[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

        - (libeio) replaced quicksort+insertion sort by a tuned radix
          sort + insertion sort, resulting in comparable runtime (usually
          faster) to the old version, but without any ill side effects on
          degenerated (for quicksort) data.
        - (libeio) correctly sort dirs by inodes if we have perfect type
          knowledge and DIRS_FIRST is used.
        - (libeio) internally the wrong DT_* constants were used, but no
          known system has differing EIO_DT_*/DT_* values, so not an issue.
        - removed a (harmless) assert that was left over on the code
          but should not have been.

3.23 Sat Jun 13 16:57:58 CEST 2009
        - fix off-by-one bug in aio_readdir that was introduced in the
          rushed 3.22 release.

3.22 Sat Jun 13 15:32:40 CEST 2009
        - speed up readdirx sort algorithm slightly.
        - bin/treescan was missing from distro tarball.

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:	1.195
Committed:	Mon Jun 15 05:34:49 2009 UTC (14 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.194:	+9 -5 lines
Log Message:	doh, lotsa work
#	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	1.195	- (libeio) replaced quicksort+insertion sort by a tuned radix
10			sort + insertion sort, resulting in comparable runtime (usually
11			faster) to the old version, but without any ill side effects on
12			degenerated (for quicksort) data.
13			- (libeio) correctly sort dirs by inodes if we have perfect type
14	root	1.194	knowledge and DIRS_FIRST is used.
15	root	1.195	- (libeio) internally the wrong DT_* constants were used, but no
16			known system has differing EIO_DT_/DT_ values, so not an issue.
17			- removed a (harmless) assert that was left over on the code
18			but should not have been.
19	root	1.194
20	root	1.193	3.23 Sat Jun 13 16:57:58 CEST 2009
21			- fix off-by-one bug in aio_readdir that was introduced in the
22			rushed 3.22 release.
23
24	root	1.192	3.22 Sat Jun 13 15:32:40 CEST 2009
25	root	1.191	- speed up readdirx sort algorithm slightly.
26	root	1.192	- bin/treescan was missing from distro tarball.
27	root	1.191
28	root	1.190	3.21 Fri Jun 12 18:45:53 CEST 2009
29	root	1.187	- new options --dirs and --files for treescan.
30	root	1.188	- install bin/treescan by default.
31	root	1.189	- (libeio) aio_readdir can now be cancelled while executing.
32	root	1.190	- fix a printf format string for 64 bit systems (could lead
33			to problems on big endian 64 bit systems).
34			- do not use qsort() but our own algorithm: glibc initialises
35			the whole locale and I/O subsystem inside qsort, causing
36			a stack overflow on 32 bit machines. The new sort uses much less
37			stack and is more than twice as fast in typical situations.
38	root	1.187
39	root	1.186	3.2 Sun Jun 7 20:30:05 CEST 2009
40	root	1.182	- (libeio) pwrite emulation was even more flawed than intended and did
41			not restore the file offset.
42	root	1.183	- add aio_readdirx, which can return inode and filetype and sort
43			the names in various ways.
44	root	1.182	- unfortunately, utime, chmod, chown on an open file that has just
45			been written can easily block, which caused aio_copy to block the
46			process. no more!
47			- no longer rely on dst path in aio_copy when futime is available.
48
49	root	1.181	3.19 Tue Apr 21 22:05:21 CEST 2009
50			- more perl 5.10 workarounds for aio_read and write.
51			- aio_write no longer modifies the sv (if possible).
52			- aio_read now works correctly with magic values.
53
54	root	1.180	3.18 Sun Apr 19 21:17:32 CEST 2009
55	root	1.179	- better diagnostics when some aio_* functions get passed an illegal fh.
56	root	1.180	- try to avoid crashes due to incompatible 5.10 API changes. grmbl.
57	root	1.178
58	root	1.177	3.17 Thu Nov 20 08:45:36 CET 2008
59	root	1.176	- (libeio) added aio_sync_file_range (untested).
60	root	1.177	- add aio_busy to @IO::AIO::AIO_REQ.
61	root	1.175
62	root	1.174	3.16 Wed Oct 22 18:28:01 CEST 2008
63	root	1.173	- use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
64			part to improve portability to perl 5.8 (reported by szymon).
65
66	root	1.172	3.15 Mon Oct 13 00:39:55 CEST 2008
67	root	1.171	- automatic removal of feeders was broken.
68			- (libeio) use a more robust method to detect whether a feeder
69			has added something to the group or not.
70
71	root	1.170	3.1 Thu Oct 2 13:34:40 CEST 2008
72	root	1.168	- pre-deref the passed callback object, for increased speed
73			and decreased memory usage.
74	root	1.167	- call on_next_submit callback even for aio_group - impact unknown,
75	root	1.166	but seems more correct.
76	root	1.168	- $req->cb now returns the original callback.
77	root	1.166	- (libeio) pass EIO_GROUP/aio_group requests through the queue without
78			requiring a thread switch.
79	root	1.169	- (libeio) status code of aio_futime and aio_utime was always passed 0.
80	root	1.166	- do some other µ-optimisations.
81
82	root	1.165	3.07 Sat Aug 2 16:06:13 CEST 2008
83			- do not include LIBS in autoconf tests.
84
85	root	1.164	3.06 Tue Jul 15 12:41:32 CEST 2008
86	root	1.162	- move preadwritelock definition before it's first reference,
87	root	1.164	to make it compile again on broken platforms (they still exist)
88			or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
89	root	1.162
90	root	1.161	3.05 Thu Jun 19 23:23:52 CEST 2008
91	root	1.160	- work around perl overriding readdir etc. with thread-unsafe
92	root	1.161	(sic!) versions.
93	root	1.160
94	root	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
95			- (libeio) fix eio_mknod, which confused it's arguments.
96	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
97			is stupid.
98	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
99			- (libeio) fix a bug that could potentially cause IO::AIO
100			not to get initialised properly.
101	root	1.158
102	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
103	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
104	root	1.155	- (libeio) work around broken bsd headers once more.
105	root	1.154	- reduce shared library size again by not including wrappers.
106	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
107			- document the new IO::AIO::poll_cb result value.
108	root	1.153
109	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
110	root	1.150	- fix a memory leak on aio_readlink.
111			- bring back working fchmod.
112	root	1.151	- nop and busy now set result to 0.
113			- set errno to ENOMEM when allocation fails.
114	root	1.150
115	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
116			- (libeio) make it compile on systems without readahead or readdir_r.
117	root	1.148	- (libeio) improve configure check for readahead availability.
118			- do not try to link against -lrt.
119	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
120
121	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
122	root	1.145	- added bin/treescan to the distribution.
123			- switched to using libeio.
124			- LOTS OF INCOMPATIBLE CHANGES:
125			- remove signal functionality, it is not worth the effort.
126			- max_outstanding no longer returns the previous number of requests.
127			- poll_cb no longer returns number of requests.
128	root	1.143
129	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
130	root	1.141	- port to solaris perls configured for old posix
131			(analysed by Jost Krieger).
132	root	1.142	- keep a reference to the perl filehandle object in aio_close,
133			so it doesn't get closed prematurely, leading to ugly races.
134	root	1.141
135	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
136	root	1.137	- fix treescan output duplication and improve output ordering.
137			also display files given on the commandline.
138	root	1.140	- use a different algorithm for aio_close that is faster
139			and probably has even lower chances of blocking.
140	root	1.138	- do our own stack memory management for threads - linux
141			allocates outrageous amounts of VM (not so bad unless you
142			use mlockall...), which severely limits the number of threads
143	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
144			and 4096 * sizeof (long) (usually this is 16..64k).
145	root	1.137
146	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
147	root	1.134	- added aio_sync.
148	root	1.135	- added aio_pathsync.
149	root	1.136	- fix prototypes of (void) functions.
150	root	1.134
151	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
152			- perlio isn't generally threadsafe, so aio_close could not work reliably.
153			aio_close now tries a safe hack that might not be that asynchronous
154			(see the manpage for details).
155			- discard callback return values as to not grow the stack endlessly
156			when poll_cb handles many requests without returning.
157			- minor code cleanups.
158
159	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
160	root	1.131	- replaced _fd2fh with faster xs code.
161			- aio_close will now try to do "the right thing" and thus might
162			work sensibly for the very first time.
163
164	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
165	root	1.129	- after fork, invest some work to make sure that the poll_fileno
166			stays stable (by dup2'ing the new fd over the old one), to make
167			it easier for programs/libs that don't control their forking
168			behaviour and cannot recreate their watchers.
169
170	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
171	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
172			successfully demonstrated that you can block on futimes...).
173	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
174			internally (useful for sockets or O_APPEND handles).
175	root	1.126	- allow undef for length in aio_write.
176			- negative dataoffsets work as expected now in aio_read/aio_write.
177	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
178	root	1.125	have a larger range then.
179	root	1.120	- shared code between BDB and IO::AIO.
180	root	1.127	- aio_busy was completely broken. now fixed.
181			- readahead emulation now returns something.
182	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
183			(should never happen, though).
184	root	1.127	- large changes to make it partially compile and run on win32,
185			but win32 lacks too much functionality, and perl overrides way
186			too many functions with crashing versions.
187	root	1.120
188	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
189			- fix install path (Andreas J. Koenig).
190
191	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
192	root	1.114	- added aio_rmtree.
193	root	1.115	- wow, aio_mkdir was missing.
194	root	1.116	- aio_load did return undef on error, not -1.
195	root	1.117	- use prefixexp not prefix in autoconf.pm
196			(suggested by ... rt.cpan.org unreachable).
197	root	1.118	- avoid installing autoconf.pm.
198	root	1.114
199	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
200	root	1.112	- added aio_load.
201
202	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
203			- fix off-by-one bug in aio_read, causing memory corruption
204			or crashes.
205
206	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
207	root	1.108	- minor doc updates.
208	root	1.107	- minor cleanups.
209			- IO::AIO::poll returns request count.
210	root	1.109	- undocumented and unfinished async-signal-reporting.
211	root	1.107
212	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
213	root	1.100	- minor doc updates.
214	root	1.101	- added aio_readlink.
215			- properly zero-terminate aio_read buffer.
216			- fix aio_read/write with nonzero dataoffset.
217	root	1.104	- reduced size of aio request structure.
218	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
219	root	1.105	do not leak request in that case, either.
220	root	1.94
221	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
222	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
223			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
224	root	1.95	- fix a bug in aio_move where it would fail everytime
225			it would have to copy files manually.
226	root	1.98	- doc updates.
227	root	1.94	- start threads only on (very low) demand.
228	root	1.97	- end superfluous threads automatically after 10s idling.
229	root	1.98	- add IO::AIO::max_idle to control this.
230	root	1.94	- some tuning applied to random places.
231	root	1.95	- add aio_mknod.
232	root	1.59
233	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
234	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
235	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
236	root	1.68	- aio requests can be cancelled.
237	root	1.81	- callbacks can be (re-)set later.
238	root	1.93	- aio requests can choose between 9 priorities.
239	root	1.83	- add aio_group: aio requests can be grouped
240			into composite requests.
241			- generator interface for groups.
242	root	1.89	- add IO::AIO::poll_some.
243	root	1.72	- major documentation improvements.
244			- very minor bugfixes.
245	root	1.76	- add aio_nop for dummy requests.
246	root	1.84	- add aio_busy mainly for benchmarking and debugging.
247	root	1.79	- use "fast" mutexes on linux.
248	root	1.80	- use dynamic (and larger) buffers instead of
249			putting them onto the stack.
250			- optimise x86 and amd64 a bit.
251			- better error checking when ENOMEM.
252	root	1.85	- hopefully fix mem and dirp leaks on fork.
253	root	1.92	- warn about broken perl malloc.
254	root	1.88	- compiles on cygwin (but pread is broken on cygwin
255			which is not detected by autoconf, so you have to
256			edit autoconf/config.h yourself to enable emulation).
257	root	1.68
258	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
259	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
260
261	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
262			- codename "jost"
263			- AIX/Solaris(?) aren't being helpful again, hardcode a value
264			for NAME_MAX and drive with your eyes closed (reported by
265			wcooley@nakedape.cc).
266	root	1.63
267	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
268	root	1.61	- another minor bug in aio_scandir, again, the callback was called
269			twice when the directory can't be stat'ed.
270
271	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
272			- grr, another minor bug in aio_scandir, this time resulting
273			in a runtime error.
274
275	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
276	root	1.58	- aio_scandir errornously called callback twice in some cases.
277	root	1.57	- added AnyEvent example.
278
279	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
280	root	1.54	- no longer include $Config{libs}, as distros include too much
281	root	1.56	garbage in there that is not installed on typical systems
282	root	1.54	(for example, debian links perl against -lgdbm and many more
283			libraries despite perl not needing it, slowing down startup and
284			wasting memory).
285
286	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
287			- added aio_readdir, aio_scandir.
288	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
289			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
290			support is unavailable on my solaris 8 machine, but preliminary
291			code is there. What's lacking is configury stuff and testing...).
292	root	1.46
293	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
294	root	1.51	- create the aio threads on demand only (good after forking).
295	root	1.41	- somebody nagged about C89 compatibility, so this release should
296	root	1.42	be C89 compatible, but no guarantees for future ones.
297	root	1.43	- abort when the configure script fails.
298	root	1.41
299	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
300	root	1.93	- forgot to recreate the pipe after forking, this could cause
301	root	1.40	deadlocks.
302
303	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
304	root	1.33	- properly propagate exceptions from callbacks, instead of silently
305			eating them.
306	root	1.38	- use a different fork algorithm that avoids recursive callback
307			invocations and reduces fork latency in busy processes.
308	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
309			length after reading.
310			- fix a bug where the child would process some outstanding requests
311			from the parent.
312			- make a copy of the callback scalar, to avoid some very uncommon
313			(but valid) usages where the callback scalar changes.
314			- the callback was never freed in aio_read/aio_write.
315	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
316			scalar for better error reporting.
317	root	1.33
318	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
319			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
320	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
321			the external filename encoding first.
322	root	1.32	- fix the bug where filehandles could leak (again).
323	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
324			with your underdocumented, broken and outdated OS.
325			- fork'ing should now be officially supported (where linux and
326			posix contradict each other, I followed posix).
327	root	1.32	- only call read() once per poll, not twice (speedup).
328			- new functions: aio_rmdir, aio_symlink.
329	root	1.31	- force callback arguments to be undef or a reference, for better
330			error catching.
331	root	1.1
332	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
333	root	1.25	- added configure script to detect availability of some calls.
334	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
335	root	1.23	feedback yet).
336	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
337			and readahead via manual reading on platforms lacking those.
338	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
339			from Linux::AIO.
340	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
341			compile with it enabled. Probably breaks others. Oh well.
342	root	1.24	- try to be more careful with errno on non-threaded perls.
343	root	1.26	- cygwins perl insisted on a matching open mode when morphing
344			the fd to an fh.
345	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
346			do that for pathnames, too, in the future, so make sure you
347			properly encode your pathnames.
348	root	1.18
349	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
350			- aio_open did not reliably deliver (open) filehandles.
351	root	1.16	- all aio_*-functions keep a reference to the filehandle so
352			it doesn't go away while the aio requests is working on it.
353			- disable warnings in AIO.pm.
354
355	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
356			- allow recursive calls to poll_cb, use less locking calls, too.
357			- fix the Gtk2-example in the SYNOPSIS.
358	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
359			from Linux::AIO.
360			(found by compiling on cygwin. Unfortunately, cygwin declares but
361			does not implement pread/pwrite).
362			- only include <sys/syscall.h> on linux.
363
364	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
365	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
366			need it anyway.
367			- link against -lrt, as it might contain goodies such as fdatasync,
368			and often aio_read, which we do not use yet, but it shouldn't hurt.
369
370	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
371	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
372	root	1.10	- make callback argument optional for all calls.
373	root	1.8
374	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
375	root	1.5	- restructured manpage.
376	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
377			- remove explicit context support so I don't have to maintain
378			it for threaded perls (i.e. it should work now :).
379	root	1.5
380	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
381	root	1.2	- return immediately from poll_wait if nreqs==0.
382			- get rid of the request pipe and use faster thread-thread
383	root	1.3	communications for most requests and responses.
384	root	1.2
385	root	1.1	0.1
386			- cloned from Linux::AIO, which is very similar.
387