[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: fix setsig
TODO: splice/tee/vmsplice/sync_file_range? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)

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:	1.132
Committed:	Thu Oct 4 12:50:35 2007 UTC (16 years, 8 months ago) by root
Branch:	MAIN
CVS Tags:	rel-2_5
Changes since 1.131:	+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	1.109	TODO: fix setsig
7	root	1.123	TODO: splice/tee/vmsplice/sync_file_range? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
8	root	1.100
9	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
10	root	1.131	- replaced _fd2fh with faster xs code.
11			- aio_close will now try to do "the right thing" and thus might
12			work sensibly for the very first time.
13
14	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
15	root	1.129	- after fork, invest some work to make sure that the poll_fileno
16			stays stable (by dup2'ing the new fd over the old one), to make
17			it easier for programs/libs that don't control their forking
18			behaviour and cannot recreate their watchers.
19
20	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
21	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
22			successfully demonstrated that you can block on futimes...).
23	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
24			internally (useful for sockets or O_APPEND handles).
25	root	1.126	- allow undef for length in aio_write.
26			- negative dataoffsets work as expected now in aio_read/aio_write.
27	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
28	root	1.125	have a larger range then.
29	root	1.120	- shared code between BDB and IO::AIO.
30	root	1.127	- aio_busy was completely broken. now fixed.
31			- readahead emulation now returns something.
32	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
33			(should never happen, though).
34	root	1.127	- large changes to make it partially compile and run on win32,
35			but win32 lacks too much functionality, and perl overrides way
36			too many functions with crashing versions.
37	root	1.120
38	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
39			- fix install path (Andreas J. Koenig).
40
41	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
42	root	1.114	- added aio_rmtree.
43	root	1.115	- wow, aio_mkdir was missing.
44	root	1.116	- aio_load did return undef on error, not -1.
45	root	1.117	- use prefixexp not prefix in autoconf.pm
46			(suggested by ... rt.cpan.org unreachable).
47	root	1.118	- avoid installing autoconf.pm.
48	root	1.114
49	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
50	root	1.112	- added aio_load.
51
52	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
53			- fix off-by-one bug in aio_read, causing memory corruption
54			or crashes.
55
56	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
57	root	1.108	- minor doc updates.
58	root	1.107	- minor cleanups.
59			- IO::AIO::poll returns request count.
60	root	1.109	- undocumented and unfinished async-signal-reporting.
61	root	1.107
62	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
63	root	1.100	- minor doc updates.
64	root	1.101	- added aio_readlink.
65			- properly zero-terminate aio_read buffer.
66			- fix aio_read/write with nonzero dataoffset.
67	root	1.104	- reduced size of aio request structure.
68	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
69	root	1.105	do not leak request in that case, either.
70	root	1.94
71	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
72	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
73			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
74	root	1.95	- fix a bug in aio_move where it would fail everytime
75			it would have to copy files manually.
76	root	1.98	- doc updates.
77	root	1.94	- start threads only on (very low) demand.
78	root	1.97	- end superfluous threads automatically after 10s idling.
79	root	1.98	- add IO::AIO::max_idle to control this.
80	root	1.94	- some tuning applied to random places.
81	root	1.95	- add aio_mknod.
82	root	1.59
83	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
84	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
85	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
86	root	1.68	- aio requests can be cancelled.
87	root	1.81	- callbacks can be (re-)set later.
88	root	1.93	- aio requests can choose between 9 priorities.
89	root	1.83	- add aio_group: aio requests can be grouped
90			into composite requests.
91			- generator interface for groups.
92	root	1.89	- add IO::AIO::poll_some.
93	root	1.72	- major documentation improvements.
94			- very minor bugfixes.
95	root	1.76	- add aio_nop for dummy requests.
96	root	1.84	- add aio_busy mainly for benchmarking and debugging.
97	root	1.79	- use "fast" mutexes on linux.
98	root	1.80	- use dynamic (and larger) buffers instead of
99			putting them onto the stack.
100			- optimise x86 and amd64 a bit.
101			- better error checking when ENOMEM.
102	root	1.85	- hopefully fix mem and dirp leaks on fork.
103	root	1.92	- warn about broken perl malloc.
104	root	1.88	- compiles on cygwin (but pread is broken on cygwin
105			which is not detected by autoconf, so you have to
106			edit autoconf/config.h yourself to enable emulation).
107	root	1.68
108	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
109	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
110
111	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
112			- codename "jost"
113			- AIX/Solaris(?) aren't being helpful again, hardcode a value
114			for NAME_MAX and drive with your eyes closed (reported by
115			wcooley@nakedape.cc).
116	root	1.63
117	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
118	root	1.61	- another minor bug in aio_scandir, again, the callback was called
119			twice when the directory can't be stat'ed.
120
121	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
122			- grr, another minor bug in aio_scandir, this time resulting
123			in a runtime error.
124
125	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
126	root	1.58	- aio_scandir errornously called callback twice in some cases.
127	root	1.57	- added AnyEvent example.
128
129	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
130	root	1.54	- no longer include $Config{libs}, as distros include too much
131	root	1.56	garbage in there that is not installed on typical systems
132	root	1.54	(for example, debian links perl against -lgdbm and many more
133			libraries despite perl not needing it, slowing down startup and
134			wasting memory).
135
136	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
137			- added aio_readdir, aio_scandir.
138	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
139			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
140			support is unavailable on my solaris 8 machine, but preliminary
141			code is there. What's lacking is configury stuff and testing...).
142	root	1.46
143	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
144	root	1.51	- create the aio threads on demand only (good after forking).
145	root	1.41	- somebody nagged about C89 compatibility, so this release should
146	root	1.42	be C89 compatible, but no guarantees for future ones.
147	root	1.43	- abort when the configure script fails.
148	root	1.41
149	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
150	root	1.93	- forgot to recreate the pipe after forking, this could cause
151	root	1.40	deadlocks.
152
153	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
154	root	1.33	- properly propagate exceptions from callbacks, instead of silently
155			eating them.
156	root	1.38	- use a different fork algorithm that avoids recursive callback
157			invocations and reduces fork latency in busy processes.
158	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
159			length after reading.
160			- fix a bug where the child would process some outstanding requests
161			from the parent.
162			- make a copy of the callback scalar, to avoid some very uncommon
163			(but valid) usages where the callback scalar changes.
164			- the callback was never freed in aio_read/aio_write.
165	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
166			scalar for better error reporting.
167	root	1.33
168	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
169			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
170	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
171			the external filename encoding first.
172	root	1.32	- fix the bug where filehandles could leak (again).
173	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
174			with your underdocumented, broken and outdated OS.
175			- fork'ing should now be officially supported (where linux and
176			posix contradict each other, I followed posix).
177	root	1.32	- only call read() once per poll, not twice (speedup).
178			- new functions: aio_rmdir, aio_symlink.
179	root	1.31	- force callback arguments to be undef or a reference, for better
180			error catching.
181	root	1.1
182	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
183	root	1.25	- added configure script to detect availability of some calls.
184	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
185	root	1.23	feedback yet).
186	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
187			and readahead via manual reading on platforms lacking those.
188	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
189			from Linux::AIO.
190	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
191			compile with it enabled. Probably breaks others. Oh well.
192	root	1.24	- try to be more careful with errno on non-threaded perls.
193	root	1.26	- cygwins perl insisted on a matching open mode when morphing
194			the fd to an fh.
195	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
196			do that for pathnames, too, in the future, so make sure you
197			properly encode your pathnames.
198	root	1.18
199	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
200			- aio_open did not reliably deliver (open) filehandles.
201	root	1.16	- all aio_*-functions keep a reference to the filehandle so
202			it doesn't go away while the aio requests is working on it.
203			- disable warnings in AIO.pm.
204
205	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
206			- allow recursive calls to poll_cb, use less locking calls, too.
207			- fix the Gtk2-example in the SYNOPSIS.
208	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
209			from Linux::AIO.
210			(found by compiling on cygwin. Unfortunately, cygwin declares but
211			does not implement pread/pwrite).
212			- only include <sys/syscall.h> on linux.
213
214	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
215	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
216			need it anyway.
217			- link against -lrt, as it might contain goodies such as fdatasync,
218			and often aio_read, which we do not use yet, but it shouldn't hurt.
219
220	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
221	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
222	root	1.10	- make callback argument optional for all calls.
223	root	1.8
224	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
225	root	1.5	- restructured manpage.
226	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
227			- remove explicit context support so I don't have to maintain
228			it for threaded perls (i.e. it should work now :).
229	root	1.5
230	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
231	root	1.2	- return immediately from poll_wait if nreqs==0.
232			- get rid of the request pipe and use faster thread-thread
233	root	1.3	communications for most requests and responses.
234	root	1.2
235	root	1.1	0.1
236			- cloned from Linux::AIO, which is very similar.
237