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108 lines
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HTML
108 lines
5.5 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This manual is for FFTW
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(version 3.3.10, 10 December 2020).
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Copyright (C) 2003 Matteo Frigo.
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Copyright (C) 2003 Massachusetts Institute of Technology.
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Permission is granted to make and distribute verbatim copies of this
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manual provided the copyright notice and this permission notice are
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preserved on all copies.
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Permission is granted to copy and distribute modified versions of this
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manual under the conditions for verbatim copying, provided that the
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entire resulting derived work is distributed under the terms of a
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permission notice identical to this one.
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Permission is granted to copy and distribute translations of this manual
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into another language, under the above conditions for modified versions,
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except that this permission notice may be stated in a translation
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approved by the Free Software Foundation. -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>Calling FFTW from Modern Fortran (FFTW 3.3.10)</title>
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<meta name="description" content="Calling FFTW from Modern Fortran (FFTW 3.3.10)">
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<meta name="keywords" content="Calling FFTW from Modern Fortran (FFTW 3.3.10)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="index.html" rel="up" title="Top">
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<link href="Overview-of-Fortran-interface.html" rel="next" title="Overview of Fortran interface">
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<link href="FFTW-MPI-Fortran-Interface.html" rel="prev" title="FFTW MPI Fortran Interface">
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</head>
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<body lang="en">
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<span id="Calling-FFTW-from-Modern-Fortran"></span><div class="header">
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<p>
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Next: <a href="Calling-FFTW-from-Legacy-Fortran.html" accesskey="n" rel="next">Calling FFTW from Legacy Fortran</a>, Previous: <a href="Distributed_002dmemory-FFTW-with-MPI.html" accesskey="p" rel="prev">Distributed-memory FFTW with MPI</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<span id="Calling-FFTW-from-Modern-Fortran-1"></span><h2 class="chapter">7 Calling FFTW from Modern Fortran</h2>
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<span id="index-Fortran-interface-2"></span>
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<p>Fortran 2003 standardized ways for Fortran code to call C libraries,
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and this allows us to support a direct translation of the FFTW C API
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into Fortran. Compared to the legacy Fortran 77 interface
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(see <a href="Calling-FFTW-from-Legacy-Fortran.html">Calling FFTW from Legacy Fortran</a>), this direct interface
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offers many advantages, especially compile-time type-checking and
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aligned memory allocation. As of this writing, support for these C
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interoperability features seems widespread, having been implemented in
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nearly all major Fortran compilers (e.g. GNU, Intel, IBM,
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Oracle/Solaris, Portland Group, NAG).
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<span id="index-portability-4"></span>
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</p>
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<p>This chapter documents that interface. For the most part, since this
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interface allows Fortran to call the C interface directly, the usage
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is identical to C translated to Fortran syntax. However, there are a
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few subtle points such as memory allocation, wisdom, and data types
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that deserve closer attention.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="Overview-of-Fortran-interface.html" accesskey="1">Overview of Fortran interface</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Reversing-array-dimensions.html" accesskey="2">Reversing array dimensions</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="FFTW-Fortran-type-reference.html" accesskey="3">FFTW Fortran type reference</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Plan-execution-in-Fortran.html" accesskey="4">Plan execution in Fortran</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Allocating-aligned-memory-in-Fortran.html" accesskey="5">Allocating aligned memory in Fortran</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Accessing-the-wisdom-API-from-Fortran.html" accesskey="6">Accessing the wisdom API from Fortran</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Defining-an-FFTW-module.html" accesskey="7">Defining an FFTW module</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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</table>
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</body>
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</html>
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