… | |
… | |
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 = '4.15'; |
173 | our $VERSION = '4.19'; |
174 | |
174 | |
175 | our @AIO_REQ = qw(aio_sendfile aio_seek aio_read aio_write aio_open aio_close |
175 | our @AIO_REQ = qw(aio_sendfile aio_seek 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_realpath aio_sync |
177 | aio_scandir aio_symlink aio_readlink aio_realpath aio_sync |
178 | aio_fsync aio_syncfs aio_fdatasync aio_sync_file_range aio_fallocate |
178 | aio_fsync aio_syncfs aio_fdatasync aio_sync_file_range aio_allocate |
179 | aio_pathsync aio_readahead aio_fiemap |
179 | aio_pathsync aio_readahead aio_fiemap |
180 | aio_rename aio_link aio_move aio_copy aio_group |
180 | aio_rename aio_link aio_move aio_copy aio_group |
181 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
181 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
182 | aio_chmod aio_utime aio_truncate |
182 | aio_chmod aio_utime aio_truncate |
183 | aio_msync aio_mtouch aio_mlock aio_mlockall |
183 | aio_msync aio_mtouch aio_mlock aio_mlockall |
… | |
… | |
202 | |
202 | |
203 | =head1 FUNCTIONS |
203 | =head1 FUNCTIONS |
204 | |
204 | |
205 | =head2 QUICK OVERVIEW |
205 | =head2 QUICK OVERVIEW |
206 | |
206 | |
207 | This section simply lists the prototypes of the most important functions |
207 | This section simply lists the prototypes most of the functions for |
208 | for quick reference. See the following sections for function-by-function |
208 | quick reference. See the following sections for function-by-function |
209 | documentation. |
209 | documentation. |
210 | |
210 | |
211 | aio_wd $pathname, $callback->($wd) |
211 | aio_wd $pathname, $callback->($wd) |
212 | aio_open $pathname, $flags, $mode, $callback->($fh) |
212 | aio_open $pathname, $flags, $mode, $callback->($fh) |
213 | aio_close $fh, $callback->($status) |
213 | aio_close $fh, $callback->($status) |
… | |
… | |
221 | aio_statvfs $fh_or_path, $callback->($statvfs) |
221 | aio_statvfs $fh_or_path, $callback->($statvfs) |
222 | aio_utime $fh_or_path, $atime, $mtime, $callback->($status) |
222 | aio_utime $fh_or_path, $atime, $mtime, $callback->($status) |
223 | aio_chown $fh_or_path, $uid, $gid, $callback->($status) |
223 | aio_chown $fh_or_path, $uid, $gid, $callback->($status) |
224 | aio_chmod $fh_or_path, $mode, $callback->($status) |
224 | aio_chmod $fh_or_path, $mode, $callback->($status) |
225 | aio_truncate $fh_or_path, $offset, $callback->($status) |
225 | aio_truncate $fh_or_path, $offset, $callback->($status) |
|
|
226 | aio_allocate $fh, $mode, $offset, $len, $callback->($status) |
|
|
227 | aio_fiemap $fh, $start, $length, $flags, $count, $cb->(\@extents) |
226 | aio_unlink $pathname, $callback->($status) |
228 | aio_unlink $pathname, $callback->($status) |
227 | aio_mknod $pathname, $mode, $dev, $callback->($status) |
229 | aio_mknod $pathname, $mode, $dev, $callback->($status) |
228 | aio_link $srcpath, $dstpath, $callback->($status) |
230 | aio_link $srcpath, $dstpath, $callback->($status) |
229 | aio_symlink $srcpath, $dstpath, $callback->($status) |
231 | aio_symlink $srcpath, $dstpath, $callback->($status) |
230 | aio_readlink $pathname, $callback->($link) |
232 | aio_readlink $pathname, $callback->($link) |
… | |
… | |
272 | IO::AIO::nready |
274 | IO::AIO::nready |
273 | IO::AIO::npending |
275 | IO::AIO::npending |
274 | |
276 | |
275 | IO::AIO::sendfile $ofh, $ifh, $offset, $count |
277 | IO::AIO::sendfile $ofh, $ifh, $offset, $count |
276 | IO::AIO::fadvise $fh, $offset, $len, $advice |
278 | IO::AIO::fadvise $fh, $offset, $len, $advice |
|
|
279 | IO::AIO::mmap $scalar, $length, $prot, $flags[, $fh[, $offset]] |
|
|
280 | IO::AIO::munmap $scalar |
277 | IO::AIO::madvise $scalar, $offset, $length, $advice |
281 | IO::AIO::madvise $scalar, $offset, $length, $advice |
278 | IO::AIO::mprotect $scalar, $offset, $length, $protect |
282 | IO::AIO::mprotect $scalar, $offset, $length, $protect |
279 | IO::AIO::munlock $scalar, $offset = 0, $length = undef |
283 | IO::AIO::munlock $scalar, $offset = 0, $length = undef |
280 | IO::AIO::munlockall |
284 | IO::AIO::munlockall |
281 | |
285 | |
… | |
… | |
358 | |
362 | |
359 | |
363 | |
360 | =item aio_open $pathname, $flags, $mode, $callback->($fh) |
364 | =item aio_open $pathname, $flags, $mode, $callback->($fh) |
361 | |
365 | |
362 | Asynchronously open or create a file and call the callback with a newly |
366 | Asynchronously open or create a file and call the callback with a newly |
363 | created filehandle for the file. |
367 | created filehandle for the file (or C<undef> in case of an error). |
364 | |
368 | |
365 | The pathname passed to C<aio_open> must be absolute. See API NOTES, above, |
369 | The pathname passed to C<aio_open> must be absolute. See API NOTES, above, |
366 | for an explanation. |
370 | for an explanation. |
367 | |
371 | |
368 | The C<$flags> argument is a bitmask. See the C<Fcntl> module for a |
372 | The C<$flags> argument is a bitmask. See the C<Fcntl> module for a |
… | |
… | |
599 | namemax => 255, |
603 | namemax => 255, |
600 | frsize => 1024, |
604 | frsize => 1024, |
601 | fsid => 1810 |
605 | fsid => 1810 |
602 | } |
606 | } |
603 | |
607 | |
|
|
608 | Here is a (likely partial) list of fsid values used by Linux - it is safe |
|
|
609 | to hardcode these when the $^O is C<linux>: |
|
|
610 | |
|
|
611 | 0x0000adf5 adfs |
|
|
612 | 0x0000adff affs |
|
|
613 | 0x5346414f afs |
|
|
614 | 0x09041934 anon-inode filesystem |
|
|
615 | 0x00000187 autofs |
|
|
616 | 0x42465331 befs |
|
|
617 | 0x1badface bfs |
|
|
618 | 0x42494e4d binfmt_misc |
|
|
619 | 0x9123683e btrfs |
|
|
620 | 0x0027e0eb cgroupfs |
|
|
621 | 0xff534d42 cifs |
|
|
622 | 0x73757245 coda |
|
|
623 | 0x012ff7b7 coh |
|
|
624 | 0x28cd3d45 cramfs |
|
|
625 | 0x453dcd28 cramfs-wend (wrong endianness) |
|
|
626 | 0x64626720 debugfs |
|
|
627 | 0x00001373 devfs |
|
|
628 | 0x00001cd1 devpts |
|
|
629 | 0x0000f15f ecryptfs |
|
|
630 | 0x00414a53 efs |
|
|
631 | 0x0000137d ext |
|
|
632 | 0x0000ef53 ext2/ext3 |
|
|
633 | 0x0000ef51 ext2 |
|
|
634 | 0x00004006 fat |
|
|
635 | 0x65735546 fuseblk |
|
|
636 | 0x65735543 fusectl |
|
|
637 | 0x0bad1dea futexfs |
|
|
638 | 0x01161970 gfs2 |
|
|
639 | 0x47504653 gpfs |
|
|
640 | 0x00004244 hfs |
|
|
641 | 0xf995e849 hpfs |
|
|
642 | 0x958458f6 hugetlbfs |
|
|
643 | 0x2bad1dea inotifyfs |
|
|
644 | 0x00009660 isofs |
|
|
645 | 0x000072b6 jffs2 |
|
|
646 | 0x3153464a jfs |
|
|
647 | 0x6b414653 k-afs |
|
|
648 | 0x0bd00bd0 lustre |
|
|
649 | 0x0000137f minix |
|
|
650 | 0x0000138f minix 30 char names |
|
|
651 | 0x00002468 minix v2 |
|
|
652 | 0x00002478 minix v2 30 char names |
|
|
653 | 0x00004d5a minix v3 |
|
|
654 | 0x19800202 mqueue |
|
|
655 | 0x00004d44 msdos |
|
|
656 | 0x0000564c novell |
|
|
657 | 0x00006969 nfs |
|
|
658 | 0x6e667364 nfsd |
|
|
659 | 0x00003434 nilfs |
|
|
660 | 0x5346544e ntfs |
|
|
661 | 0x00009fa1 openprom |
|
|
662 | 0x7461636F ocfs2 |
|
|
663 | 0x00009fa0 proc |
|
|
664 | 0x6165676c pstorefs |
|
|
665 | 0x0000002f qnx4 |
|
|
666 | 0x858458f6 ramfs |
|
|
667 | 0x52654973 reiserfs |
|
|
668 | 0x00007275 romfs |
|
|
669 | 0x67596969 rpc_pipefs |
|
|
670 | 0x73636673 securityfs |
|
|
671 | 0xf97cff8c selinux |
|
|
672 | 0x0000517b smb |
|
|
673 | 0x534f434b sockfs |
|
|
674 | 0x73717368 squashfs |
|
|
675 | 0x62656572 sysfs |
|
|
676 | 0x012ff7b6 sysv2 |
|
|
677 | 0x012ff7b5 sysv4 |
|
|
678 | 0x01021994 tmpfs |
|
|
679 | 0x15013346 udf |
|
|
680 | 0x00011954 ufs |
|
|
681 | 0x54190100 ufs byteswapped |
|
|
682 | 0x00009fa2 usbdevfs |
|
|
683 | 0x01021997 v9fs |
|
|
684 | 0xa501fcf5 vxfs |
|
|
685 | 0xabba1974 xenfs |
|
|
686 | 0x012ff7b4 xenix |
|
|
687 | 0x58465342 xfs |
|
|
688 | 0x012fd16d xia |
604 | |
689 | |
605 | =item aio_utime $fh_or_path, $atime, $mtime, $callback->($status) |
690 | =item aio_utime $fh_or_path, $atime, $mtime, $callback->($status) |
606 | |
691 | |
607 | Works like perl's C<utime> function (including the special case of $atime |
692 | Works like perl's C<utime> function (including the special case of $atime |
608 | and $mtime being undef). Fractional times are supported if the underlying |
693 | and $mtime being undef). Fractional times are supported if the underlying |
… | |
… | |
636 | =item aio_truncate $fh_or_path, $offset, $callback->($status) |
721 | =item aio_truncate $fh_or_path, $offset, $callback->($status) |
637 | |
722 | |
638 | Works like truncate(2) or ftruncate(2). |
723 | Works like truncate(2) or ftruncate(2). |
639 | |
724 | |
640 | |
725 | |
|
|
726 | =item aio_allocate $fh, $mode, $offset, $len, $callback->($status) |
|
|
727 | |
|
|
728 | Allocates or freed disk space according to the C<$mode> argument. See the |
|
|
729 | linux C<fallocate> docuemntation for details. |
|
|
730 | |
|
|
731 | C<$mode> can currently be C<0> or C<IO::AIO::FALLOC_FL_KEEP_SIZE> |
|
|
732 | to allocate space, or C<IO::AIO::FALLOC_FL_PUNCH_HOLE | |
|
|
733 | IO::AIO::FALLOC_FL_KEEP_SIZE>, to deallocate a file range. |
|
|
734 | |
|
|
735 | The file system block size used by C<fallocate> is presumably the |
|
|
736 | C<f_bsize> returned by C<statvfs>. |
|
|
737 | |
|
|
738 | If C<fallocate> isn't available or cannot be emulated (currently no |
|
|
739 | emulation will be attempted), passes C<-1> and sets C<$!> to C<ENOSYS>. |
|
|
740 | |
|
|
741 | |
641 | =item aio_chmod $fh_or_path, $mode, $callback->($status) |
742 | =item aio_chmod $fh_or_path, $mode, $callback->($status) |
642 | |
743 | |
643 | Works like perl's C<chmod> function. |
744 | Works like perl's C<chmod> function. |
644 | |
745 | |
645 | |
746 | |
… | |
… | |
682 | |
783 | |
683 | |
784 | |
684 | =item aio_realpath $pathname, $callback->($path) |
785 | =item aio_realpath $pathname, $callback->($path) |
685 | |
786 | |
686 | Asynchronously make the path absolute and resolve any symlinks in |
787 | Asynchronously make the path absolute and resolve any symlinks in |
687 | C<$path>. The resulting path only consists of directories (Same as |
788 | C<$path>. The resulting path only consists of directories (same as |
688 | L<Cwd::realpath>). |
789 | L<Cwd::realpath>). |
689 | |
790 | |
690 | This request can be used to get the absolute path of the current working |
791 | This request can be used to get the absolute path of the current working |
691 | directory by passing it a path of F<.> (a single dot). |
792 | directory by passing it a path of F<.> (a single dot). |
692 | |
793 | |
693 | |
794 | |
694 | =item aio_rename $srcpath, $dstpath, $callback->($status) |
795 | =item aio_rename $srcpath, $dstpath, $callback->($status) |
695 | |
796 | |
696 | Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as |
797 | Asynchronously rename the object at C<$srcpath> to C<$dstpath>, just as |
697 | rename(2) and call the callback with the result code. |
798 | rename(2) and call the callback with the result code. |
|
|
799 | |
|
|
800 | On systems that support the AIO::WD working directory abstraction |
|
|
801 | natively, the case C<[$wd, "."]> as C<$srcpath> is specialcased - instead |
|
|
802 | of failing, C<rename> is called on the absolute path of C<$wd>. |
698 | |
803 | |
699 | |
804 | |
700 | =item aio_mkdir $pathname, $mode, $callback->($status) |
805 | =item aio_mkdir $pathname, $mode, $callback->($status) |
701 | |
806 | |
702 | Asynchronously mkdir (create) a directory and call the callback with |
807 | Asynchronously mkdir (create) a directory and call the callback with |
… | |
… | |
706 | |
811 | |
707 | =item aio_rmdir $pathname, $callback->($status) |
812 | =item aio_rmdir $pathname, $callback->($status) |
708 | |
813 | |
709 | Asynchronously rmdir (delete) a directory and call the callback with the |
814 | Asynchronously rmdir (delete) a directory and call the callback with the |
710 | result code. |
815 | result code. |
|
|
816 | |
|
|
817 | On systems that support the AIO::WD working directory abstraction |
|
|
818 | natively, the case C<[$wd, "."]> is specialcased - instead of failing, |
|
|
819 | C<rmdir> is called on the absolute path of C<$wd>. |
711 | |
820 | |
712 | |
821 | |
713 | =item aio_readdir $pathname, $callback->($entries) |
822 | =item aio_readdir $pathname, $callback->($entries) |
714 | |
823 | |
715 | Unlike the POSIX call of the same name, C<aio_readdir> reads an entire |
824 | Unlike the POSIX call of the same name, C<aio_readdir> reads an entire |
… | |
… | |
1080 | } |
1189 | } |
1081 | |
1190 | |
1082 | =item aio_rmtree $pathname, $callback->($status) |
1191 | =item aio_rmtree $pathname, $callback->($status) |
1083 | |
1192 | |
1084 | Delete a directory tree starting (and including) C<$path>, return the |
1193 | Delete a directory tree starting (and including) C<$path>, return the |
1085 | status of the final C<rmdir> only. This is a composite request that |
1194 | status of the final C<rmdir> only. This is a composite request that |
1086 | uses C<aio_scandir> to recurse into and rmdir directories, and unlink |
1195 | uses C<aio_scandir> to recurse into and rmdir directories, and unlink |
1087 | everything else. |
1196 | everything else. |
1088 | |
1197 | |
1089 | =cut |
1198 | =cut |
1090 | |
1199 | |
… | |
… | |
1210 | |
1319 | |
1211 | This is a rather advanced IO::AIO call, which works best on mmap(2)ed |
1320 | This is a rather advanced IO::AIO call, which works best on mmap(2)ed |
1212 | scalars. |
1321 | scalars. |
1213 | |
1322 | |
1214 | It touches (reads or writes) all memory pages in the specified |
1323 | It touches (reads or writes) all memory pages in the specified |
1215 | range inside the scalar. All caveats and parameters are the same |
1324 | range inside the scalar. All caveats and parameters are the same |
1216 | as for C<aio_msync>, above, except for flags, which must be either |
1325 | as for C<aio_msync>, above, except for flags, which must be either |
1217 | C<0> (which reads all pages and ensures they are instantiated) or |
1326 | C<0> (which reads all pages and ensures they are instantiated) or |
1218 | C<IO::AIO::MT_MODIFY>, which modifies the memory page s(by reading and |
1327 | C<IO::AIO::MT_MODIFY>, which modifies the memory pages (by reading and |
1219 | writing an octet from it, which dirties the page). |
1328 | writing an octet from it, which dirties the page). |
1220 | |
1329 | |
1221 | =item aio_mlock $scalar, $offset = 0, $length = undef, $callback->($status) |
1330 | =item aio_mlock $scalar, $offset = 0, $length = undef, $callback->($status) |
1222 | |
1331 | |
1223 | This is a rather advanced IO::AIO call, which works best on mmap(2)ed |
1332 | This is a rather advanced IO::AIO call, which works best on mmap(2)ed |
… | |
… | |
1257 | |
1366 | |
1258 | aio_mlockall IO::AIO::MCL_FUTURE; |
1367 | aio_mlockall IO::AIO::MCL_FUTURE; |
1259 | |
1368 | |
1260 | =item aio_fiemap $fh, $start, $length, $flags, $count, $cb->(\@extents) |
1369 | =item aio_fiemap $fh, $start, $length, $flags, $count, $cb->(\@extents) |
1261 | |
1370 | |
1262 | Queries the extents of the given file (by calling the Linux FIEMAP ioctl, |
1371 | Queries the extents of the given file (by calling the Linux C<FIEMAP> |
1263 | see L<http://cvs.schmorp.de/IO-AIO/doc/fiemap.txt> for details). If the |
1372 | ioctl, see L<http://cvs.schmorp.de/IO-AIO/doc/fiemap.txt> for details). If |
1264 | C<ioctl> is not available on your OS, then this rquiest will fail with |
1373 | the ioctl is not available on your OS, then this request will fail with |
1265 | C<ENOSYS>. |
1374 | C<ENOSYS>. |
1266 | |
1375 | |
1267 | C<$start> is the starting offset to query extents for, C<$length> is the |
1376 | C<$start> is the starting offset to query extents for, C<$length> is the |
1268 | size of the range to query - if it is C<undef>, then the whole file will |
1377 | size of the range to query - if it is C<undef>, then the whole file will |
1269 | be queried. |
1378 | be queried. |
… | |
… | |
1272 | C<IO::AIO::FIEMAP_FLAG_XATTR> - C<IO::AIO::FIEMAP_FLAGS_COMPAT> is also |
1381 | C<IO::AIO::FIEMAP_FLAG_XATTR> - C<IO::AIO::FIEMAP_FLAGS_COMPAT> is also |
1273 | exported), and is normally C<0> or C<IO::AIO::FIEMAP_FLAG_SYNC> to query |
1382 | exported), and is normally C<0> or C<IO::AIO::FIEMAP_FLAG_SYNC> to query |
1274 | the data portion. |
1383 | the data portion. |
1275 | |
1384 | |
1276 | C<$count> is the maximum number of extent records to return. If it is |
1385 | C<$count> is the maximum number of extent records to return. If it is |
1277 | C<undef>, then IO::AIO queries all extents of the file. As a very special |
1386 | C<undef>, then IO::AIO queries all extents of the range. As a very special |
1278 | case, if it is C<0>, then the callback receives the number of extents |
1387 | case, if it is C<0>, then the callback receives the number of extents |
1279 | instead of the extents themselves. |
1388 | instead of the extents themselves (which is unreliable, see below). |
1280 | |
1389 | |
1281 | If an error occurs, the callback receives no arguments. The special |
1390 | If an error occurs, the callback receives no arguments. The special |
1282 | C<errno> value C<IO::AIO::EBADR> is available to test for flag errors. |
1391 | C<errno> value C<IO::AIO::EBADR> is available to test for flag errors. |
1283 | |
1392 | |
1284 | Otherwise, the callback receives an array reference with extent |
1393 | Otherwise, the callback receives an array reference with extent |
… | |
… | |
1286 | following members: |
1395 | following members: |
1287 | |
1396 | |
1288 | [$logical, $physical, $length, $flags] |
1397 | [$logical, $physical, $length, $flags] |
1289 | |
1398 | |
1290 | Flags is any combination of the following flag values (typically either C<0> |
1399 | Flags is any combination of the following flag values (typically either C<0> |
1291 | or C<IO::AIO::FIEMAP_EXTENT_LAST>): |
1400 | or C<IO::AIO::FIEMAP_EXTENT_LAST> (1)): |
1292 | |
1401 | |
1293 | C<IO::AIO::FIEMAP_EXTENT_LAST>, C<IO::AIO::FIEMAP_EXTENT_UNKNOWN>, |
1402 | C<IO::AIO::FIEMAP_EXTENT_LAST>, C<IO::AIO::FIEMAP_EXTENT_UNKNOWN>, |
1294 | C<IO::AIO::FIEMAP_EXTENT_DELALLOC>, C<IO::AIO::FIEMAP_EXTENT_ENCODED>, |
1403 | C<IO::AIO::FIEMAP_EXTENT_DELALLOC>, C<IO::AIO::FIEMAP_EXTENT_ENCODED>, |
1295 | C<IO::AIO::FIEMAP_EXTENT_DATA_ENCRYPTED>, C<IO::AIO::FIEMAP_EXTENT_NOT_ALIGNED>, |
1404 | C<IO::AIO::FIEMAP_EXTENT_DATA_ENCRYPTED>, C<IO::AIO::FIEMAP_EXTENT_NOT_ALIGNED>, |
1296 | C<IO::AIO::FIEMAP_EXTENT_DATA_INLINE>, C<IO::AIO::FIEMAP_EXTENT_DATA_TAIL>, |
1405 | C<IO::AIO::FIEMAP_EXTENT_DATA_INLINE>, C<IO::AIO::FIEMAP_EXTENT_DATA_TAIL>, |
1297 | C<IO::AIO::FIEMAP_EXTENT_UNWRITTEN>, C<IO::AIO::FIEMAP_EXTENT_MERGED> or |
1406 | C<IO::AIO::FIEMAP_EXTENT_UNWRITTEN>, C<IO::AIO::FIEMAP_EXTENT_MERGED> or |
1298 | C<IO::AIO::FIEMAP_EXTENT_SHARED>. |
1407 | C<IO::AIO::FIEMAP_EXTENT_SHARED>. |
|
|
1408 | |
|
|
1409 | At the time of this writing (Linux 3.2), this requets is unreliable unless |
|
|
1410 | C<$count> is C<undef>, as the kernel has all sorts of bugs preventing |
|
|
1411 | it to return all extents of a range for files with large number of |
|
|
1412 | extents. The code works around all these issues if C<$count> is undef. |
1299 | |
1413 | |
1300 | =item aio_group $callback->(...) |
1414 | =item aio_group $callback->(...) |
1301 | |
1415 | |
1302 | This is a very special aio request: Instead of doing something, it is a |
1416 | This is a very special aio request: Instead of doing something, it is a |
1303 | container for other aio requests, which is useful if you want to bundle |
1417 | container for other aio requests, which is useful if you want to bundle |
… | |
… | |
1419 | will still point to the original directory. Most functions accepting a |
1533 | will still point to the original directory. Most functions accepting a |
1420 | pathname will use the directory fd on newer systems, and the string on |
1534 | pathname will use the directory fd on newer systems, and the string on |
1421 | older systems. Some functions (such as realpath) will always rely on the |
1535 | older systems. Some functions (such as realpath) will always rely on the |
1422 | string form of the pathname. |
1536 | string form of the pathname. |
1423 | |
1537 | |
1424 | So this fucntionality is mainly useful to get some protection against |
1538 | So this functionality is mainly useful to get some protection against |
1425 | C<chdir>, to easily get an absolute path out of a relative path for future |
1539 | C<chdir>, to easily get an absolute path out of a relative path for future |
1426 | reference, and to speed up doing many operations in the same directory |
1540 | reference, and to speed up doing many operations in the same directory |
1427 | (e.g. when stat'ing all files in a directory). |
1541 | (e.g. when stat'ing all files in a directory). |
1428 | |
1542 | |
1429 | The following functions implement this working directory abstraction: |
1543 | The following functions implement this working directory abstraction: |
… | |
… | |
1450 | =item IO::AIO::CWD |
1564 | =item IO::AIO::CWD |
1451 | |
1565 | |
1452 | This is a compiletime constant (object) that represents the process |
1566 | This is a compiletime constant (object) that represents the process |
1453 | current working directory. |
1567 | current working directory. |
1454 | |
1568 | |
1455 | Specifying this object as working directory object for a pathname is as |
1569 | Specifying this object as working directory object for a pathname is as if |
1456 | if the pathname would be specified directly, without a directory object, |
1570 | the pathname would be specified directly, without a directory object. For |
1457 | e.g., these calls are functionally identical: |
1571 | example, these calls are functionally identical: |
1458 | |
1572 | |
1459 | aio_stat "somefile", sub { ... }; |
1573 | aio_stat "somefile", sub { ... }; |
1460 | aio_stat [IO::AIO::CWD, "somefile"], sub { ... }; |
1574 | aio_stat [IO::AIO::CWD, "somefile"], sub { ... }; |
1461 | |
1575 | |
1462 | =back |
1576 | =back |
1463 | |
1577 | |
|
|
1578 | To recover the path associated with an IO::AIO::WD object, you can use |
|
|
1579 | C<aio_realpath>: |
|
|
1580 | |
|
|
1581 | aio_realpath $wd, sub { |
|
|
1582 | warn "path is $_[0]\n"; |
|
|
1583 | }; |
|
|
1584 | |
|
|
1585 | Currently, C<aio_statvfs> always, and C<aio_rename> and C<aio_rmdir> |
|
|
1586 | sometimes, fall back to using an absolue path. |
1464 | |
1587 | |
1465 | =head2 IO::AIO::REQ CLASS |
1588 | =head2 IO::AIO::REQ CLASS |
1466 | |
1589 | |
1467 | All non-aggregate C<aio_*> functions return an object of this class when |
1590 | All non-aggregate C<aio_*> functions return an object of this class when |
1468 | called in non-void context. |
1591 | called in non-void context. |
… | |
… | |
1646 | |
1769 | |
1647 | See C<poll_cb> for an example. |
1770 | See C<poll_cb> for an example. |
1648 | |
1771 | |
1649 | =item IO::AIO::poll_cb |
1772 | =item IO::AIO::poll_cb |
1650 | |
1773 | |
1651 | Process some outstanding events on the result pipe. You have to call |
1774 | Process some requests that have reached the result phase (i.e. they have |
|
|
1775 | been executed but the results are not yet reported). You have to call |
|
|
1776 | this "regularly" to finish outstanding requests. |
|
|
1777 | |
1652 | this regularly. Returns C<0> if all events could be processed (or there |
1778 | Returns C<0> if all events could be processed (or there were no |
1653 | were no events to process), or C<-1> if it returned earlier for whatever |
1779 | events to process), or C<-1> if it returned earlier for whatever |
1654 | reason. Returns immediately when no events are outstanding. The amount of |
1780 | reason. Returns immediately when no events are outstanding. The amount |
1655 | events processed depends on the settings of C<IO::AIO::max_poll_req> and |
1781 | of events processed depends on the settings of C<IO::AIO::max_poll_req>, |
1656 | C<IO::AIO::max_poll_time>. |
1782 | C<IO::AIO::max_poll_time> and C<IO::AIO::max_outstanding>. |
1657 | |
1783 | |
1658 | If not all requests were processed for whatever reason, the filehandle |
1784 | If not all requests were processed for whatever reason, the poll file |
1659 | will still be ready when C<poll_cb> returns, so normally you don't have to |
1785 | descriptor will still be ready when C<poll_cb> returns, so normally you |
1660 | do anything special to have it called later. |
1786 | don't have to do anything special to have it called later. |
1661 | |
1787 | |
1662 | Apart from calling C<IO::AIO::poll_cb> when the event filehandle becomes |
1788 | Apart from calling C<IO::AIO::poll_cb> when the event filehandle becomes |
1663 | ready, it can be beneficial to call this function from loops which submit |
1789 | ready, it can be beneficial to call this function from loops which submit |
1664 | a lot of requests, to make sure the results get processed when they become |
1790 | a lot of requests, to make sure the results get processed when they become |
1665 | available and not just when the loop is finished and the event loop takes |
1791 | available and not just when the loop is finished and the event loop takes |
… | |
… | |
1674 | poll => 'r', async => 1, |
1800 | poll => 'r', async => 1, |
1675 | cb => \&IO::AIO::poll_cb); |
1801 | cb => \&IO::AIO::poll_cb); |
1676 | |
1802 | |
1677 | =item IO::AIO::poll_wait |
1803 | =item IO::AIO::poll_wait |
1678 | |
1804 | |
1679 | If there are any outstanding requests and none of them in the result |
1805 | Wait until either at least one request is in the result phase or no |
1680 | phase, wait till the result filehandle becomes ready for reading (simply |
1806 | requests are outstanding anymore. |
1681 | does a C<select> on the filehandle. This is useful if you want to |
1807 | |
1682 | synchronously wait for some requests to finish). |
1808 | This is useful if you want to synchronously wait for some requests to |
|
|
1809 | become ready, without actually handling them. |
1683 | |
1810 | |
1684 | See C<nreqs> for an example. |
1811 | See C<nreqs> for an example. |
1685 | |
1812 | |
1686 | =item IO::AIO::poll |
1813 | =item IO::AIO::poll |
1687 | |
1814 | |
… | |
… | |
1906 | ENOSYS, otherwise the return value of C<mprotect>. |
2033 | ENOSYS, otherwise the return value of C<mprotect>. |
1907 | |
2034 | |
1908 | =item IO::AIO::mmap $scalar, $length, $prot, $flags, $fh[, $offset] |
2035 | =item IO::AIO::mmap $scalar, $length, $prot, $flags, $fh[, $offset] |
1909 | |
2036 | |
1910 | Memory-maps a file (or anonymous memory range) and attaches it to the |
2037 | Memory-maps a file (or anonymous memory range) and attaches it to the |
1911 | given C<$scalar>, which will act like a string scalar. |
2038 | given C<$scalar>, which will act like a string scalar. Returns true on |
|
|
2039 | success, and false otherwise. |
1912 | |
2040 | |
1913 | The only operations allowed on the scalar are C<substr>/C<vec> that don't |
2041 | The only operations allowed on the scalar are C<substr>/C<vec> that don't |
1914 | change the string length, and most read-only operations such as copying it |
2042 | change the string length, and most read-only operations such as copying it |
1915 | or searching it with regexes and so on. |
2043 | or searching it with regexes and so on. |
1916 | |
2044 | |
… | |
… | |
1975 | |
2103 | |
1976 | Calls the GNU/Linux C<splice(2)> syscall, if available. If C<$r_off> or |
2104 | Calls the GNU/Linux C<splice(2)> syscall, if available. If C<$r_off> or |
1977 | C<$w_off> are C<undef>, then C<NULL> is passed for these, otherwise they |
2105 | C<$w_off> are C<undef>, then C<NULL> is passed for these, otherwise they |
1978 | should be the file offset. |
2106 | should be the file offset. |
1979 | |
2107 | |
|
|
2108 | C<$r_fh> and C<$w_fh> should not refer to the same file, as splice might |
|
|
2109 | silently corrupt the data in this case. |
|
|
2110 | |
1980 | The following symbol flag values are available: C<IO::AIO::SPLICE_F_MOVE>, |
2111 | The following symbol flag values are available: C<IO::AIO::SPLICE_F_MOVE>, |
1981 | C<IO::AIO::SPLICE_F_NONBLOCK>, C<IO::AIO::SPLICE_F_MORE> and |
2112 | C<IO::AIO::SPLICE_F_NONBLOCK>, C<IO::AIO::SPLICE_F_MORE> and |
1982 | C<IO::AIO::SPLICE_F_GIFT>. |
2113 | C<IO::AIO::SPLICE_F_GIFT>. |
1983 | |
2114 | |
1984 | See the C<splice(2)> manpage for details. |
2115 | See the C<splice(2)> manpage for details. |