[ViewVC] Annotation of: cvs/IO-AIO/Changes

Revision history for IO::AIO

TODO: better autoconf.pm that can return LIBS etc.
TODO: aio_cptree/mvtree
TODO: reduce condvar fairness: schedule hot-cache-threads first?
TODO: splice/tee/vmsplice/sync_file_range? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
TODO: aio_fcntl, at least for file-locking

3.06 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:	1.164
Committed:	Tue Jul 15 10:42:26 2008 UTC (15 years, 10 months ago) by root
Branch:	MAIN
CVS Tags:	rel-3_06
Changes since 1.163:	+3 -2 lines
Log Message:	3.06
#	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	1.164	3.06 Tue Jul 15 12:41:32 CEST 2008
10	root	1.162	- move preadwritelock definition before it's first reference,
11	root	1.164	to make it compile again on broken platforms (they still exist)
12			or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
13	root	1.162
14	root	1.161	3.05 Thu Jun 19 23:23:52 CEST 2008
15	root	1.160	- work around perl overriding readdir etc. with thread-unsafe
16	root	1.161	(sic!) versions.
17	root	1.160
18	root	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
19			- (libeio) fix eio_mknod, which confused it's arguments.
20	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
21			is stupid.
22	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
23			- (libeio) fix a bug that could potentially cause IO::AIO
24			not to get initialised properly.
25	root	1.158
26	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
27	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
28	root	1.155	- (libeio) work around broken bsd headers once more.
29	root	1.154	- reduce shared library size again by not including wrappers.
30	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
31			- document the new IO::AIO::poll_cb result value.
32	root	1.153
33	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
34	root	1.150	- fix a memory leak on aio_readlink.
35			- bring back working fchmod.
36	root	1.151	- nop and busy now set result to 0.
37			- set errno to ENOMEM when allocation fails.
38	root	1.150
39	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
40			- (libeio) make it compile on systems without readahead or readdir_r.
41	root	1.148	- (libeio) improve configure check for readahead availability.
42			- do not try to link against -lrt.
43	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
44
45	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
46	root	1.145	- added bin/treescan to the distribution.
47			- switched to using libeio.
48			- LOTS OF INCOMPATIBLE CHANGES:
49			- remove signal functionality, it is not worth the effort.
50			- max_outstanding no longer returns the previous number of requests.
51			- poll_cb no longer returns number of requests.
52	root	1.143
53	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
54	root	1.141	- port to solaris perls configured for old posix
55			(analysed by Jost Krieger).
56	root	1.142	- keep a reference to the perl filehandle object in aio_close,
57			so it doesn't get closed prematurely, leading to ugly races.
58	root	1.141
59	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
60	root	1.137	- fix treescan output duplication and improve output ordering.
61			also display files given on the commandline.
62	root	1.140	- use a different algorithm for aio_close that is faster
63			and probably has even lower chances of blocking.
64	root	1.138	- do our own stack memory management for threads - linux
65			allocates outrageous amounts of VM (not so bad unless you
66			use mlockall...), which severely limits the number of threads
67	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
68			and 4096 * sizeof (long) (usually this is 16..64k).
69	root	1.137
70	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
71	root	1.134	- added aio_sync.
72	root	1.135	- added aio_pathsync.
73	root	1.136	- fix prototypes of (void) functions.
74	root	1.134
75	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
76			- perlio isn't generally threadsafe, so aio_close could not work reliably.
77			aio_close now tries a safe hack that might not be that asynchronous
78			(see the manpage for details).
79			- discard callback return values as to not grow the stack endlessly
80			when poll_cb handles many requests without returning.
81			- minor code cleanups.
82
83	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
84	root	1.131	- replaced _fd2fh with faster xs code.
85			- aio_close will now try to do "the right thing" and thus might
86			work sensibly for the very first time.
87
88	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
89	root	1.129	- after fork, invest some work to make sure that the poll_fileno
90			stays stable (by dup2'ing the new fd over the old one), to make
91			it easier for programs/libs that don't control their forking
92			behaviour and cannot recreate their watchers.
93
94	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
95	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
96			successfully demonstrated that you can block on futimes...).
97	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
98			internally (useful for sockets or O_APPEND handles).
99	root	1.126	- allow undef for length in aio_write.
100			- negative dataoffsets work as expected now in aio_read/aio_write.
101	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
102	root	1.125	have a larger range then.
103	root	1.120	- shared code between BDB and IO::AIO.
104	root	1.127	- aio_busy was completely broken. now fixed.
105			- readahead emulation now returns something.
106	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
107			(should never happen, though).
108	root	1.127	- large changes to make it partially compile and run on win32,
109			but win32 lacks too much functionality, and perl overrides way
110			too many functions with crashing versions.
111	root	1.120
112	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
113			- fix install path (Andreas J. Koenig).
114
115	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
116	root	1.114	- added aio_rmtree.
117	root	1.115	- wow, aio_mkdir was missing.
118	root	1.116	- aio_load did return undef on error, not -1.
119	root	1.117	- use prefixexp not prefix in autoconf.pm
120			(suggested by ... rt.cpan.org unreachable).
121	root	1.118	- avoid installing autoconf.pm.
122	root	1.114
123	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
124	root	1.112	- added aio_load.
125
126	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
127			- fix off-by-one bug in aio_read, causing memory corruption
128			or crashes.
129
130	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
131	root	1.108	- minor doc updates.
132	root	1.107	- minor cleanups.
133			- IO::AIO::poll returns request count.
134	root	1.109	- undocumented and unfinished async-signal-reporting.
135	root	1.107
136	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
137	root	1.100	- minor doc updates.
138	root	1.101	- added aio_readlink.
139			- properly zero-terminate aio_read buffer.
140			- fix aio_read/write with nonzero dataoffset.
141	root	1.104	- reduced size of aio request structure.
142	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
143	root	1.105	do not leak request in that case, either.
144	root	1.94
145	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
146	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
147			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
148	root	1.95	- fix a bug in aio_move where it would fail everytime
149			it would have to copy files manually.
150	root	1.98	- doc updates.
151	root	1.94	- start threads only on (very low) demand.
152	root	1.97	- end superfluous threads automatically after 10s idling.
153	root	1.98	- add IO::AIO::max_idle to control this.
154	root	1.94	- some tuning applied to random places.
155	root	1.95	- add aio_mknod.
156	root	1.59
157	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
158	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
159	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
160	root	1.68	- aio requests can be cancelled.
161	root	1.81	- callbacks can be (re-)set later.
162	root	1.93	- aio requests can choose between 9 priorities.
163	root	1.83	- add aio_group: aio requests can be grouped
164			into composite requests.
165			- generator interface for groups.
166	root	1.89	- add IO::AIO::poll_some.
167	root	1.72	- major documentation improvements.
168			- very minor bugfixes.
169	root	1.76	- add aio_nop for dummy requests.
170	root	1.84	- add aio_busy mainly for benchmarking and debugging.
171	root	1.79	- use "fast" mutexes on linux.
172	root	1.80	- use dynamic (and larger) buffers instead of
173			putting them onto the stack.
174			- optimise x86 and amd64 a bit.
175			- better error checking when ENOMEM.
176	root	1.85	- hopefully fix mem and dirp leaks on fork.
177	root	1.92	- warn about broken perl malloc.
178	root	1.88	- compiles on cygwin (but pread is broken on cygwin
179			which is not detected by autoconf, so you have to
180			edit autoconf/config.h yourself to enable emulation).
181	root	1.68
182	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
183	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
184
185	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
186			- codename "jost"
187			- AIX/Solaris(?) aren't being helpful again, hardcode a value
188			for NAME_MAX and drive with your eyes closed (reported by
189			wcooley@nakedape.cc).
190	root	1.63
191	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
192	root	1.61	- another minor bug in aio_scandir, again, the callback was called
193			twice when the directory can't be stat'ed.
194
195	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
196			- grr, another minor bug in aio_scandir, this time resulting
197			in a runtime error.
198
199	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
200	root	1.58	- aio_scandir errornously called callback twice in some cases.
201	root	1.57	- added AnyEvent example.
202
203	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
204	root	1.54	- no longer include $Config{libs}, as distros include too much
205	root	1.56	garbage in there that is not installed on typical systems
206	root	1.54	(for example, debian links perl against -lgdbm and many more
207			libraries despite perl not needing it, slowing down startup and
208			wasting memory).
209
210	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
211			- added aio_readdir, aio_scandir.
212	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
213			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
214			support is unavailable on my solaris 8 machine, but preliminary
215			code is there. What's lacking is configury stuff and testing...).
216	root	1.46
217	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
218	root	1.51	- create the aio threads on demand only (good after forking).
219	root	1.41	- somebody nagged about C89 compatibility, so this release should
220	root	1.42	be C89 compatible, but no guarantees for future ones.
221	root	1.43	- abort when the configure script fails.
222	root	1.41
223	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
224	root	1.93	- forgot to recreate the pipe after forking, this could cause
225	root	1.40	deadlocks.
226
227	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
228	root	1.33	- properly propagate exceptions from callbacks, instead of silently
229			eating them.
230	root	1.38	- use a different fork algorithm that avoids recursive callback
231			invocations and reduces fork latency in busy processes.
232	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
233			length after reading.
234			- fix a bug where the child would process some outstanding requests
235			from the parent.
236			- make a copy of the callback scalar, to avoid some very uncommon
237			(but valid) usages where the callback scalar changes.
238			- the callback was never freed in aio_read/aio_write.
239	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
240			scalar for better error reporting.
241	root	1.33
242	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
243			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
244	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
245			the external filename encoding first.
246	root	1.32	- fix the bug where filehandles could leak (again).
247	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
248			with your underdocumented, broken and outdated OS.
249			- fork'ing should now be officially supported (where linux and
250			posix contradict each other, I followed posix).
251	root	1.32	- only call read() once per poll, not twice (speedup).
252			- new functions: aio_rmdir, aio_symlink.
253	root	1.31	- force callback arguments to be undef or a reference, for better
254			error catching.
255	root	1.1
256	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
257	root	1.25	- added configure script to detect availability of some calls.
258	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
259	root	1.23	feedback yet).
260	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
261			and readahead via manual reading on platforms lacking those.
262	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
263			from Linux::AIO.
264	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
265			compile with it enabled. Probably breaks others. Oh well.
266	root	1.24	- try to be more careful with errno on non-threaded perls.
267	root	1.26	- cygwins perl insisted on a matching open mode when morphing
268			the fd to an fh.
269	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
270			do that for pathnames, too, in the future, so make sure you
271			properly encode your pathnames.
272	root	1.18
273	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
274			- aio_open did not reliably deliver (open) filehandles.
275	root	1.16	- all aio_*-functions keep a reference to the filehandle so
276			it doesn't go away while the aio requests is working on it.
277			- disable warnings in AIO.pm.
278
279	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
280			- allow recursive calls to poll_cb, use less locking calls, too.
281			- fix the Gtk2-example in the SYNOPSIS.
282	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
283			from Linux::AIO.
284			(found by compiling on cygwin. Unfortunately, cygwin declares but
285			does not implement pread/pwrite).
286			- only include <sys/syscall.h> on linux.
287
288	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
289	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
290			need it anyway.
291			- link against -lrt, as it might contain goodies such as fdatasync,
292			and often aio_read, which we do not use yet, but it shouldn't hurt.
293
294	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
295	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
296	root	1.10	- make callback argument optional for all calls.
297	root	1.8
298	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
299	root	1.5	- restructured manpage.
300	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
301			- remove explicit context support so I don't have to maintain
302			it for threaded perls (i.e. it should work now :).
303	root	1.5
304	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
305	root	1.2	- return immediately from poll_wait if nreqs==0.
306			- get rid of the request pipe and use faster thread-thread
307	root	1.3	communications for most requests and responses.
308	root	1.2
309	root	1.1	0.1
310			- cloned from Linux::AIO, which is very similar.
311