[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

3.04 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:	1.159
Committed:	Tue Jun 17 23:38:10 2008 UTC (15 years, 11 months ago) by root
Branch:	MAIN
CVS Tags:	rel-3_04
Changes since 1.158:	+5 -0 lines
Log Message:	3.04
#	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	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
10			- (libeio) fix eio_mknod, which confused it's arguments.
11	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
12			is stupid.
13	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
14			- (libeio) fix a bug that could potentially cause IO::AIO
15			not to get initialised properly.
16	root	1.158
17	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
18	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
19	root	1.155	- (libeio) work around broken bsd headers once more.
20	root	1.154	- reduce shared library size again by not including wrappers.
21	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
22			- document the new IO::AIO::poll_cb result value.
23	root	1.153
24	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
25	root	1.150	- fix a memory leak on aio_readlink.
26			- bring back working fchmod.
27	root	1.151	- nop and busy now set result to 0.
28			- set errno to ENOMEM when allocation fails.
29	root	1.150
30	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
31			- (libeio) make it compile on systems without readahead or readdir_r.
32	root	1.148	- (libeio) improve configure check for readahead availability.
33			- do not try to link against -lrt.
34	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
35
36	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
37	root	1.145	- added bin/treescan to the distribution.
38			- switched to using libeio.
39			- LOTS OF INCOMPATIBLE CHANGES:
40			- remove signal functionality, it is not worth the effort.
41			- max_outstanding no longer returns the previous number of requests.
42			- poll_cb no longer returns number of requests.
43	root	1.143
44	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
45	root	1.141	- port to solaris perls configured for old posix
46			(analysed by Jost Krieger).
47	root	1.142	- keep a reference to the perl filehandle object in aio_close,
48			so it doesn't get closed prematurely, leading to ugly races.
49	root	1.141
50	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
51	root	1.137	- fix treescan output duplication and improve output ordering.
52			also display files given on the commandline.
53	root	1.140	- use a different algorithm for aio_close that is faster
54			and probably has even lower chances of blocking.
55	root	1.138	- do our own stack memory management for threads - linux
56			allocates outrageous amounts of VM (not so bad unless you
57			use mlockall...), which severely limits the number of threads
58	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
59			and 4096 * sizeof (long) (usually this is 16..64k).
60	root	1.137
61	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
62	root	1.134	- added aio_sync.
63	root	1.135	- added aio_pathsync.
64	root	1.136	- fix prototypes of (void) functions.
65	root	1.134
66	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
67			- perlio isn't generally threadsafe, so aio_close could not work reliably.
68			aio_close now tries a safe hack that might not be that asynchronous
69			(see the manpage for details).
70			- discard callback return values as to not grow the stack endlessly
71			when poll_cb handles many requests without returning.
72			- minor code cleanups.
73
74	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
75	root	1.131	- replaced _fd2fh with faster xs code.
76			- aio_close will now try to do "the right thing" and thus might
77			work sensibly for the very first time.
78
79	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
80	root	1.129	- after fork, invest some work to make sure that the poll_fileno
81			stays stable (by dup2'ing the new fd over the old one), to make
82			it easier for programs/libs that don't control their forking
83			behaviour and cannot recreate their watchers.
84
85	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
86	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
87			successfully demonstrated that you can block on futimes...).
88	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
89			internally (useful for sockets or O_APPEND handles).
90	root	1.126	- allow undef for length in aio_write.
91			- negative dataoffsets work as expected now in aio_read/aio_write.
92	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
93	root	1.125	have a larger range then.
94	root	1.120	- shared code between BDB and IO::AIO.
95	root	1.127	- aio_busy was completely broken. now fixed.
96			- readahead emulation now returns something.
97	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
98			(should never happen, though).
99	root	1.127	- large changes to make it partially compile and run on win32,
100			but win32 lacks too much functionality, and perl overrides way
101			too many functions with crashing versions.
102	root	1.120
103	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
104			- fix install path (Andreas J. Koenig).
105
106	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
107	root	1.114	- added aio_rmtree.
108	root	1.115	- wow, aio_mkdir was missing.
109	root	1.116	- aio_load did return undef on error, not -1.
110	root	1.117	- use prefixexp not prefix in autoconf.pm
111			(suggested by ... rt.cpan.org unreachable).
112	root	1.118	- avoid installing autoconf.pm.
113	root	1.114
114	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
115	root	1.112	- added aio_load.
116
117	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
118			- fix off-by-one bug in aio_read, causing memory corruption
119			or crashes.
120
121	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
122	root	1.108	- minor doc updates.
123	root	1.107	- minor cleanups.
124			- IO::AIO::poll returns request count.
125	root	1.109	- undocumented and unfinished async-signal-reporting.
126	root	1.107
127	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
128	root	1.100	- minor doc updates.
129	root	1.101	- added aio_readlink.
130			- properly zero-terminate aio_read buffer.
131			- fix aio_read/write with nonzero dataoffset.
132	root	1.104	- reduced size of aio request structure.
133	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
134	root	1.105	do not leak request in that case, either.
135	root	1.94
136	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
137	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
138			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
139	root	1.95	- fix a bug in aio_move where it would fail everytime
140			it would have to copy files manually.
141	root	1.98	- doc updates.
142	root	1.94	- start threads only on (very low) demand.
143	root	1.97	- end superfluous threads automatically after 10s idling.
144	root	1.98	- add IO::AIO::max_idle to control this.
145	root	1.94	- some tuning applied to random places.
146	root	1.95	- add aio_mknod.
147	root	1.59
148	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
149	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
150	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
151	root	1.68	- aio requests can be cancelled.
152	root	1.81	- callbacks can be (re-)set later.
153	root	1.93	- aio requests can choose between 9 priorities.
154	root	1.83	- add aio_group: aio requests can be grouped
155			into composite requests.
156			- generator interface for groups.
157	root	1.89	- add IO::AIO::poll_some.
158	root	1.72	- major documentation improvements.
159			- very minor bugfixes.
160	root	1.76	- add aio_nop for dummy requests.
161	root	1.84	- add aio_busy mainly for benchmarking and debugging.
162	root	1.79	- use "fast" mutexes on linux.
163	root	1.80	- use dynamic (and larger) buffers instead of
164			putting them onto the stack.
165			- optimise x86 and amd64 a bit.
166			- better error checking when ENOMEM.
167	root	1.85	- hopefully fix mem and dirp leaks on fork.
168	root	1.92	- warn about broken perl malloc.
169	root	1.88	- compiles on cygwin (but pread is broken on cygwin
170			which is not detected by autoconf, so you have to
171			edit autoconf/config.h yourself to enable emulation).
172	root	1.68
173	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
174	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
175
176	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
177			- codename "jost"
178			- AIX/Solaris(?) aren't being helpful again, hardcode a value
179			for NAME_MAX and drive with your eyes closed (reported by
180			wcooley@nakedape.cc).
181	root	1.63
182	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
183	root	1.61	- another minor bug in aio_scandir, again, the callback was called
184			twice when the directory can't be stat'ed.
185
186	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
187			- grr, another minor bug in aio_scandir, this time resulting
188			in a runtime error.
189
190	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
191	root	1.58	- aio_scandir errornously called callback twice in some cases.
192	root	1.57	- added AnyEvent example.
193
194	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
195	root	1.54	- no longer include $Config{libs}, as distros include too much
196	root	1.56	garbage in there that is not installed on typical systems
197	root	1.54	(for example, debian links perl against -lgdbm and many more
198			libraries despite perl not needing it, slowing down startup and
199			wasting memory).
200
201	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
202			- added aio_readdir, aio_scandir.
203	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
204			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
205			support is unavailable on my solaris 8 machine, but preliminary
206			code is there. What's lacking is configury stuff and testing...).
207	root	1.46
208	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
209	root	1.51	- create the aio threads on demand only (good after forking).
210	root	1.41	- somebody nagged about C89 compatibility, so this release should
211	root	1.42	be C89 compatible, but no guarantees for future ones.
212	root	1.43	- abort when the configure script fails.
213	root	1.41
214	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
215	root	1.93	- forgot to recreate the pipe after forking, this could cause
216	root	1.40	deadlocks.
217
218	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
219	root	1.33	- properly propagate exceptions from callbacks, instead of silently
220			eating them.
221	root	1.38	- use a different fork algorithm that avoids recursive callback
222			invocations and reduces fork latency in busy processes.
223	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
224			length after reading.
225			- fix a bug where the child would process some outstanding requests
226			from the parent.
227			- make a copy of the callback scalar, to avoid some very uncommon
228			(but valid) usages where the callback scalar changes.
229			- the callback was never freed in aio_read/aio_write.
230	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
231			scalar for better error reporting.
232	root	1.33
233	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
234			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
235	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
236			the external filename encoding first.
237	root	1.32	- fix the bug where filehandles could leak (again).
238	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
239			with your underdocumented, broken and outdated OS.
240			- fork'ing should now be officially supported (where linux and
241			posix contradict each other, I followed posix).
242	root	1.32	- only call read() once per poll, not twice (speedup).
243			- new functions: aio_rmdir, aio_symlink.
244	root	1.31	- force callback arguments to be undef or a reference, for better
245			error catching.
246	root	1.1
247	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
248	root	1.25	- added configure script to detect availability of some calls.
249	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
250	root	1.23	feedback yet).
251	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
252			and readahead via manual reading on platforms lacking those.
253	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
254			from Linux::AIO.
255	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
256			compile with it enabled. Probably breaks others. Oh well.
257	root	1.24	- try to be more careful with errno on non-threaded perls.
258	root	1.26	- cygwins perl insisted on a matching open mode when morphing
259			the fd to an fh.
260	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
261			do that for pathnames, too, in the future, so make sure you
262			properly encode your pathnames.
263	root	1.18
264	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
265			- aio_open did not reliably deliver (open) filehandles.
266	root	1.16	- all aio_*-functions keep a reference to the filehandle so
267			it doesn't go away while the aio requests is working on it.
268			- disable warnings in AIO.pm.
269
270	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
271			- allow recursive calls to poll_cb, use less locking calls, too.
272			- fix the Gtk2-example in the SYNOPSIS.
273	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
274			from Linux::AIO.
275			(found by compiling on cygwin. Unfortunately, cygwin declares but
276			does not implement pread/pwrite).
277			- only include <sys/syscall.h> on linux.
278
279	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
280	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
281			need it anyway.
282			- link against -lrt, as it might contain goodies such as fdatasync,
283			and often aio_read, which we do not use yet, but it shouldn't hurt.
284
285	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
286	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
287	root	1.10	- make callback argument optional for all calls.
288	root	1.8
289	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
290	root	1.5	- restructured manpage.
291	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
292			- remove explicit context support so I don't have to maintain
293			it for threaded perls (i.e. it should work now :).
294	root	1.5
295	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
296	root	1.2	- return immediately from poll_wait if nreqs==0.
297			- get rid of the request pipe and use faster thread-thread
298	root	1.3	communications for most requests and responses.
299	root	1.2
300	root	1.1	0.1
301			- cloned from Linux::AIO, which is very similar.
302