[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

        - better diagnostics when some aio_* functions get passed an illegal fh.
        - try to avoid crash due to incompatible 5.10 API changes.

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