POSIX AIO library for linux
			Laurent Vivier <Laurent.Vivier@bull.net>
			Sébastien Dugué <Sebastien.Dugue@bull.net>
			   http://www.bullopensource.org/posix
				     November 2005

	This library uses the native AIO API of linux kernel to implement POSIX AIO.

	To use this library, you need at least a 2.6 vanilla kernel, but if you want
	a full implementation of POSIX AIO you'll need to patch this kernel.
	
Features needing kernel patches are:

	FEATURE1: request completion event (enable sigevent field of struct aiocb)

	FEATURE2: list of requests completion event (enable sigevent parameter of
		  lio_listio()) and kernel space LIO_WAIT mechanism.

	FEATURE3: aio_cancel() on a file descriptor (aiocb = NULL)

Optional features needing kernel patches are:

	FEATURE5: system wide default value for max events (maxevents parameter of
		  io_setup() ). By default, uses a developer defined value.

Not implemented features, needing kernel patch (not available):

	- aio_reqprio, request priority management

Patches repository:

	All patches can be found at //www.bullopensource.org/posix

	Patches for the 2.6.10 kernel upward are distributed as quilt patches.

Build:

	Features supported by current kernel are autodetected by the configure
	script. But, you can enable/disable them with following script parameters:

	FEATURE1: --enable-aio-signal or --disable-aio-signal
	FEATURE2: --enable-lio-signal or --disable-lio-signal
	FEATURE3: --enable-cancel-fd or --disable-cancel-fd
	FEATURE4: --enable-lio-wait or --disable-lio-wait
	FEATURE5: --enable-default-maxevents or --disable-default-maxevents

To build the library, you need to follow following steps:

	1- patch your kernel with needed patches and install it
	2- tar xf libposix-aio-*.tar.gz
	3- cd libposix-aio-*
	4- ./configure
	5- make
	6- make install (you must be root)

If you want to use the library, you must link edit your application with libposix-aio.
You can't use LD_PRELOAD to replace librt, because aiocb data structure is different.

Send any comment to Laurent.Vivier@bull.net