[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

        - call on_next_submit callback even for aio_group - impact unknown,
          but seems more correct.
        - (libeio) pass EIO_GROUP/aio_group requests through the queue without
          requiring a thread switch.
        - 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:	1.167
Committed:	Tue Sep 30 13:17:38 2008 UTC (15 years, 7 months ago) by root
Branch:	MAIN
Changes since 1.166:	+1 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.31	Revision history for IO::AIO
2	root	1.30
3	root	1.59	TODO: better autoconf.pm that can return LIBS etc.
4	root	1.114	TODO: aio_cptree/mvtree
5	root	1.106	TODO: reduce condvar fairness: schedule hot-cache-threads first?
6	root	1.123	TODO: splice/tee/vmsplice/sync_file_range? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
7	root	1.136	TODO: aio_fcntl, at least for file-locking
8	root	1.100
9	root	1.167	- call on_next_submit callback even for aio_group - impact unknown,
10	root	1.166	but seems more correct.
11			- (libeio) pass EIO_GROUP/aio_group requests through the queue without
12			requiring a thread switch.
13			- do some other µ-optimisations.
14
15	root	1.165	3.07 Sat Aug 2 16:06:13 CEST 2008
16			- do not include LIBS in autoconf tests.
17
18	root	1.164	3.06 Tue Jul 15 12:41:32 CEST 2008
19	root	1.162	- move preadwritelock definition before it's first reference,
20	root	1.164	to make it compile again on broken platforms (they still exist)
21			or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
22	root	1.162
23	root	1.161	3.05 Thu Jun 19 23:23:52 CEST 2008
24	root	1.160	- work around perl overriding readdir etc. with thread-unsafe
25	root	1.161	(sic!) versions.
26	root	1.160
27	root	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
28			- (libeio) fix eio_mknod, which confused it's arguments.
29	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
30			is stupid.
31	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
32			- (libeio) fix a bug that could potentially cause IO::AIO
33			not to get initialised properly.
34	root	1.158
35	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
36	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
37	root	1.155	- (libeio) work around broken bsd headers once more.
38	root	1.154	- reduce shared library size again by not including wrappers.
39	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
40			- document the new IO::AIO::poll_cb result value.
41	root	1.153
42	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
43	root	1.150	- fix a memory leak on aio_readlink.
44			- bring back working fchmod.
45	root	1.151	- nop and busy now set result to 0.
46			- set errno to ENOMEM when allocation fails.
47	root	1.150
48	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
49			- (libeio) make it compile on systems without readahead or readdir_r.
50	root	1.148	- (libeio) improve configure check for readahead availability.
51			- do not try to link against -lrt.
52	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
53
54	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
55	root	1.145	- added bin/treescan to the distribution.
56			- switched to using libeio.
57			- LOTS OF INCOMPATIBLE CHANGES:
58			- remove signal functionality, it is not worth the effort.
59			- max_outstanding no longer returns the previous number of requests.
60			- poll_cb no longer returns number of requests.
61	root	1.143
62	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
63	root	1.141	- port to solaris perls configured for old posix
64			(analysed by Jost Krieger).
65	root	1.142	- keep a reference to the perl filehandle object in aio_close,
66			so it doesn't get closed prematurely, leading to ugly races.
67	root	1.141
68	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
69	root	1.137	- fix treescan output duplication and improve output ordering.
70			also display files given on the commandline.
71	root	1.140	- use a different algorithm for aio_close that is faster
72			and probably has even lower chances of blocking.
73	root	1.138	- do our own stack memory management for threads - linux
74			allocates outrageous amounts of VM (not so bad unless you
75			use mlockall...), which severely limits the number of threads
76	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
77			and 4096 * sizeof (long) (usually this is 16..64k).
78	root	1.137
79	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
80	root	1.134	- added aio_sync.
81	root	1.135	- added aio_pathsync.
82	root	1.136	- fix prototypes of (void) functions.
83	root	1.134
84	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
85			- perlio isn't generally threadsafe, so aio_close could not work reliably.
86			aio_close now tries a safe hack that might not be that asynchronous
87			(see the manpage for details).
88			- discard callback return values as to not grow the stack endlessly
89			when poll_cb handles many requests without returning.
90			- minor code cleanups.
91
92	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
93	root	1.131	- replaced _fd2fh with faster xs code.
94			- aio_close will now try to do "the right thing" and thus might
95			work sensibly for the very first time.
96
97	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
98	root	1.129	- after fork, invest some work to make sure that the poll_fileno
99			stays stable (by dup2'ing the new fd over the old one), to make
100			it easier for programs/libs that don't control their forking
101			behaviour and cannot recreate their watchers.
102
103	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
104	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
105			successfully demonstrated that you can block on futimes...).
106	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
107			internally (useful for sockets or O_APPEND handles).
108	root	1.126	- allow undef for length in aio_write.
109			- negative dataoffsets work as expected now in aio_read/aio_write.
110	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
111	root	1.125	have a larger range then.
112	root	1.120	- shared code between BDB and IO::AIO.
113	root	1.127	- aio_busy was completely broken. now fixed.
114			- readahead emulation now returns something.
115	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
116			(should never happen, though).
117	root	1.127	- large changes to make it partially compile and run on win32,
118			but win32 lacks too much functionality, and perl overrides way
119			too many functions with crashing versions.
120	root	1.120
121	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
122			- fix install path (Andreas J. Koenig).
123
124	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
125	root	1.114	- added aio_rmtree.
126	root	1.115	- wow, aio_mkdir was missing.
127	root	1.116	- aio_load did return undef on error, not -1.
128	root	1.117	- use prefixexp not prefix in autoconf.pm
129			(suggested by ... rt.cpan.org unreachable).
130	root	1.118	- avoid installing autoconf.pm.
131	root	1.114
132	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
133	root	1.112	- added aio_load.
134
135	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
136			- fix off-by-one bug in aio_read, causing memory corruption
137			or crashes.
138
139	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
140	root	1.108	- minor doc updates.
141	root	1.107	- minor cleanups.
142			- IO::AIO::poll returns request count.
143	root	1.109	- undocumented and unfinished async-signal-reporting.
144	root	1.107
145	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
146	root	1.100	- minor doc updates.
147	root	1.101	- added aio_readlink.
148			- properly zero-terminate aio_read buffer.
149			- fix aio_read/write with nonzero dataoffset.
150	root	1.104	- reduced size of aio request structure.
151	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
152	root	1.105	do not leak request in that case, either.
153	root	1.94
154	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
155	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
156			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
157	root	1.95	- fix a bug in aio_move where it would fail everytime
158			it would have to copy files manually.
159	root	1.98	- doc updates.
160	root	1.94	- start threads only on (very low) demand.
161	root	1.97	- end superfluous threads automatically after 10s idling.
162	root	1.98	- add IO::AIO::max_idle to control this.
163	root	1.94	- some tuning applied to random places.
164	root	1.95	- add aio_mknod.
165	root	1.59
166	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
167	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
168	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
169	root	1.68	- aio requests can be cancelled.
170	root	1.81	- callbacks can be (re-)set later.
171	root	1.93	- aio requests can choose between 9 priorities.
172	root	1.83	- add aio_group: aio requests can be grouped
173			into composite requests.
174			- generator interface for groups.
175	root	1.89	- add IO::AIO::poll_some.
176	root	1.72	- major documentation improvements.
177			- very minor bugfixes.
178	root	1.76	- add aio_nop for dummy requests.
179	root	1.84	- add aio_busy mainly for benchmarking and debugging.
180	root	1.79	- use "fast" mutexes on linux.
181	root	1.80	- use dynamic (and larger) buffers instead of
182			putting them onto the stack.
183			- optimise x86 and amd64 a bit.
184			- better error checking when ENOMEM.
185	root	1.85	- hopefully fix mem and dirp leaks on fork.
186	root	1.92	- warn about broken perl malloc.
187	root	1.88	- compiles on cygwin (but pread is broken on cygwin
188			which is not detected by autoconf, so you have to
189			edit autoconf/config.h yourself to enable emulation).
190	root	1.68
191	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
192	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
193
194	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
195			- codename "jost"
196			- AIX/Solaris(?) aren't being helpful again, hardcode a value
197			for NAME_MAX and drive with your eyes closed (reported by
198			wcooley@nakedape.cc).
199	root	1.63
200	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
201	root	1.61	- another minor bug in aio_scandir, again, the callback was called
202			twice when the directory can't be stat'ed.
203
204	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
205			- grr, another minor bug in aio_scandir, this time resulting
206			in a runtime error.
207
208	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
209	root	1.58	- aio_scandir errornously called callback twice in some cases.
210	root	1.57	- added AnyEvent example.
211
212	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
213	root	1.54	- no longer include $Config{libs}, as distros include too much
214	root	1.56	garbage in there that is not installed on typical systems
215	root	1.54	(for example, debian links perl against -lgdbm and many more
216			libraries despite perl not needing it, slowing down startup and
217			wasting memory).
218
219	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
220			- added aio_readdir, aio_scandir.
221	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
222			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
223			support is unavailable on my solaris 8 machine, but preliminary
224			code is there. What's lacking is configury stuff and testing...).
225	root	1.46
226	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
227	root	1.51	- create the aio threads on demand only (good after forking).
228	root	1.41	- somebody nagged about C89 compatibility, so this release should
229	root	1.42	be C89 compatible, but no guarantees for future ones.
230	root	1.43	- abort when the configure script fails.
231	root	1.41
232	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
233	root	1.93	- forgot to recreate the pipe after forking, this could cause
234	root	1.40	deadlocks.
235
236	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
237	root	1.33	- properly propagate exceptions from callbacks, instead of silently
238			eating them.
239	root	1.38	- use a different fork algorithm that avoids recursive callback
240			invocations and reduces fork latency in busy processes.
241	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
242			length after reading.
243			- fix a bug where the child would process some outstanding requests
244			from the parent.
245			- make a copy of the callback scalar, to avoid some very uncommon
246			(but valid) usages where the callback scalar changes.
247			- the callback was never freed in aio_read/aio_write.
248	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
249			scalar for better error reporting.
250	root	1.33
251	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
252			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
253	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
254			the external filename encoding first.
255	root	1.32	- fix the bug where filehandles could leak (again).
256	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
257			with your underdocumented, broken and outdated OS.
258			- fork'ing should now be officially supported (where linux and
259			posix contradict each other, I followed posix).
260	root	1.32	- only call read() once per poll, not twice (speedup).
261			- new functions: aio_rmdir, aio_symlink.
262	root	1.31	- force callback arguments to be undef or a reference, for better
263			error catching.
264	root	1.1
265	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
266	root	1.25	- added configure script to detect availability of some calls.
267	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
268	root	1.23	feedback yet).
269	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
270			and readahead via manual reading on platforms lacking those.
271	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
272			from Linux::AIO.
273	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
274			compile with it enabled. Probably breaks others. Oh well.
275	root	1.24	- try to be more careful with errno on non-threaded perls.
276	root	1.26	- cygwins perl insisted on a matching open mode when morphing
277			the fd to an fh.
278	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
279			do that for pathnames, too, in the future, so make sure you
280			properly encode your pathnames.
281	root	1.18
282	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
283			- aio_open did not reliably deliver (open) filehandles.
284	root	1.16	- all aio_*-functions keep a reference to the filehandle so
285			it doesn't go away while the aio requests is working on it.
286			- disable warnings in AIO.pm.
287
288	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
289			- allow recursive calls to poll_cb, use less locking calls, too.
290			- fix the Gtk2-example in the SYNOPSIS.
291	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
292			from Linux::AIO.
293			(found by compiling on cygwin. Unfortunately, cygwin declares but
294			does not implement pread/pwrite).
295			- only include <sys/syscall.h> on linux.
296
297	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
298	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
299			need it anyway.
300			- link against -lrt, as it might contain goodies such as fdatasync,
301			and often aio_read, which we do not use yet, but it shouldn't hurt.
302
303	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
304	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
305	root	1.10	- make callback argument optional for all calls.
306	root	1.8
307	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
308	root	1.5	- restructured manpage.
309	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
310			- remove explicit context support so I don't have to maintain
311			it for threaded perls (i.e. it should work now :).
312	root	1.5
313	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
314	root	1.2	- return immediately from poll_wait if nreqs==0.
315			- get rid of the request pipe and use faster thread-thread
316	root	1.3	communications for most requests and responses.
317	root	1.2
318	root	1.1	0.1
319			- cloned from Linux::AIO, which is very similar.
320