[ViewVC] Diff of: cvs/IO-AIO/AIO.pm

Comparing IO-AIO/AIO.pm (file contents):
Revision 1.267 by root, Tue Aug 9 11:39:17 2016 UTC vs.
Revision 1.274 by root, Thu Sep 21 23:43:46 2017 UTC

 use common::sense;
 use base 'Exporter';
 BEGIN {
-   our $VERSION = 4.34;
+   our $VERSION = 4.35;
    our @AIO_REQ = qw(aio_sendfile aio_seek aio_read aio_write aio_open aio_close
                      aio_stat aio_lstat aio_unlink aio_rmdir aio_readdir aio_readdirx
                      aio_scandir aio_symlink aio_readlink aio_realpath aio_fcntl aio_ioctl
                      aio_sync aio_fsync aio_syncfs aio_fdatasync aio_sync_file_range
                      aio_pathsync aio_readahead aio_fiemap aio_allocate
-                     aio_rename aio_link aio_move aio_copy aio_group
+                     aio_rename aio_rename2 aio_link aio_move aio_copy aio_group
                      aio_nop aio_mknod aio_load aio_rmtree aio_mkdir aio_chown
                      aio_chmod aio_utime aio_truncate
                      aio_msync aio_mtouch aio_mlock aio_mlockall
                      aio_statvfs
                      aio_wd);
    aio_link $srcpath, $dstpath, $callback->($status)
    aio_symlink $srcpath, $dstpath, $callback->($status)
    aio_readlink $pathname, $callback->($link)
    aio_realpath $pathname, $callback->($path)
    aio_rename $srcpath, $dstpath, $callback->($status)
+   aio_rename2 $srcpath, $dstpath, $flags, $callback->($status)
    aio_mkdir $pathname, $mode, $callback->($status)
    aio_rmdir $pathname, $callback->($status)
    aio_readdir $pathname, $callback->($entries)
    aio_readdirx $pathname, $flags, $callback->($entries, $flags)
       IO::AIO::READDIR_DENTS IO::AIO::READDIR_DIRS_FIRST
    aio_syncfs $fh, $callback->($status)
    aio_fsync $fh, $callback->($status)
    aio_fdatasync $fh, $callback->($status)
    aio_sync_file_range $fh, $offset, $nbytes, $flags, $callback->($status)
    aio_pathsync $pathname, $callback->($status)
-   aio_msync $scalar, $offset = 0, $length = undef, flags = 0, $callback->($status)
+   aio_msync $scalar, $offset = 0, $length = undef, flags = MS_SYNC, $callback->($status)
    aio_mtouch $scalar, $offset = 0, $length = undef, flags = 0, $callback->($status)
    aio_mlock $scalar, $offset = 0, $length = undef, $callback->($status)
    aio_mlockall $flags, $callback->($status)
    aio_group $callback->(...)
    aio_nop $callback->()
 C<$mode> is usually C<0> or C<IO::AIO::FALLOC_FL_KEEP_SIZE> to allocate
 space, or C<IO::AIO::FALLOC_FL_PUNCH_HOLE | IO::AIO::FALLOC_FL_KEEP_SIZE>,
 to deallocate a file range.
 IO::AIO also supports C<FALLOC_FL_COLLAPSE_RANGE>, to remove a range
-(without leaving a hole) and C<FALLOC_FL_ZERO_RANGE>, to zero a range (see
+(without leaving a hole), C<FALLOC_FL_ZERO_RANGE>, to zero a range,
-your L<fallocate(2)> manpage).
+C<FALLOC_FL_INSERT_RANGE> to insert a range and C<FALLOC_FL_UNSHARE_RANGE>
+to unshare shared blocks (see your L<fallocate(2)> manpage).
 The file system block size used by C<fallocate> is presumably the
-C<f_bsize> returned by C<statvfs>.
+C<f_bsize> returned by C<statvfs>, but different filesystems and filetypes
+can dictate other limitations.
 If C<fallocate> isn't available or cannot be emulated (currently no
 emulation will be attempted), passes C<-1> and sets C<$!> to C<ENOSYS>.
 rename(2) and call the callback with the result code.
 On systems that support the AIO::WD working directory abstraction
 natively, the case C<[$wd, "."]> as C<$srcpath> is specialcased - instead
 of failing, C<rename> is called on the absolute path of C<$wd>.
+=item aio_rename2 $srcpath, $dstpath, $flags, $callback->($status)
+Basically a version of C<aio_rename> with an additional C<$flags>
+argument. Calling this with C<$flags=0> is the same as calling
+C<aio_rename>.
+Non-zero flags are currently only supported on GNU/Linux systems that
+support renameat2. Other systems fail with C<ENOSYS> in this case.
+The following constants are available (missing ones are, as usual C<0>),
+see renameat2(2) for details:
+C<IO::AIO::RENAME_NOREPLACE>, C<IO::AIO::RENAME_EXCHANGE>
+and C<IO::AIO::RENAME_WHITEOUT>.
 =item aio_mkdir $pathname, $mode, $callback->($status)
 Asynchronously mkdir (create) a directory and call the callback with
 other processes), although if you are careful and know what you are doing,
 you still can.
 The following constants are available (missing ones are, as usual C<0>):
+C<F_DUPFD_CLOEXEC>,
+C<F_OFD_GETLK>, C<F_OFD_SETLK>, C<F_OFD_GETLKW>,
 C<FIFREEZE>, C<FITHAW>, C<FITRIM>, C<FICLONE>, C<FICLONERANGE>, C<FIDEDUPERANGE>.
 C<FS_IOC_GETFLAGS>, C<FS_IOC_SETFLAGS>, C<FS_IOC_GETVERSION>, C<FS_IOC_SETVERSION>,
 C<FS_IOC_FIEMAP>.
    };
    $grp
 }
-=item aio_msync $scalar, $offset = 0, $length = undef, flags = 0, $callback->($status)
+=item aio_msync $scalar, $offset = 0, $length = undef, flags = MS_SYNC, $callback->($status)
 This is a rather advanced IO::AIO call, which only works on mmap(2)ed
 scalars (see the C<IO::AIO::mmap> function, although it also works on data
 scalars managed by the L<Sys::Mmap> or L<Mmap> modules, note that the
 scalar must only be modified in-place while an aio operation is pending on
 It calls the C<msync> function of your OS, if available, with the memory
 area starting at C<$offset> in the string and ending C<$length> bytes
 later. If C<$length> is negative, counts from the end, and if C<$length>
 is C<undef>, then it goes till the end of the string. The flags can be
-a combination of C<IO::AIO::MS_ASYNC>, C<IO::AIO::MS_INVALIDATE> and
+either C<IO::AIO::MS_ASYNC> or C<IO::AIO::MS_SYNC>, plus an optional
-C<IO::AIO::MS_SYNC>.
+C<IO::AIO::MS_INVALIDATE>.
 =item aio_mtouch $scalar, $offset = 0, $length = undef, flags = 0, $callback->($status)
 This is a rather advanced IO::AIO call, which works best on mmap(2)ed
 scalars.
 This is a very bad function to use in interactive programs because it
 blocks, and a bad way to reduce concurrency because it is inexact: Better
 use an C<aio_group> together with a feed callback.
 Its main use is in scripts without an event loop - when you want to stat
-a lot of files, you can write somehting like this:
+a lot of files, you can write something like this:
    IO::AIO::max_outstanding 32;
    for my $path (...) {
       aio_stat $path , ...;
 =item IO::AIO::madvise $scalar, $offset, $len, $advice
 Simply calls the C<posix_madvise> function (see its
 manpage for details). The following advice constants are
 available: C<IO::AIO::MADV_NORMAL>, C<IO::AIO::MADV_SEQUENTIAL>,
-C<IO::AIO::MADV_RANDOM>, C<IO::AIO::MADV_WILLNEED>, C<IO::AIO::MADV_DONTNEED>,
+C<IO::AIO::MADV_RANDOM>, C<IO::AIO::MADV_WILLNEED>,
-C<IO::AIO::MADV_FREE>.
+C<IO::AIO::MADV_DONTNEED>.
+If C<$offset> is negative, counts from the end. If C<$length> is negative,
+the remaining length of the C<$scalar> is used. If possible, C<$length>
+will be reduced to fit into the C<$scalar>.
 On systems that do not implement C<posix_madvise>, this function returns
 ENOSYS, otherwise the return value of C<posix_madvise>.
 =item IO::AIO::mprotect $scalar, $offset, $len, $protect
 Simply calls the C<mprotect> function on the preferably AIO::mmap'ed
 $scalar (see its manpage for details). The following protect
 constants are available: C<IO::AIO::PROT_NONE>, C<IO::AIO::PROT_READ>,
 C<IO::AIO::PROT_WRITE>, C<IO::AIO::PROT_EXEC>.
+If C<$offset> is negative, counts from the end. If C<$length> is negative,
+the remaining length of the C<$scalar> is used. If possible, C<$length>
+will be reduced to fit into the C<$scalar>.
 On systems that do not implement C<mprotect>, this function returns
 ENOSYS, otherwise the return value of C<mprotect>.
 =item IO::AIO::mmap $scalar, $length, $prot, $flags, $fh[, $offset]
 Memory-maps a file (or anonymous memory range) and attaches it to the
 given C<$scalar>, which will act like a string scalar. Returns true on
 success, and false otherwise.
+The scalar must exist, but its contents do not matter - this means you
+cannot use a nonexistant array or hash element. When in doubt, C<undef>
+the scalar first.
-The only operations allowed on the scalar are C<substr>/C<vec> that don't
+The only operations allowed on the mmapped scalar are C<substr>/C<vec>,
-change the string length, and most read-only operations such as copying it
+which don't change the string length, and most read-only operations such
-or searching it with regexes and so on.
+as copying it or searching it with regexes and so on.
 Anything else is unsafe and will, at best, result in memory leaks.
 The memory map associated with the C<$scalar> is automatically removed
-when the C<$scalar> is destroyed, or when the C<IO::AIO::mmap> or
+when the C<$scalar> is undef'd or destroyed, or when the C<IO::AIO::mmap>
-C<IO::AIO::munmap> functions are called.
+or C<IO::AIO::munmap> functions are called on it.
 This calls the C<mmap>(2) function internally. See your system's manual
 page for details on the C<$length>, C<$prot> and C<$flags> parameters.
 The C<$length> must be larger than zero and smaller than the actual

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Comparing IO-AIO/AIO.pm (file contents): Revision 1.267 by root, Tue Aug 9 11:39:17 2016 UTC vs. Revision 1.274 by root, Thu Sep 21 23:43:46 2017 UTC

Diff Legend

Comparing IO-AIO/AIO.pm (file contents):
Revision 1.267 by root, Tue Aug 9 11:39:17 2016 UTC vs.
Revision 1.274 by root, Thu Sep 21 23:43:46 2017 UTC