/*
 * This file is part of the StarPU Handbook.
 * Copyright (C) 2009--2011  Universit@'e de Bordeaux 1
 * Copyright (C) 2010, 2011, 2012, 2013  Centre National de la Recherche Scientifique
 * Copyright (C) 2011, 2012 Institut National de Recherche en Informatique et Automatique
 * See the file version.doxy for copying conditions.
 */

/*! \defgroup FFT_Support FFT Support

\fn void * starpufft_malloc(size_t n)
\ingroup FFT_Support
Allocates memory for \p n bytes. This is preferred over malloc(),
since it allocates pinned memory, which allows overlapped transfers.

\fn void * starpufft_free(void *p)
\ingroup FFT_Support
Release memory previously allocated.

\fn struct starpufft_plan * starpufft_plan_dft_1d(int n, int sign, unsigned flags)
\ingroup FFT_Support
Initializes a plan for 1D FFT of size \p n. \p sign can be STARPUFFT_FORWARD
or STARPUFFT_INVERSE. \p flags must be 0.

\fn struct starpufft_plan * starpufft_plan_dft_2d(int n, int m, int sign, unsigned flags)
\ingroup FFT_Support
Initializes a plan for 2D FFT of size (\p n, \p m). \p sign can be
STARPUFFT_FORWARD or STARPUFFT_INVERSE. flags must be \p 0.

\fn struct starpu_task * starpufft_start(starpufft_plan p, void *in, void *out)
\ingroup FFT_Support
Start an FFT previously planned as \p p, using \p in and \p out as
input and output. This only submits the task and does not wait for it.
The application should call starpufft_cleanup() to unregister the

\fn struct starpu_task * starpufft_start_handle(starpufft_plan p, starpu_data_handle_t in, starpu_data_handle_t out)
\ingroup FFT_Support
Start an FFT previously planned as \p p, using data handles \p in and
\p out as input and output (assumed to be vectors of elements of the
expected types). This only submits the task and does not wait for it.

\fn void starpufft_execute(starpufft_plan p, void *in, void *out)
\ingroup FFT_Support
Execute an FFT previously planned as \p p, using \p in and \p out as
input and output. This submits and waits for the task.

\fn void starpufft_execute_handle(starpufft_plan p, starpu_data_handle_t in, starpu_data_handle_t out)
\ingroup FFT_Support
Execute an FFT previously planned as \p p, using data handles \p in
and \p out as input and output (assumed to be vectors of elements of
the expected types). This submits and waits for the task.

\fn void starpufft_cleanup(starpufft_plan p)
\ingroup FFT_Support
Releases data for plan \p p, in the starpufft_start() case.

\fn void starpufft_destroy_plan(starpufft_plan p)
\ingroup FFT_Support
Destroys plan \p p, i.e. release all CPU (fftw) and GPU (cufft)
resources.

*/