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168 | use common::sense; |
168 | use common::sense; |
169 | |
169 | |
170 | use base 'Exporter'; |
170 | use base 'Exporter'; |
171 | |
171 | |
172 | BEGIN { |
172 | BEGIN { |
173 | our $VERSION = '3.71'; |
173 | our $VERSION = '3.72'; |
174 | |
174 | |
175 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
175 | our @AIO_REQ = qw(aio_sendfile aio_read aio_write aio_open aio_close |
176 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
176 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
177 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
177 | aio_scandir aio_symlink aio_readlink aio_sync aio_fsync |
178 | aio_fdatasync aio_sync_file_range aio_pathsync aio_readahead |
178 | aio_fdatasync aio_sync_file_range aio_pathsync aio_readahead |
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182 | aio_msync aio_mtouch aio_mlock aio_mlockall |
182 | aio_msync aio_mtouch aio_mlock aio_mlockall |
183 | aio_statvfs); |
183 | aio_statvfs); |
184 | |
184 | |
185 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice)); |
185 | our @EXPORT = (@AIO_REQ, qw(aioreq_pri aioreq_nice)); |
186 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
186 | our @EXPORT_OK = qw(poll_fileno poll_cb poll_wait flush |
187 | min_parallel max_parallel max_idle |
187 | min_parallel max_parallel max_idle idle_timeout |
188 | nreqs nready npending nthreads |
188 | nreqs nready npending nthreads |
189 | max_poll_time max_poll_reqs |
189 | max_poll_time max_poll_reqs |
190 | sendfile fadvise madvise |
190 | sendfile fadvise madvise |
191 | mmap munmap munlock munlockall); |
191 | mmap munmap munlock munlockall); |
192 | |
192 | |
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258 | IO::AIO::max_poll_reqs $nreqs |
258 | IO::AIO::max_poll_reqs $nreqs |
259 | IO::AIO::max_poll_time $seconds |
259 | IO::AIO::max_poll_time $seconds |
260 | IO::AIO::min_parallel $nthreads |
260 | IO::AIO::min_parallel $nthreads |
261 | IO::AIO::max_parallel $nthreads |
261 | IO::AIO::max_parallel $nthreads |
262 | IO::AIO::max_idle $nthreads |
262 | IO::AIO::max_idle $nthreads |
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263 | IO::AIO::idle_timeout $seconds |
263 | IO::AIO::max_outstanding $maxreqs |
264 | IO::AIO::max_outstanding $maxreqs |
264 | IO::AIO::nreqs |
265 | IO::AIO::nreqs |
265 | IO::AIO::nready |
266 | IO::AIO::nready |
266 | IO::AIO::npending |
267 | IO::AIO::npending |
267 | |
268 | |
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483 | for an explanation. |
484 | for an explanation. |
484 | |
485 | |
485 | Currently, the stats are always 64-bit-stats, i.e. instead of returning an |
486 | Currently, the stats are always 64-bit-stats, i.e. instead of returning an |
486 | error when stat'ing a large file, the results will be silently truncated |
487 | error when stat'ing a large file, the results will be silently truncated |
487 | unless perl itself is compiled with large file support. |
488 | unless perl itself is compiled with large file support. |
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489 | |
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490 | To help interpret the mode and dev/rdev stat values, IO::AIO offers the |
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491 | following constants and functions (if not implemented, the constants will |
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492 | be C<0> and the functions will either C<croak> or fall back on traditional |
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493 | behaviour). |
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494 | |
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495 | C<S_IFMT>, C<S_IFIFO>, C<S_IFCHR>, C<S_IFBLK>, C<S_IFLNK>, C<S_IFREG>, |
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496 | C<S_IFDIR>, C<S_IFWHT>, C<S_IFSOCK>, C<IO::AIO::major $dev_t>, |
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497 | C<IO::AIO::minor $dev_t>, C<IO::AIO::makedev $major, $minor>. |
488 | |
498 | |
489 | Example: Print the length of F</etc/passwd>: |
499 | Example: Print the length of F</etc/passwd>: |
490 | |
500 | |
491 | aio_stat "/etc/passwd", sub { |
501 | aio_stat "/etc/passwd", sub { |
492 | $_[0] and die "stat failed: $!"; |
502 | $_[0] and die "stat failed: $!"; |
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594 | |
604 | |
595 | The only (POSIX-) portable way of calling this function is: |
605 | The only (POSIX-) portable way of calling this function is: |
596 | |
606 | |
597 | aio_mknod $path, IO::AIO::S_IFIFO | $mode, 0, sub { ... |
607 | aio_mknod $path, IO::AIO::S_IFIFO | $mode, 0, sub { ... |
598 | |
608 | |
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609 | See C<aio_stat> for info about some potentially helpful extra constants |
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610 | and functions. |
599 | |
611 | |
600 | =item aio_link $srcpath, $dstpath, $callback->($status) |
612 | =item aio_link $srcpath, $dstpath, $callback->($status) |
601 | |
613 | |
602 | Asynchronously create a new link to the existing object at C<$srcpath> at |
614 | Asynchronously create a new link to the existing object at C<$srcpath> at |
603 | the path C<$dstpath> and call the callback with the result code. |
615 | the path C<$dstpath> and call the callback with the result code. |
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1514 | |
1526 | |
1515 | Under normal circumstances you don't need to call this function. |
1527 | Under normal circumstances you don't need to call this function. |
1516 | |
1528 | |
1517 | =item IO::AIO::max_idle $nthreads |
1529 | =item IO::AIO::max_idle $nthreads |
1518 | |
1530 | |
1519 | Limit the number of threads (default: 4) that are allowed to idle (i.e., |
1531 | Limit the number of threads (default: 4) that are allowed to idle |
1520 | threads that did not get a request to process within 10 seconds). That |
1532 | (i.e., threads that did not get a request to process within the idle |
1521 | means if a thread becomes idle while C<$nthreads> other threads are also |
1533 | timeout (default: 10 seconds). That means if a thread becomes idle while |
1522 | idle, it will free its resources and exit. |
1534 | C<$nthreads> other threads are also idle, it will free its resources and |
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1535 | exit. |
1523 | |
1536 | |
1524 | This is useful when you allow a large number of threads (e.g. 100 or 1000) |
1537 | This is useful when you allow a large number of threads (e.g. 100 or 1000) |
1525 | to allow for extremely high load situations, but want to free resources |
1538 | to allow for extremely high load situations, but want to free resources |
1526 | under normal circumstances (1000 threads can easily consume 30MB of RAM). |
1539 | under normal circumstances (1000 threads can easily consume 30MB of RAM). |
1527 | |
1540 | |
1528 | The default is probably ok in most situations, especially if thread |
1541 | The default is probably ok in most situations, especially if thread |
1529 | creation is fast. If thread creation is very slow on your system you might |
1542 | creation is fast. If thread creation is very slow on your system you might |
1530 | want to use larger values. |
1543 | want to use larger values. |
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1544 | |
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1545 | =item IO::AIO::idle_timeout $seconds |
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1546 | |
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1547 | Sets the minimum idle timeout (default 10) after which worker threads are |
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1548 | allowed to exit. SEe C<IO::AIO::max_idle>. |
1531 | |
1549 | |
1532 | =item IO::AIO::max_outstanding $maxreqs |
1550 | =item IO::AIO::max_outstanding $maxreqs |
1533 | |
1551 | |
1534 | This is a very bad function to use in interactive programs because it |
1552 | This is a very bad function to use in interactive programs because it |
1535 | blocks, and a bad way to reduce concurrency because it is inexact: Better |
1553 | blocks, and a bad way to reduce concurrency because it is inexact: Better |