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63 | use base 'Exporter'; |
63 | use base 'Exporter'; |
64 | |
64 | |
65 | use Fcntl (); |
65 | use Fcntl (); |
66 | |
66 | |
67 | BEGIN { |
67 | BEGIN { |
68 | $VERSION = 1.1; |
68 | $VERSION = 1.2; |
69 | |
69 | |
70 | @EXPORT = qw(aio_read aio_write aio_open aio_close aio_stat aio_lstat aio_unlink |
70 | @EXPORT = qw(aio_read aio_write aio_open aio_close aio_stat aio_lstat aio_unlink |
71 | aio_fsync aio_fdatasync aio_readahead); |
71 | aio_rmdir aio_symlink aio_fsync aio_fdatasync aio_readahead); |
72 | @EXPORT_OK = qw(poll_fileno poll_cb min_parallel max_parallel max_outstanding nreqs); |
72 | @EXPORT_OK = qw(poll_fileno poll_cb min_parallel max_parallel max_outstanding nreqs); |
73 | |
73 | |
74 | require XSLoader; |
74 | require XSLoader; |
75 | XSLoader::load IO::AIO, $VERSION; |
75 | XSLoader::load IO::AIO, $VERSION; |
76 | } |
76 | } |
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88 | syscall has been executed asynchronously. |
88 | syscall has been executed asynchronously. |
89 | |
89 | |
90 | All functions expecting a filehandle keep a copy of the filehandle |
90 | All functions expecting a filehandle keep a copy of the filehandle |
91 | internally until the request has finished. |
91 | internally until the request has finished. |
92 | |
92 | |
93 | The filenames you pass to these routines I<must> be absolute. The reason |
93 | The pathnames you pass to these routines I<must> be absolute and |
94 | for this is that at the time the request is being executed, the current |
94 | encoded in byte form. The reason for the former is that at the time the |
95 | working directory could have changed. Alternatively, you can make sure |
95 | request is being executed, the current working directory could have |
96 | that you never change the current working directory. |
96 | changed. Alternatively, you can make sure that you never change the |
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97 | current working directory. |
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98 | |
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99 | To encode pathnames to byte form, either make sure you either: a) |
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100 | always pass in filenames you got from outside (command line, readdir |
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101 | etc.), b) are ASCII or ISO 8859-1, c) use the Encode module and encode |
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102 | your pathnames to the locale (or other) encoding in effect in the user |
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103 | environment, d) use Glib::filename_from_unicode on unicode filenames or e) |
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104 | use something else. |
97 | |
105 | |
98 | =over 4 |
106 | =over 4 |
99 | |
107 | |
100 | =item aio_open $pathname, $flags, $mode, $callback |
108 | =item aio_open $pathname, $flags, $mode, $callback |
101 | |
109 | |
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191 | =item aio_unlink $pathname, $callback |
199 | =item aio_unlink $pathname, $callback |
192 | |
200 | |
193 | Asynchronously unlink (delete) a file and call the callback with the |
201 | Asynchronously unlink (delete) a file and call the callback with the |
194 | result code. |
202 | result code. |
195 | |
203 | |
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204 | =item aio_rmdir $pathname, $callback |
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205 | |
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206 | Asynchronously rmdir (delete) a directory and call the callback with the |
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207 | result code. |
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208 | |
196 | =item aio_fsync $fh, $callback |
209 | =item aio_fsync $fh, $callback |
197 | |
210 | |
198 | Asynchronously call fsync on the given filehandle and call the callback |
211 | Asynchronously call fsync on the given filehandle and call the callback |
199 | with the fsync result code. |
212 | with the fsync result code. |
200 | |
213 | |
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318 | |
331 | |
319 | # try to generate nice filehandles |
332 | # try to generate nice filehandles |
320 | my $sym = "IO::AIO::fd#$_[0]"; |
333 | my $sym = "IO::AIO::fd#$_[0]"; |
321 | local *$sym; |
334 | local *$sym; |
322 | |
335 | |
323 | open *$sym, "+<&$_[0]" # usually under any unix |
336 | open *$sym, "+<&=$_[0]" # usually works under any unix |
324 | or open *$sym, "<&$_[0]" # cygwin needs this |
337 | or open *$sym, "<&=$_[0]" # cygwin needs this |
325 | or open *$sym, ">&$_[0]" # cygwin needs this |
338 | or open *$sym, ">&=$_[0]" # or this |
326 | or return undef; |
339 | or return undef; |
327 | |
340 | |
328 | *$sym |
341 | *$sym |
329 | } |
342 | } |
330 | |
343 | |
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334 | max_parallel 0; |
347 | max_parallel 0; |
335 | } |
348 | } |
336 | |
349 | |
337 | 1; |
350 | 1; |
338 | |
351 | |
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352 | =head2 FORK BEHAVIOUR |
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353 | |
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354 | Before the fork IO::AIO first handles all outstanding requests - if other |
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355 | threads add requests during this period, this time is prolonged. It then |
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356 | enters a quiescent state where no requests can be added in other threads |
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357 | and no results will be processed. After the fork the parent simply leaves |
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358 | the quiescent state and continues request processing, while the child will |
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359 | free the request and result queue and start the same number of threads as |
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360 | were in use by the parent. |
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361 | |
339 | =head1 SEE ALSO |
362 | =head1 SEE ALSO |
340 | |
363 | |
341 | L<Coro>, L<Linux::AIO>. |
364 | L<Coro>, L<Linux::AIO>. |
342 | |
365 | |
343 | =head1 AUTHOR |
366 | =head1 AUTHOR |