… | |
… | |
94 | |
94 | |
95 | # file contents now in $contents |
95 | # file contents now in $contents |
96 | print $contents; |
96 | print $contents; |
97 | |
97 | |
98 | # exit event loop and program |
98 | # exit event loop and program |
99 | EV::unloop; |
99 | EV::break; |
100 | }; |
100 | }; |
101 | }; |
101 | }; |
102 | |
102 | |
103 | # possibly queue up other requests, or open GUI windows, |
103 | # possibly queue up other requests, or open GUI windows, |
104 | # check for sockets etc. etc. |
104 | # check for sockets etc. etc. |
105 | |
105 | |
106 | # process events as long as there are some: |
106 | # process events as long as there are some: |
107 | EV::loop; |
107 | EV::run; |
108 | |
108 | |
109 | =head1 REQUEST ANATOMY AND LIFETIME |
109 | =head1 REQUEST ANATOMY AND LIFETIME |
110 | |
110 | |
111 | Every C<aio_*> function creates a request. which is a C data structure not |
111 | Every C<aio_*> function creates a request. which is a C data structure not |
112 | directly visible to Perl. |
112 | directly visible to Perl. |
… | |
… | |
167 | use common::sense; |
167 | use common::sense; |
168 | |
168 | |
169 | use base 'Exporter'; |
169 | use base 'Exporter'; |
170 | |
170 | |
171 | BEGIN { |
171 | BEGIN { |
172 | our $VERSION = 4.32; |
172 | our $VERSION = 4.33; |
173 | |
173 | |
174 | our @AIO_REQ = qw(aio_sendfile aio_seek aio_read aio_write aio_open aio_close |
174 | our @AIO_REQ = qw(aio_sendfile aio_seek aio_read aio_write aio_open aio_close |
175 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
175 | aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx |
176 | aio_scandir aio_symlink aio_readlink aio_realpath aio_sync |
176 | aio_scandir aio_symlink aio_readlink aio_realpath aio_fcntl aio_ioctl |
177 | aio_fsync aio_syncfs aio_fdatasync aio_sync_file_range aio_allocate |
177 | aio_sync aio_fsync aio_syncfs aio_fdatasync aio_sync_file_range |
178 | aio_pathsync aio_readahead aio_fiemap |
178 | aio_pathsync aio_readahead aio_fiemap aio_allocate |
179 | aio_rename aio_link aio_move aio_copy aio_group |
179 | aio_rename aio_link aio_move aio_copy aio_group |
180 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
180 | aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown |
181 | aio_chmod aio_utime aio_truncate |
181 | aio_chmod aio_utime aio_truncate |
182 | aio_msync aio_mtouch aio_mlock aio_mlockall |
182 | aio_msync aio_mtouch aio_mlock aio_mlockall |
183 | aio_statvfs |
183 | aio_statvfs |
… | |
… | |
240 | aio_scandir $pathname, $maxreq, $callback->($dirs, $nondirs) |
240 | aio_scandir $pathname, $maxreq, $callback->($dirs, $nondirs) |
241 | aio_load $pathname, $data, $callback->($status) |
241 | aio_load $pathname, $data, $callback->($status) |
242 | aio_copy $srcpath, $dstpath, $callback->($status) |
242 | aio_copy $srcpath, $dstpath, $callback->($status) |
243 | aio_move $srcpath, $dstpath, $callback->($status) |
243 | aio_move $srcpath, $dstpath, $callback->($status) |
244 | aio_rmtree $pathname, $callback->($status) |
244 | aio_rmtree $pathname, $callback->($status) |
|
|
245 | aio_fcntl $fh, $cmd, $arg, $callback->($status) |
|
|
246 | aio_ioctl $fh, $request, $buf, $callback->($status) |
245 | aio_sync $callback->($status) |
247 | aio_sync $callback->($status) |
246 | aio_syncfs $fh, $callback->($status) |
248 | aio_syncfs $fh, $callback->($status) |
247 | aio_fsync $fh, $callback->($status) |
249 | aio_fsync $fh, $callback->($status) |
248 | aio_fdatasync $fh, $callback->($status) |
250 | aio_fdatasync $fh, $callback->($status) |
249 | aio_sync_file_range $fh, $offset, $nbytes, $flags, $callback->($status) |
251 | aio_sync_file_range $fh, $offset, $nbytes, $flags, $callback->($status) |
… | |
… | |
626 | 0x00001373 devfs |
628 | 0x00001373 devfs |
627 | 0x00001cd1 devpts |
629 | 0x00001cd1 devpts |
628 | 0x0000f15f ecryptfs |
630 | 0x0000f15f ecryptfs |
629 | 0x00414a53 efs |
631 | 0x00414a53 efs |
630 | 0x0000137d ext |
632 | 0x0000137d ext |
631 | 0x0000ef53 ext2/ext3 |
633 | 0x0000ef53 ext2/ext3/ext4 |
632 | 0x0000ef51 ext2 |
634 | 0x0000ef51 ext2 |
|
|
635 | 0xf2f52010 f2fs |
633 | 0x00004006 fat |
636 | 0x00004006 fat |
634 | 0x65735546 fuseblk |
637 | 0x65735546 fuseblk |
635 | 0x65735543 fusectl |
638 | 0x65735543 fusectl |
636 | 0x0bad1dea futexfs |
639 | 0x0bad1dea futexfs |
637 | 0x01161970 gfs2 |
640 | 0x01161970 gfs2 |
638 | 0x47504653 gpfs |
641 | 0x47504653 gpfs |
639 | 0x00004244 hfs |
642 | 0x00004244 hfs |
640 | 0xf995e849 hpfs |
643 | 0xf995e849 hpfs |
|
|
644 | 0x00c0ffee hostfs |
641 | 0x958458f6 hugetlbfs |
645 | 0x958458f6 hugetlbfs |
642 | 0x2bad1dea inotifyfs |
646 | 0x2bad1dea inotifyfs |
643 | 0x00009660 isofs |
647 | 0x00009660 isofs |
644 | 0x000072b6 jffs2 |
648 | 0x000072b6 jffs2 |
645 | 0x3153464a jfs |
649 | 0x3153464a jfs |
… | |
… | |
660 | 0x00009fa1 openprom |
664 | 0x00009fa1 openprom |
661 | 0x7461636F ocfs2 |
665 | 0x7461636F ocfs2 |
662 | 0x00009fa0 proc |
666 | 0x00009fa0 proc |
663 | 0x6165676c pstorefs |
667 | 0x6165676c pstorefs |
664 | 0x0000002f qnx4 |
668 | 0x0000002f qnx4 |
|
|
669 | 0x68191122 qnx6 |
665 | 0x858458f6 ramfs |
670 | 0x858458f6 ramfs |
666 | 0x52654973 reiserfs |
671 | 0x52654973 reiserfs |
667 | 0x00007275 romfs |
672 | 0x00007275 romfs |
668 | 0x67596969 rpc_pipefs |
673 | 0x67596969 rpc_pipefs |
669 | 0x73636673 securityfs |
674 | 0x73636673 securityfs |
… | |
… | |
1224 | }; |
1229 | }; |
1225 | |
1230 | |
1226 | $grp |
1231 | $grp |
1227 | } |
1232 | } |
1228 | |
1233 | |
|
|
1234 | =item aio_fcntl $fh, $cmd, $arg, $callback->($status) |
|
|
1235 | |
|
|
1236 | =item aio_ioctl $fh, $request, $buf, $callback->($status) |
|
|
1237 | |
|
|
1238 | These work just like the C<fcntl> and C<ioctl> built-in functions, except |
|
|
1239 | they execute asynchronously and pass the return value to the callback. |
|
|
1240 | |
|
|
1241 | Both calls can be used for a lot of things, some of which make more sense |
|
|
1242 | to run asynchronously in their own thread, while some others make less |
|
|
1243 | sense. For example, calls that block waiting for external events, such |
|
|
1244 | as locking, will also lock down an I/O thread while it is waiting, which |
|
|
1245 | can deadlock the whole I/O system. At the same time, there might be no |
|
|
1246 | alternative to using a thread to wait. |
|
|
1247 | |
|
|
1248 | So in general, you should only use these calls for things that do |
|
|
1249 | (filesystem) I/O, not for things that wait for other events (network, |
|
|
1250 | other processes), although if you are careful and know what you are doing, |
|
|
1251 | you still can. |
|
|
1252 | |
1229 | =item aio_sync $callback->($status) |
1253 | =item aio_sync $callback->($status) |
1230 | |
1254 | |
1231 | Asynchronously call sync and call the callback when finished. |
1255 | Asynchronously call sync and call the callback when finished. |
1232 | |
1256 | |
1233 | =item aio_fsync $fh, $callback->($status) |
1257 | =item aio_fsync $fh, $callback->($status) |
… | |
… | |
2057 | filesize. |
2081 | filesize. |
2058 | |
2082 | |
2059 | C<$prot> is a combination of C<IO::AIO::PROT_NONE>, C<IO::AIO::PROT_EXEC>, |
2083 | C<$prot> is a combination of C<IO::AIO::PROT_NONE>, C<IO::AIO::PROT_EXEC>, |
2060 | C<IO::AIO::PROT_READ> and/or C<IO::AIO::PROT_WRITE>, |
2084 | C<IO::AIO::PROT_READ> and/or C<IO::AIO::PROT_WRITE>, |
2061 | |
2085 | |
2062 | C<$flags> can be a combination of C<IO::AIO::MAP_SHARED> or |
2086 | C<$flags> can be a combination of |
2063 | C<IO::AIO::MAP_PRIVATE>, or a number of system-specific flags (when |
2087 | C<IO::AIO::MAP_SHARED> or |
2064 | not available, the are defined as 0): C<IO::AIO::MAP_ANONYMOUS> |
2088 | C<IO::AIO::MAP_PRIVATE>, |
|
|
2089 | or a number of system-specific flags (when not available, the are C<0>): |
2065 | (which is set to C<MAP_ANON> if your system only provides this |
2090 | C<IO::AIO::MAP_ANONYMOUS> (which is set to C<MAP_ANON> if your system only provides this constant), |
2066 | constant), C<IO::AIO::MAP_HUGETLB>, C<IO::AIO::MAP_LOCKED>, |
2091 | C<IO::AIO::MAP_LOCKED>, |
2067 | C<IO::AIO::MAP_NORESERVE>, C<IO::AIO::MAP_POPULATE> or |
2092 | C<IO::AIO::MAP_NORESERVE>, |
|
|
2093 | C<IO::AIO::MAP_POPULATE>, |
2068 | C<IO::AIO::MAP_NONBLOCK> |
2094 | C<IO::AIO::MAP_NONBLOCK>, |
|
|
2095 | C<IO::AIO::MAP_FIXED>, |
|
|
2096 | C<IO::AIO::MAP_GROWSDOWN>, |
|
|
2097 | C<IO::AIO::MAP_32BIT>, |
|
|
2098 | C<IO::AIO::MAP_HUGETLB> or |
|
|
2099 | C<IO::AIO::MAP_STACK>. |
2069 | |
2100 | |
2070 | If C<$fh> is C<undef>, then a file descriptor of C<-1> is passed. |
2101 | If C<$fh> is C<undef>, then a file descriptor of C<-1> is passed. |
2071 | |
2102 | |
2072 | C<$offset> is the offset from the start of the file - it generally must be |
2103 | C<$offset> is the offset from the start of the file - it generally must be |
2073 | a multiple of C<IO::AIO::PAGESIZE> and defaults to C<0>. |
2104 | a multiple of C<IO::AIO::PAGESIZE> and defaults to C<0>. |