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Comparing IO-AIO/AIO.pm (file contents):
Revision 1.89 by root, Sun Oct 29 11:03:18 2006 UTC vs.
Revision 1.107 by root, Fri Jun 1 05:52:59 2007 UTC

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5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use IO::AIO; 7 use IO::AIO;
8 8
9 aio_open "/etc/passwd", O_RDONLY, 0, sub { 9 aio_open "/etc/passwd", O_RDONLY, 0, sub {
10 my ($fh) = @_; 10 my $fh = shift
11 or die "/etc/passwd: $!";
11 ... 12 ...
12 }; 13 };
13 14
14 aio_unlink "/tmp/file", sub { }; 15 aio_unlink "/tmp/file", sub { };
15 16
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61etc.), but can also be used to easily do operations in parallel that are 62etc.), but can also be used to easily do operations in parallel that are
62normally done sequentially, e.g. stat'ing many files, which is much faster 63normally done sequentially, e.g. stat'ing many files, which is much faster
63on a RAID volume or over NFS when you do a number of stat operations 64on a RAID volume or over NFS when you do a number of stat operations
64concurrently. 65concurrently.
65 66
66While this works on all types of file descriptors (for example sockets), 67While most of this works on all types of file descriptors (for example
67using these functions on file descriptors that support nonblocking 68sockets), using these functions on file descriptors that support
68operation (again, sockets, pipes etc.) is very inefficient. Use an event 69nonblocking operation (again, sockets, pipes etc.) is very inefficient or
70might not work (aio_read fails on sockets/pipes/fifos). Use an event loop
69loop for that (such as the L<Event|Event> module): IO::AIO will naturally 71for that (such as the L<Event|Event> module): IO::AIO will naturally fit
70fit into such an event loop itself. 72into such an event loop itself.
71 73
72In this version, a number of threads are started that execute your 74In this version, a number of threads are started that execute your
73requests and signal their completion. You don't need thread support 75requests and signal their completion. You don't need thread support
74in perl, and the threads created by this module will not be visible 76in perl, and the threads created by this module will not be visible
75to perl. In the future, this module might make use of the native aio 77to perl. In the future, this module might make use of the native aio
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98 poll => 'r', 100 poll => 'r',
99 cb => \&IO::AIO::poll_cb); 101 cb => \&IO::AIO::poll_cb);
100 102
101 # queue the request to open /etc/passwd 103 # queue the request to open /etc/passwd
102 aio_open "/etc/passwd", O_RDONLY, 0, sub { 104 aio_open "/etc/passwd", O_RDONLY, 0, sub {
103 my $fh = $_[0] 105 my $fh = shift
104 or die "error while opening: $!"; 106 or die "error while opening: $!";
105 107
106 # stat'ing filehandles is generally non-blocking 108 # stat'ing filehandles is generally non-blocking
107 my $size = -s $fh; 109 my $size = -s $fh;
108 110
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188use strict 'vars'; 190use strict 'vars';
189 191
190use base 'Exporter'; 192use base 'Exporter';
191 193
192BEGIN { 194BEGIN {
193 our $VERSION = '2.1'; 195 our $VERSION = '2.4';
194 196
195 our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat 197 our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close aio_stat
196 aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink 198 aio_lstat aio_unlink aio_rmdir aio_readdir aio_scandir aio_symlink
197 aio_fsync aio_fdatasync aio_readahead aio_rename aio_link aio_move 199 aio_readlink aio_fsync aio_fdatasync aio_readahead aio_rename aio_link
200 aio_move aio_copy aio_group aio_nop aio_mknod aio_load aio_rmtree aio_mkdir
198 aio_copy aio_group aio_nop aio_mknod); 201 aio_chown aio_chmod aio_utime);
199 our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice)); 202 our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice aio_block));
200 our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush 203 our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush
201 min_parallel max_parallel max_idle 204 min_parallel max_parallel max_idle
202 nreqs nready npending nthreads 205 nreqs nready npending nthreads
203 max_poll_time max_poll_reqs); 206 max_poll_time max_poll_reqs);
204 207
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269 aio_read $_[0], ..., sub { 272 aio_read $_[0], ..., sub {
270 ... 273 ...
271 }; 274 };
272 }; 275 };
273 276
277
274=item aioreq_nice $pri_adjust 278=item aioreq_nice $pri_adjust
275 279
276Similar to C<aioreq_pri>, but subtracts the given value from the current 280Similar to C<aioreq_pri>, but subtracts the given value from the current
277priority, so the effect is cumulative. 281priority, so the effect is cumulative.
282
278 283
279=item aio_open $pathname, $flags, $mode, $callback->($fh) 284=item aio_open $pathname, $flags, $mode, $callback->($fh)
280 285
281Asynchronously open or create a file and call the callback with a newly 286Asynchronously open or create a file and call the callback with a newly
282created filehandle for the file. 287created filehandle for the file.
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288list. They are the same as used by C<sysopen>. 293list. They are the same as used by C<sysopen>.
289 294
290Likewise, C<$mode> specifies the mode of the newly created file, if it 295Likewise, C<$mode> specifies the mode of the newly created file, if it
291didn't exist and C<O_CREAT> has been given, just like perl's C<sysopen>, 296didn't exist and C<O_CREAT> has been given, just like perl's C<sysopen>,
292except that it is mandatory (i.e. use C<0> if you don't create new files, 297except that it is mandatory (i.e. use C<0> if you don't create new files,
293and C<0666> or C<0777> if you do). 298and C<0666> or C<0777> if you do). Note that the C<$mode> will be modified
299by the umask in effect then the request is being executed, so better never
300change the umask.
294 301
295Example: 302Example:
296 303
297 aio_open "/etc/passwd", O_RDONLY, 0, sub { 304 aio_open "/etc/passwd", O_RDONLY, 0, sub {
298 if ($_[0]) { 305 if ($_[0]) {
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301 } else { 308 } else {
302 die "open failed: $!\n"; 309 die "open failed: $!\n";
303 } 310 }
304 }; 311 };
305 312
313
306=item aio_close $fh, $callback->($status) 314=item aio_close $fh, $callback->($status)
307 315
308Asynchronously close a file and call the callback with the result 316Asynchronously close a file and call the callback with the result
309code. I<WARNING:> although accepted, you should not pass in a perl 317code. I<WARNING:> although accepted, you should not pass in a perl
310filehandle here, as perl will likely close the file descriptor another 318filehandle here, as perl will likely close the file descriptor another
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312C<close> or just let filehandles go out of scope. 320C<close> or just let filehandles go out of scope.
313 321
314This is supposed to be a bug in the API, so that might change. It's 322This is supposed to be a bug in the API, so that might change. It's
315therefore best to avoid this function. 323therefore best to avoid this function.
316 324
325
317=item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) 326=item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
318 327
319=item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) 328=item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
320 329
321Reads or writes C<length> bytes from the specified C<fh> and C<offset> 330Reads or writes C<length> bytes from the specified C<fh> and C<offset>
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332 341
333 aio_read $fh, 7, 15, $buffer, 0, sub { 342 aio_read $fh, 7, 15, $buffer, 0, sub {
334 $_[0] > 0 or die "read error: $!"; 343 $_[0] > 0 or die "read error: $!";
335 print "read $_[0] bytes: <$buffer>\n"; 344 print "read $_[0] bytes: <$buffer>\n";
336 }; 345 };
346
337 347
338=item aio_sendfile $out_fh, $in_fh, $in_offset, $length, $callback->($retval) 348=item aio_sendfile $out_fh, $in_fh, $in_offset, $length, $callback->($retval)
339 349
340Tries to copy C<$length> bytes from C<$in_fh> to C<$out_fh>. It starts 350Tries to copy C<$length> bytes from C<$in_fh> to C<$out_fh>. It starts
341reading at byte offset C<$in_offset>, and starts writing at the current 351reading at byte offset C<$in_offset>, and starts writing at the current
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355C<$in_fh> than are written, and there is no way to find out how many 365C<$in_fh> than are written, and there is no way to find out how many
356bytes have been read from C<aio_sendfile> alone, as C<aio_sendfile> only 366bytes have been read from C<aio_sendfile> alone, as C<aio_sendfile> only
357provides the number of bytes written to C<$out_fh>. Only if the result 367provides the number of bytes written to C<$out_fh>. Only if the result
358value equals C<$length> one can assume that C<$length> bytes have been 368value equals C<$length> one can assume that C<$length> bytes have been
359read. 369read.
370
360 371
361=item aio_readahead $fh,$offset,$length, $callback->($retval) 372=item aio_readahead $fh,$offset,$length, $callback->($retval)
362 373
363C<aio_readahead> populates the page cache with data from a file so that 374C<aio_readahead> populates the page cache with data from a file so that
364subsequent reads from that file will not block on disk I/O. The C<$offset> 375subsequent reads from that file will not block on disk I/O. The C<$offset>
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370file. The current file offset of the file is left unchanged. 381file. The current file offset of the file is left unchanged.
371 382
372If that syscall doesn't exist (likely if your OS isn't Linux) it will be 383If that syscall doesn't exist (likely if your OS isn't Linux) it will be
373emulated by simply reading the data, which would have a similar effect. 384emulated by simply reading the data, which would have a similar effect.
374 385
386
375=item aio_stat $fh_or_path, $callback->($status) 387=item aio_stat $fh_or_path, $callback->($status)
376 388
377=item aio_lstat $fh, $callback->($status) 389=item aio_lstat $fh, $callback->($status)
378 390
379Works like perl's C<stat> or C<lstat> in void context. The callback will 391Works like perl's C<stat> or C<lstat> in void context. The callback will
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392 aio_stat "/etc/passwd", sub { 404 aio_stat "/etc/passwd", sub {
393 $_[0] and die "stat failed: $!"; 405 $_[0] and die "stat failed: $!";
394 print "size is ", -s _, "\n"; 406 print "size is ", -s _, "\n";
395 }; 407 };
396 408
409
410=item aio_utime $fh_or_path, $atime, $mtime, $callback->($status)
411
412Works like perl's C<utime> function (including the special case of $atime
413and $mtime being undef). Fractional times are supported if the underlying
414syscalls support them.
415
416When called with a pathname, uses utimes(2) if available, otherwise
417utime(2). If called on a file descriptor, uses futimes(2) if available,
418otherwise returns ENOSYS, so this is not portable.
419
420Examples:
421
422 # set atime and mtime to current time (basically touch(1)):
423 aio_utime "path", undef, undef;
424 # set atime to current time and mtime to beginning of the epoch:
425 aio_utime "path", time, undef; # undef==0
426
427
428=item aio_chown $fh_or_path, $uid, $gid, $callback->($status)
429
430Works like perl's C<chown> function, except that C<undef> for either $uid
431or $gid is being interpreted as "do not change" (but -1 can also be used).
432
433Examples:
434
435 # same as "chown root path" in the shell:
436 aio_chown "path", 0, -1;
437 # same as above:
438 aio_chown "path", 0, undef;
439
440
441=item aio_chmod $fh_or_path, $mode, $callback->($status)
442
443Works like perl's C<chmod> function.
444
445
397=item aio_unlink $pathname, $callback->($status) 446=item aio_unlink $pathname, $callback->($status)
398 447
399Asynchronously unlink (delete) a file and call the callback with the 448Asynchronously unlink (delete) a file and call the callback with the
400result code. 449result code.
401 450
451
402=item aio_mknod $path, $mode, $dev, $callback->($status) 452=item aio_mknod $path, $mode, $dev, $callback->($status)
403 453
404[EXPERIMENTAL] 454[EXPERIMENTAL]
405 455
406Asynchronously create a device node (or fifo). See mknod(2). 456Asynchronously create a device node (or fifo). See mknod(2).
407 457
408The only (POSIX-) portable way of calling this function is: 458The only (POSIX-) portable way of calling this function is:
409 459
410 aio_mknod $path, IO::AIO::S_IFIFO | $mode, 0, sub { ... 460 aio_mknod $path, IO::AIO::S_IFIFO | $mode, 0, sub { ...
461
411 462
412=item aio_link $srcpath, $dstpath, $callback->($status) 463=item aio_link $srcpath, $dstpath, $callback->($status)
413 464
414Asynchronously create a new link to the existing object at C<$srcpath> at 465Asynchronously create a new link to the existing object at C<$srcpath> at
415the path C<$dstpath> and call the callback with the result code. 466the path C<$dstpath> and call the callback with the result code.
416 467
468
417=item aio_symlink $srcpath, $dstpath, $callback->($status) 469=item aio_symlink $srcpath, $dstpath, $callback->($status)
418 470
419Asynchronously create a new symbolic link to the existing object at C<$srcpath> at 471Asynchronously create a new symbolic link to the existing object at C<$srcpath> at
420the path C<$dstpath> and call the callback with the result code. 472the path C<$dstpath> and call the callback with the result code.
421 473
474
475=item aio_readlink $path, $callback->($link)
476
477Asynchronously read the symlink specified by C<$path> and pass it to
478the callback. If an error occurs, nothing or undef gets passed to the
479callback.
480
481
422=item aio_rename $srcpath, $dstpath, $callback->($status) 482=item aio_rename $srcpath, $dstpath, $callback->($status)
423 483
424Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as 484Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as
425rename(2) and call the callback with the result code. 485rename(2) and call the callback with the result code.
426 486
487
488=item aio_mkdir $pathname, $mode, $callback->($status)
489
490Asynchronously mkdir (create) a directory and call the callback with
491the result code. C<$mode> will be modified by the umask at the time the
492request is executed, so do not change your umask.
493
494
427=item aio_rmdir $pathname, $callback->($status) 495=item aio_rmdir $pathname, $callback->($status)
428 496
429Asynchronously rmdir (delete) a directory and call the callback with the 497Asynchronously rmdir (delete) a directory and call the callback with the
430result code. 498result code.
499
431 500
432=item aio_readdir $pathname, $callback->($entries) 501=item aio_readdir $pathname, $callback->($entries)
433 502
434Unlike the POSIX call of the same name, C<aio_readdir> reads an entire 503Unlike the POSIX call of the same name, C<aio_readdir> reads an entire
435directory (i.e. opendir + readdir + closedir). The entries will not be 504directory (i.e. opendir + readdir + closedir). The entries will not be
436sorted, and will B<NOT> include the C<.> and C<..> entries. 505sorted, and will B<NOT> include the C<.> and C<..> entries.
437 506
438The callback a single argument which is either C<undef> or an array-ref 507The callback a single argument which is either C<undef> or an array-ref
439with the filenames. 508with the filenames.
509
510
511=item aio_load $path, $data, $callback->($status)
512
513This is a composite request that tries to fully load the given file into
514memory. Status is the same as with aio_read.
515
516=cut
517
518sub aio_load($$;$) {
519 aio_block {
520 my ($path, undef, $cb) = @_;
521 my $data = \$_[1];
522
523 my $pri = aioreq_pri;
524 my $grp = aio_group $cb;
525
526 aioreq_pri $pri;
527 add $grp aio_open $path, O_RDONLY, 0, sub {
528 my $fh = shift
529 or return $grp->result (-1);
530
531 aioreq_pri $pri;
532 add $grp aio_read $fh, 0, (-s $fh), $$data, 0, sub {
533 $grp->result ($_[0]);
534 };
535 };
536
537 $grp
538 }
539}
440 540
441=item aio_copy $srcpath, $dstpath, $callback->($status) 541=item aio_copy $srcpath, $dstpath, $callback->($status)
442 542
443Try to copy the I<file> (directories not supported as either source or 543Try to copy the I<file> (directories not supported as either source or
444destination) from C<$srcpath> to C<$dstpath> and call the callback with 544destination) from C<$srcpath> to C<$dstpath> and call the callback with
… …
454errors are being ignored. 554errors are being ignored.
455 555
456=cut 556=cut
457 557
458sub aio_copy($$;$) { 558sub aio_copy($$;$) {
559 aio_block {
459 my ($src, $dst, $cb) = @_; 560 my ($src, $dst, $cb) = @_;
460 561
461 my $pri = aioreq_pri; 562 my $pri = aioreq_pri;
462 my $grp = aio_group $cb; 563 my $grp = aio_group $cb;
463 564
464 aioreq_pri $pri; 565 aioreq_pri $pri;
465 add $grp aio_open $src, O_RDONLY, 0, sub { 566 add $grp aio_open $src, O_RDONLY, 0, sub {
466 if (my $src_fh = $_[0]) { 567 if (my $src_fh = $_[0]) {
467 my @stat = stat $src_fh; 568 my @stat = stat $src_fh;
468 569
469 aioreq_pri $pri; 570 aioreq_pri $pri;
470 add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub { 571 add $grp aio_open $dst, O_CREAT | O_WRONLY | O_TRUNC, 0200, sub {
471 if (my $dst_fh = $_[0]) { 572 if (my $dst_fh = $_[0]) {
472 aioreq_pri $pri; 573 aioreq_pri $pri;
473 add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { 574 add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub {
474 if ($_[0] == $stat[7]) { 575 if ($_[0] == $stat[7]) {
475 $grp->result (0); 576 $grp->result (0);
476 close $src_fh; 577 close $src_fh;
477 578
478 # those should not normally block. should. should. 579 # those should not normally block. should. should.
479 utime $stat[8], $stat[9], $dst; 580 utime $stat[8], $stat[9], $dst;
480 chmod $stat[2] & 07777, $dst_fh; 581 chmod $stat[2] & 07777, $dst_fh;
481 chown $stat[4], $stat[5], $dst_fh; 582 chown $stat[4], $stat[5], $dst_fh;
482 close $dst_fh; 583 close $dst_fh;
483 } else { 584 } else {
484 $grp->result (-1); 585 $grp->result (-1);
485 close $src_fh; 586 close $src_fh;
486 close $dst_fh; 587 close $dst_fh;
487 588
488 aioreq $pri; 589 aioreq $pri;
489 add $grp aio_unlink $dst; 590 add $grp aio_unlink $dst;
591 }
490 } 592 };
593 } else {
594 $grp->result (-1);
491 }; 595 }
492 } else {
493 $grp->result (-1);
494 } 596 },
597
598 } else {
599 $grp->result (-1);
495 }, 600 }
496
497 } else {
498 $grp->result (-1);
499 } 601 };
602
603 $grp
500 }; 604 }
501
502 $grp
503} 605}
504 606
505=item aio_move $srcpath, $dstpath, $callback->($status) 607=item aio_move $srcpath, $dstpath, $callback->($status)
506 608
507Try to move the I<file> (directories not supported as either source or 609Try to move the I<file> (directories not supported as either source or
… …
513that is successful, unlinking the C<$srcpath>. 615that is successful, unlinking the C<$srcpath>.
514 616
515=cut 617=cut
516 618
517sub aio_move($$;$) { 619sub aio_move($$;$) {
620 aio_block {
518 my ($src, $dst, $cb) = @_; 621 my ($src, $dst, $cb) = @_;
519 622
520 my $pri = aioreq_pri; 623 my $pri = aioreq_pri;
521 my $grp = aio_group $cb; 624 my $grp = aio_group $cb;
522 625
523 aioreq_pri $pri; 626 aioreq_pri $pri;
524 add $grp aio_rename $src, $dst, sub { 627 add $grp aio_rename $src, $dst, sub {
525 if ($_[0] && $! == EXDEV) { 628 if ($_[0] && $! == EXDEV) {
526 aioreq_pri $pri; 629 aioreq_pri $pri;
527 add $grp aio_copy $src, $dst, sub { 630 add $grp aio_copy $src, $dst, sub {
631 $grp->result ($_[0]);
632
633 if (!$_[0]) {
634 aioreq_pri $pri;
635 add $grp aio_unlink $src;
636 }
637 };
638 } else {
528 $grp->result ($_[0]); 639 $grp->result ($_[0]);
529
530 if (!$_[0]) {
531 aioreq_pri $pri;
532 add $grp aio_unlink $src;
533 }
534 }; 640 }
535 } else {
536 $grp->result ($_[0]);
537 } 641 };
642
643 $grp
538 }; 644 }
539
540 $grp
541} 645}
542 646
543=item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) 647=item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs)
544 648
545Scans a directory (similar to C<aio_readdir>) but additionally tries to 649Scans a directory (similar to C<aio_readdir>) but additionally tries to
… …
592as those tend to return 0 or 1 as link counts, which disables the 696as those tend to return 0 or 1 as link counts, which disables the
593directory counting heuristic. 697directory counting heuristic.
594 698
595=cut 699=cut
596 700
597sub aio_scandir($$$) { 701sub aio_scandir($$;$) {
702 aio_block {
598 my ($path, $maxreq, $cb) = @_; 703 my ($path, $maxreq, $cb) = @_;
599 704
600 my $pri = aioreq_pri; 705 my $pri = aioreq_pri;
601 706
602 my $grp = aio_group $cb; 707 my $grp = aio_group $cb;
603 708
604 $maxreq = 4 if $maxreq <= 0; 709 $maxreq = 4 if $maxreq <= 0;
605 710
606 # stat once 711 # stat once
607 aioreq_pri $pri;
608 add $grp aio_stat $path, sub {
609 return $grp->result () if $_[0];
610 my $now = time;
611 my $hash1 = join ":", (stat _)[0,1,3,7,9];
612
613 # read the directory entries
614 aioreq_pri $pri; 712 aioreq_pri $pri;
615 add $grp aio_readdir $path, sub { 713 add $grp aio_stat $path, sub {
616 my $entries = shift
617 or return $grp->result (); 714 return $grp->result () if $_[0];
715 my $now = time;
716 my $hash1 = join ":", (stat _)[0,1,3,7,9];
618 717
619 # stat the dir another time 718 # read the directory entries
620 aioreq_pri $pri; 719 aioreq_pri $pri;
720 add $grp aio_readdir $path, sub {
721 my $entries = shift
722 or return $grp->result ();
723
724 # stat the dir another time
725 aioreq_pri $pri;
621 add $grp aio_stat $path, sub { 726 add $grp aio_stat $path, sub {
622 my $hash2 = join ":", (stat _)[0,1,3,7,9]; 727 my $hash2 = join ":", (stat _)[0,1,3,7,9];
623 728
624 my $ndirs; 729 my $ndirs;
625 730
626 # take the slow route if anything looks fishy 731 # take the slow route if anything looks fishy
627 if ($hash1 ne $hash2 or (stat _)[9] == $now) { 732 if ($hash1 ne $hash2 or (stat _)[9] == $now) {
628 $ndirs = -1; 733 $ndirs = -1;
629 } else { 734 } else {
630 # if nlink == 2, we are finished 735 # if nlink == 2, we are finished
631 # on non-posix-fs's, we rely on nlink < 2 736 # on non-posix-fs's, we rely on nlink < 2
632 $ndirs = (stat _)[3] - 2 737 $ndirs = (stat _)[3] - 2
633 or return $grp->result ([], $entries); 738 or return $grp->result ([], $entries);
634 } 739 }
635 740
636 # sort into likely dirs and likely nondirs 741 # sort into likely dirs and likely nondirs
637 # dirs == files without ".", short entries first 742 # dirs == files without ".", short entries first
638 $entries = [map $_->[0], 743 $entries = [map $_->[0],
639 sort { $b->[1] cmp $a->[1] } 744 sort { $b->[1] cmp $a->[1] }
640 map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], 745 map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length],
641 @$entries]; 746 @$entries];
642 747
643 my (@dirs, @nondirs); 748 my (@dirs, @nondirs);
644 749
645 my $statgrp = add $grp aio_group sub { 750 my $statgrp = add $grp aio_group sub {
646 $grp->result (\@dirs, \@nondirs); 751 $grp->result (\@dirs, \@nondirs);
647 }; 752 };
648 753
649 limit $statgrp $maxreq; 754 limit $statgrp $maxreq;
650 feed $statgrp sub { 755 feed $statgrp sub {
651 return unless @$entries; 756 return unless @$entries;
652 my $entry = pop @$entries; 757 my $entry = pop @$entries;
653 758
654 aioreq_pri $pri; 759 aioreq_pri $pri;
655 add $statgrp aio_stat "$path/$entry/.", sub { 760 add $statgrp aio_stat "$path/$entry/.", sub {
656 if ($_[0] < 0) { 761 if ($_[0] < 0) {
657 push @nondirs, $entry; 762 push @nondirs, $entry;
658 } else { 763 } else {
659 # need to check for real directory 764 # need to check for real directory
660 aioreq_pri $pri; 765 aioreq_pri $pri;
661 add $statgrp aio_lstat "$path/$entry", sub { 766 add $statgrp aio_lstat "$path/$entry", sub {
662 if (-d _) { 767 if (-d _) {
663 push @dirs, $entry; 768 push @dirs, $entry;
664 769
665 unless (--$ndirs) { 770 unless (--$ndirs) {
666 push @nondirs, @$entries; 771 push @nondirs, @$entries;
667 feed $statgrp; 772 feed $statgrp;
773 }
774 } else {
775 push @nondirs, $entry;
668 } 776 }
669 } else {
670 push @nondirs, $entry;
671 } 777 }
672 } 778 }
673 } 779 };
674 }; 780 };
675 }; 781 };
676 }; 782 };
677 }; 783 };
784
785 $grp
678 }; 786 }
787}
679 788
789=item aio_rmtree $path, $callback->($status)
790
791Delete a directory tree starting (and including) C<$path>, return the
792status of the final C<rmdir> only. This is a composite request that
793uses C<aio_scandir> to recurse into and rmdir directories, and unlink
794everything else.
795
796=cut
797
798sub aio_rmtree;
799sub aio_rmtree($;$) {
800 aio_block {
801 my ($path, $cb) = @_;
802
803 my $pri = aioreq_pri;
804 my $grp = aio_group $cb;
805
806 aioreq_pri $pri;
807 add $grp aio_scandir $path, 0, sub {
808 my ($dirs, $nondirs) = @_;
809
810 my $dirgrp = aio_group sub {
811 add $grp aio_rmdir $path, sub {
812 $grp->result ($_[0]);
813 };
814 };
815
816 (aioreq_pri $pri), add $dirgrp aio_rmtree "$path/$_" for @$dirs;
817 (aioreq_pri $pri), add $dirgrp aio_unlink "$path/$_" for @$nondirs;
818
819 add $grp $dirgrp;
820 };
821
680 $grp 822 $grp
823 }
681} 824}
682 825
683=item aio_fsync $fh, $callback->($status) 826=item aio_fsync $fh, $callback->($status)
684 827
685Asynchronously call fsync on the given filehandle and call the callback 828Asynchronously call fsync on the given filehandle and call the callback
… …
964 poll => 'r', nice => 1, 1107 poll => 'r', nice => 1,
965 cb => &IO::AIO::poll_cb); 1108 cb => &IO::AIO::poll_cb);
966 1109
967=item IO::AIO::poll_wait 1110=item IO::AIO::poll_wait
968 1111
1112If there are any outstanding requests and none of them in the result
969Wait till the result filehandle becomes ready for reading (simply does a 1113phase, wait till the result filehandle becomes ready for reading (simply
970C<select> on the filehandle. This is useful if you want to synchronously 1114does a C<select> on the filehandle. This is useful if you want to
971wait for some requests to finish). 1115synchronously wait for some requests to finish).
972 1116
973See C<nreqs> for an example. 1117See C<nreqs> for an example.
974 1118
975=item IO::AIO::poll 1119=item IO::AIO::poll
976 1120
977Waits until some requests have been handled. 1121Waits until some requests have been handled.
978 1122
1123Returns the number of requests processed, but is otherwise strictly
979Strictly equivalent to: 1124equivalent to:
980 1125
981 IO::AIO::poll_wait, IO::AIO::poll_cb 1126 IO::AIO::poll_wait, IO::AIO::poll_cb
982 if IO::AIO::nreqs;
983 1127
984=item IO::AIO::flush 1128=item IO::AIO::flush
985 1129
986Wait till all outstanding AIO requests have been handled. 1130Wait till all outstanding AIO requests have been handled.
987 1131
988Strictly equivalent to: 1132Strictly equivalent to:
989 1133
990 IO::AIO::poll_wait, IO::AIO::poll_cb 1134 IO::AIO::poll_wait, IO::AIO::poll_cb
991 while IO::AIO::nreqs; 1135 while IO::AIO::nreqs;
992 1136
1137=back
1138
993=head3 CONTROLLING THE NUMBER OF THREADS 1139=head3 CONTROLLING THE NUMBER OF THREADS
1140
1141=over
994 1142
995=item IO::AIO::min_parallel $nthreads 1143=item IO::AIO::min_parallel $nthreads
996 1144
997Set the minimum number of AIO threads to C<$nthreads>. The current 1145Set the minimum number of AIO threads to C<$nthreads>. The current
998default is C<8>, which means eight asynchronous operations can execute 1146default is C<8>, which means eight asynchronous operations can execute
… …
1057 1205
1058You can still queue as many requests as you want. Therefore, 1206You can still queue as many requests as you want. Therefore,
1059C<max_oustsanding> is mainly useful in simple scripts (with low values) or 1207C<max_oustsanding> is mainly useful in simple scripts (with low values) or
1060as a stop gap to shield against fatal memory overflow (with large values). 1208as a stop gap to shield against fatal memory overflow (with large values).
1061 1209
1210=back
1211
1062=head3 STATISTICAL INFORMATION 1212=head3 STATISTICAL INFORMATION
1213
1214=over
1063 1215
1064=item IO::AIO::nreqs 1216=item IO::AIO::nreqs
1065 1217
1066Returns the number of requests currently in the ready, execute or pending 1218Returns the number of requests currently in the ready, execute or pending
1067states (i.e. for which their callback has not been invoked yet). 1219states (i.e. for which their callback has not been invoked yet).
… …
1101 *$sym 1253 *$sym
1102} 1254}
1103 1255
1104min_parallel 8; 1256min_parallel 8;
1105 1257
1106END { 1258END { flush }
1107 min_parallel 1;
1108 flush;
1109};
1110 1259
11111; 12601;
1112 1261
1113=head2 FORK BEHAVIOUR 1262=head2 FORK BEHAVIOUR
1114 1263

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