[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

3.1  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:	1.170
Committed:	Thu Oct 2 11:35:03 2008 UTC (15 years, 7 months ago) by root
Branch:	MAIN
CVS Tags:	rel-3_1
Changes since 1.169:	+1 -1 lines
Log Message:	3.1
#	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	1.170	3.1 Thu Oct 2 13:34:40 CEST 2008
10	root	1.168	- pre-deref the passed callback object, for increased speed
11			and decreased memory usage.
12	root	1.167	- call on_next_submit callback even for aio_group - impact unknown,
13	root	1.166	but seems more correct.
14	root	1.168	- $req->cb now returns the original callback.
15	root	1.166	- (libeio) pass EIO_GROUP/aio_group requests through the queue without
16			requiring a thread switch.
17	root	1.169	- (libeio) status code of aio_futime and aio_utime was always passed 0.
18	root	1.166	- do some other µ-optimisations.
19
20	root	1.165	3.07 Sat Aug 2 16:06:13 CEST 2008
21			- do not include LIBS in autoconf tests.
22
23	root	1.164	3.06 Tue Jul 15 12:41:32 CEST 2008
24	root	1.162	- move preadwritelock definition before it's first reference,
25	root	1.164	to make it compile again on broken platforms (they still exist)
26			or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
27	root	1.162
28	root	1.161	3.05 Thu Jun 19 23:23:52 CEST 2008
29	root	1.160	- work around perl overriding readdir etc. with thread-unsafe
30	root	1.161	(sic!) versions.
31	root	1.160
32	root	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
33			- (libeio) fix eio_mknod, which confused it's arguments.
34	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
35			is stupid.
36	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
37			- (libeio) fix a bug that could potentially cause IO::AIO
38			not to get initialised properly.
39	root	1.158
40	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
41	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
42	root	1.155	- (libeio) work around broken bsd headers once more.
43	root	1.154	- reduce shared library size again by not including wrappers.
44	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
45			- document the new IO::AIO::poll_cb result value.
46	root	1.153
47	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
48	root	1.150	- fix a memory leak on aio_readlink.
49			- bring back working fchmod.
50	root	1.151	- nop and busy now set result to 0.
51			- set errno to ENOMEM when allocation fails.
52	root	1.150
53	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
54			- (libeio) make it compile on systems without readahead or readdir_r.
55	root	1.148	- (libeio) improve configure check for readahead availability.
56			- do not try to link against -lrt.
57	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
58
59	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
60	root	1.145	- added bin/treescan to the distribution.
61			- switched to using libeio.
62			- LOTS OF INCOMPATIBLE CHANGES:
63			- remove signal functionality, it is not worth the effort.
64			- max_outstanding no longer returns the previous number of requests.
65			- poll_cb no longer returns number of requests.
66	root	1.143
67	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
68	root	1.141	- port to solaris perls configured for old posix
69			(analysed by Jost Krieger).
70	root	1.142	- keep a reference to the perl filehandle object in aio_close,
71			so it doesn't get closed prematurely, leading to ugly races.
72	root	1.141
73	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
74	root	1.137	- fix treescan output duplication and improve output ordering.
75			also display files given on the commandline.
76	root	1.140	- use a different algorithm for aio_close that is faster
77			and probably has even lower chances of blocking.
78	root	1.138	- do our own stack memory management for threads - linux
79			allocates outrageous amounts of VM (not so bad unless you
80			use mlockall...), which severely limits the number of threads
81	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
82			and 4096 * sizeof (long) (usually this is 16..64k).
83	root	1.137
84	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
85	root	1.134	- added aio_sync.
86	root	1.135	- added aio_pathsync.
87	root	1.136	- fix prototypes of (void) functions.
88	root	1.134
89	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
90			- perlio isn't generally threadsafe, so aio_close could not work reliably.
91			aio_close now tries a safe hack that might not be that asynchronous
92			(see the manpage for details).
93			- discard callback return values as to not grow the stack endlessly
94			when poll_cb handles many requests without returning.
95			- minor code cleanups.
96
97	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
98	root	1.131	- replaced _fd2fh with faster xs code.
99			- aio_close will now try to do "the right thing" and thus might
100			work sensibly for the very first time.
101
102	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
103	root	1.129	- after fork, invest some work to make sure that the poll_fileno
104			stays stable (by dup2'ing the new fd over the old one), to make
105			it easier for programs/libs that don't control their forking
106			behaviour and cannot recreate their watchers.
107
108	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
109	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
110			successfully demonstrated that you can block on futimes...).
111	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
112			internally (useful for sockets or O_APPEND handles).
113	root	1.126	- allow undef for length in aio_write.
114			- negative dataoffsets work as expected now in aio_read/aio_write.
115	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
116	root	1.125	have a larger range then.
117	root	1.120	- shared code between BDB and IO::AIO.
118	root	1.127	- aio_busy was completely broken. now fixed.
119			- readahead emulation now returns something.
120	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
121			(should never happen, though).
122	root	1.127	- large changes to make it partially compile and run on win32,
123			but win32 lacks too much functionality, and perl overrides way
124			too many functions with crashing versions.
125	root	1.120
126	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
127			- fix install path (Andreas J. Koenig).
128
129	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
130	root	1.114	- added aio_rmtree.
131	root	1.115	- wow, aio_mkdir was missing.
132	root	1.116	- aio_load did return undef on error, not -1.
133	root	1.117	- use prefixexp not prefix in autoconf.pm
134			(suggested by ... rt.cpan.org unreachable).
135	root	1.118	- avoid installing autoconf.pm.
136	root	1.114
137	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
138	root	1.112	- added aio_load.
139
140	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
141			- fix off-by-one bug in aio_read, causing memory corruption
142			or crashes.
143
144	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
145	root	1.108	- minor doc updates.
146	root	1.107	- minor cleanups.
147			- IO::AIO::poll returns request count.
148	root	1.109	- undocumented and unfinished async-signal-reporting.
149	root	1.107
150	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
151	root	1.100	- minor doc updates.
152	root	1.101	- added aio_readlink.
153			- properly zero-terminate aio_read buffer.
154			- fix aio_read/write with nonzero dataoffset.
155	root	1.104	- reduced size of aio request structure.
156	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
157	root	1.105	do not leak request in that case, either.
158	root	1.94
159	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
160	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
161			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
162	root	1.95	- fix a bug in aio_move where it would fail everytime
163			it would have to copy files manually.
164	root	1.98	- doc updates.
165	root	1.94	- start threads only on (very low) demand.
166	root	1.97	- end superfluous threads automatically after 10s idling.
167	root	1.98	- add IO::AIO::max_idle to control this.
168	root	1.94	- some tuning applied to random places.
169	root	1.95	- add aio_mknod.
170	root	1.59
171	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
172	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
173	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
174	root	1.68	- aio requests can be cancelled.
175	root	1.81	- callbacks can be (re-)set later.
176	root	1.93	- aio requests can choose between 9 priorities.
177	root	1.83	- add aio_group: aio requests can be grouped
178			into composite requests.
179			- generator interface for groups.
180	root	1.89	- add IO::AIO::poll_some.
181	root	1.72	- major documentation improvements.
182			- very minor bugfixes.
183	root	1.76	- add aio_nop for dummy requests.
184	root	1.84	- add aio_busy mainly for benchmarking and debugging.
185	root	1.79	- use "fast" mutexes on linux.
186	root	1.80	- use dynamic (and larger) buffers instead of
187			putting them onto the stack.
188			- optimise x86 and amd64 a bit.
189			- better error checking when ENOMEM.
190	root	1.85	- hopefully fix mem and dirp leaks on fork.
191	root	1.92	- warn about broken perl malloc.
192	root	1.88	- compiles on cygwin (but pread is broken on cygwin
193			which is not detected by autoconf, so you have to
194			edit autoconf/config.h yourself to enable emulation).
195	root	1.68
196	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
197	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
198
199	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
200			- codename "jost"
201			- AIX/Solaris(?) aren't being helpful again, hardcode a value
202			for NAME_MAX and drive with your eyes closed (reported by
203			wcooley@nakedape.cc).
204	root	1.63
205	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
206	root	1.61	- another minor bug in aio_scandir, again, the callback was called
207			twice when the directory can't be stat'ed.
208
209	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
210			- grr, another minor bug in aio_scandir, this time resulting
211			in a runtime error.
212
213	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
214	root	1.58	- aio_scandir errornously called callback twice in some cases.
215	root	1.57	- added AnyEvent example.
216
217	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
218	root	1.54	- no longer include $Config{libs}, as distros include too much
219	root	1.56	garbage in there that is not installed on typical systems
220	root	1.54	(for example, debian links perl against -lgdbm and many more
221			libraries despite perl not needing it, slowing down startup and
222			wasting memory).
223
224	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
225			- added aio_readdir, aio_scandir.
226	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
227			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
228			support is unavailable on my solaris 8 machine, but preliminary
229			code is there. What's lacking is configury stuff and testing...).
230	root	1.46
231	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
232	root	1.51	- create the aio threads on demand only (good after forking).
233	root	1.41	- somebody nagged about C89 compatibility, so this release should
234	root	1.42	be C89 compatible, but no guarantees for future ones.
235	root	1.43	- abort when the configure script fails.
236	root	1.41
237	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
238	root	1.93	- forgot to recreate the pipe after forking, this could cause
239	root	1.40	deadlocks.
240
241	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
242	root	1.33	- properly propagate exceptions from callbacks, instead of silently
243			eating them.
244	root	1.38	- use a different fork algorithm that avoids recursive callback
245			invocations and reduces fork latency in busy processes.
246	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
247			length after reading.
248			- fix a bug where the child would process some outstanding requests
249			from the parent.
250			- make a copy of the callback scalar, to avoid some very uncommon
251			(but valid) usages where the callback scalar changes.
252			- the callback was never freed in aio_read/aio_write.
253	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
254			scalar for better error reporting.
255	root	1.33
256	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
257			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
258	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
259			the external filename encoding first.
260	root	1.32	- fix the bug where filehandles could leak (again).
261	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
262			with your underdocumented, broken and outdated OS.
263			- fork'ing should now be officially supported (where linux and
264			posix contradict each other, I followed posix).
265	root	1.32	- only call read() once per poll, not twice (speedup).
266			- new functions: aio_rmdir, aio_symlink.
267	root	1.31	- force callback arguments to be undef or a reference, for better
268			error catching.
269	root	1.1
270	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
271	root	1.25	- added configure script to detect availability of some calls.
272	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
273	root	1.23	feedback yet).
274	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
275			and readahead via manual reading on platforms lacking those.
276	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
277			from Linux::AIO.
278	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
279			compile with it enabled. Probably breaks others. Oh well.
280	root	1.24	- try to be more careful with errno on non-threaded perls.
281	root	1.26	- cygwins perl insisted on a matching open mode when morphing
282			the fd to an fh.
283	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
284			do that for pathnames, too, in the future, so make sure you
285			properly encode your pathnames.
286	root	1.18
287	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
288			- aio_open did not reliably deliver (open) filehandles.
289	root	1.16	- all aio_*-functions keep a reference to the filehandle so
290			it doesn't go away while the aio requests is working on it.
291			- disable warnings in AIO.pm.
292
293	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
294			- allow recursive calls to poll_cb, use less locking calls, too.
295			- fix the Gtk2-example in the SYNOPSIS.
296	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
297			from Linux::AIO.
298			(found by compiling on cygwin. Unfortunately, cygwin declares but
299			does not implement pread/pwrite).
300			- only include <sys/syscall.h> on linux.
301
302	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
303	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
304			need it anyway.
305			- link against -lrt, as it might contain goodies such as fdatasync,
306			and often aio_read, which we do not use yet, but it shouldn't hurt.
307
308	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
309	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
310	root	1.10	- make callback argument optional for all calls.
311	root	1.8
312	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
313	root	1.5	- restructured manpage.
314	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
315			- remove explicit context support so I don't have to maintain
316			it for threaded perls (i.e. it should work now :).
317	root	1.5
318	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
319	root	1.2	- return immediately from poll_wait if nreqs==0.
320			- get rid of the request pipe and use faster thread-thread
321	root	1.3	communications for most requests and responses.
322	root	1.2
323	root	1.1	0.1
324			- cloned from Linux::AIO, which is very similar.
325