109			- properly zero-terminate aio_read buffer.
110			- fix aio_read/write with nonzero dataoffset.
111	root	1.104	- reduced size of aio request structure.
112	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
113	root	1.105	do not leak request in that case, either.
114	root	1.94
115	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
116	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
117			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
118	root	1.95	- fix a bug in aio_move where it would fail everytime
119			it would have to copy files manually.
120	root	1.98	- doc updates.
121	root	1.94	- start threads only on (very low) demand.
122	root	1.97	- end superfluous threads automatically after 10s idling.
123	root	1.98	- add IO::AIO::max_idle to control this.
124	root	1.94	- some tuning applied to random places.
125	root	1.95	- add aio_mknod.
126	root	1.59
127	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
128	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
129	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
130	root	1.68	- aio requests can be cancelled.
131	root	1.81	- callbacks can be (re-)set later.
132	root	1.93	- aio requests can choose between 9 priorities.
133	root	1.83	- add aio_group: aio requests can be grouped
134			into composite requests.
135			- generator interface for groups.
136	root	1.89	- add IO::AIO::poll_some.
137	root	1.72	- major documentation improvements.
138			- very minor bugfixes.
139	root	1.76	- add aio_nop for dummy requests.
140	root	1.84	- add aio_busy mainly for benchmarking and debugging.
141	root	1.79	- use "fast" mutexes on linux.
142	root	1.80	- use dynamic (and larger) buffers instead of
143			putting them onto the stack.
144			- optimise x86 and amd64 a bit.
145			- better error checking when ENOMEM.
146	root	1.85	- hopefully fix mem and dirp leaks on fork.
147	root	1.92	- warn about broken perl malloc.
148	root	1.88	- compiles on cygwin (but pread is broken on cygwin
149			which is not detected by autoconf, so you have to
150			edit autoconf/config.h yourself to enable emulation).
151	root	1.68
152	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
153	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
154
155	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
156			- codename "jost"
157			- AIX/Solaris(?) aren't being helpful again, hardcode a value
158			for NAME_MAX and drive with your eyes closed (reported by
159			wcooley@nakedape.cc).
160	root	1.63
161	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
162	root	1.61	- another minor bug in aio_scandir, again, the callback was called
163			twice when the directory can't be stat'ed.
164
165	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
166			- grr, another minor bug in aio_scandir, this time resulting
167			in a runtime error.
168
169	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
170	root	1.58	- aio_scandir errornously called callback twice in some cases.
171	root	1.57	- added AnyEvent example.
172
173	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
174	root	1.54	- no longer include $Config{libs}, as distros include too much
175	root	1.56	garbage in there that is not installed on typical systems
176	root	1.54	(for example, debian links perl against -lgdbm and many more
177			libraries despite perl not needing it, slowing down startup and
178			wasting memory).
179
180	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
181			- added aio_readdir, aio_scandir.
182	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
183			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
184			support is unavailable on my solaris 8 machine, but preliminary
185			code is there. What's lacking is configury stuff and testing...).
186	root	1.46
187	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
188	root	1.51	- create the aio threads on demand only (good after forking).
189	root	1.41	- somebody nagged about C89 compatibility, so this release should
190	root	1.42	be C89 compatible, but no guarantees for future ones.
191	root	1.43	- abort when the configure script fails.
192	root	1.41
193	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
194	root	1.93	- forgot to recreate the pipe after forking, this could cause
195	root	1.40	deadlocks.
196
197	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
198	root	1.33	- properly propagate exceptions from callbacks, instead of silently
199			eating them.
200	root	1.38	- use a different fork algorithm that avoids recursive callback
201			invocations and reduces fork latency in busy processes.
202	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
203			length after reading.
204			- fix a bug where the child would process some outstanding requests
205			from the parent.
206			- make a copy of the callback scalar, to avoid some very uncommon
207			(but valid) usages where the callback scalar changes.
208			- the callback was never freed in aio_read/aio_write.
209	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
210			scalar for better error reporting.
211	root	1.33
212	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
213			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
214	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
215			the external filename encoding first.
216	root	1.32	- fix the bug where filehandles could leak (again).
217	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
218			with your underdocumented, broken and outdated OS.
219			- fork'ing should now be officially supported (where linux and
220			posix contradict each other, I followed posix).
221	root	1.32	- only call read() once per poll, not twice (speedup).
222			- new functions: aio_rmdir, aio_symlink.
223	root	1.31	- force callback arguments to be undef or a reference, for better
224			error catching.
225	root	1.1
226	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
227	root	1.25	- added configure script to detect availability of some calls.
228	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
229	root	1.23	feedback yet).
230	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
231			and readahead via manual reading on platforms lacking those.
232	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
233			from Linux::AIO.
234	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
235			compile with it enabled. Probably breaks others. Oh well.
236	root	1.24	- try to be more careful with errno on non-threaded perls.
237	root	1.26	- cygwins perl insisted on a matching open mode when morphing
238			the fd to an fh.
239	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
240			do that for pathnames, too, in the future, so make sure you
241			properly encode your pathnames.
242	root	1.18
243	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
244			- aio_open did not reliably deliver (open) filehandles.
245	root	1.16	- all aio_*-functions keep a reference to the filehandle so
246			it doesn't go away while the aio requests is working on it.
247			- disable warnings in AIO.pm.
248
249	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
250			- allow recursive calls to poll_cb, use less locking calls, too.
251			- fix the Gtk2-example in the SYNOPSIS.
252	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
253			from Linux::AIO.
254			(found by compiling on cygwin. Unfortunately, cygwin declares but
255			does not implement pread/pwrite).
256			- only include <sys/syscall.h> on linux.
257
258	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
259	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
260			need it anyway.
261			- link against -lrt, as it might contain goodies such as fdatasync,
262			and often aio_read, which we do not use yet, but it shouldn't hurt.
263
264	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
265	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
266	root	1.10	- make callback argument optional for all calls.
267	root	1.8
268	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
269	root	1.5	- restructured manpage.
270	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
271			- remove explicit context support so I don't have to maintain
272			it for threaded perls (i.e. it should work now :).
273	root	1.5
274	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
275	root	1.2	- return immediately from poll_wait if nreqs==0.
276			- get rid of the request pipe and use faster thread-thread
277	root	1.3	communications for most requests and responses.
278	root	1.2
279	root	1.1	0.1
280			- cloned from Linux::AIO, which is very similar.
281