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<a href="./Home">MLton 20201002</a>
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<h1>MLNLFFI</h1>
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<div id="preamble">
<div class="sectionbody">
<div class="paragraph"><p><a href="References#Blume01"> ML-NLFFI</a> is the no-longer-foreign-function interface
library for SML.</p></div>
<div class="paragraph"><p>As of 20050212, MLton has an initial port of ML-NLFFI from SML/NJ to
MLton.  All of the ML-NLFFI functionality is present.</p></div>
<div class="paragraph"><p>Additionally, MLton has an initial port of the
<a href="MLNLFFIGen">mlnlffigen</a> tool from SML/NJ to MLton.  Due to low-level
details, the code generated by SML/NJ&#8217;s <span class="monospaced">ml-nlffigen</span> is not
compatible with MLton, and vice-versa.  However, the generated code
has the same interface, so portable client code can be written.
MLton&#8217;s <span class="monospaced">mlnlffigen</span> does not currently support C functions with
<span class="monospaced">struct</span> or <span class="monospaced">union</span> arguments.</p></div>
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<div class="sect1">
<h2 id="_usage">Usage</h2>
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<div class="ulist"><ul>
<li>
<p>
You can import the ML-NLFFI Library into an MLB file with
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<th class="tableblock halign-left valign-top" >MLB file</th>
<th class="tableblock halign-left valign-top" >Description</th>
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<td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">$(SML_LIB)/mlnlffi-lib/mlnlffi-lib.mlb</span></p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td>
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<p>
If you are porting a project from SML/NJ&#8217;s <a href="CompilationManager">CompilationManager</a> to
MLton&#8217;s <a href="MLBasis"> ML Basis system</a> using <span class="monospaced">cm2mlb</span>, note that the
following maps are included by default:
</p>
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<div class="content monospaced">
<pre># MLNLFFI Library
$c                                      $(SML_LIB)/mlnlffi-lib
$c/c.cm                                 $(SML_LIB)/mlnlffi-lib/mlnlffi-lib.mlb</pre>
</div></div>
<div class="paragraph"><p>This will automatically convert a <span class="monospaced">$/c.cm</span> import in an input <span class="monospaced">.cm</span>
file into a <span class="monospaced">$(SML_LIB)/mlnlffi-lib/mlnlffi-lib.mlb</span> import in the
output <span class="monospaced">.mlb</span> file.</p></div>
</li>
</ul></div>
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<h2 id="_also_see">Also see</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
<a href="References#Blume01">Blume01</a>
</p>
</li>
<li>
<p>
<a href="MLNLFFIImplementation">MLNLFFIImplementation</a>
</p>
</li>
<li>
<p>
<a href="MLNLFFIGen">MLNLFFIGen</a>
</p>
</li>
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