[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

3.03 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:	1.157
Committed:	Thu May 29 03:35:03 2008 UTC (16 years ago) by root
Branch:	MAIN
CVS Tags:	rel-3_03
Changes since 1.156:	+1 -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	1.157	3.03 Thu May 29 05:33:30 CEST 2008
10	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
11	root	1.155	- (libeio) work around broken bsd headers once more.
12	root	1.154	- reduce shared library size again by not including wrappers.
13	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
14			- document the new IO::AIO::poll_cb result value.
15	root	1.153
16	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
17	root	1.150	- fix a memory leak on aio_readlink.
18			- bring back working fchmod.
19	root	1.151	- nop and busy now set result to 0.
20			- set errno to ENOMEM when allocation fails.
21	root	1.150
22	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
23			- (libeio) make it compile on systems without readahead or readdir_r.
24	root	1.148	- (libeio) improve configure check for readahead availability.
25			- do not try to link against -lrt.
26	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
27
28	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
29	root	1.145	- added bin/treescan to the distribution.
30			- switched to using libeio.
31			- LOTS OF INCOMPATIBLE CHANGES:
32			- remove signal functionality, it is not worth the effort.
33			- max_outstanding no longer returns the previous number of requests.
34			- poll_cb no longer returns number of requests.
35	root	1.143
36	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
37	root	1.141	- port to solaris perls configured for old posix
38			(analysed by Jost Krieger).
39	root	1.142	- keep a reference to the perl filehandle object in aio_close,
40			so it doesn't get closed prematurely, leading to ugly races.
41	root	1.141
42	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
43	root	1.137	- fix treescan output duplication and improve output ordering.
44			also display files given on the commandline.
45	root	1.140	- use a different algorithm for aio_close that is faster
46			and probably has even lower chances of blocking.
47	root	1.138	- do our own stack memory management for threads - linux
48			allocates outrageous amounts of VM (not so bad unless you
49			use mlockall...), which severely limits the number of threads
50	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
51			and 4096 * sizeof (long) (usually this is 16..64k).
52	root	1.137
53	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
54	root	1.134	- added aio_sync.
55	root	1.135	- added aio_pathsync.
56	root	1.136	- fix prototypes of (void) functions.
57	root	1.134
58	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
59			- perlio isn't generally threadsafe, so aio_close could not work reliably.
60			aio_close now tries a safe hack that might not be that asynchronous
61			(see the manpage for details).
62			- discard callback return values as to not grow the stack endlessly
63			when poll_cb handles many requests without returning.
64			- minor code cleanups.
65
66	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
67	root	1.131	- replaced _fd2fh with faster xs code.
68			- aio_close will now try to do "the right thing" and thus might
69			work sensibly for the very first time.
70
71	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
72	root	1.129	- after fork, invest some work to make sure that the poll_fileno
73			stays stable (by dup2'ing the new fd over the old one), to make
74			it easier for programs/libs that don't control their forking
75			behaviour and cannot recreate their watchers.
76
77	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
78	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
79			successfully demonstrated that you can block on futimes...).
80	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
81			internally (useful for sockets or O_APPEND handles).
82	root	1.126	- allow undef for length in aio_write.
83			- negative dataoffsets work as expected now in aio_read/aio_write.
84	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
85	root	1.125	have a larger range then.
86	root	1.120	- shared code between BDB and IO::AIO.
87	root	1.127	- aio_busy was completely broken. now fixed.
88			- readahead emulation now returns something.
89	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
90			(should never happen, though).
91	root	1.127	- large changes to make it partially compile and run on win32,
92			but win32 lacks too much functionality, and perl overrides way
93			too many functions with crashing versions.
94	root	1.120
95	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
96			- fix install path (Andreas J. Koenig).
97
98	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
99	root	1.114	- added aio_rmtree.
100	root	1.115	- wow, aio_mkdir was missing.
101	root	1.116	- aio_load did return undef on error, not -1.
102	root	1.117	- use prefixexp not prefix in autoconf.pm
103			(suggested by ... rt.cpan.org unreachable).
104	root	1.118	- avoid installing autoconf.pm.
105	root	1.114
106	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
107	root	1.112	- added aio_load.
108
109	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
110			- fix off-by-one bug in aio_read, causing memory corruption
111			or crashes.
112
113	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
114	root	1.108	- minor doc updates.
115	root	1.107	- minor cleanups.
116			- IO::AIO::poll returns request count.
117	root	1.109	- undocumented and unfinished async-signal-reporting.
118	root	1.107
119	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
120	root	1.100	- minor doc updates.
121	root	1.101	- added aio_readlink.
122			- properly zero-terminate aio_read buffer.
123			- fix aio_read/write with nonzero dataoffset.
124	root	1.104	- reduced size of aio request structure.
125	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
126	root	1.105	do not leak request in that case, either.
127	root	1.94
128	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
129	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
130			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
131	root	1.95	- fix a bug in aio_move where it would fail everytime
132			it would have to copy files manually.
133	root	1.98	- doc updates.
134	root	1.94	- start threads only on (very low) demand.
135	root	1.97	- end superfluous threads automatically after 10s idling.
136	root	1.98	- add IO::AIO::max_idle to control this.
137	root	1.94	- some tuning applied to random places.
138	root	1.95	- add aio_mknod.
139	root	1.59
140	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
141	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
142	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
143	root	1.68	- aio requests can be cancelled.
144	root	1.81	- callbacks can be (re-)set later.
145	root	1.93	- aio requests can choose between 9 priorities.
146	root	1.83	- add aio_group: aio requests can be grouped
147			into composite requests.
148			- generator interface for groups.
149	root	1.89	- add IO::AIO::poll_some.
150	root	1.72	- major documentation improvements.
151			- very minor bugfixes.
152	root	1.76	- add aio_nop for dummy requests.
153	root	1.84	- add aio_busy mainly for benchmarking and debugging.
154	root	1.79	- use "fast" mutexes on linux.
155	root	1.80	- use dynamic (and larger) buffers instead of
156			putting them onto the stack.
157			- optimise x86 and amd64 a bit.
158			- better error checking when ENOMEM.
159	root	1.85	- hopefully fix mem and dirp leaks on fork.
160	root	1.92	- warn about broken perl malloc.
161	root	1.88	- compiles on cygwin (but pread is broken on cygwin
162			which is not detected by autoconf, so you have to
163			edit autoconf/config.h yourself to enable emulation).
164	root	1.68
165	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
166	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
167
168	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
169			- codename "jost"
170			- AIX/Solaris(?) aren't being helpful again, hardcode a value
171			for NAME_MAX and drive with your eyes closed (reported by
172			wcooley@nakedape.cc).
173	root	1.63
174	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
175	root	1.61	- another minor bug in aio_scandir, again, the callback was called
176			twice when the directory can't be stat'ed.
177
178	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
179			- grr, another minor bug in aio_scandir, this time resulting
180			in a runtime error.
181
182	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
183	root	1.58	- aio_scandir errornously called callback twice in some cases.
184	root	1.57	- added AnyEvent example.
185
186	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
187	root	1.54	- no longer include $Config{libs}, as distros include too much
188	root	1.56	garbage in there that is not installed on typical systems
189	root	1.54	(for example, debian links perl against -lgdbm and many more
190			libraries despite perl not needing it, slowing down startup and
191			wasting memory).
192
193	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
194			- added aio_readdir, aio_scandir.
195	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
196			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
197			support is unavailable on my solaris 8 machine, but preliminary
198			code is there. What's lacking is configury stuff and testing...).
199	root	1.46
200	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
201	root	1.51	- create the aio threads on demand only (good after forking).
202	root	1.41	- somebody nagged about C89 compatibility, so this release should
203	root	1.42	be C89 compatible, but no guarantees for future ones.
204	root	1.43	- abort when the configure script fails.
205	root	1.41
206	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
207	root	1.93	- forgot to recreate the pipe after forking, this could cause
208	root	1.40	deadlocks.
209
210	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
211	root	1.33	- properly propagate exceptions from callbacks, instead of silently
212			eating them.
213	root	1.38	- use a different fork algorithm that avoids recursive callback
214			invocations and reduces fork latency in busy processes.
215	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
216			length after reading.
217			- fix a bug where the child would process some outstanding requests
218			from the parent.
219			- make a copy of the callback scalar, to avoid some very uncommon
220			(but valid) usages where the callback scalar changes.
221			- the callback was never freed in aio_read/aio_write.
222	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
223			scalar for better error reporting.
224	root	1.33
225	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
226			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
227	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
228			the external filename encoding first.
229	root	1.32	- fix the bug where filehandles could leak (again).
230	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
231			with your underdocumented, broken and outdated OS.
232			- fork'ing should now be officially supported (where linux and
233			posix contradict each other, I followed posix).
234	root	1.32	- only call read() once per poll, not twice (speedup).
235			- new functions: aio_rmdir, aio_symlink.
236	root	1.31	- force callback arguments to be undef or a reference, for better
237			error catching.
238	root	1.1
239	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
240	root	1.25	- added configure script to detect availability of some calls.
241	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
242	root	1.23	feedback yet).
243	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
244			and readahead via manual reading on platforms lacking those.
245	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
246			from Linux::AIO.
247	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
248			compile with it enabled. Probably breaks others. Oh well.
249	root	1.24	- try to be more careful with errno on non-threaded perls.
250	root	1.26	- cygwins perl insisted on a matching open mode when morphing
251			the fd to an fh.
252	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
253			do that for pathnames, too, in the future, so make sure you
254			properly encode your pathnames.
255	root	1.18
256	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
257			- aio_open did not reliably deliver (open) filehandles.
258	root	1.16	- all aio_*-functions keep a reference to the filehandle so
259			it doesn't go away while the aio requests is working on it.
260			- disable warnings in AIO.pm.
261
262	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
263			- allow recursive calls to poll_cb, use less locking calls, too.
264			- fix the Gtk2-example in the SYNOPSIS.
265	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
266			from Linux::AIO.
267			(found by compiling on cygwin. Unfortunately, cygwin declares but
268			does not implement pread/pwrite).
269			- only include <sys/syscall.h> on linux.
270
271	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
272	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
273			need it anyway.
274			- link against -lrt, as it might contain goodies such as fdatasync,
275			and often aio_read, which we do not use yet, but it shouldn't hurt.
276
277	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
278	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
279	root	1.10	- make callback argument optional for all calls.
280	root	1.8
281	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
282	root	1.5	- restructured manpage.
283	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
284			- remove explicit context support so I don't have to maintain
285			it for threaded perls (i.e. it should work now :).
286	root	1.5
287	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
288	root	1.2	- return immediately from poll_wait if nreqs==0.
289			- get rid of the request pipe and use faster thread-thread
290	root	1.3	communications for most requests and responses.
291	root	1.2
292	root	1.1	0.1
293			- cloned from Linux::AIO, which is very similar.
294