[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

        - (libeio) correctly call pthread_attr_destroy ().
        - reduce shared library size again by not including wrappers.

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