[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? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
TODO: aio_fcntl, at least for file-locking

        - speed up readdirx sort algorithm slightly.

3.21 Fri Jun 12 18:45:53 CEST 2009
        - new options --dirs and --files for treescan.
        - install bin/treescan by default.
        - (libeio) aio_readdir can now be cancelled while executing.
        - fix a printf format string for 64 bit systems (could lead
          to problems on big endian 64 bit systems).
        - do not use qsort() but our own algorithm: glibc initialises
          the whole locale and I/O subsystem inside qsort, causing
          a stack overflow on 32 bit machines. The new sort uses much less
          stack and is more than twice as fast in typical situations.

3.2  Sun Jun  7 20:30:05 CEST 2009
        - (libeio) pwrite emulation was even more flawed than intended and did
          not restore the file offset.
        - add aio_readdirx, which can return inode and filetype and sort
          the names in various ways.
        - unfortunately, utime, chmod, chown on an open file that has just
          been written can easily block, which caused aio_copy to block the
          process. no more!
        - no longer rely on dst path in aio_copy when futime is available.

3.19 Tue Apr 21 22:05:21 CEST 2009
        - more perl 5.10 workarounds for aio_read and write.
        - aio_write no longer modifies the sv (if possible).
        - aio_read now works correctly with magic values.

3.18 Sun Apr 19 21:17:32 CEST 2009
        - better diagnostics when some aio_* functions get passed an illegal fh.
        - try to avoid crashes due to incompatible 5.10 API changes. grmbl.

3.17 Thu Nov 20 08:45:36 CET 2008
        - (libeio) added aio_sync_file_range (untested).
        - add aio_busy to @IO::AIO::AIO_REQ.

3.16 Wed Oct 22 18:28:01 CEST 2008
        - use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
          part to improve portability to perl 5.8 (reported by szymon).

3.15 Mon Oct 13 00:39:55 CEST 2008
        - automatic removal of feeders was broken.
        - (libeio) use a more robust method to detect whether a feeder
          has added something to the group or not.

3.1  Thu Oct  2 13:34:40 CEST 2008
        - pre-deref the passed callback object, for increased speed
          and decreased memory usage.
        - call on_next_submit callback even for aio_group - impact unknown,
          but seems more correct.
        - $req->cb now returns the original callback.
        - (libeio) pass EIO_GROUP/aio_group requests through the queue without
          requiring a thread switch.
        - (libeio) status code of aio_futime and aio_utime was always passed 0.
        - do some other µ-optimisations.

3.07 Sat Aug  2 16:06:13 CEST 2008
        - do not include LIBS in autoconf tests.

3.06 Tue Jul 15 12:41:32 CEST 2008
        - move preadwritelock definition before it's first reference,
          to make it compile again on broken platforms (they still exist)
          or badly cofngiured perls (redhat...), reported by Rob Bloodgood.

3.05 Thu Jun 19 23:23:52 CEST 2008
        - work around perl overriding readdir etc. with thread-unsafe
          (sic!) versions.

3.04 Wed Jun 18 01:35:38 CEST 2008
        - (libeio) fix eio_mknod, which confused it's arguments.
        - (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
          is stupid.
        - (libeio) fix eio__readahead prototype, patch by Jost Krieger.
        - (libeio) fix a bug that could potentially cause IO::AIO
          not to get initialised properly.

3.03 Thu May 29 05:33:30 CEST 2008
        - (libeio) correctly call pthread_attr_destroy ().
        - (libeio) work around broken bsd headers once more.
        - reduce shared library size again by not including wrappers.
        - max_outstanding could cause poll to enter a busy-waiting loop.
        - document the new IO::AIO::poll_cb result value.

3.02 Mon May 12 02:32:02 CEST 2008
        - fix a memory leak on aio_readlink.
        - bring back working fchmod.
        - nop and busy now set result to 0.
        - set errno to ENOMEM when allocation fails.

3.01 Sun May 11 03:07:03 CEST 2008
        - (libeio) make it compile on systems without readahead or readdir_r.
        - (libeio) improve configure check for readahead availability.
        - do not try to link against -lrt.
        - use a separate configure script for IO::AIO (not the libeio one).

3.0  Sun May 11 00:57:14 CEST 2008
        - added bin/treescan to the distribution.
        - switched to using libeio.
        - LOTS OF INCOMPATIBLE CHANGES:
          - remove signal functionality, it is not worth the effort.
          - max_outstanding no longer returns the previous number of requests.
          - poll_cb no longer returns number of requests.

2.62 Sat Apr 26 13:59:33 CEST 2008
        - port to solaris perls configured for old posix
          (analysed by Jost Krieger).
        - keep a reference to the perl filehandle object in aio_close,
          so it doesn't get closed prematurely, leading to ugly races.

2.61 Wed Apr 16 18:45:02 CEST 2008
        - fix treescan output duplication and improve output ordering.
          also display files given on the commandline.
        - use a different algorithm for aio_close that is faster
          and probably has even lower chances of blocking.
        - do our own stack memory management for threads - linux
          allocates outrageous amounts of VM (not so bad unless you
          use mlockall...), which severely limits the number of threads
          on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
          and 4096 * sizeof (long) (usually this is 16..64k).

2.6  Sun Mar 30 08:28:11 CEST 2008
        - added aio_sync.
        - added aio_pathsync.
        - fix prototypes of (void) functions.

2.51 Sat Oct  6 16:04:54 CEST 2007
        - perlio isn't generally threadsafe, so aio_close could not work reliably.
          aio_close now tries a safe hack that might not be that asynchronous
          (see the manpage for details).
        - discard callback return values as to not grow the stack endlessly
          when poll_cb handles many requests without returning.
        - minor code cleanups.

2.5  Thu Oct  4 14:49:08 CEST 2007
        - replaced _fd2fh with faster xs code.
        - aio_close will now try to do "the right thing" and thus might
          work sensibly for the very first time.

2.41 Mon Sep 24 21:28:21 CEST 2007
        - after fork, invest some work to make sure that the poll_fileno
          stays stable (by dup2'ing the new fd over the old one), to make
          it easier for programs/libs that don't control their forking
          behaviour and cannot recreate their watchers.

2.4  Sun Aug  5 18:44:22 CEST 2007
        - add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
          successfully demonstrated that you can block on futimes...).
        - allow undef as fileoffset for aio_read/write and use read/write(2)
          internally (useful for sockets or O_APPEND handles).
        - allow undef for length in aio_write.
        - negative dataoffsets work as expected now in aio_read/aio_write.
        - use NV instead of UV for 32 bit perls and file offsets, as NVs
          have a larger range then.
        - shared code between BDB and IO::AIO.
        - aio_busy was completely broken. now fixed.
        - readahead emulation now returns something.
        - correctly set errno to ENOSYS on unimplemented functions
          (should never happen, though).
        - large changes to make it partially compile and run on win32,
          but win32 lacks too much functionality, and perl overrides way
          too many functions with crashing versions.

2.33 Tue Jan 23 23:55:41 CET 2007
        - fix install path (Andreas J. Koenig).

2.32 Mon Jan 22 16:56:23 CET 2007
        - added aio_rmtree.
        - wow, aio_mkdir was missing.
        - aio_load did return undef on error, not -1.
        - use prefixexp not prefix in autoconf.pm
          (suggested by ... rt.cpan.org unreachable).
        - avoid installing autoconf.pm.

2.31 Sat Jan  6 03:46:02 CET 2007
        - added aio_load.

2.3  Sat Dec 23 05:48:07 CET 2006
        - fix off-by-one bug in aio_read, causing memory corruption
          or crashes.

2.21  Fri Dec 22 05:03:38 CET 2006
        - minor doc updates.
        - minor cleanups.
        - IO::AIO::poll returns request count.
        - undocumented and unfinished async-signal-reporting.

2.2  Tue Oct 31 00:31:00 CET 2006
        - minor doc updates.
        - added aio_readlink.
        - properly zero-terminate aio_read buffer.
        - fix aio_read/write with nonzero dataoffset.
        - reduced size of aio request structure.
        - better diagnostics when pathnames etc. are not byte-encoded;
          do not leak request in that case, either.

2.1  Sun Oct 29 02:01:57 CET 2006
        - INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
          IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
        - fix a bug in aio_move where it would fail everytime
          it would have to copy files manually.
        - doc updates.
        - start threads only on (very low) demand.
        - end superfluous threads automatically after 10s idling.
        - add IO::AIO::max_idle to control this.
        - some tuning applied to random places.
        - add aio_mknod.

2.0  Thu Oct 26 18:27:58 CEST 2006
        - minor incompatibility: max_outstanding semantics have changed.
        - major rewrite, consider all functionality EXPERIMENTAL.
        - aio requests can be cancelled.
        - callbacks can be (re-)set later.
        - aio requests can choose between 9 priorities.
        - add aio_group: aio requests can be grouped
          into composite requests.
        - generator interface for groups.
        - add IO::AIO::poll_some.
        - major documentation improvements.
        - very minor bugfixes.
        - add aio_nop for dummy requests.
        - add aio_busy mainly for benchmarking and debugging.
        - use "fast" mutexes on linux.
        - use dynamic (and larger) buffers instead of
          putting them onto the stack.
        - optimise x86 and amd64 a bit.
        - better error checking when ENOMEM.
        - hopefully fix mem and dirp leaks on fork.
        - warn about broken perl malloc.
        - compiles on cygwin (but pread is broken on cygwin
          which is not detected by autoconf, so you have to
          edit autoconf/config.h yourself to enable emulation).

1.8  Sat Jun 24 22:20:44 CEST 2006
        - add and/or document aio_rename, aio_link, aio_symlink and aio_move.

1.73 Wed Mar  1 22:49:32 CET 2006
        - codename "jost"
        - AIX/Solaris(?) aren't being helpful again, hardcode a value
          for NAME_MAX and drive with your eyes closed (reported by
          wcooley@nakedape.cc).

1.72 Thu Feb  2 00:40:44 CET 2006
        - another minor bug in aio_scandir, again, the callback was called
          twice when the directory can't be stat'ed.

1.71 Mon Dec 26 20:20:03 CET 2005
        - grr, another minor bug in aio_scandir, this time resulting
          in a runtime error.

1.7  Mon Dec 26 19:29:48 CET 2005
        - aio_scandir errornously called callback twice in some cases.
        - added AnyEvent example.

1.61 Wed Sep  7 19:40:42 CEST 2005
        - no longer include $Config{libs}, as distros include too much
          garbage in there that is not installed on typical systems
          (for example, debian links perl against -lgdbm and many more
          libraries despite perl not needing it, slowing down startup and
          wasting memory).

1.6  Tue Aug 30 17:44:44 CEST 2005
        - added aio_readdir, aio_scandir.
        - added aio_sendfile, including sendfile emulation when sendfile
          isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
          support is unavailable on my solaris 8 machine, but preliminary
          code is there. What's lacking is configury stuff and testing...).

1.5  Sat Aug 20 02:32:19 CEST 2005
        - create the aio threads on demand only (good after forking).
        - somebody nagged about C89 compatibility, so this release should
          be C89 compatible, but no guarantees for future ones.
        - abort when the configure script fails.

1.4  Wed Aug 17 08:07:27 CEST 2005
        - forgot to recreate the pipe after forking, this could cause
          deadlocks.

1.3  Wed Aug 17 07:25:54 CEST 2005
        - properly propagate exceptions from callbacks, instead of silently
          eating them.
        - use a different fork algorithm that avoids recursive callback
          invocations and reduces fork latency in busy processes.
        - fix a bug where the buffer scalar in aio_read got assigned the wrong
          length after reading.
        - fix a bug where the child would process some outstanding requests
          from the parent.
        - make a copy of the callback scalar, to avoid some very uncommon
          (but valid) usages where the callback scalar changes.
        - the callback was never freed in aio_read/aio_write.
        - aio_read/aio_write will now set the readonly flag on the data
          scalar for better error reporting.

1.2  Wed Aug 17 01:22:58 CEST 2005
        - verified on cygwin, linux/amd64+ia32+alpha, solaris.
        - use SvPVbyte for filenames now. You *need* to encode your strings to
          the external filename encoding first.
        - fix the bug where filehandles could leak (again).
        - clarify freebsd situation: make it work and tell me how, or go away
          with your underdocumented, broken and outdated OS.
        - fork'ing should now be officially supported (where linux and
          posix contradict each other, I followed posix).
        - only call read() once per poll, not twice (speedup).
        - new functions: aio_rmdir, aio_symlink.
        - force callback arguments to be undef or a reference, for better
          error catching.

1.1  Sun Aug  7 05:27:23 CEST 2005
        - added configure script to detect availability of some calls.
          (imperfect, as we cannot detect things like -lrt due to missing
          feedback yet).
        - emulate fdatasync via fsync, pread/pwrite via unsafe read/write
          and readahead via manual reading on platforms lacking those.
        - ported t/03_errors.t+framework by Brad Fitzpatrick
          from Linux::AIO.
        - removed XOPEN_SOURCE because stupid solaris 9 doesn't
          compile with it enabled. Probably breaks others. Oh well.
        - try to be more careful with errno on non-threaded perls.
        - cygwins perl insisted on a matching open mode when morphing
          the fd to an fh.
        - convert sv's to "byte" encoding in aio_read/aio_write. Might
          do that for pathnames, too, in the future, so make sure you
          properly encode your pathnames.

1.0  Fri Jul 22 10:43:30 CEST 2005
        - aio_open did not reliably deliver (open) filehandles.
        - all aio_*-functions keep a reference to the filehandle so
          it doesn't go away while the aio requests is working on it.
        - disable warnings in AIO.pm.

0.9  Wed Jul 20 23:55:04 CEST 2005
        - allow recursive calls to poll_cb, use less locking calls, too.
        - fix the Gtk2-example in the SYNOPSIS.
        - use pread/pwrite not pread64/pwrite64. this was simply a leftover
          from Linux::AIO.
          (found by compiling on cygwin. Unfortunately, cygwin declares but
          does not implement pread/pwrite).
        - only include <sys/syscall.h> on linux.

0.5  Tue Jul 12 13:03:09 CEST 2005
        - removed #include <endian.h>, it's not portable, and we don't
          need it anyway.
        - link against -lrt, as it might contain goodies such as fdatasync,
          and often aio_read, which we do not use yet, but it shouldn't hurt.

0.4  Mon Jul 11 05:28:25 CEST 2005
        - added IO::AIO::flush, IO::AIO::poll.
        - make callback argument optional for all calls.

0.3  Mon Jul 11 01:42:37 CEST 2005
        - restructured manpage.
        - added SYNOPSIS with examples for Event, Glib, Tk.
        - remove explicit context support so I don't have to maintain
          it for threaded perls (i.e. it should work now :).

0.2  Sun Jul 10 22:57:12 CEST 2005
        - return immediately from poll_wait if nreqs==0.
        - get rid of the request pipe and use faster thread-thread
          communications for most requests and responses.

0.1
        - cloned from Linux::AIO, which is very similar.

Revision:	1.191
Committed:	Sat Jun 13 03:59:04 2009 UTC (14 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.190:	+2 -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	1.176	TODO: splice/tee/vmsplice? (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	1.191	- speed up readdirx sort algorithm slightly.
10
11	root	1.190	3.21 Fri Jun 12 18:45:53 CEST 2009
12	root	1.187	- new options --dirs and --files for treescan.
13	root	1.188	- install bin/treescan by default.
14	root	1.189	- (libeio) aio_readdir can now be cancelled while executing.
15	root	1.190	- fix a printf format string for 64 bit systems (could lead
16			to problems on big endian 64 bit systems).
17			- do not use qsort() but our own algorithm: glibc initialises
18			the whole locale and I/O subsystem inside qsort, causing
19			a stack overflow on 32 bit machines. The new sort uses much less
20			stack and is more than twice as fast in typical situations.
21	root	1.187
22	root	1.186	3.2 Sun Jun 7 20:30:05 CEST 2009
23	root	1.182	- (libeio) pwrite emulation was even more flawed than intended and did
24			not restore the file offset.
25	root	1.183	- add aio_readdirx, which can return inode and filetype and sort
26			the names in various ways.
27	root	1.182	- unfortunately, utime, chmod, chown on an open file that has just
28			been written can easily block, which caused aio_copy to block the
29			process. no more!
30			- no longer rely on dst path in aio_copy when futime is available.
31
32	root	1.181	3.19 Tue Apr 21 22:05:21 CEST 2009
33			- more perl 5.10 workarounds for aio_read and write.
34			- aio_write no longer modifies the sv (if possible).
35			- aio_read now works correctly with magic values.
36
37	root	1.180	3.18 Sun Apr 19 21:17:32 CEST 2009
38	root	1.179	- better diagnostics when some aio_* functions get passed an illegal fh.
39	root	1.180	- try to avoid crashes due to incompatible 5.10 API changes. grmbl.
40	root	1.178
41	root	1.177	3.17 Thu Nov 20 08:45:36 CET 2008
42	root	1.176	- (libeio) added aio_sync_file_range (untested).
43	root	1.177	- add aio_busy to @IO::AIO::AIO_REQ.
44	root	1.175
45	root	1.174	3.16 Wed Oct 22 18:28:01 CEST 2008
46	root	1.173	- use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
47			part to improve portability to perl 5.8 (reported by szymon).
48
49	root	1.172	3.15 Mon Oct 13 00:39:55 CEST 2008
50	root	1.171	- automatic removal of feeders was broken.
51			- (libeio) use a more robust method to detect whether a feeder
52			has added something to the group or not.
53
54	root	1.170	3.1 Thu Oct 2 13:34:40 CEST 2008
55	root	1.168	- pre-deref the passed callback object, for increased speed
56			and decreased memory usage.
57	root	1.167	- call on_next_submit callback even for aio_group - impact unknown,
58	root	1.166	but seems more correct.
59	root	1.168	- $req->cb now returns the original callback.
60	root	1.166	- (libeio) pass EIO_GROUP/aio_group requests through the queue without
61			requiring a thread switch.
62	root	1.169	- (libeio) status code of aio_futime and aio_utime was always passed 0.
63	root	1.166	- do some other µ-optimisations.
64
65	root	1.165	3.07 Sat Aug 2 16:06:13 CEST 2008
66			- do not include LIBS in autoconf tests.
67
68	root	1.164	3.06 Tue Jul 15 12:41:32 CEST 2008
69	root	1.162	- move preadwritelock definition before it's first reference,
70	root	1.164	to make it compile again on broken platforms (they still exist)
71			or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
72	root	1.162
73	root	1.161	3.05 Thu Jun 19 23:23:52 CEST 2008
74	root	1.160	- work around perl overriding readdir etc. with thread-unsafe
75	root	1.161	(sic!) versions.
76	root	1.160
77	root	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
78			- (libeio) fix eio_mknod, which confused it's arguments.
79	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
80			is stupid.
81	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
82			- (libeio) fix a bug that could potentially cause IO::AIO
83			not to get initialised properly.
84	root	1.158
85	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
86	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
87	root	1.155	- (libeio) work around broken bsd headers once more.
88	root	1.154	- reduce shared library size again by not including wrappers.
89	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
90			- document the new IO::AIO::poll_cb result value.
91	root	1.153
92	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
93	root	1.150	- fix a memory leak on aio_readlink.
94			- bring back working fchmod.
95	root	1.151	- nop and busy now set result to 0.
96			- set errno to ENOMEM when allocation fails.
97	root	1.150
98	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
99			- (libeio) make it compile on systems without readahead or readdir_r.
100	root	1.148	- (libeio) improve configure check for readahead availability.
101			- do not try to link against -lrt.
102	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
103
104	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
105	root	1.145	- added bin/treescan to the distribution.
106			- switched to using libeio.
107			- LOTS OF INCOMPATIBLE CHANGES:
108			- remove signal functionality, it is not worth the effort.
109			- max_outstanding no longer returns the previous number of requests.
110			- poll_cb no longer returns number of requests.
111	root	1.143
112	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
113	root	1.141	- port to solaris perls configured for old posix
114			(analysed by Jost Krieger).
115	root	1.142	- keep a reference to the perl filehandle object in aio_close,
116			so it doesn't get closed prematurely, leading to ugly races.
117	root	1.141
118	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
119	root	1.137	- fix treescan output duplication and improve output ordering.
120			also display files given on the commandline.
121	root	1.140	- use a different algorithm for aio_close that is faster
122			and probably has even lower chances of blocking.
123	root	1.138	- do our own stack memory management for threads - linux
124			allocates outrageous amounts of VM (not so bad unless you
125			use mlockall...), which severely limits the number of threads
126	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
127			and 4096 * sizeof (long) (usually this is 16..64k).
128	root	1.137
129	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
130	root	1.134	- added aio_sync.
131	root	1.135	- added aio_pathsync.
132	root	1.136	- fix prototypes of (void) functions.
133	root	1.134
134	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
135			- perlio isn't generally threadsafe, so aio_close could not work reliably.
136			aio_close now tries a safe hack that might not be that asynchronous
137			(see the manpage for details).
138			- discard callback return values as to not grow the stack endlessly
139			when poll_cb handles many requests without returning.
140			- minor code cleanups.
141
142	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
143	root	1.131	- replaced _fd2fh with faster xs code.
144			- aio_close will now try to do "the right thing" and thus might
145			work sensibly for the very first time.
146
147	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
148	root	1.129	- after fork, invest some work to make sure that the poll_fileno
149			stays stable (by dup2'ing the new fd over the old one), to make
150			it easier for programs/libs that don't control their forking
151			behaviour and cannot recreate their watchers.
152
153	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
154	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
155			successfully demonstrated that you can block on futimes...).
156	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
157			internally (useful for sockets or O_APPEND handles).
158	root	1.126	- allow undef for length in aio_write.
159			- negative dataoffsets work as expected now in aio_read/aio_write.
160	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
161	root	1.125	have a larger range then.
162	root	1.120	- shared code between BDB and IO::AIO.
163	root	1.127	- aio_busy was completely broken. now fixed.
164			- readahead emulation now returns something.
165	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
166			(should never happen, though).
167	root	1.127	- large changes to make it partially compile and run on win32,
168			but win32 lacks too much functionality, and perl overrides way
169			too many functions with crashing versions.
170	root	1.120
171	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
172			- fix install path (Andreas J. Koenig).
173
174	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
175	root	1.114	- added aio_rmtree.
176	root	1.115	- wow, aio_mkdir was missing.
177	root	1.116	- aio_load did return undef on error, not -1.
178	root	1.117	- use prefixexp not prefix in autoconf.pm
179			(suggested by ... rt.cpan.org unreachable).
180	root	1.118	- avoid installing autoconf.pm.
181	root	1.114
182	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
183	root	1.112	- added aio_load.
184
185	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
186			- fix off-by-one bug in aio_read, causing memory corruption
187			or crashes.
188
189	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
190	root	1.108	- minor doc updates.
191	root	1.107	- minor cleanups.
192			- IO::AIO::poll returns request count.
193	root	1.109	- undocumented and unfinished async-signal-reporting.
194	root	1.107
195	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
196	root	1.100	- minor doc updates.
197	root	1.101	- added aio_readlink.
198			- properly zero-terminate aio_read buffer.
199			- fix aio_read/write with nonzero dataoffset.
200	root	1.104	- reduced size of aio request structure.
201	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
202	root	1.105	do not leak request in that case, either.
203	root	1.94
204	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
205	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
206			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
207	root	1.95	- fix a bug in aio_move where it would fail everytime
208			it would have to copy files manually.
209	root	1.98	- doc updates.
210	root	1.94	- start threads only on (very low) demand.
211	root	1.97	- end superfluous threads automatically after 10s idling.
212	root	1.98	- add IO::AIO::max_idle to control this.
213	root	1.94	- some tuning applied to random places.
214	root	1.95	- add aio_mknod.
215	root	1.59
216	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
217	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
218	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
219	root	1.68	- aio requests can be cancelled.
220	root	1.81	- callbacks can be (re-)set later.
221	root	1.93	- aio requests can choose between 9 priorities.
222	root	1.83	- add aio_group: aio requests can be grouped
223			into composite requests.
224			- generator interface for groups.
225	root	1.89	- add IO::AIO::poll_some.
226	root	1.72	- major documentation improvements.
227			- very minor bugfixes.
228	root	1.76	- add aio_nop for dummy requests.
229	root	1.84	- add aio_busy mainly for benchmarking and debugging.
230	root	1.79	- use "fast" mutexes on linux.
231	root	1.80	- use dynamic (and larger) buffers instead of
232			putting them onto the stack.
233			- optimise x86 and amd64 a bit.
234			- better error checking when ENOMEM.
235	root	1.85	- hopefully fix mem and dirp leaks on fork.
236	root	1.92	- warn about broken perl malloc.
237	root	1.88	- compiles on cygwin (but pread is broken on cygwin
238			which is not detected by autoconf, so you have to
239			edit autoconf/config.h yourself to enable emulation).
240	root	1.68
241	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
242	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
243
244	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
245			- codename "jost"
246			- AIX/Solaris(?) aren't being helpful again, hardcode a value
247			for NAME_MAX and drive with your eyes closed (reported by
248			wcooley@nakedape.cc).
249	root	1.63
250	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
251	root	1.61	- another minor bug in aio_scandir, again, the callback was called
252			twice when the directory can't be stat'ed.
253
254	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
255			- grr, another minor bug in aio_scandir, this time resulting
256			in a runtime error.
257
258	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
259	root	1.58	- aio_scandir errornously called callback twice in some cases.
260	root	1.57	- added AnyEvent example.
261
262	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
263	root	1.54	- no longer include $Config{libs}, as distros include too much
264	root	1.56	garbage in there that is not installed on typical systems
265	root	1.54	(for example, debian links perl against -lgdbm and many more
266			libraries despite perl not needing it, slowing down startup and
267			wasting memory).
268
269	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
270			- added aio_readdir, aio_scandir.
271	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
272			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
273			support is unavailable on my solaris 8 machine, but preliminary
274			code is there. What's lacking is configury stuff and testing...).
275	root	1.46
276	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
277	root	1.51	- create the aio threads on demand only (good after forking).
278	root	1.41	- somebody nagged about C89 compatibility, so this release should
279	root	1.42	be C89 compatible, but no guarantees for future ones.
280	root	1.43	- abort when the configure script fails.
281	root	1.41
282	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
283	root	1.93	- forgot to recreate the pipe after forking, this could cause
284	root	1.40	deadlocks.
285
286	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
287	root	1.33	- properly propagate exceptions from callbacks, instead of silently
288			eating them.
289	root	1.38	- use a different fork algorithm that avoids recursive callback
290			invocations and reduces fork latency in busy processes.
291	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
292			length after reading.
293			- fix a bug where the child would process some outstanding requests
294			from the parent.
295			- make a copy of the callback scalar, to avoid some very uncommon
296			(but valid) usages where the callback scalar changes.
297			- the callback was never freed in aio_read/aio_write.
298	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
299			scalar for better error reporting.
300	root	1.33
301	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
302			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
303	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
304			the external filename encoding first.
305	root	1.32	- fix the bug where filehandles could leak (again).
306	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
307			with your underdocumented, broken and outdated OS.
308			- fork'ing should now be officially supported (where linux and
309			posix contradict each other, I followed posix).
310	root	1.32	- only call read() once per poll, not twice (speedup).
311			- new functions: aio_rmdir, aio_symlink.
312	root	1.31	- force callback arguments to be undef or a reference, for better
313			error catching.
314	root	1.1
315	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
316	root	1.25	- added configure script to detect availability of some calls.
317	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
318	root	1.23	feedback yet).
319	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
320			and readahead via manual reading on platforms lacking those.
321	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
322			from Linux::AIO.
323	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
324			compile with it enabled. Probably breaks others. Oh well.
325	root	1.24	- try to be more careful with errno on non-threaded perls.
326	root	1.26	- cygwins perl insisted on a matching open mode when morphing
327			the fd to an fh.
328	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
329			do that for pathnames, too, in the future, so make sure you
330			properly encode your pathnames.
331	root	1.18
332	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
333			- aio_open did not reliably deliver (open) filehandles.
334	root	1.16	- all aio_*-functions keep a reference to the filehandle so
335			it doesn't go away while the aio requests is working on it.
336			- disable warnings in AIO.pm.
337
338	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
339			- allow recursive calls to poll_cb, use less locking calls, too.
340			- fix the Gtk2-example in the SYNOPSIS.
341	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
342			from Linux::AIO.
343			(found by compiling on cygwin. Unfortunately, cygwin declares but
344			does not implement pread/pwrite).
345			- only include <sys/syscall.h> on linux.
346
347	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
348	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
349			need it anyway.
350			- link against -lrt, as it might contain goodies such as fdatasync,
351			and often aio_read, which we do not use yet, but it shouldn't hurt.
352
353	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
354	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
355	root	1.10	- make callback argument optional for all calls.
356	root	1.8
357	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
358	root	1.5	- restructured manpage.
359	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
360			- remove explicit context support so I don't have to maintain
361			it for threaded perls (i.e. it should work now :).
362	root	1.5
363	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
364	root	1.2	- return immediately from poll_wait if nreqs==0.
365			- get rid of the request pipe and use faster thread-thread
366	root	1.3	communications for most requests and responses.
367	root	1.2
368	root	1.1	0.1
369			- cloned from Linux::AIO, which is very similar.
370