--- IO-AIO/AIO.pm	2016/06/09 03:15:37	1.262
+++ IO-AIO/AIO.pm	2016/08/09 11:39:17	1.267
@@ -1,6 +1,6 @@
 =head1 NAME
 
-IO::AIO - Asynchronous Input/Output
+IO::AIO - Asynchronous/Advanced Input/Output
 
 =head1 SYNOPSIS
 
@@ -60,6 +60,10 @@
 aio_write, so the remaining functionality would have to be implemented
 using threads anyway.
 
+In addition to asynchronous I/O, this module also exports some rather
+arcane interfaces, such as C<madvise> or linux's C<splice> system call,
+which is why the C<A> in C<AIO> can also mean I<advanced>.
+
 Although the module will work in the presence of other (Perl-) threads,
 it is currently not reentrant in any way, so use appropriate locking
 yourself, always call C<poll_cb> from within the same thread, or never
@@ -443,8 +447,8 @@
 =item aio_write $fh,$offset,$length, $data,$dataoffset, $callback->($retval)
 
 Reads or writes C<$length> bytes from or to the specified C<$fh> and
-C<$offset> into the scalar given by C<$data> and offset C<$dataoffset>
-and calls the callback without the actual number of bytes read (or -1 on
+C<$offset> into the scalar given by C<$data> and offset C<$dataoffset> and
+calls the callback with the actual number of bytes transferred (or -1 on
 error, just like the syscall).
 
 C<aio_read> will, like C<sysread>, shrink or grow the C<$data> scalar to
@@ -1250,6 +1254,27 @@
 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<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>.
+
+C<FS_IOC_FSGETXATTR>, C<FS_IOC_FSSETXATTR>, C<FS_IOC_SET_ENCRYPTION_POLICY>,
+C<FS_IOC_GET_ENCRYPTION_PWSALT>, C<FS_IOC_GET_ENCRYPTION_POLICY>, C<FS_KEY_DESCRIPTOR_SIZE>.
+
+C<FS_SECRM_FL>, C<FS_UNRM_FL>, C<FS_COMPR_FL>, C<FS_SYNC_FL>, C<FS_IMMUTABLE_FL>,
+C<FS_APPEND_FL>, C<FS_NODUMP_FL>, C<FS_NOATIME_FL>, C<FS_DIRTY_FL>,
+C<FS_COMPRBLK_FL>, C<FS_NOCOMP_FL>, C<FS_ENCRYPT_FL>, C<FS_BTREE_FL>,
+C<FS_INDEX_FL>, C<FS_JOURNAL_DATA_FL>, C<FS_NOTAIL_FL>, C<FS_DIRSYNC_FL>, C<FS_TOPDIR_FL>,
+C<FS_FL_USER_MODIFIABLE>.
+
+C<FS_XFLAG_REALTIME>, C<FS_XFLAG_PREALLOC>, C<FS_XFLAG_IMMUTABLE>, C<FS_XFLAG_APPEND>,
+C<FS_XFLAG_SYNC>, C<FS_XFLAG_NOATIME>, C<FS_XFLAG_NODUMP>, C<FS_XFLAG_RTINHERIT>,
+C<FS_XFLAG_PROJINHERIT>, C<FS_XFLAG_NOSYMLINKS>, C<FS_XFLAG_EXTSIZE>, C<FS_XFLAG_EXTSZINHERIT>,
+C<FS_XFLAG_NODEFRAG>, C<FS_XFLAG_FILESTREAM>, C<FS_XFLAG_DAX>, C<FS_XFLAG_HASATTR>,
+
 =item aio_sync $callback->($status)
 
 Asynchronously call sync and call the callback when finished.
@@ -2043,7 +2068,8 @@
 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_DONTNEED>,
+C<IO::AIO::MADV_FREE>.
 
 On systems that do not implement C<posix_madvise>, this function returns
 ENOSYS, otherwise the return value of C<posix_madvise>.