… | |
… | |
171 | use common::sense; |
171 | use common::sense; |
172 | |
172 | |
173 | use base 'Exporter'; |
173 | use base 'Exporter'; |
174 | |
174 | |
175 | BEGIN { |
175 | BEGIN { |
176 | our $VERSION = 4.6; |
176 | our $VERSION = 4.73; |
177 | |
177 | |
178 | our @AIO_REQ = qw(aio_sendfile aio_seek aio_read aio_write aio_open aio_close |
178 | our @AIO_REQ = qw(aio_sendfile aio_seek aio_read aio_write aio_open aio_close |
179 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
179 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
180 | aio_scandir aio_symlink aio_readlink aio_realpath aio_fcntl aio_ioctl |
180 | aio_scandir aio_symlink aio_readlink aio_realpath aio_fcntl aio_ioctl |
181 | aio_sync aio_fsync aio_syncfs aio_fdatasync aio_sync_file_range |
181 | aio_sync aio_fsync aio_syncfs aio_fdatasync aio_sync_file_range |
… | |
… | |
278 | IO::AIO::idle_timeout $seconds |
278 | IO::AIO::idle_timeout $seconds |
279 | IO::AIO::max_outstanding $maxreqs |
279 | IO::AIO::max_outstanding $maxreqs |
280 | IO::AIO::nreqs |
280 | IO::AIO::nreqs |
281 | IO::AIO::nready |
281 | IO::AIO::nready |
282 | IO::AIO::npending |
282 | IO::AIO::npending |
|
|
283 | IO::AIO::reinit |
|
|
284 | |
283 | $nfd = IO::AIO::get_fdlimit [EXPERIMENTAL] |
285 | $nfd = IO::AIO::get_fdlimit [EXPERIMENTAL] |
284 | IO::AIO::min_fdlimit $nfd [EXPERIMENTAL] |
286 | IO::AIO::min_fdlimit $nfd [EXPERIMENTAL] |
285 | |
287 | |
286 | IO::AIO::sendfile $ofh, $ifh, $offset, $count |
288 | IO::AIO::sendfile $ofh, $ifh, $offset, $count |
287 | IO::AIO::fadvise $fh, $offset, $len, $advice |
289 | IO::AIO::fadvise $fh, $offset, $len, $advice |
|
|
290 | |
288 | IO::AIO::mmap $scalar, $length, $prot, $flags[, $fh[, $offset]] |
291 | IO::AIO::mmap $scalar, $length, $prot, $flags[, $fh[, $offset]] |
289 | IO::AIO::munmap $scalar |
292 | IO::AIO::munmap $scalar |
290 | IO::AIO::mremap $scalar, $new_length, $flags[, $new_address] |
293 | IO::AIO::mremap $scalar, $new_length, $flags[, $new_address] |
291 | IO::AIO::madvise $scalar, $offset, $length, $advice |
294 | IO::AIO::madvise $scalar, $offset, $length, $advice |
292 | IO::AIO::mprotect $scalar, $offset, $length, $protect |
295 | IO::AIO::mprotect $scalar, $offset, $length, $protect |
293 | IO::AIO::munlock $scalar, $offset = 0, $length = undef |
296 | IO::AIO::munlock $scalar, $offset = 0, $length = undef |
294 | IO::AIO::munlockall |
297 | IO::AIO::munlockall |
|
|
298 | |
|
|
299 | # stat extensions |
|
|
300 | $counter = IO::AIO::st_gen |
|
|
301 | $seconds = IO::AIO::st_atime, IO::AIO::st_mtime, IO::AIO::st_ctime, IO::AIO::st_btime |
|
|
302 | ($atime, $mtime, $ctime, $btime, ...) = IO::AIO::st_xtime |
|
|
303 | $nanoseconds = IO::AIO::st_atimensec, IO::AIO::st_mtimensec, IO::AIO::st_ctimensec, IO::AIO::st_btimensec |
|
|
304 | $seconds = IO::AIO::st_btimesec |
|
|
305 | ($atime, $mtime, $ctime, $btime, ...) = IO::AIO::st_xtimensec |
|
|
306 | |
|
|
307 | # very much unportable syscalls |
|
|
308 | IO::AIO::accept4 $r_fh, $sockaddr, $sockaddr_len, $flags |
|
|
309 | IO::AIO::splice $r_fh, $r_off, $w_fh, $w_off, $length, $flags |
|
|
310 | IO::AIO::tee $r_fh, $w_fh, $length, $flags |
|
|
311 | $actual_size = IO::AIO::pipesize $r_fh[, $new_size] |
|
|
312 | ($rfh, $wfh) = IO::AIO::pipe2 [$flags] |
|
|
313 | $fh = IO::AIO::memfd_create $pathname[, $flags] |
|
|
314 | $fh = IO::AIO::eventfd [$initval, [$flags]] |
|
|
315 | $fh = IO::AIO::timerfd_create $clockid[, $flags] |
|
|
316 | ($cur_interval, $cur_value) = IO::AIO::timerfd_settime $fh, $flags, $new_interval, $nbw_value |
|
|
317 | ($cur_interval, $cur_value) = IO::AIO::timerfd_gettime $fh |
295 | |
318 | |
296 | =head2 API NOTES |
319 | =head2 API NOTES |
297 | |
320 | |
298 | All the C<aio_*> calls are more or less thin wrappers around the syscall |
321 | All the C<aio_*> calls are more or less thin wrappers around the syscall |
299 | with the same name (sans C<aio_>). The arguments are similar or identical, |
322 | with the same name (sans C<aio_>). The arguments are similar or identical, |
… | |
… | |
1109 | aioreq_pri $pri; |
1132 | aioreq_pri $pri; |
1110 | add $grp aio_stat $wd, sub { |
1133 | add $grp aio_stat $wd, sub { |
1111 | return $grp->result () if $_[0]; |
1134 | return $grp->result () if $_[0]; |
1112 | my $now = time; |
1135 | my $now = time; |
1113 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
1136 | my $hash1 = join ":", (stat _)[0,1,3,7,9]; |
|
|
1137 | my $rdxflags = READDIR_DIRS_FIRST; |
|
|
1138 | |
|
|
1139 | if ((stat _)[3] < 2) { |
|
|
1140 | # at least one non-POSIX filesystem exists |
|
|
1141 | # that returns useful DT_type values: btrfs, |
|
|
1142 | # so optimise for this here by requesting dents |
|
|
1143 | $rdxflags |= READDIR_DENTS; |
|
|
1144 | } |
1114 | |
1145 | |
1115 | # read the directory entries |
1146 | # read the directory entries |
1116 | aioreq_pri $pri; |
1147 | aioreq_pri $pri; |
1117 | add $grp aio_readdirx $wd, READDIR_DIRS_FIRST, sub { |
1148 | add $grp aio_readdirx $wd, $rdxflags, sub { |
1118 | my $entries = shift |
1149 | my ($entries, $flags) = @_ |
1119 | or return $grp->result (); |
1150 | or return $grp->result (); |
|
|
1151 | |
|
|
1152 | if ($rdxflags & READDIR_DENTS) { |
|
|
1153 | # if we requested type values, see if we can use them directly. |
|
|
1154 | |
|
|
1155 | # if there were any DT_UNKNOWN entries then we assume we |
|
|
1156 | # don't know. alternatively, we could assume that if we get |
|
|
1157 | # one DT_DIR, then all directories are indeed marked with |
|
|
1158 | # DT_DIR, but this seems not required for btrfs, and this |
|
|
1159 | # is basically the "btrfs can't get it's act together" code |
|
|
1160 | # branch. |
|
|
1161 | unless ($flags & READDIR_FOUND_UNKNOWN) { |
|
|
1162 | # now we have valid DT_ information for all entries, |
|
|
1163 | # so use it as an optimisation without further stat's. |
|
|
1164 | # they must also all be at the beginning of @$entries |
|
|
1165 | # by now. |
|
|
1166 | |
|
|
1167 | my $dirs; |
|
|
1168 | |
|
|
1169 | if (@$entries) { |
|
|
1170 | for (0 .. $#$entries) { |
|
|
1171 | if ($entries->[$_][1] != DT_DIR) { |
|
|
1172 | # splice out directories |
|
|
1173 | $dirs = [splice @$entries, 0, $_]; |
|
|
1174 | last; |
|
|
1175 | } |
|
|
1176 | } |
|
|
1177 | |
|
|
1178 | # if we didn't find any non-dir, then all entries are dirs |
|
|
1179 | unless ($dirs) { |
|
|
1180 | ($dirs, $entries) = ($entries, []); |
|
|
1181 | } |
|
|
1182 | } else { |
|
|
1183 | # directory is empty, so there are no sbdirs |
|
|
1184 | $dirs = []; |
|
|
1185 | } |
|
|
1186 | |
|
|
1187 | # either splice'd the directories out or the dir was empty. |
|
|
1188 | # convert dents to filenames |
|
|
1189 | $_ = $_->[0] for @$dirs; |
|
|
1190 | $_ = $_->[0] for @$entries; |
|
|
1191 | |
|
|
1192 | return $grp->result ($dirs, $entries); |
|
|
1193 | } |
|
|
1194 | |
|
|
1195 | # cannot use, so return to our old ways |
|
|
1196 | # by pretending we only scanned for names. |
|
|
1197 | $_ = $_->[0] for @$entries; |
|
|
1198 | } |
1120 | |
1199 | |
1121 | # stat the dir another time |
1200 | # stat the dir another time |
1122 | aioreq_pri $pri; |
1201 | aioreq_pri $pri; |
1123 | add $grp aio_stat $wd, sub { |
1202 | add $grp aio_stat $wd, sub { |
1124 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
1203 | my $hash2 = join ":", (stat _)[0,1,3,7,9]; |
… | |
… | |
1230 | So in general, you should only use these calls for things that do |
1309 | So in general, you should only use these calls for things that do |
1231 | (filesystem) I/O, not for things that wait for other events (network, |
1310 | (filesystem) I/O, not for things that wait for other events (network, |
1232 | other processes), although if you are careful and know what you are doing, |
1311 | other processes), although if you are careful and know what you are doing, |
1233 | you still can. |
1312 | you still can. |
1234 | |
1313 | |
1235 | The following constants are available (missing ones are, as usual C<0>): |
1314 | The following constants are available and can be used for normal C<ioctl> |
|
|
1315 | and C<fcntl> as well (missing ones are, as usual C<0>): |
1236 | |
1316 | |
1237 | C<F_DUPFD_CLOEXEC>, |
1317 | C<F_DUPFD_CLOEXEC>, |
1238 | |
1318 | |
1239 | C<F_OFD_GETLK>, C<F_OFD_SETLK>, C<F_OFD_GETLKW>, |
1319 | C<F_OFD_GETLK>, C<F_OFD_SETLK>, C<F_OFD_GETLKW>, |
1240 | |
1320 | |
1241 | C<FIFREEZE>, C<FITHAW>, C<FITRIM>, C<FICLONE>, C<FICLONERANGE>, C<FIDEDUPERANGE>. |
1321 | C<FIFREEZE>, C<FITHAW>, C<FITRIM>, C<FICLONE>, C<FICLONERANGE>, C<FIDEDUPERANGE>. |
|
|
1322 | |
|
|
1323 | C<F_ADD_SEALS>, C<F_GET_SEALS>, C<F_SEAL_SEAL>, C<F_SEAL_SHRINK>, C<F_SEAL_GROW> and |
|
|
1324 | C<F_SEAL_WRITE>. |
1242 | |
1325 | |
1243 | C<FS_IOC_GETFLAGS>, C<FS_IOC_SETFLAGS>, C<FS_IOC_GETVERSION>, C<FS_IOC_SETVERSION>, |
1326 | C<FS_IOC_GETFLAGS>, C<FS_IOC_SETFLAGS>, C<FS_IOC_GETVERSION>, C<FS_IOC_SETVERSION>, |
1244 | C<FS_IOC_FIEMAP>. |
1327 | C<FS_IOC_FIEMAP>. |
1245 | |
1328 | |
1246 | C<FS_IOC_FSGETXATTR>, C<FS_IOC_FSSETXATTR>, C<FS_IOC_SET_ENCRYPTION_POLICY>, |
1329 | C<FS_IOC_FSGETXATTR>, C<FS_IOC_FSSETXATTR>, C<FS_IOC_SET_ENCRYPTION_POLICY>, |
… | |
… | |
1596 | C<aio_wd> callback, as future requests using the value will fail in the |
1679 | C<aio_wd> callback, as future requests using the value will fail in the |
1597 | expected way. |
1680 | expected way. |
1598 | |
1681 | |
1599 | =item IO::AIO::CWD |
1682 | =item IO::AIO::CWD |
1600 | |
1683 | |
1601 | This is a compiletime constant (object) that represents the process |
1684 | This is a compile time constant (object) that represents the process |
1602 | current working directory. |
1685 | current working directory. |
1603 | |
1686 | |
1604 | Specifying this object as working directory object for a pathname is as if |
1687 | Specifying this object as working directory object for a pathname is as if |
1605 | the pathname would be specified directly, without a directory object. For |
1688 | the pathname would be specified directly, without a directory object. For |
1606 | example, these calls are functionally identical: |
1689 | example, these calls are functionally identical: |
… | |
… | |
2066 | for times around now - see the I<nsec> function family, below, for full |
2149 | for times around now - see the I<nsec> function family, below, for full |
2067 | accuracy. |
2150 | accuracy. |
2068 | |
2151 | |
2069 | File birth time is only available when the OS and perl support it (on |
2152 | File birth time is only available when the OS and perl support it (on |
2070 | FreeBSD and NetBSD at the time of this writing, although support is |
2153 | FreeBSD and NetBSD at the time of this writing, although support is |
2071 | adaptive, so if your OS/perl gains support, IO::AIO can take avdantage of |
2154 | adaptive, so if your OS/perl gains support, IO::AIO can take advantage of |
2072 | it). On systems where it isn't available, C<0> is currently returned, but |
2155 | it). On systems where it isn't available, C<0> is currently returned, but |
2073 | this might change to C<undef> in a future version. |
2156 | this might change to C<undef> in a future version. |
2074 | |
2157 | |
2075 | =item ($atime, $mtime, $ctime, $btime, ...) = IO::AIO::st_xtime |
2158 | =item ($atime, $mtime, $ctime, $btime, ...) = IO::AIO::st_xtime |
2076 | |
2159 | |
… | |
… | |
2315 | Calls the C<munlockall> function. |
2398 | Calls the C<munlockall> function. |
2316 | |
2399 | |
2317 | On systems that do not implement C<munlockall>, this function returns |
2400 | On systems that do not implement C<munlockall>, this function returns |
2318 | ENOSYS, otherwise the return value of C<munlockall>. |
2401 | ENOSYS, otherwise the return value of C<munlockall>. |
2319 | |
2402 | |
|
|
2403 | =item $fh = IO::AIO::accept4 $r_fh, $sockaddr, $sockaddr_maxlen, $flags |
|
|
2404 | |
|
|
2405 | Uses the GNU/Linux C<accept4(2)> syscall, if available, to accept a socket |
|
|
2406 | and return the new file handle on success, or sets C<$!> and returns |
|
|
2407 | C<undef> on error. |
|
|
2408 | |
|
|
2409 | The remote name of the new socket will be stored in C<$sockaddr>, which |
|
|
2410 | will be extended to allow for at least C<$sockaddr_maxlen> octets. If the |
|
|
2411 | socket name does not fit into C<$sockaddr_maxlen> octets, this is signaled |
|
|
2412 | by returning a longer string in C<$sockaddr>, which might or might not be |
|
|
2413 | truncated. |
|
|
2414 | |
|
|
2415 | To accept name-less sockets, use C<undef> for C<$sockaddr> and C<0> for |
|
|
2416 | C<$sockaddr_maxlen>. |
|
|
2417 | |
|
|
2418 | The main reasons to use this syscall rather than portable C«accept(2)> |
|
|
2419 | are that you can specify C<SOCK_NONBLOCK> and/or C<SOCK_CLOEXEC> |
|
|
2420 | flags and you can accept name-less sockets by specifying C<0> for |
|
|
2421 | C<$sockaddr_maxlen>, which is sadly not possible with perl's interface to |
|
|
2422 | C<accept>. |
|
|
2423 | |
2320 | =item IO::AIO::splice $r_fh, $r_off, $w_fh, $w_off, $length, $flags |
2424 | =item IO::AIO::splice $r_fh, $r_off, $w_fh, $w_off, $length, $flags |
2321 | |
2425 | |
2322 | Calls the GNU/Linux C<splice(2)> syscall, if available. If C<$r_off> or |
2426 | Calls the GNU/Linux C<splice(2)> syscall, if available. If C<$r_off> or |
2323 | C<$w_off> are C<undef>, then C<NULL> is passed for these, otherwise they |
2427 | C<$w_off> are C<undef>, then C<NULL> is passed for these, otherwise they |
2324 | should be the file offset. |
2428 | should be the file offset. |
… | |
… | |
2367 | Example: create a pipe race-free w.r.t. threads and fork: |
2471 | Example: create a pipe race-free w.r.t. threads and fork: |
2368 | |
2472 | |
2369 | my ($rfh, $wfh) = IO::AIO::pipe2 IO::AIO::O_CLOEXEC |
2473 | my ($rfh, $wfh) = IO::AIO::pipe2 IO::AIO::O_CLOEXEC |
2370 | or die "pipe2: $!\n"; |
2474 | or die "pipe2: $!\n"; |
2371 | |
2475 | |
|
|
2476 | =item $fh = IO::AIO::memfd_create $pathname[, $flags] |
|
|
2477 | |
|
|
2478 | This is a direct interface to the Linux L<memfd_create(2)> system |
|
|
2479 | call. The (unhelpful) default for C<$flags> is C<0>, but your default |
|
|
2480 | should be C<IO::AIO::MFD_CLOEXEC>. |
|
|
2481 | |
|
|
2482 | On success, the new memfd filehandle is returned, otherwise returns |
|
|
2483 | C<undef>. If the memfd_create syscall is missing, fails with C<ENOSYS>. |
|
|
2484 | |
|
|
2485 | Please refer to L<memfd_create(2)> for more info on this call. |
|
|
2486 | |
|
|
2487 | The following C<$flags> values are available: C<IO::AIO::MFD_CLOEXEC>, |
|
|
2488 | C<IO::AIO::MFD_ALLOW_SEALING> and C<IO::AIO::MFD_HUGETLB>. |
|
|
2489 | |
|
|
2490 | Example: create a new memfd. |
|
|
2491 | |
|
|
2492 | my $fh = IO::AIO::memfd_create "somenameforprocfd", IO::AIO::MFD_CLOEXEC |
|
|
2493 | or die "m,emfd_create: $!\n"; |
2372 | =item $fh = IO::AIO::eventfd [$initval, [$flags]] |
2494 | =item $fh = IO::AIO::eventfd [$initval, [$flags]] |
2373 | |
2495 | |
2374 | This is a direct interface to the Linux L<eventfd(2)> system call. The |
2496 | This is a direct interface to the Linux L<eventfd(2)> system call. The |
2375 | (unhelpful) defaults for C<$initval> and C<$flags> are C<0> for both. |
2497 | (unhelpful) defaults for C<$initval> and C<$flags> are C<0> for both. |
2376 | |
2498 | |
… | |
… | |
2382 | The following symbol flag values are available: C<IO::AIO::EFD_CLOEXEC>, |
2504 | The following symbol flag values are available: C<IO::AIO::EFD_CLOEXEC>, |
2383 | C<IO::AIO::EFD_NONBLOCK> and C<IO::AIO::EFD_SEMAPHORE> (Linux 2.6.30). |
2505 | C<IO::AIO::EFD_NONBLOCK> and C<IO::AIO::EFD_SEMAPHORE> (Linux 2.6.30). |
2384 | |
2506 | |
2385 | Example: create a new eventfd filehandle: |
2507 | Example: create a new eventfd filehandle: |
2386 | |
2508 | |
2387 | $fh = IO::AIO::eventfd 0, IO::AIO::O_CLOEXEC |
2509 | $fh = IO::AIO::eventfd 0, IO::AIO::EFD_CLOEXEC |
2388 | or die "eventfd: $!\n"; |
2510 | or die "eventfd: $!\n"; |
2389 | |
2511 | |
2390 | =item $fh = IO::AIO::timerfd_create $clockid[, $flags] |
2512 | =item $fh = IO::AIO::timerfd_create $clockid[, $flags] |
2391 | |
2513 | |
2392 | This is a direct interface to the Linux L<timerfd_create(2)> system call. The |
2514 | This is a direct interface to the Linux L<timerfd_create(2)> system |
2393 | (unhelpful) default for C<$flags> is C<0>. |
2515 | call. The (unhelpful) default for C<$flags> is C<0>, but your default |
|
|
2516 | should be C<IO::AIO::TFD_CLOEXEC>. |
2394 | |
2517 | |
2395 | On success, the new timerfd filehandle is returned, otherwise returns |
2518 | On success, the new timerfd filehandle is returned, otherwise returns |
2396 | C<undef>. If the eventfd syscall is missing, fails with C<ENOSYS>. |
2519 | C<undef>. If the timerfd_create syscall is missing, fails with C<ENOSYS>. |
2397 | |
2520 | |
2398 | Please refer to L<timerfd_create(2)> for more info on this call. |
2521 | Please refer to L<timerfd_create(2)> for more info on this call. |
2399 | |
2522 | |
2400 | The following C<$clockid> values are |
2523 | The following C<$clockid> values are |
2401 | available: C<IO::AIO::CLOCK_REALTIME>, C<IO::AIO::CLOCK_MONOTONIC> |
2524 | available: C<IO::AIO::CLOCK_REALTIME>, C<IO::AIO::CLOCK_MONOTONIC> |
… | |
… | |
2567 | known issue, rather than a bug. |
2690 | known issue, rather than a bug. |
2568 | |
2691 | |
2569 | =head1 SEE ALSO |
2692 | =head1 SEE ALSO |
2570 | |
2693 | |
2571 | L<AnyEvent::AIO> for easy integration into event loops, L<Coro::AIO> for a |
2694 | L<AnyEvent::AIO> for easy integration into event loops, L<Coro::AIO> for a |
2572 | more natural syntax. |
2695 | more natural syntax and L<IO::FDPass> for file descriptor passing. |
2573 | |
2696 | |
2574 | =head1 AUTHOR |
2697 | =head1 AUTHOR |
2575 | |
2698 | |
2576 | Marc Lehmann <schmorp@schmorp.de> |
2699 | Marc Lehmann <schmorp@schmorp.de> |
2577 | http://home.schmorp.de/ |
2700 | http://home.schmorp.de/ |