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3 | IO::AIO - Asynchronous Input/Output |
3 | IO::AIO - Asynchronous Input/Output |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use IO::AIO; |
7 | use IO::AIO; |
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8 | |
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9 | aio_open "/etc/passwd", O_RDONLY, 0, sub { |
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10 | my ($fh) = @_; |
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11 | ... |
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12 | }; |
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13 | |
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14 | aio_unlink "/tmp/file", sub { }; |
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15 | |
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16 | aio_read $fh, 30000, 1024, $buffer, 0, sub { |
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17 | $_[0] > 0 or die "read error: $!"; |
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18 | }; |
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19 | |
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20 | # Event |
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21 | Event->io (fd => IO::AIO::poll_fileno, |
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22 | poll => 'r', |
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23 | cb => \&IO::AIO::poll_cb); |
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24 | |
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25 | # Glib/Gtk2 |
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26 | add_watch Glib::IO IO::AIO::poll_fileno, |
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27 | \&IO::AIO::poll_cb; |
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28 | |
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29 | # Tk |
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30 | Tk::Event::IO->fileevent (IO::AIO::poll_fileno, "", |
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31 | readable => \&IO::AIO::poll_cb); |
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32 | |
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33 | # Danga::Socket |
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34 | Danga::Socket->AddOtherFds (IO::AIO::poll_fileno => |
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35 | \&IO::AIO::poll_cb); |
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36 | |
8 | |
37 | |
9 | =head1 DESCRIPTION |
38 | =head1 DESCRIPTION |
10 | |
39 | |
11 | This module implements asynchronous I/O using whatever means your |
40 | This module implements asynchronous I/O using whatever means your |
12 | operating system supports. |
41 | operating system supports. |
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30 | use base 'Exporter'; |
59 | use base 'Exporter'; |
31 | |
60 | |
32 | use Fcntl (); |
61 | use Fcntl (); |
33 | |
62 | |
34 | BEGIN { |
63 | BEGIN { |
35 | $VERSION = 0.2; |
64 | $VERSION = 0.3; |
36 | |
65 | |
37 | @EXPORT = qw(aio_read aio_write aio_open aio_close aio_stat aio_lstat aio_unlink |
66 | @EXPORT = qw(aio_read aio_write aio_open aio_close aio_stat aio_lstat aio_unlink |
38 | aio_fsync aio_fdatasync aio_readahead); |
67 | aio_fsync aio_fdatasync aio_readahead); |
39 | @EXPORT_OK = qw(poll_fileno poll_cb min_parallel max_parallel max_outstanding nreqs); |
68 | @EXPORT_OK = qw(poll_fileno poll_cb min_parallel max_parallel max_outstanding nreqs); |
40 | |
69 | |
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104 | |
133 | |
105 | Example: Read 15 bytes at offset 7 into scalar C<$buffer>, strating at |
134 | Example: Read 15 bytes at offset 7 into scalar C<$buffer>, strating at |
106 | offset C<0> within the scalar: |
135 | offset C<0> within the scalar: |
107 | |
136 | |
108 | aio_read $fh, 7, 15, $buffer, 0, sub { |
137 | aio_read $fh, 7, 15, $buffer, 0, sub { |
109 | $_[0] >= 0 or die "read error: $!"; |
138 | $_[0] > 0 or die "read error: $!"; |
110 | print "read <$buffer>\n"; |
139 | print "read $_[0] bytes: <$buffer>\n"; |
111 | }; |
140 | }; |
112 | |
141 | |
113 | =item aio_readahead $fh,$offset,$length, $callback |
142 | =item aio_readahead $fh,$offset,$length, $callback |
114 | |
143 | |
115 | Asynchronously reads the specified byte range into the page cache, using |
144 | Asynchronously reads the specified byte range into the page cache, using |