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Comparing IO-AIO/AIO.pm (file contents):
Revision 1.90 by root, Mon Oct 30 23:30:00 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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99 poll => 'r', 100 poll => 'r',
100 cb => \&IO::AIO::poll_cb); 101 cb => \&IO::AIO::poll_cb);
101 102
102 # queue the request to open /etc/passwd 103 # queue the request to open /etc/passwd
103 aio_open "/etc/passwd", O_RDONLY, 0, sub { 104 aio_open "/etc/passwd", O_RDONLY, 0, sub {
104 my $fh = $_[0] 105 my $fh = shift
105 or die "error while opening: $!"; 106 or die "error while opening: $!";
106 107
107 # stat'ing filehandles is generally non-blocking 108 # stat'ing filehandles is generally non-blocking
108 my $size = -s $fh; 109 my $size = -s $fh;
109 110
… …
189use strict 'vars'; 190use strict 'vars';
190 191
191use base 'Exporter'; 192use base 'Exporter';
192 193
193BEGIN { 194BEGIN {
194 our $VERSION = '2.1'; 195 our $VERSION = '2.4';
195 196
196 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
197 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
198 aio_readlink aio_fsync aio_fdatasync aio_readahead aio_rename aio_link 199 aio_readlink aio_fsync aio_fdatasync aio_readahead aio_rename aio_link
199 aio_move aio_copy aio_group aio_nop aio_mknod); 200 aio_move aio_copy aio_group aio_nop aio_mknod aio_load aio_rmtree aio_mkdir
201 aio_chown aio_chmod aio_utime);
200 our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice)); 202 our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice aio_block));
201 our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush 203 our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush
202 min_parallel max_parallel max_idle 204 min_parallel max_parallel max_idle
203 nreqs nready npending nthreads 205 nreqs nready npending nthreads
204 max_poll_time max_poll_reqs); 206 max_poll_time max_poll_reqs);
205 207
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270 aio_read $_[0], ..., sub { 272 aio_read $_[0], ..., sub {
271 ... 273 ...
272 }; 274 };
273 }; 275 };
274 276
277
275=item aioreq_nice $pri_adjust 278=item aioreq_nice $pri_adjust
276 279
277Similar 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
278priority, so the effect is cumulative. 281priority, so the effect is cumulative.
282
279 283
280=item aio_open $pathname, $flags, $mode, $callback->($fh) 284=item aio_open $pathname, $flags, $mode, $callback->($fh)
281 285
282Asynchronously 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
283created filehandle for the file. 287created filehandle for the file.
… …
289list. They are the same as used by C<sysopen>. 293list. They are the same as used by C<sysopen>.
290 294
291Likewise, 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
292didn'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>,
293except 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,
294and C<0666> or C<0777> if you do). 298and C<0666> or C<0777> if you do). Note that the C<$mode> will be modified
299by the umask in effect then the request is being executed, so better never
300change the umask.
295 301
296Example: 302Example:
297 303
298 aio_open "/etc/passwd", O_RDONLY, 0, sub { 304 aio_open "/etc/passwd", O_RDONLY, 0, sub {
299 if ($_[0]) { 305 if ($_[0]) {
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302 } else { 308 } else {
303 die "open failed: $!\n"; 309 die "open failed: $!\n";
304 } 310 }
305 }; 311 };
306 312
313
307=item aio_close $fh, $callback->($status) 314=item aio_close $fh, $callback->($status)
308 315
309Asynchronously close a file and call the callback with the result 316Asynchronously close a file and call the callback with the result
310code. I<WARNING:> although accepted, you should not pass in a perl 317code. I<WARNING:> although accepted, you should not pass in a perl
311filehandle 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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313C<close> or just let filehandles go out of scope. 320C<close> or just let filehandles go out of scope.
314 321
315This 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
316therefore best to avoid this function. 323therefore best to avoid this function.
317 324
325
318=item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval) 326=item aio_read $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
319 327
320=item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval) 328=item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
321 329
322Reads 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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333 341
334 aio_read $fh, 7, 15, $buffer, 0, sub { 342 aio_read $fh, 7, 15, $buffer, 0, sub {
335 $_[0] > 0 or die "read error: $!"; 343 $_[0] > 0 or die "read error: $!";
336 print "read $_[0] bytes: <$buffer>\n"; 344 print "read $_[0] bytes: <$buffer>\n";
337 }; 345 };
346
338 347
339=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)
340 349
341Tries 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
342reading 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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356C<$in_fh> than are written, and there is no way to find out how many 365C<$in_fh> than are written, and there is no way to find out how many
357bytes 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
358provides 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
359value 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
360read. 369read.
370
361 371
362=item aio_readahead $fh,$offset,$length, $callback->($retval) 372=item aio_readahead $fh,$offset,$length, $callback->($retval)
363 373
364C<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
365subsequent 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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371file. The current file offset of the file is left unchanged. 381file. The current file offset of the file is left unchanged.
372 382
373If 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
374emulated by simply reading the data, which would have a similar effect. 384emulated by simply reading the data, which would have a similar effect.
375 385
386
376=item aio_stat $fh_or_path, $callback->($status) 387=item aio_stat $fh_or_path, $callback->($status)
377 388
378=item aio_lstat $fh, $callback->($status) 389=item aio_lstat $fh, $callback->($status)
379 390
380Works 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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393 aio_stat "/etc/passwd", sub { 404 aio_stat "/etc/passwd", sub {
394 $_[0] and die "stat failed: $!"; 405 $_[0] and die "stat failed: $!";
395 print "size is ", -s _, "\n"; 406 print "size is ", -s _, "\n";
396 }; 407 };
397 408
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
398=item aio_unlink $pathname, $callback->($status) 446=item aio_unlink $pathname, $callback->($status)
399 447
400Asynchronously unlink (delete) a file and call the callback with the 448Asynchronously unlink (delete) a file and call the callback with the
401result code. 449result code.
402 450
451
403=item aio_mknod $path, $mode, $dev, $callback->($status) 452=item aio_mknod $path, $mode, $dev, $callback->($status)
404 453
405[EXPERIMENTAL] 454[EXPERIMENTAL]
406 455
407Asynchronously create a device node (or fifo). See mknod(2). 456Asynchronously create a device node (or fifo). See mknod(2).
408 457
409The only (POSIX-) portable way of calling this function is: 458The only (POSIX-) portable way of calling this function is:
410 459
411 aio_mknod $path, IO::AIO::S_IFIFO | $mode, 0, sub { ... 460 aio_mknod $path, IO::AIO::S_IFIFO | $mode, 0, sub { ...
461
412 462
413=item aio_link $srcpath, $dstpath, $callback->($status) 463=item aio_link $srcpath, $dstpath, $callback->($status)
414 464
415Asynchronously 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
416the path C<$dstpath> and call the callback with the result code. 466the path C<$dstpath> and call the callback with the result code.
417 467
468
418=item aio_symlink $srcpath, $dstpath, $callback->($status) 469=item aio_symlink $srcpath, $dstpath, $callback->($status)
419 470
420Asynchronously 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
421the path C<$dstpath> and call the callback with the result code. 472the path C<$dstpath> and call the callback with the result code.
473
422 474
423=item aio_readlink $path, $callback->($link) 475=item aio_readlink $path, $callback->($link)
424 476
425Asynchronously read the symlink specified by C<$path> and pass it to 477Asynchronously read the symlink specified by C<$path> and pass it to
426the callback. If an error occurs, nothing or undef gets passed to the 478the callback. If an error occurs, nothing or undef gets passed to the
427callback. 479callback.
428 480
481
429=item aio_rename $srcpath, $dstpath, $callback->($status) 482=item aio_rename $srcpath, $dstpath, $callback->($status)
430 483
431Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as 484Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as
432rename(2) and call the callback with the result code. 485rename(2) and call the callback with the result code.
433 486
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
434=item aio_rmdir $pathname, $callback->($status) 495=item aio_rmdir $pathname, $callback->($status)
435 496
436Asynchronously rmdir (delete) a directory and call the callback with the 497Asynchronously rmdir (delete) a directory and call the callback with the
437result code. 498result code.
499
438 500
439=item aio_readdir $pathname, $callback->($entries) 501=item aio_readdir $pathname, $callback->($entries)
440 502
441Unlike 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
442directory (i.e. opendir + readdir + closedir). The entries will not be 504directory (i.e. opendir + readdir + closedir). The entries will not be
443sorted, and will B<NOT> include the C<.> and C<..> entries. 505sorted, and will B<NOT> include the C<.> and C<..> entries.
444 506
445The 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
446with 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}
447 540
448=item aio_copy $srcpath, $dstpath, $callback->($status) 541=item aio_copy $srcpath, $dstpath, $callback->($status)
449 542
450Try 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
451destination) from C<$srcpath> to C<$dstpath> and call the callback with 544destination) from C<$srcpath> to C<$dstpath> and call the callback with
… …
461errors are being ignored. 554errors are being ignored.
462 555
463=cut 556=cut
464 557
465sub aio_copy($$;$) { 558sub aio_copy($$;$) {
559 aio_block {
466 my ($src, $dst, $cb) = @_; 560 my ($src, $dst, $cb) = @_;
467 561
468 my $pri = aioreq_pri; 562 my $pri = aioreq_pri;
469 my $grp = aio_group $cb; 563 my $grp = aio_group $cb;
470 564
471 aioreq_pri $pri; 565 aioreq_pri $pri;
472 add $grp aio_open $src, O_RDONLY, 0, sub { 566 add $grp aio_open $src, O_RDONLY, 0, sub {
473 if (my $src_fh = $_[0]) { 567 if (my $src_fh = $_[0]) {
474 my @stat = stat $src_fh; 568 my @stat = stat $src_fh;
475 569
476 aioreq_pri $pri; 570 aioreq_pri $pri;
477 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 {
478 if (my $dst_fh = $_[0]) { 572 if (my $dst_fh = $_[0]) {
479 aioreq_pri $pri; 573 aioreq_pri $pri;
480 add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub { 574 add $grp aio_sendfile $dst_fh, $src_fh, 0, $stat[7], sub {
481 if ($_[0] == $stat[7]) { 575 if ($_[0] == $stat[7]) {
482 $grp->result (0); 576 $grp->result (0);
483 close $src_fh; 577 close $src_fh;
484 578
485 # those should not normally block. should. should. 579 # those should not normally block. should. should.
486 utime $stat[8], $stat[9], $dst; 580 utime $stat[8], $stat[9], $dst;
487 chmod $stat[2] & 07777, $dst_fh; 581 chmod $stat[2] & 07777, $dst_fh;
488 chown $stat[4], $stat[5], $dst_fh; 582 chown $stat[4], $stat[5], $dst_fh;
489 close $dst_fh; 583 close $dst_fh;
490 } else { 584 } else {
491 $grp->result (-1); 585 $grp->result (-1);
492 close $src_fh; 586 close $src_fh;
493 close $dst_fh; 587 close $dst_fh;
494 588
495 aioreq $pri; 589 aioreq $pri;
496 add $grp aio_unlink $dst; 590 add $grp aio_unlink $dst;
591 }
497 } 592 };
593 } else {
594 $grp->result (-1);
498 }; 595 }
499 } else {
500 $grp->result (-1);
501 } 596 },
597
598 } else {
599 $grp->result (-1);
502 }, 600 }
503
504 } else {
505 $grp->result (-1);
506 } 601 };
602
603 $grp
507 }; 604 }
508
509 $grp
510} 605}
511 606
512=item aio_move $srcpath, $dstpath, $callback->($status) 607=item aio_move $srcpath, $dstpath, $callback->($status)
513 608
514Try 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
… …
520that is successful, unlinking the C<$srcpath>. 615that is successful, unlinking the C<$srcpath>.
521 616
522=cut 617=cut
523 618
524sub aio_move($$;$) { 619sub aio_move($$;$) {
620 aio_block {
525 my ($src, $dst, $cb) = @_; 621 my ($src, $dst, $cb) = @_;
526 622
527 my $pri = aioreq_pri; 623 my $pri = aioreq_pri;
528 my $grp = aio_group $cb; 624 my $grp = aio_group $cb;
529 625
530 aioreq_pri $pri; 626 aioreq_pri $pri;
531 add $grp aio_rename $src, $dst, sub { 627 add $grp aio_rename $src, $dst, sub {
532 if ($_[0] && $! == EXDEV) { 628 if ($_[0] && $! == EXDEV) {
533 aioreq_pri $pri; 629 aioreq_pri $pri;
534 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 {
535 $grp->result ($_[0]); 639 $grp->result ($_[0]);
536
537 if (!$_[0]) {
538 aioreq_pri $pri;
539 add $grp aio_unlink $src;
540 }
541 }; 640 }
542 } else {
543 $grp->result ($_[0]);
544 } 641 };
642
643 $grp
545 }; 644 }
546
547 $grp
548} 645}
549 646
550=item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs) 647=item aio_scandir $path, $maxreq, $callback->($dirs, $nondirs)
551 648
552Scans a directory (similar to C<aio_readdir>) but additionally tries to 649Scans a directory (similar to C<aio_readdir>) but additionally tries to
… …
599as 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
600directory counting heuristic. 697directory counting heuristic.
601 698
602=cut 699=cut
603 700
604sub aio_scandir($$$) { 701sub aio_scandir($$;$) {
702 aio_block {
605 my ($path, $maxreq, $cb) = @_; 703 my ($path, $maxreq, $cb) = @_;
606 704
607 my $pri = aioreq_pri; 705 my $pri = aioreq_pri;
608 706
609 my $grp = aio_group $cb; 707 my $grp = aio_group $cb;
610 708
611 $maxreq = 4 if $maxreq <= 0; 709 $maxreq = 4 if $maxreq <= 0;
612 710
613 # stat once 711 # stat once
614 aioreq_pri $pri;
615 add $grp aio_stat $path, sub {
616 return $grp->result () if $_[0];
617 my $now = time;
618 my $hash1 = join ":", (stat _)[0,1,3,7,9];
619
620 # read the directory entries
621 aioreq_pri $pri; 712 aioreq_pri $pri;
622 add $grp aio_readdir $path, sub { 713 add $grp aio_stat $path, sub {
623 my $entries = shift
624 or return $grp->result (); 714 return $grp->result () if $_[0];
715 my $now = time;
716 my $hash1 = join ":", (stat _)[0,1,3,7,9];
625 717
626 # stat the dir another time 718 # read the directory entries
627 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;
628 add $grp aio_stat $path, sub { 726 add $grp aio_stat $path, sub {
629 my $hash2 = join ":", (stat _)[0,1,3,7,9]; 727 my $hash2 = join ":", (stat _)[0,1,3,7,9];
630 728
631 my $ndirs; 729 my $ndirs;
632 730
633 # take the slow route if anything looks fishy 731 # take the slow route if anything looks fishy
634 if ($hash1 ne $hash2 or (stat _)[9] == $now) { 732 if ($hash1 ne $hash2 or (stat _)[9] == $now) {
635 $ndirs = -1; 733 $ndirs = -1;
636 } else { 734 } else {
637 # if nlink == 2, we are finished 735 # if nlink == 2, we are finished
638 # on non-posix-fs's, we rely on nlink < 2 736 # on non-posix-fs's, we rely on nlink < 2
639 $ndirs = (stat _)[3] - 2 737 $ndirs = (stat _)[3] - 2
640 or return $grp->result ([], $entries); 738 or return $grp->result ([], $entries);
641 } 739 }
642 740
643 # sort into likely dirs and likely nondirs 741 # sort into likely dirs and likely nondirs
644 # dirs == files without ".", short entries first 742 # dirs == files without ".", short entries first
645 $entries = [map $_->[0], 743 $entries = [map $_->[0],
646 sort { $b->[1] cmp $a->[1] } 744 sort { $b->[1] cmp $a->[1] }
647 map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length], 745 map [$_, sprintf "%s%04d", (/.\./ ? "1" : "0"), length],
648 @$entries]; 746 @$entries];
649 747
650 my (@dirs, @nondirs); 748 my (@dirs, @nondirs);
651 749
652 my $statgrp = add $grp aio_group sub { 750 my $statgrp = add $grp aio_group sub {
653 $grp->result (\@dirs, \@nondirs); 751 $grp->result (\@dirs, \@nondirs);
654 }; 752 };
655 753
656 limit $statgrp $maxreq; 754 limit $statgrp $maxreq;
657 feed $statgrp sub { 755 feed $statgrp sub {
658 return unless @$entries; 756 return unless @$entries;
659 my $entry = pop @$entries; 757 my $entry = pop @$entries;
660 758
661 aioreq_pri $pri; 759 aioreq_pri $pri;
662 add $statgrp aio_stat "$path/$entry/.", sub { 760 add $statgrp aio_stat "$path/$entry/.", sub {
663 if ($_[0] < 0) { 761 if ($_[0] < 0) {
664 push @nondirs, $entry; 762 push @nondirs, $entry;
665 } else { 763 } else {
666 # need to check for real directory 764 # need to check for real directory
667 aioreq_pri $pri; 765 aioreq_pri $pri;
668 add $statgrp aio_lstat "$path/$entry", sub { 766 add $statgrp aio_lstat "$path/$entry", sub {
669 if (-d _) { 767 if (-d _) {
670 push @dirs, $entry; 768 push @dirs, $entry;
671 769
672 unless (--$ndirs) { 770 unless (--$ndirs) {
673 push @nondirs, @$entries; 771 push @nondirs, @$entries;
674 feed $statgrp; 772 feed $statgrp;
773 }
774 } else {
775 push @nondirs, $entry;
675 } 776 }
676 } else {
677 push @nondirs, $entry;
678 } 777 }
679 } 778 }
680 } 779 };
681 }; 780 };
682 }; 781 };
683 }; 782 };
684 }; 783 };
784
785 $grp
685 }; 786 }
787}
686 788
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
687 $grp 822 $grp
823 }
688} 824}
689 825
690=item aio_fsync $fh, $callback->($status) 826=item aio_fsync $fh, $callback->($status)
691 827
692Asynchronously call fsync on the given filehandle and call the callback 828Asynchronously call fsync on the given filehandle and call the callback
… …
971 poll => 'r', nice => 1, 1107 poll => 'r', nice => 1,
972 cb => &IO::AIO::poll_cb); 1108 cb => &IO::AIO::poll_cb);
973 1109
974=item IO::AIO::poll_wait 1110=item IO::AIO::poll_wait
975 1111
1112If there are any outstanding requests and none of them in the result
976Wait till the result filehandle becomes ready for reading (simply does a 1113phase, wait till the result filehandle becomes ready for reading (simply
977C<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
978wait for some requests to finish). 1115synchronously wait for some requests to finish).
979 1116
980See C<nreqs> for an example. 1117See C<nreqs> for an example.
981 1118
982=item IO::AIO::poll 1119=item IO::AIO::poll
983 1120
984Waits until some requests have been handled. 1121Waits until some requests have been handled.
985 1122
1123Returns the number of requests processed, but is otherwise strictly
986Strictly equivalent to: 1124equivalent to:
987 1125
988 IO::AIO::poll_wait, IO::AIO::poll_cb 1126 IO::AIO::poll_wait, IO::AIO::poll_cb
989 if IO::AIO::nreqs;
990 1127
991=item IO::AIO::flush 1128=item IO::AIO::flush
992 1129
993Wait till all outstanding AIO requests have been handled. 1130Wait till all outstanding AIO requests have been handled.
994 1131
995Strictly equivalent to: 1132Strictly equivalent to:
996 1133
997 IO::AIO::poll_wait, IO::AIO::poll_cb 1134 IO::AIO::poll_wait, IO::AIO::poll_cb
998 while IO::AIO::nreqs; 1135 while IO::AIO::nreqs;
999 1136
1137=back
1138
1000=head3 CONTROLLING THE NUMBER OF THREADS 1139=head3 CONTROLLING THE NUMBER OF THREADS
1140
1141=over
1001 1142
1002=item IO::AIO::min_parallel $nthreads 1143=item IO::AIO::min_parallel $nthreads
1003 1144
1004Set the minimum number of AIO threads to C<$nthreads>. The current 1145Set the minimum number of AIO threads to C<$nthreads>. The current
1005default is C<8>, which means eight asynchronous operations can execute 1146default is C<8>, which means eight asynchronous operations can execute
… …
1064 1205
1065You can still queue as many requests as you want. Therefore, 1206You can still queue as many requests as you want. Therefore,
1066C<max_oustsanding> is mainly useful in simple scripts (with low values) or 1207C<max_oustsanding> is mainly useful in simple scripts (with low values) or
1067as a stop gap to shield against fatal memory overflow (with large values). 1208as a stop gap to shield against fatal memory overflow (with large values).
1068 1209
1210=back
1211
1069=head3 STATISTICAL INFORMATION 1212=head3 STATISTICAL INFORMATION
1213
1214=over
1070 1215
1071=item IO::AIO::nreqs 1216=item IO::AIO::nreqs
1072 1217
1073Returns the number of requests currently in the ready, execute or pending 1218Returns the number of requests currently in the ready, execute or pending
1074states (i.e. for which their callback has not been invoked yet). 1219states (i.e. for which their callback has not been invoked yet).
… …
1108 *$sym 1253 *$sym
1109} 1254}
1110 1255
1111min_parallel 8; 1256min_parallel 8;
1112 1257
1113END { 1258END { flush }
1114 min_parallel 1;
1115 flush;
1116};
1117 1259
11181; 12601;
1119 1261
1120=head2 FORK BEHAVIOUR 1262=head2 FORK BEHAVIOUR
1121 1263

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