… | |
… | |
394 | following POSIX and non-POSIX constants are available (missing ones on |
394 | following POSIX and non-POSIX constants are available (missing ones on |
395 | your system are, as usual, C<0>): |
395 | your system are, as usual, C<0>): |
396 | |
396 | |
397 | C<O_ASYNC>, C<O_DIRECT>, C<O_NOATIME>, C<O_CLOEXEC>, C<O_NOCTTY>, C<O_NOFOLLOW>, |
397 | C<O_ASYNC>, C<O_DIRECT>, C<O_NOATIME>, C<O_CLOEXEC>, C<O_NOCTTY>, C<O_NOFOLLOW>, |
398 | C<O_NONBLOCK>, C<O_EXEC>, C<O_SEARCH>, C<O_DIRECTORY>, C<O_DSYNC>, |
398 | C<O_NONBLOCK>, C<O_EXEC>, C<O_SEARCH>, C<O_DIRECTORY>, C<O_DSYNC>, |
399 | C<O_RSYNC>, C<O_SYNC> and C<O_TTY_INIT>. |
399 | C<O_RSYNC>, C<O_SYNC>, C<O_PATH>, C<O_TMPFILE>, and C<O_TTY_INIT>. |
400 | |
400 | |
401 | |
401 | |
402 | =item aio_close $fh, $callback->($status) |
402 | =item aio_close $fh, $callback->($status) |
403 | |
403 | |
404 | Asynchronously close a file and call the callback with the result |
404 | Asynchronously close a file and call the callback with the result |
… | |
… | |
725 | =item aio_allocate $fh, $mode, $offset, $len, $callback->($status) |
725 | =item aio_allocate $fh, $mode, $offset, $len, $callback->($status) |
726 | |
726 | |
727 | Allocates or frees disk space according to the C<$mode> argument. See the |
727 | Allocates or frees disk space according to the C<$mode> argument. See the |
728 | linux C<fallocate> documentation for details. |
728 | linux C<fallocate> documentation for details. |
729 | |
729 | |
730 | C<$mode> can currently be C<0> or C<IO::AIO::FALLOC_FL_KEEP_SIZE> |
730 | C<$mode> is usually C<0> or C<IO::AIO::FALLOC_FL_KEEP_SIZE> to allocate |
731 | to allocate space, or C<IO::AIO::FALLOC_FL_PUNCH_HOLE | |
731 | space, or C<IO::AIO::FALLOC_FL_PUNCH_HOLE | IO::AIO::FALLOC_FL_KEEP_SIZE>, |
732 | IO::AIO::FALLOC_FL_KEEP_SIZE>, to deallocate a file range. |
732 | to deallocate a file range. |
|
|
733 | |
|
|
734 | IO::AIO also supports C<FALLOC_FL_COLLAPSE_RANGE>, to remove a range |
|
|
735 | (without leaving a hole) and C<FALLOC_FL_ZERO_RANGE>, to zero a range (see |
|
|
736 | your L<fallocate(2)> manpage). |
733 | |
737 | |
734 | The file system block size used by C<fallocate> is presumably the |
738 | The file system block size used by C<fallocate> is presumably the |
735 | C<f_bsize> returned by C<statvfs>. |
739 | C<f_bsize> returned by C<statvfs>. |
736 | |
740 | |
737 | If C<fallocate> isn't available or cannot be emulated (currently no |
741 | If C<fallocate> isn't available or cannot be emulated (currently no |
… | |
… | |
2122 | Attempts to query or change the pipe buffer size. Obviously works only |
2126 | Attempts to query or change the pipe buffer size. Obviously works only |
2123 | on pipes, and currently works only on GNU/Linux systems, and fails with |
2127 | on pipes, and currently works only on GNU/Linux systems, and fails with |
2124 | C<-1>/C<ENOSYS> everywhere else. If anybody knows how to influence pipe buffer |
2128 | C<-1>/C<ENOSYS> everywhere else. If anybody knows how to influence pipe buffer |
2125 | size on other systems, drop me a note. |
2129 | size on other systems, drop me a note. |
2126 | |
2130 | |
|
|
2131 | =item ($rfh, $wfh) = IO::AIO::pipe2 [$flags] |
|
|
2132 | |
|
|
2133 | This is a direct interface to the Linux L<pipe2(2)> system call. If |
|
|
2134 | C<$flags> is missing or C<0>, then this should be the same as a call to |
|
|
2135 | perl's built-in C<pipe> function and create a new pipe, and works on |
|
|
2136 | systems that lack the pipe2 syscall. On win32, this case invokes C<_pipe |
|
|
2137 | (..., 4096, O_BINARY)>. |
|
|
2138 | |
|
|
2139 | If C<$flags> is non-zero, it tries to invoke the pipe2 system call with |
|
|
2140 | the given flags (Linux 2.6.27, glibc 2.9). |
|
|
2141 | |
|
|
2142 | On success, the read and write file handles are returned. |
|
|
2143 | |
|
|
2144 | On error, nothing will be returned. If the pipe2 syscall is missing and |
|
|
2145 | C<$flags> is non-zero, fails with C<ENOSYS>. |
|
|
2146 | |
|
|
2147 | Please refer to L<pipe2(2)> for more info on the C<$flags>, but at the |
|
|
2148 | time of this writing, C<IO::AIO::O_CLOEXEC>, C<IO::AIO::O_NONBLOCK> and |
|
|
2149 | C<IO::AIO::O_DIRECT> (Linux 3.4, for packet-based pipes) were supported. |
|
|
2150 | |
2127 | =back |
2151 | =back |
2128 | |
2152 | |
2129 | =cut |
2153 | =cut |
2130 | |
2154 | |
2131 | min_parallel 8; |
2155 | min_parallel 8; |