[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

3.18 Sun Apr 19 21:17:32 CEST 2009
        - better diagnostics when some aio_* functions get passed an illegal fh.
        - try to avoid crashes due to incompatible 5.10 API changes. grmbl.

3.17 Thu Nov 20 08:45:36 CET 2008
        - (libeio) added aio_sync_file_range (untested).
        - add aio_busy to @IO::AIO::AIO_REQ.

3.16 Wed Oct 22 18:28:01 CEST 2008
        - use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
          part to improve portability to perl 5.8 (reported by szymon).

3.15 Mon Oct 13 00:39:55 CEST 2008
        - automatic removal of feeders was broken.
        - (libeio) use a more robust method to detect whether a feeder
          has added something to the group or not.

3.1  Thu Oct  2 13:34:40 CEST 2008
        - pre-deref the passed callback object, for increased speed
          and decreased memory usage.
        - call on_next_submit callback even for aio_group - impact unknown,
          but seems more correct.
        - $req->cb now returns the original callback.
        - (libeio) pass EIO_GROUP/aio_group requests through the queue without
          requiring a thread switch.
        - (libeio) status code of aio_futime and aio_utime was always passed 0.
        - do some other µ-optimisations.

3.07 Sat Aug  2 16:06:13 CEST 2008
        - do not include LIBS in autoconf tests.

3.06 Tue Jul 15 12:41:32 CEST 2008
        - move preadwritelock definition before it's first reference,
          to make it compile again on broken platforms (they still exist)
          or badly cofngiured perls (redhat...), reported by Rob Bloodgood.

3.05 Thu Jun 19 23:23:52 CEST 2008
        - work around perl overriding readdir etc. with thread-unsafe
          (sic!) versions.

3.04 Wed Jun 18 01:35:38 CEST 2008
        - (libeio) fix eio_mknod, which confused it's arguments.
        - (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
          is stupid.
        - (libeio) fix eio__readahead prototype, patch by Jost Krieger.
        - (libeio) fix a bug that could potentially cause IO::AIO
          not to get initialised properly.

3.03 Thu May 29 05:33:30 CEST 2008
        - (libeio) correctly call pthread_attr_destroy ().
        - (libeio) work around broken bsd headers once more.
        - reduce shared library size again by not including wrappers.
        - max_outstanding could cause poll to enter a busy-waiting loop.
        - document the new IO::AIO::poll_cb result value.

3.02 Mon May 12 02:32:02 CEST 2008
        - fix a memory leak on aio_readlink.
        - bring back working fchmod.
        - nop and busy now set result to 0.
        - set errno to ENOMEM when allocation fails.

3.01 Sun May 11 03:07:03 CEST 2008
        - (libeio) make it compile on systems without readahead or readdir_r.
        - (libeio) improve configure check for readahead availability.
        - do not try to link against -lrt.
        - use a separate configure script for IO::AIO (not the libeio one).

3.0  Sun May 11 00:57:14 CEST 2008
        - added bin/treescan to the distribution.
        - switched to using libeio.
        - LOTS OF INCOMPATIBLE CHANGES:
          - remove signal functionality, it is not worth the effort.
          - max_outstanding no longer returns the previous number of requests.
          - poll_cb no longer returns number of requests.

2.62 Sat Apr 26 13:59:33 CEST 2008
        - port to solaris perls configured for old posix
          (analysed by Jost Krieger).
        - keep a reference to the perl filehandle object in aio_close,
          so it doesn't get closed prematurely, leading to ugly races.

2.61 Wed Apr 16 18:45:02 CEST 2008
        - fix treescan output duplication and improve output ordering.
          also display files given on the commandline.
        - use a different algorithm for aio_close that is faster
          and probably has even lower chances of blocking.
        - do our own stack memory management for threads - linux
          allocates outrageous amounts of VM (not so bad unless you
          use mlockall...), which severely limits the number of threads
          on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
          and 4096 * sizeof (long) (usually this is 16..64k).

2.6  Sun Mar 30 08:28:11 CEST 2008
        - added aio_sync.
        - added aio_pathsync.
        - fix prototypes of (void) functions.

2.51 Sat Oct  6 16:04:54 CEST 2007
        - perlio isn't generally threadsafe, so aio_close could not work reliably.
          aio_close now tries a safe hack that might not be that asynchronous
          (see the manpage for details).
        - discard callback return values as to not grow the stack endlessly
          when poll_cb handles many requests without returning.
        - minor code cleanups.

2.5  Thu Oct  4 14:49:08 CEST 2007
        - replaced _fd2fh with faster xs code.
        - aio_close will now try to do "the right thing" and thus might
          work sensibly for the very first time.

2.41 Mon Sep 24 21:28:21 CEST 2007
        - after fork, invest some work to make sure that the poll_fileno
          stays stable (by dup2'ing the new fd over the old one), to make
          it easier for programs/libs that don't control their forking
          behaviour and cannot recreate their watchers.

2.4  Sun Aug  5 18:44:22 CEST 2007
        - add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
          successfully demonstrated that you can block on futimes...).
        - allow undef as fileoffset for aio_read/write and use read/write(2)
          internally (useful for sockets or O_APPEND handles).
        - allow undef for length in aio_write.
        - negative dataoffsets work as expected now in aio_read/aio_write.
        - use NV instead of UV for 32 bit perls and file offsets, as NVs
          have a larger range then.
        - shared code between BDB and IO::AIO.
        - aio_busy was completely broken. now fixed.
        - readahead emulation now returns something.
        - correctly set errno to ENOSYS on unimplemented functions
          (should never happen, though).
        - large changes to make it partially compile and run on win32,
          but win32 lacks too much functionality, and perl overrides way
          too many functions with crashing versions.

2.33 Tue Jan 23 23:55:41 CET 2007
        - fix install path (Andreas J. Koenig).

2.32 Mon Jan 22 16:56:23 CET 2007
        - added aio_rmtree.
        - wow, aio_mkdir was missing.
        - aio_load did return undef on error, not -1.
        - use prefixexp not prefix in autoconf.pm
          (suggested by ... rt.cpan.org unreachable).
        - avoid installing autoconf.pm.

2.31 Sat Jan  6 03:46:02 CET 2007
        - added aio_load.

2.3  Sat Dec 23 05:48:07 CET 2006
        - fix off-by-one bug in aio_read, causing memory corruption
          or crashes.

2.21  Fri Dec 22 05:03:38 CET 2006
        - minor doc updates.
        - minor cleanups.
        - IO::AIO::poll returns request count.
        - undocumented and unfinished async-signal-reporting.

2.2  Tue Oct 31 00:31:00 CET 2006
        - minor doc updates.
        - added aio_readlink.
        - properly zero-terminate aio_read buffer.
        - fix aio_read/write with nonzero dataoffset.
        - reduced size of aio request structure.
        - better diagnostics when pathnames etc. are not byte-encoded;
          do not leak request in that case, either.

2.1  Sun Oct 29 02:01:57 CET 2006
        - INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
          IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
        - fix a bug in aio_move where it would fail everytime
          it would have to copy files manually.
        - doc updates.
        - start threads only on (very low) demand.
        - end superfluous threads automatically after 10s idling.
        - add IO::AIO::max_idle to control this.
        - some tuning applied to random places.
        - add aio_mknod.

2.0  Thu Oct 26 18:27:58 CEST 2006
        - minor incompatibility: max_outstanding semantics have changed.
        - major rewrite, consider all functionality EXPERIMENTAL.
        - aio requests can be cancelled.
        - callbacks can be (re-)set later.
        - aio requests can choose between 9 priorities.
        - add aio_group: aio requests can be grouped
          into composite requests.
        - generator interface for groups.
        - add IO::AIO::poll_some.
        - major documentation improvements.
        - very minor bugfixes.
        - add aio_nop for dummy requests.
        - add aio_busy mainly for benchmarking and debugging.
        - use "fast" mutexes on linux.
        - use dynamic (and larger) buffers instead of
          putting them onto the stack.
        - optimise x86 and amd64 a bit.
        - better error checking when ENOMEM.
        - hopefully fix mem and dirp leaks on fork.
        - warn about broken perl malloc.
        - compiles on cygwin (but pread is broken on cygwin
          which is not detected by autoconf, so you have to
          edit autoconf/config.h yourself to enable emulation).

1.8  Sat Jun 24 22:20:44 CEST 2006
        - add and/or document aio_rename, aio_link, aio_symlink and aio_move.

1.73 Wed Mar  1 22:49:32 CET 2006
        - codename "jost"
        - AIX/Solaris(?) aren't being helpful again, hardcode a value
          for NAME_MAX and drive with your eyes closed (reported by
          wcooley@nakedape.cc).

1.72 Thu Feb  2 00:40:44 CET 2006
        - another minor bug in aio_scandir, again, the callback was called
          twice when the directory can't be stat'ed.

1.71 Mon Dec 26 20:20:03 CET 2005
        - grr, another minor bug in aio_scandir, this time resulting
          in a runtime error.

1.7  Mon Dec 26 19:29:48 CET 2005
        - aio_scandir errornously called callback twice in some cases.
        - added AnyEvent example.

1.61 Wed Sep  7 19:40:42 CEST 2005
        - no longer include $Config{libs}, as distros include too much
          garbage in there that is not installed on typical systems
          (for example, debian links perl against -lgdbm and many more
          libraries despite perl not needing it, slowing down startup and
          wasting memory).

1.6  Tue Aug 30 17:44:44 CEST 2005
        - added aio_readdir, aio_scandir.
        - added aio_sendfile, including sendfile emulation when sendfile
          isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
          support is unavailable on my solaris 8 machine, but preliminary
          code is there. What's lacking is configury stuff and testing...).

1.5  Sat Aug 20 02:32:19 CEST 2005
        - create the aio threads on demand only (good after forking).
        - somebody nagged about C89 compatibility, so this release should
          be C89 compatible, but no guarantees for future ones.
        - abort when the configure script fails.

1.4  Wed Aug 17 08:07:27 CEST 2005
        - forgot to recreate the pipe after forking, this could cause
          deadlocks.

1.3  Wed Aug 17 07:25:54 CEST 2005
        - properly propagate exceptions from callbacks, instead of silently
          eating them.
        - use a different fork algorithm that avoids recursive callback
          invocations and reduces fork latency in busy processes.
        - fix a bug where the buffer scalar in aio_read got assigned the wrong
          length after reading.
        - fix a bug where the child would process some outstanding requests
          from the parent.
        - make a copy of the callback scalar, to avoid some very uncommon
          (but valid) usages where the callback scalar changes.
        - the callback was never freed in aio_read/aio_write.
        - aio_read/aio_write will now set the readonly flag on the data
          scalar for better error reporting.

1.2  Wed Aug 17 01:22:58 CEST 2005
        - verified on cygwin, linux/amd64+ia32+alpha, solaris.
        - use SvPVbyte for filenames now. You *need* to encode your strings to
          the external filename encoding first.
        - fix the bug where filehandles could leak (again).
        - clarify freebsd situation: make it work and tell me how, or go away
          with your underdocumented, broken and outdated OS.
        - fork'ing should now be officially supported (where linux and
          posix contradict each other, I followed posix).
        - only call read() once per poll, not twice (speedup).
        - new functions: aio_rmdir, aio_symlink.
        - force callback arguments to be undef or a reference, for better
          error catching.

1.1  Sun Aug  7 05:27:23 CEST 2005
        - added configure script to detect availability of some calls.
          (imperfect, as we cannot detect things like -lrt due to missing
          feedback yet).
        - emulate fdatasync via fsync, pread/pwrite via unsafe read/write
          and readahead via manual reading on platforms lacking those.
        - ported t/03_errors.t+framework by Brad Fitzpatrick
          from Linux::AIO.
        - removed XOPEN_SOURCE because stupid solaris 9 doesn't
          compile with it enabled. Probably breaks others. Oh well.
        - try to be more careful with errno on non-threaded perls.
        - cygwins perl insisted on a matching open mode when morphing
          the fd to an fh.
        - convert sv's to "byte" encoding in aio_read/aio_write. Might
          do that for pathnames, too, in the future, so make sure you
          properly encode your pathnames.

1.0  Fri Jul 22 10:43:30 CEST 2005
        - aio_open did not reliably deliver (open) filehandles.
        - all aio_*-functions keep a reference to the filehandle so
          it doesn't go away while the aio requests is working on it.
        - disable warnings in AIO.pm.

0.9  Wed Jul 20 23:55:04 CEST 2005
        - allow recursive calls to poll_cb, use less locking calls, too.
        - fix the Gtk2-example in the SYNOPSIS.
        - use pread/pwrite not pread64/pwrite64. this was simply a leftover
          from Linux::AIO.
          (found by compiling on cygwin. Unfortunately, cygwin declares but
          does not implement pread/pwrite).
        - only include <sys/syscall.h> on linux.

0.5  Tue Jul 12 13:03:09 CEST 2005
        - removed #include <endian.h>, it's not portable, and we don't
          need it anyway.
        - link against -lrt, as it might contain goodies such as fdatasync,
          and often aio_read, which we do not use yet, but it shouldn't hurt.

0.4  Mon Jul 11 05:28:25 CEST 2005
        - added IO::AIO::flush, IO::AIO::poll.
        - make callback argument optional for all calls.

0.3  Mon Jul 11 01:42:37 CEST 2005
        - restructured manpage.
        - added SYNOPSIS with examples for Event, Glib, Tk.
        - remove explicit context support so I don't have to maintain
          it for threaded perls (i.e. it should work now :).

0.2  Sun Jul 10 22:57:12 CEST 2005
        - return immediately from poll_wait if nreqs==0.
        - get rid of the request pipe and use faster thread-thread
          communications for most requests and responses.

0.1
        - cloned from Linux::AIO, which is very similar.

Revision:	1.180
Committed:	Sun Apr 19 19:17:59 2009 UTC (15 years, 1 month ago) by root
Branch:	MAIN
CVS Tags:	rel-3_18
Changes since 1.179:	+2 -1 lines
Log Message:	3.18
#	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	1.180	3.18 Sun Apr 19 21:17:32 CEST 2009
10	root	1.179	- better diagnostics when some aio_* functions get passed an illegal fh.
11	root	1.180	- try to avoid crashes due to incompatible 5.10 API changes. grmbl.
12	root	1.178
13	root	1.177	3.17 Thu Nov 20 08:45:36 CET 2008
14	root	1.176	- (libeio) added aio_sync_file_range (untested).
15	root	1.177	- add aio_busy to @IO::AIO::AIO_REQ.
16	root	1.175
17	root	1.174	3.16 Wed Oct 22 18:28:01 CEST 2008
18	root	1.173	- use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
19			part to improve portability to perl 5.8 (reported by szymon).
20
21	root	1.172	3.15 Mon Oct 13 00:39:55 CEST 2008
22	root	1.171	- automatic removal of feeders was broken.
23			- (libeio) use a more robust method to detect whether a feeder
24			has added something to the group or not.
25
26	root	1.170	3.1 Thu Oct 2 13:34:40 CEST 2008
27	root	1.168	- pre-deref the passed callback object, for increased speed
28			and decreased memory usage.
29	root	1.167	- call on_next_submit callback even for aio_group - impact unknown,
30	root	1.166	but seems more correct.
31	root	1.168	- $req->cb now returns the original callback.
32	root	1.166	- (libeio) pass EIO_GROUP/aio_group requests through the queue without
33			requiring a thread switch.
34	root	1.169	- (libeio) status code of aio_futime and aio_utime was always passed 0.
35	root	1.166	- do some other µ-optimisations.
36
37	root	1.165	3.07 Sat Aug 2 16:06:13 CEST 2008
38			- do not include LIBS in autoconf tests.
39
40	root	1.164	3.06 Tue Jul 15 12:41:32 CEST 2008
41	root	1.162	- move preadwritelock definition before it's first reference,
42	root	1.164	to make it compile again on broken platforms (they still exist)
43			or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
44	root	1.162
45	root	1.161	3.05 Thu Jun 19 23:23:52 CEST 2008
46	root	1.160	- work around perl overriding readdir etc. with thread-unsafe
47	root	1.161	(sic!) versions.
48	root	1.160
49	root	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
50			- (libeio) fix eio_mknod, which confused it's arguments.
51	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
52			is stupid.
53	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
54			- (libeio) fix a bug that could potentially cause IO::AIO
55			not to get initialised properly.
56	root	1.158
57	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
58	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
59	root	1.155	- (libeio) work around broken bsd headers once more.
60	root	1.154	- reduce shared library size again by not including wrappers.
61	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
62			- document the new IO::AIO::poll_cb result value.
63	root	1.153
64	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
65	root	1.150	- fix a memory leak on aio_readlink.
66			- bring back working fchmod.
67	root	1.151	- nop and busy now set result to 0.
68			- set errno to ENOMEM when allocation fails.
69	root	1.150
70	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
71			- (libeio) make it compile on systems without readahead or readdir_r.
72	root	1.148	- (libeio) improve configure check for readahead availability.
73			- do not try to link against -lrt.
74	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
75
76	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
77	root	1.145	- added bin/treescan to the distribution.
78			- switched to using libeio.
79			- LOTS OF INCOMPATIBLE CHANGES:
80			- remove signal functionality, it is not worth the effort.
81			- max_outstanding no longer returns the previous number of requests.
82			- poll_cb no longer returns number of requests.
83	root	1.143
84	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
85	root	1.141	- port to solaris perls configured for old posix
86			(analysed by Jost Krieger).
87	root	1.142	- keep a reference to the perl filehandle object in aio_close,
88			so it doesn't get closed prematurely, leading to ugly races.
89	root	1.141
90	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
91	root	1.137	- fix treescan output duplication and improve output ordering.
92			also display files given on the commandline.
93	root	1.140	- use a different algorithm for aio_close that is faster
94			and probably has even lower chances of blocking.
95	root	1.138	- do our own stack memory management for threads - linux
96			allocates outrageous amounts of VM (not so bad unless you
97			use mlockall...), which severely limits the number of threads
98	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
99			and 4096 * sizeof (long) (usually this is 16..64k).
100	root	1.137
101	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
102	root	1.134	- added aio_sync.
103	root	1.135	- added aio_pathsync.
104	root	1.136	- fix prototypes of (void) functions.
105	root	1.134
106	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
107			- perlio isn't generally threadsafe, so aio_close could not work reliably.
108			aio_close now tries a safe hack that might not be that asynchronous
109			(see the manpage for details).
110			- discard callback return values as to not grow the stack endlessly
111			when poll_cb handles many requests without returning.
112			- minor code cleanups.
113
114	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
115	root	1.131	- replaced _fd2fh with faster xs code.
116			- aio_close will now try to do "the right thing" and thus might
117			work sensibly for the very first time.
118
119	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
120	root	1.129	- after fork, invest some work to make sure that the poll_fileno
121			stays stable (by dup2'ing the new fd over the old one), to make
122			it easier for programs/libs that don't control their forking
123			behaviour and cannot recreate their watchers.
124
125	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
126	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
127			successfully demonstrated that you can block on futimes...).
128	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
129			internally (useful for sockets or O_APPEND handles).
130	root	1.126	- allow undef for length in aio_write.
131			- negative dataoffsets work as expected now in aio_read/aio_write.
132	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
133	root	1.125	have a larger range then.
134	root	1.120	- shared code between BDB and IO::AIO.
135	root	1.127	- aio_busy was completely broken. now fixed.
136			- readahead emulation now returns something.
137	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
138			(should never happen, though).
139	root	1.127	- large changes to make it partially compile and run on win32,
140			but win32 lacks too much functionality, and perl overrides way
141			too many functions with crashing versions.
142	root	1.120
143	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
144			- fix install path (Andreas J. Koenig).
145
146	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
147	root	1.114	- added aio_rmtree.
148	root	1.115	- wow, aio_mkdir was missing.
149	root	1.116	- aio_load did return undef on error, not -1.
150	root	1.117	- use prefixexp not prefix in autoconf.pm
151			(suggested by ... rt.cpan.org unreachable).
152	root	1.118	- avoid installing autoconf.pm.
153	root	1.114
154	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
155	root	1.112	- added aio_load.
156
157	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
158			- fix off-by-one bug in aio_read, causing memory corruption
159			or crashes.
160
161	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
162	root	1.108	- minor doc updates.
163	root	1.107	- minor cleanups.
164			- IO::AIO::poll returns request count.
165	root	1.109	- undocumented and unfinished async-signal-reporting.
166	root	1.107
167	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
168	root	1.100	- minor doc updates.
169	root	1.101	- added aio_readlink.
170			- properly zero-terminate aio_read buffer.
171			- fix aio_read/write with nonzero dataoffset.
172	root	1.104	- reduced size of aio request structure.
173	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
174	root	1.105	do not leak request in that case, either.
175	root	1.94
176	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
177	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
178			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
179	root	1.95	- fix a bug in aio_move where it would fail everytime
180			it would have to copy files manually.
181	root	1.98	- doc updates.
182	root	1.94	- start threads only on (very low) demand.
183	root	1.97	- end superfluous threads automatically after 10s idling.
184	root	1.98	- add IO::AIO::max_idle to control this.
185	root	1.94	- some tuning applied to random places.
186	root	1.95	- add aio_mknod.
187	root	1.59
188	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
189	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
190	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
191	root	1.68	- aio requests can be cancelled.
192	root	1.81	- callbacks can be (re-)set later.
193	root	1.93	- aio requests can choose between 9 priorities.
194	root	1.83	- add aio_group: aio requests can be grouped
195			into composite requests.
196			- generator interface for groups.
197	root	1.89	- add IO::AIO::poll_some.
198	root	1.72	- major documentation improvements.
199			- very minor bugfixes.
200	root	1.76	- add aio_nop for dummy requests.
201	root	1.84	- add aio_busy mainly for benchmarking and debugging.
202	root	1.79	- use "fast" mutexes on linux.
203	root	1.80	- use dynamic (and larger) buffers instead of
204			putting them onto the stack.
205			- optimise x86 and amd64 a bit.
206			- better error checking when ENOMEM.
207	root	1.85	- hopefully fix mem and dirp leaks on fork.
208	root	1.92	- warn about broken perl malloc.
209	root	1.88	- compiles on cygwin (but pread is broken on cygwin
210			which is not detected by autoconf, so you have to
211			edit autoconf/config.h yourself to enable emulation).
212	root	1.68
213	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
214	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
215
216	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
217			- codename "jost"
218			- AIX/Solaris(?) aren't being helpful again, hardcode a value
219			for NAME_MAX and drive with your eyes closed (reported by
220			wcooley@nakedape.cc).
221	root	1.63
222	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
223	root	1.61	- another minor bug in aio_scandir, again, the callback was called
224			twice when the directory can't be stat'ed.
225
226	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
227			- grr, another minor bug in aio_scandir, this time resulting
228			in a runtime error.
229
230	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
231	root	1.58	- aio_scandir errornously called callback twice in some cases.
232	root	1.57	- added AnyEvent example.
233
234	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
235	root	1.54	- no longer include $Config{libs}, as distros include too much
236	root	1.56	garbage in there that is not installed on typical systems
237	root	1.54	(for example, debian links perl against -lgdbm and many more
238			libraries despite perl not needing it, slowing down startup and
239			wasting memory).
240
241	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
242			- added aio_readdir, aio_scandir.
243	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
244			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
245			support is unavailable on my solaris 8 machine, but preliminary
246			code is there. What's lacking is configury stuff and testing...).
247	root	1.46
248	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
249	root	1.51	- create the aio threads on demand only (good after forking).
250	root	1.41	- somebody nagged about C89 compatibility, so this release should
251	root	1.42	be C89 compatible, but no guarantees for future ones.
252	root	1.43	- abort when the configure script fails.
253	root	1.41
254	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
255	root	1.93	- forgot to recreate the pipe after forking, this could cause
256	root	1.40	deadlocks.
257
258	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
259	root	1.33	- properly propagate exceptions from callbacks, instead of silently
260			eating them.
261	root	1.38	- use a different fork algorithm that avoids recursive callback
262			invocations and reduces fork latency in busy processes.
263	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
264			length after reading.
265			- fix a bug where the child would process some outstanding requests
266			from the parent.
267			- make a copy of the callback scalar, to avoid some very uncommon
268			(but valid) usages where the callback scalar changes.
269			- the callback was never freed in aio_read/aio_write.
270	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
271			scalar for better error reporting.
272	root	1.33
273	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
274			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
275	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
276			the external filename encoding first.
277	root	1.32	- fix the bug where filehandles could leak (again).
278	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
279			with your underdocumented, broken and outdated OS.
280			- fork'ing should now be officially supported (where linux and
281			posix contradict each other, I followed posix).
282	root	1.32	- only call read() once per poll, not twice (speedup).
283			- new functions: aio_rmdir, aio_symlink.
284	root	1.31	- force callback arguments to be undef or a reference, for better
285			error catching.
286	root	1.1
287	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
288	root	1.25	- added configure script to detect availability of some calls.
289	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
290	root	1.23	feedback yet).
291	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
292			and readahead via manual reading on platforms lacking those.
293	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
294			from Linux::AIO.
295	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
296			compile with it enabled. Probably breaks others. Oh well.
297	root	1.24	- try to be more careful with errno on non-threaded perls.
298	root	1.26	- cygwins perl insisted on a matching open mode when morphing
299			the fd to an fh.
300	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
301			do that for pathnames, too, in the future, so make sure you
302			properly encode your pathnames.
303	root	1.18
304	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
305			- aio_open did not reliably deliver (open) filehandles.
306	root	1.16	- all aio_*-functions keep a reference to the filehandle so
307			it doesn't go away while the aio requests is working on it.
308			- disable warnings in AIO.pm.
309
310	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
311			- allow recursive calls to poll_cb, use less locking calls, too.
312			- fix the Gtk2-example in the SYNOPSIS.
313	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
314			from Linux::AIO.
315			(found by compiling on cygwin. Unfortunately, cygwin declares but
316			does not implement pread/pwrite).
317			- only include <sys/syscall.h> on linux.
318
319	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
320	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
321			need it anyway.
322			- link against -lrt, as it might contain goodies such as fdatasync,
323			and often aio_read, which we do not use yet, but it shouldn't hurt.
324
325	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
326	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
327	root	1.10	- make callback argument optional for all calls.
328	root	1.8
329	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
330	root	1.5	- restructured manpage.
331	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
332			- remove explicit context support so I don't have to maintain
333			it for threaded perls (i.e. it should work now :).
334	root	1.5
335	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
336	root	1.2	- return immediately from poll_wait if nreqs==0.
337			- get rid of the request pipe and use faster thread-thread
338	root	1.3	communications for most requests and responses.
339	root	1.2
340	root	1.1	0.1
341			- cloned from Linux::AIO, which is very similar.
342