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<h1>ForeignFunctionInterface</h1>
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<div class="paragraph"><p>MLton’s foreign function interface (FFI) extends Standard ML and makes
it easy to take the address of C global objects, access C global
variables, call from SML to C, and call from C to SML. MLton also
provides <a href="MLNLFFI">ML-NLFFI</a>, which is a higher-level FFI for calling
C functions and manipulating C data from SML.</p></div>
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<h2 id="_overview">Overview</h2>
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<div class="ulist"><ul>
<li>
<p>
<a href="ForeignFunctionInterfaceTypes">Foreign Function Interface Types</a>
</p>
</li>
<li>
<p>
<a href="ForeignFunctionInterfaceSyntax">Foreign Function Interface Syntax</a>
</p>
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<div class="sect1">
<h2 id="_importing_code_into_sml">Importing Code into SML</h2>
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<li>
<p>
<a href="CallingFromSMLToC">Calling From SML To C</a>
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</li>
<li>
<p>
<a href="CallingFromSMLToCFunctionPointer">Calling From SML To C Function Pointer</a>
</p>
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<h2 id="_exporting_code_from_sml">Exporting Code from SML</h2>
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<li>
<p>
<a href="CallingFromCToSML">Calling From C To SML</a>
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