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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: $!"; |
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18 | }; |
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19 | |
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20 | # Event |
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21 | Event->io (fd => IO::AIO::poll_fileno, |
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22 | poll => 'r', |
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23 | cb => \&IO::AIO::poll_cb); |
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24 | |
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25 | # Glib/Gtk2 |
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26 | add_watch Glib::IO IO::AIO::poll_fileno, |
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27 | \&IO::AIO::poll_cb; |
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28 | |
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29 | # Tk |
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30 | Tk::Event::IO->fileevent (IO::AIO::poll_fileno, "", |
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31 | readable => \&IO::AIO::poll_cb); |
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32 | |
| 9 | =head1 DESCRIPTION |
33 | =head1 DESCRIPTION |
| 10 | |
34 | |
| 11 | This module implements asynchronous I/O using whatever means your |
35 | This module implements asynchronous I/O using whatever means your |
| 12 | operating system supports. |
36 | operating system supports. |
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| 104 | |
128 | |
| 105 | Example: Read 15 bytes at offset 7 into scalar C<$buffer>, strating at |
129 | Example: Read 15 bytes at offset 7 into scalar C<$buffer>, strating at |
| 106 | offset C<0> within the scalar: |
130 | offset C<0> within the scalar: |
| 107 | |
131 | |
| 108 | aio_read $fh, 7, 15, $buffer, 0, sub { |
132 | aio_read $fh, 7, 15, $buffer, 0, sub { |
| 109 | $_[0] >= 0 or die "read error: $!"; |
133 | $_[0] > 0 or die "read error: $!"; |
| 110 | print "read <$buffer>\n"; |
134 | print "read $_[0] bytes: <$buffer>\n"; |
| 111 | }; |
135 | }; |
| 112 | |
136 | |
| 113 | =item aio_readahead $fh,$offset,$length, $callback |
137 | =item aio_readahead $fh,$offset,$length, $callback |
| 114 | |
138 | |
| 115 | Asynchronously reads the specified byte range into the page cache, using |
139 | Asynchronously reads the specified byte range into the page cache, using |
