[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
TODO: fallocate, if it wouldn't be so useless.

        - more OS X workarounds (patch by Tokuhiro Matsuno).

3.26 Tue Jun 30 09:33:26 CEST 2009
        - os x of course claims posix 2008 but lacks posix_fadvise. try to work
          around this horribly broken OS in a somewhat hackish way. might help
          other os's too.

3.25 Sat Jun 27 05:18:26 CEST 2009
        - added IO::AIO::fadvise and IO::AIO::sendfile.
        - (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.
        - use more correct types (change IO length from IV to VAL64,
          which makes a difference on systems without 64 bit perls).

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:	1.200
Committed:	Wed Jul 1 08:11:24 2009 UTC (14 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.199:	+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	1.196	TODO: fallocate, if it wouldn't be so useless.
9	root	1.100
10	root	1.200	- more OS X workarounds (patch by Tokuhiro Matsuno).
11
12	root	1.199	3.26 Tue Jun 30 09:33:26 CEST 2009
13			- os x of course claims posix 2008 but lacks posix_fadvise. try to work
14			around this horribly broken OS in a somewhat hackish way. might help
15			other os's too.
16
17	root	1.198	3.25 Sat Jun 27 05:18:26 CEST 2009
18	root	1.197	- added IO::AIO::fadvise and IO::AIO::sendfile.
19	root	1.195	- (libeio) replaced quicksort+insertion sort by a tuned radix
20			sort + insertion sort, resulting in comparable runtime (usually
21			faster) to the old version, but without any ill side effects on
22			degenerated (for quicksort) data.
23			- (libeio) correctly sort dirs by inodes if we have perfect type
24	root	1.194	knowledge and DIRS_FIRST is used.
25	root	1.195	- (libeio) internally the wrong DT_* constants were used, but no
26			known system has differing EIO_DT_/DT_ values, so not an issue.
27			- removed a (harmless) assert that was left over on the code
28			but should not have been.
29	root	1.196	- use more correct types (change IO length from IV to VAL64,
30			which makes a difference on systems without 64 bit perls).
31	root	1.194
32	root	1.193	3.23 Sat Jun 13 16:57:58 CEST 2009
33			- fix off-by-one bug in aio_readdir that was introduced in the
34			rushed 3.22 release.
35
36	root	1.192	3.22 Sat Jun 13 15:32:40 CEST 2009
37	root	1.191	- speed up readdirx sort algorithm slightly.
38	root	1.192	- bin/treescan was missing from distro tarball.
39	root	1.191
40	root	1.190	3.21 Fri Jun 12 18:45:53 CEST 2009
41	root	1.187	- new options --dirs and --files for treescan.
42	root	1.188	- install bin/treescan by default.
43	root	1.189	- (libeio) aio_readdir can now be cancelled while executing.
44	root	1.190	- fix a printf format string for 64 bit systems (could lead
45			to problems on big endian 64 bit systems).
46			- do not use qsort() but our own algorithm: glibc initialises
47			the whole locale and I/O subsystem inside qsort, causing
48			a stack overflow on 32 bit machines. The new sort uses much less
49			stack and is more than twice as fast in typical situations.
50	root	1.187
51	root	1.186	3.2 Sun Jun 7 20:30:05 CEST 2009
52	root	1.182	- (libeio) pwrite emulation was even more flawed than intended and did
53			not restore the file offset.
54	root	1.183	- add aio_readdirx, which can return inode and filetype and sort
55			the names in various ways.
56	root	1.182	- unfortunately, utime, chmod, chown on an open file that has just
57			been written can easily block, which caused aio_copy to block the
58			process. no more!
59			- no longer rely on dst path in aio_copy when futime is available.
60
61	root	1.181	3.19 Tue Apr 21 22:05:21 CEST 2009
62			- more perl 5.10 workarounds for aio_read and write.
63			- aio_write no longer modifies the sv (if possible).
64			- aio_read now works correctly with magic values.
65
66	root	1.180	3.18 Sun Apr 19 21:17:32 CEST 2009
67	root	1.179	- better diagnostics when some aio_* functions get passed an illegal fh.
68	root	1.180	- try to avoid crashes due to incompatible 5.10 API changes. grmbl.
69	root	1.178
70	root	1.177	3.17 Thu Nov 20 08:45:36 CET 2008
71	root	1.176	- (libeio) added aio_sync_file_range (untested).
72	root	1.177	- add aio_busy to @IO::AIO::AIO_REQ.
73	root	1.175
74	root	1.174	3.16 Wed Oct 22 18:28:01 CEST 2008
75	root	1.173	- use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
76			part to improve portability to perl 5.8 (reported by szymon).
77
78	root	1.172	3.15 Mon Oct 13 00:39:55 CEST 2008
79	root	1.171	- automatic removal of feeders was broken.
80			- (libeio) use a more robust method to detect whether a feeder
81			has added something to the group or not.
82
83	root	1.170	3.1 Thu Oct 2 13:34:40 CEST 2008
84	root	1.168	- pre-deref the passed callback object, for increased speed
85			and decreased memory usage.
86	root	1.167	- call on_next_submit callback even for aio_group - impact unknown,
87	root	1.166	but seems more correct.
88	root	1.168	- $req->cb now returns the original callback.
89	root	1.166	- (libeio) pass EIO_GROUP/aio_group requests through the queue without
90			requiring a thread switch.
91	root	1.169	- (libeio) status code of aio_futime and aio_utime was always passed 0.
92	root	1.166	- do some other µ-optimisations.
93
94	root	1.165	3.07 Sat Aug 2 16:06:13 CEST 2008
95			- do not include LIBS in autoconf tests.
96
97	root	1.164	3.06 Tue Jul 15 12:41:32 CEST 2008
98	root	1.162	- move preadwritelock definition before it's first reference,
99	root	1.164	to make it compile again on broken platforms (they still exist)
100			or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
101	root	1.162
102	root	1.161	3.05 Thu Jun 19 23:23:52 CEST 2008
103	root	1.160	- work around perl overriding readdir etc. with thread-unsafe
104	root	1.161	(sic!) versions.
105	root	1.160
106	root	1.159	3.04 Wed Jun 18 01:35:38 CEST 2008
107			- (libeio) fix eio_mknod, which confused it's arguments.
108	root	1.158	- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
109			is stupid.
110	root	1.159	- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
111			- (libeio) fix a bug that could potentially cause IO::AIO
112			not to get initialised properly.
113	root	1.158
114	root	1.157	3.03 Thu May 29 05:33:30 CEST 2008
115	root	1.153	- (libeio) correctly call pthread_attr_destroy ().
116	root	1.155	- (libeio) work around broken bsd headers once more.
117	root	1.154	- reduce shared library size again by not including wrappers.
118	root	1.156	- max_outstanding could cause poll to enter a busy-waiting loop.
119			- document the new IO::AIO::poll_cb result value.
120	root	1.153
121	root	1.152	3.02 Mon May 12 02:32:02 CEST 2008
122	root	1.150	- fix a memory leak on aio_readlink.
123			- bring back working fchmod.
124	root	1.151	- nop and busy now set result to 0.
125			- set errno to ENOMEM when allocation fails.
126	root	1.150
127	root	1.149	3.01 Sun May 11 03:07:03 CEST 2008
128			- (libeio) make it compile on systems without readahead or readdir_r.
129	root	1.148	- (libeio) improve configure check for readahead availability.
130			- do not try to link against -lrt.
131	root	1.147	- use a separate configure script for IO::AIO (not the libeio one).
132
133	root	1.146	3.0 Sun May 11 00:57:14 CEST 2008
134	root	1.145	- added bin/treescan to the distribution.
135			- switched to using libeio.
136			- LOTS OF INCOMPATIBLE CHANGES:
137			- remove signal functionality, it is not worth the effort.
138			- max_outstanding no longer returns the previous number of requests.
139			- poll_cb no longer returns number of requests.
140	root	1.143
141	root	1.142	2.62 Sat Apr 26 13:59:33 CEST 2008
142	root	1.141	- port to solaris perls configured for old posix
143			(analysed by Jost Krieger).
144	root	1.142	- keep a reference to the perl filehandle object in aio_close,
145			so it doesn't get closed prematurely, leading to ugly races.
146	root	1.141
147	root	1.140	2.61 Wed Apr 16 18:45:02 CEST 2008
148	root	1.137	- fix treescan output duplication and improve output ordering.
149			also display files given on the commandline.
150	root	1.140	- use a different algorithm for aio_close that is faster
151			and probably has even lower chances of blocking.
152	root	1.138	- do our own stack memory management for threads - linux
153			allocates outrageous amounts of VM (not so bad unless you
154			use mlockall...), which severely limits the number of threads
155	root	1.139	on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
156			and 4096 * sizeof (long) (usually this is 16..64k).
157	root	1.137
158	root	1.136	2.6 Sun Mar 30 08:28:11 CEST 2008
159	root	1.134	- added aio_sync.
160	root	1.135	- added aio_pathsync.
161	root	1.136	- fix prototypes of (void) functions.
162	root	1.134
163	root	1.133	2.51 Sat Oct 6 16:04:54 CEST 2007
164			- perlio isn't generally threadsafe, so aio_close could not work reliably.
165			aio_close now tries a safe hack that might not be that asynchronous
166			(see the manpage for details).
167			- discard callback return values as to not grow the stack endlessly
168			when poll_cb handles many requests without returning.
169			- minor code cleanups.
170
171	root	1.132	2.5 Thu Oct 4 14:49:08 CEST 2007
172	root	1.131	- replaced _fd2fh with faster xs code.
173			- aio_close will now try to do "the right thing" and thus might
174			work sensibly for the very first time.
175
176	root	1.130	2.41 Mon Sep 24 21:28:21 CEST 2007
177	root	1.129	- after fork, invest some work to make sure that the poll_fileno
178			stays stable (by dup2'ing the new fd over the old one), to make
179			it easier for programs/libs that don't control their forking
180			behaviour and cannot recreate their watchers.
181
182	root	1.128	2.4 Sun Aug 5 18:44:22 CEST 2007
183	root	1.127	- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
184			successfully demonstrated that you can block on futimes...).
185	root	1.124	- allow undef as fileoffset for aio_read/write and use read/write(2)
186			internally (useful for sockets or O_APPEND handles).
187	root	1.126	- allow undef for length in aio_write.
188			- negative dataoffsets work as expected now in aio_read/aio_write.
189	root	1.124	- use NV instead of UV for 32 bit perls and file offsets, as NVs
190	root	1.125	have a larger range then.
191	root	1.120	- shared code between BDB and IO::AIO.
192	root	1.127	- aio_busy was completely broken. now fixed.
193			- readahead emulation now returns something.
194	root	1.121	- correctly set errno to ENOSYS on unimplemented functions
195			(should never happen, though).
196	root	1.127	- large changes to make it partially compile and run on win32,
197			but win32 lacks too much functionality, and perl overrides way
198			too many functions with crashing versions.
199	root	1.120
200	root	1.119	2.33 Tue Jan 23 23:55:41 CET 2007
201			- fix install path (Andreas J. Koenig).
202
203	root	1.118	2.32 Mon Jan 22 16:56:23 CET 2007
204	root	1.114	- added aio_rmtree.
205	root	1.115	- wow, aio_mkdir was missing.
206	root	1.116	- aio_load did return undef on error, not -1.
207	root	1.117	- use prefixexp not prefix in autoconf.pm
208			(suggested by ... rt.cpan.org unreachable).
209	root	1.118	- avoid installing autoconf.pm.
210	root	1.114
211	root	1.113	2.31 Sat Jan 6 03:46:02 CET 2007
212	root	1.112	- added aio_load.
213
214	root	1.111	2.3 Sat Dec 23 05:48:07 CET 2006
215			- fix off-by-one bug in aio_read, causing memory corruption
216			or crashes.
217
218	root	1.110	2.21 Fri Dec 22 05:03:38 CET 2006
219	root	1.108	- minor doc updates.
220	root	1.107	- minor cleanups.
221			- IO::AIO::poll returns request count.
222	root	1.109	- undocumented and unfinished async-signal-reporting.
223	root	1.107
224	root	1.103	2.2 Tue Oct 31 00:31:00 CET 2006
225	root	1.100	- minor doc updates.
226	root	1.101	- added aio_readlink.
227			- properly zero-terminate aio_read buffer.
228			- fix aio_read/write with nonzero dataoffset.
229	root	1.104	- reduced size of aio request structure.
230	root	1.106	- better diagnostics when pathnames etc. are not byte-encoded;
231	root	1.105	do not leak request in that case, either.
232	root	1.94
233	root	1.99	2.1 Sun Oct 29 02:01:57 CET 2006
234	root	1.98	- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
235			IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
236	root	1.95	- fix a bug in aio_move where it would fail everytime
237			it would have to copy files manually.
238	root	1.98	- doc updates.
239	root	1.94	- start threads only on (very low) demand.
240	root	1.97	- end superfluous threads automatically after 10s idling.
241	root	1.98	- add IO::AIO::max_idle to control this.
242	root	1.94	- some tuning applied to random places.
243	root	1.95	- add aio_mknod.
244	root	1.59
245	root	1.92	2.0 Thu Oct 26 18:27:58 CEST 2006
246	root	1.90	- minor incompatibility: max_outstanding semantics have changed.
247	root	1.86	- major rewrite, consider all functionality EXPERIMENTAL.
248	root	1.68	- aio requests can be cancelled.
249	root	1.81	- callbacks can be (re-)set later.
250	root	1.93	- aio requests can choose between 9 priorities.
251	root	1.83	- add aio_group: aio requests can be grouped
252			into composite requests.
253			- generator interface for groups.
254	root	1.89	- add IO::AIO::poll_some.
255	root	1.72	- major documentation improvements.
256			- very minor bugfixes.
257	root	1.76	- add aio_nop for dummy requests.
258	root	1.84	- add aio_busy mainly for benchmarking and debugging.
259	root	1.79	- use "fast" mutexes on linux.
260	root	1.80	- use dynamic (and larger) buffers instead of
261			putting them onto the stack.
262			- optimise x86 and amd64 a bit.
263			- better error checking when ENOMEM.
264	root	1.85	- hopefully fix mem and dirp leaks on fork.
265	root	1.92	- warn about broken perl malloc.
266	root	1.88	- compiles on cygwin (but pread is broken on cygwin
267			which is not detected by autoconf, so you have to
268			edit autoconf/config.h yourself to enable emulation).
269	root	1.68
270	root	1.67	1.8 Sat Jun 24 22:20:44 CEST 2006
271	root	1.66	- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
272
273	root	1.65	1.73 Wed Mar 1 22:49:32 CET 2006
274			- codename "jost"
275			- AIX/Solaris(?) aren't being helpful again, hardcode a value
276			for NAME_MAX and drive with your eyes closed (reported by
277			wcooley@nakedape.cc).
278	root	1.63
279	root	1.62	1.72 Thu Feb 2 00:40:44 CET 2006
280	root	1.61	- another minor bug in aio_scandir, again, the callback was called
281			twice when the directory can't be stat'ed.
282
283	root	1.60	1.71 Mon Dec 26 20:20:03 CET 2005
284			- grr, another minor bug in aio_scandir, this time resulting
285			in a runtime error.
286
287	root	1.59	1.7 Mon Dec 26 19:29:48 CET 2005
288	root	1.58	- aio_scandir errornously called callback twice in some cases.
289	root	1.57	- added AnyEvent example.
290
291	root	1.55	1.61 Wed Sep 7 19:40:42 CEST 2005
292	root	1.54	- no longer include $Config{libs}, as distros include too much
293	root	1.56	garbage in there that is not installed on typical systems
294	root	1.54	(for example, debian links perl against -lgdbm and many more
295			libraries despite perl not needing it, slowing down startup and
296			wasting memory).
297
298	root	1.53	1.6 Tue Aug 30 17:44:44 CEST 2005
299			- added aio_readdir, aio_scandir.
300	root	1.51	- added aio_sendfile, including sendfile emulation when sendfile
301			isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
302			support is unavailable on my solaris 8 machine, but preliminary
303			code is there. What's lacking is configury stuff and testing...).
304	root	1.46
305	root	1.44	1.5 Sat Aug 20 02:32:19 CEST 2005
306	root	1.51	- create the aio threads on demand only (good after forking).
307	root	1.41	- somebody nagged about C89 compatibility, so this release should
308	root	1.42	be C89 compatible, but no guarantees for future ones.
309	root	1.43	- abort when the configure script fails.
310	root	1.41
311	root	1.40	1.4 Wed Aug 17 08:07:27 CEST 2005
312	root	1.93	- forgot to recreate the pipe after forking, this could cause
313	root	1.40	deadlocks.
314
315	root	1.39	1.3 Wed Aug 17 07:25:54 CEST 2005
316	root	1.33	- properly propagate exceptions from callbacks, instead of silently
317			eating them.
318	root	1.38	- use a different fork algorithm that avoids recursive callback
319			invocations and reduces fork latency in busy processes.
320	root	1.37	- fix a bug where the buffer scalar in aio_read got assigned the wrong
321			length after reading.
322			- fix a bug where the child would process some outstanding requests
323			from the parent.
324			- make a copy of the callback scalar, to avoid some very uncommon
325			(but valid) usages where the callback scalar changes.
326			- the callback was never freed in aio_read/aio_write.
327	root	1.38	- aio_read/aio_write will now set the readonly flag on the data
328			scalar for better error reporting.
329	root	1.33
330	root	1.32	1.2 Wed Aug 17 01:22:58 CEST 2005
331			- verified on cygwin, linux/amd64+ia32+alpha, solaris.
332	root	1.31	- use SvPVbyte for filenames now. You need to encode your strings to
333			the external filename encoding first.
334	root	1.32	- fix the bug where filehandles could leak (again).
335	root	1.31	- clarify freebsd situation: make it work and tell me how, or go away
336			with your underdocumented, broken and outdated OS.
337			- fork'ing should now be officially supported (where linux and
338			posix contradict each other, I followed posix).
339	root	1.32	- only call read() once per poll, not twice (speedup).
340			- new functions: aio_rmdir, aio_symlink.
341	root	1.31	- force callback arguments to be undef or a reference, for better
342			error catching.
343	root	1.1
344	root	1.29	1.1 Sun Aug 7 05:27:23 CEST 2005
345	root	1.25	- added configure script to detect availability of some calls.
346	root	1.27	(imperfect, as we cannot detect things like -lrt due to missing
347	root	1.23	feedback yet).
348	root	1.27	- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
349			and readahead via manual reading on platforms lacking those.
350	root	1.19	- ported t/03_errors.t+framework by Brad Fitzpatrick
351			from Linux::AIO.
352	root	1.18	- removed XOPEN_SOURCE because stupid solaris 9 doesn't
353			compile with it enabled. Probably breaks others. Oh well.
354	root	1.24	- try to be more careful with errno on non-threaded perls.
355	root	1.26	- cygwins perl insisted on a matching open mode when morphing
356			the fd to an fh.
357	root	1.28	- convert sv's to "byte" encoding in aio_read/aio_write. Might
358			do that for pathnames, too, in the future, so make sure you
359			properly encode your pathnames.
360	root	1.18
361	root	1.17	1.0 Fri Jul 22 10:43:30 CEST 2005
362			- aio_open did not reliably deliver (open) filehandles.
363	root	1.16	- all aio_*-functions keep a reference to the filehandle so
364			it doesn't go away while the aio requests is working on it.
365			- disable warnings in AIO.pm.
366
367	root	1.15	0.9 Wed Jul 20 23:55:04 CEST 2005
368			- allow recursive calls to poll_cb, use less locking calls, too.
369			- fix the Gtk2-example in the SYNOPSIS.
370	root	1.14	- use pread/pwrite not pread64/pwrite64. this was simply a leftover
371			from Linux::AIO.
372			(found by compiling on cygwin. Unfortunately, cygwin declares but
373			does not implement pread/pwrite).
374			- only include <sys/syscall.h> on linux.
375
376	root	1.13	0.5 Tue Jul 12 13:03:09 CEST 2005
377	root	1.12	- removed #include <endian.h>, it's not portable, and we don't
378			need it anyway.
379			- link against -lrt, as it might contain goodies such as fdatasync,
380			and often aio_read, which we do not use yet, but it shouldn't hurt.
381
382	root	1.11	0.4 Mon Jul 11 05:28:25 CEST 2005
383	root	1.9	- added IO::AIO::flush, IO::AIO::poll.
384	root	1.10	- make callback argument optional for all calls.
385	root	1.8
386	root	1.7	0.3 Mon Jul 11 01:42:37 CEST 2005
387	root	1.5	- restructured manpage.
388	root	1.7	- added SYNOPSIS with examples for Event, Glib, Tk.
389			- remove explicit context support so I don't have to maintain
390			it for threaded perls (i.e. it should work now :).
391	root	1.5
392	root	1.4	0.2 Sun Jul 10 22:57:12 CEST 2005
393	root	1.2	- return immediately from poll_wait if nreqs==0.
394			- get rid of the request pipe and use faster thread-thread
395	root	1.3	communications for most requests and responses.
396	root	1.2
397	root	1.1	0.1
398			- cloned from Linux::AIO, which is very similar.
399