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2 <head>
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3 <title>Calling FFTW from Modern Fortran - FFTW 3.3.4</title>
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4 <meta http-equiv="Content-Type" content="text/html">
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5 <meta name="description" content="FFTW 3.3.4">
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7 <link title="Top" rel="start" href="index.html#Top">
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8 <link rel="prev" href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" title="Distributed-memory FFTW with MPI">
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9 <link rel="next" href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran" title="Calling FFTW from Legacy Fortran">
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10 <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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11 <!--
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12 This manual is for FFTW
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13 (version 3.3.4, 20 September 2013).
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14
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15 Copyright (C) 2003 Matteo Frigo.
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16
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17 Copyright (C) 2003 Massachusetts Institute of Technology.
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18
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19 Permission is granted to make and distribute verbatim copies of
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20 this manual provided the copyright notice and this permission
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21 notice are preserved on all copies.
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22
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23 Permission is granted to copy and distribute modified versions of
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24 this manual under the conditions for verbatim copying, provided
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25 that the entire resulting derived work is distributed under the
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26 terms of a permission notice identical to this one.
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27
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28 Permission is granted to copy and distribute translations of this
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29 manual into another language, under the above conditions for
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30 modified versions, except that this permission notice may be
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31 stated in a translation approved by the Free Software Foundation.
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32 -->
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44 --></style>
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45 </head>
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46 <body>
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47 <div class="node">
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48 <a name="Calling-FFTW-from-Modern-Fortran"></a>
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49 <p>
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50 Next: <a rel="next" accesskey="n" href="Calling-FFTW-from-Legacy-Fortran.html#Calling-FFTW-from-Legacy-Fortran">Calling FFTW from Legacy Fortran</a>,
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51 Previous: <a rel="previous" accesskey="p" href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI">Distributed-memory FFTW with MPI</a>,
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52 Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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53 <hr>
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54 </div>
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55
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56 <h2 class="chapter">7 Calling FFTW from Modern Fortran</h2>
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57
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58 <p><a name="index-Fortran-interface-503"></a>
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59 Fortran 2003 standardized ways for Fortran code to call C libraries,
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60 and this allows us to support a direct translation of the FFTW C API
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61 into Fortran. Compared to the legacy Fortran 77 interface
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62 (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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63 offers many advantages, especially compile-time type-checking and
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64 aligned memory allocation. As of this writing, support for these C
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65 interoperability features seems widespread, having been implemented in
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66 nearly all major Fortran compilers (e.g. GNU, Intel, IBM,
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67 Oracle/Solaris, Portland Group, NAG).
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68 <a name="index-portability-504"></a>
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69 This chapter documents that interface. For the most part, since this
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70 interface allows Fortran to call the C interface directly, the usage
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71 is identical to C translated to Fortran syntax. However, there are a
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72 few subtle points such as memory allocation, wisdom, and data types
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73 that deserve closer attention.
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74
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75 <ul class="menu">
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76 <li><a accesskey="1" href="Overview-of-Fortran-interface.html#Overview-of-Fortran-interface">Overview of Fortran interface</a>
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77 <li><a accesskey="2" href="Reversing-array-dimensions.html#Reversing-array-dimensions">Reversing array dimensions</a>
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78 <li><a accesskey="3" href="FFTW-Fortran-type-reference.html#FFTW-Fortran-type-reference">FFTW Fortran type reference</a>
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79 <li><a accesskey="4" href="Plan-execution-in-Fortran.html#Plan-execution-in-Fortran">Plan execution in Fortran</a>
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80 <li><a accesskey="5" href="Allocating-aligned-memory-in-Fortran.html#Allocating-aligned-memory-in-Fortran">Allocating aligned memory in Fortran</a>
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81 <li><a accesskey="6" href="Accessing-the-wisdom-API-from-Fortran.html#Accessing-the-wisdom-API-from-Fortran">Accessing the wisdom API from Fortran</a>
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82 <li><a accesskey="7" href="Defining-an-FFTW-module.html#Defining-an-FFTW-module">Defining an FFTW module</a>
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83 </ul>
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84
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85 <!-- -->
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86 </body></html>
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87
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