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1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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2 <html>
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3 <!-- This manual is for FFTW
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4 (version 3.3.8, 24 May 2018).
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5
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6 Copyright (C) 2003 Matteo Frigo.
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7
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8 Copyright (C) 2003 Massachusetts Institute of Technology.
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9
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10 Permission is granted to make and distribute verbatim copies of this
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11 manual provided the copyright notice and this permission notice are
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12 preserved on all copies.
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13
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14 Permission is granted to copy and distribute modified versions of this
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15 manual under the conditions for verbatim copying, provided that the
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16 entire resulting derived work is distributed under the terms of a
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17 permission notice identical to this one.
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18
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19 Permission is granted to copy and distribute translations of this manual
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20 into another language, under the above conditions for modified versions,
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22 approved by the Free Software Foundation. -->
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24 <head>
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25 <title>FFTW 3.3.8: Calling FFTW from Modern Fortran</title>
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26
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27 <meta name="description" content="FFTW 3.3.8: Calling FFTW from Modern Fortran">
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33 <link href="index.html#Top" rel="start" title="Top">
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34 <link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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35 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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36 <link href="index.html#Top" rel="up" title="Top">
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37 <link href="Overview-of-Fortran-interface.html#Overview-of-Fortran-interface" rel="next" title="Overview of Fortran interface">
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38 <link href="FFTW-MPI-Fortran-Interface.html#FFTW-MPI-Fortran-Interface" rel="prev" title="FFTW MPI Fortran Interface">
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64 -->
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65 </style>
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66
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67
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68 </head>
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69
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70 <body lang="en">
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71 <a name="Calling-FFTW-from-Modern-Fortran"></a>
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72 <div class="header">
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73 <p>
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74 Next: <a href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran" accesskey="n" rel="next">Calling FFTW from Legacy Fortran</a>, Previous: <a href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" accesskey="p" rel="prev">Distributed-memory FFTW with MPI</a>, Up: <a href="index.html#Top" 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#Concept-Index" title="Index" rel="index">Index</a>]</p>
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75 </div>
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76 <hr>
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77 <a name="Calling-FFTW-from-Modern-Fortran-1"></a>
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78 <h2 class="chapter">7 Calling FFTW from Modern Fortran</h2>
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79 <a name="index-Fortran-interface-2"></a>
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80
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81 <p>Fortran 2003 standardized ways for Fortran code to call C libraries,
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82 and this allows us to support a direct translation of the FFTW C API
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83 into Fortran. Compared to the legacy Fortran 77 interface
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84 (see <a href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran">Calling FFTW from Legacy Fortran</a>), this direct interface
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85 offers many advantages, especially compile-time type-checking and
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86 aligned memory allocation. As of this writing, support for these C
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87 interoperability features seems widespread, having been implemented in
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88 nearly all major Fortran compilers (e.g. GNU, Intel, IBM,
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89 Oracle/Solaris, Portland Group, NAG).
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90 <a name="index-portability-4"></a>
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91 </p>
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92 <p>This chapter documents that interface. For the most part, since this
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93 interface allows Fortran to call the C interface directly, the usage
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94 is identical to C translated to Fortran syntax. However, there are a
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95 few subtle points such as memory allocation, wisdom, and data types
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96 that deserve closer attention.
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97 </p>
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98 <table class="menu" border="0" cellspacing="0">
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99 <tr><td align="left" valign="top">• <a href="Overview-of-Fortran-interface.html#Overview-of-Fortran-interface" accesskey="1">Overview of Fortran interface</a>:</td><td> </td><td align="left" valign="top">
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100 </td></tr>
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101 <tr><td align="left" valign="top">• <a href="Reversing-array-dimensions.html#Reversing-array-dimensions" accesskey="2">Reversing array dimensions</a>:</td><td> </td><td align="left" valign="top">
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102 </td></tr>
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103 <tr><td align="left" valign="top">• <a href="FFTW-Fortran-type-reference.html#FFTW-Fortran-type-reference" accesskey="3">FFTW Fortran type reference</a>:</td><td> </td><td align="left" valign="top">
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104 </td></tr>
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105 <tr><td align="left" valign="top">• <a href="Plan-execution-in-Fortran.html#Plan-execution-in-Fortran" accesskey="4">Plan execution in Fortran</a>:</td><td> </td><td align="left" valign="top">
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106 </td></tr>
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107 <tr><td align="left" valign="top">• <a href="Allocating-aligned-memory-in-Fortran.html#Allocating-aligned-memory-in-Fortran" accesskey="5">Allocating aligned memory in Fortran</a>:</td><td> </td><td align="left" valign="top">
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108 </td></tr>
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109 <tr><td align="left" valign="top">• <a href="Accessing-the-wisdom-API-from-Fortran.html#Accessing-the-wisdom-API-from-Fortran" accesskey="6">Accessing the wisdom API from Fortran</a>:</td><td> </td><td align="left" valign="top">
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110 </td></tr>
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111 <tr><td align="left" valign="top">• <a href="Defining-an-FFTW-module.html#Defining-an-FFTW-module" accesskey="7">Defining an FFTW module</a>:</td><td> </td><td align="left" valign="top">
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112 </td></tr>
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113 </table>
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114
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115
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116
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117
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118 </body>
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119 </html>
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