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22 | <a href="./Home">MLton 20180207</a>\r | |
23 | </div>\r | |
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25 | <div id="header">\r | |
26 | <h1>CallingFromCToSML</h1>\r | |
27 | </div>\r | |
28 | <div id="content">\r | |
29 | <div id="preamble">\r | |
30 | <div class="sectionbody">\r | |
31 | <div class="paragraph"><p>MLton’s <a href="ForeignFunctionInterface">ForeignFunctionInterface</a> allows programs to <em>export</em> SML\r | |
32 | functions to be called from C. Suppose you would like export from SML\r | |
33 | a function of type <span class="monospaced">real * char -> int</span> as the C function <span class="monospaced">foo</span>.\r | |
34 | MLton extends the syntax of SML to allow expressions like the\r | |
35 | following:</p></div>\r | |
36 | <div class="listingblock">\r | |
37 | <div class="content monospaced">\r | |
38 | <pre>_export "foo": (real * char -> int) -> unit;</pre>\r | |
39 | </div></div>\r | |
40 | <div class="paragraph"><p>The above expression exports a C function named <span class="monospaced">foo</span>, with\r | |
41 | prototype</p></div>\r | |
42 | <div class="listingblock">\r | |
43 | <div class="content"><div class="highlight"><pre><span class="n">Int32</span> <span class="nf">foo</span> <span class="p">(</span><span class="n">Real64</span> <span class="n">x0</span><span class="p">,</span> <span class="n">Char</span> <span class="n">x1</span><span class="p">);</span>\r | |
44 | </pre></div></div></div>\r | |
45 | <div class="paragraph"><p>The <span class="monospaced">_export</span> expression denotes a function of type\r | |
46 | <span class="monospaced">(real * char -> int) -> unit</span> that when called with a function\r | |
47 | <span class="monospaced">f</span>, arranges for the exported <span class="monospaced">foo</span> function to call <span class="monospaced">f</span>\r | |
48 | when <span class="monospaced">foo</span> is called. So, for example, the following exports and\r | |
49 | defines <span class="monospaced">foo</span>.</p></div>\r | |
50 | <div class="listingblock">\r | |
51 | <div class="content"><div class="highlight"><pre><span class="k">val</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">export</span><span class="w"> </span><span class="s">"foo"</span><span class="p">:</span><span class="w"> </span><span class="p">(</span><span class="n">real</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">char</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">int</span><span class="p">)</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
52 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">(</span><span class="k">fn</span><span class="w"> </span><span class="p">(</span><span class="n">x</span><span class="p">,</span><span class="w"> </span><span class="n">c</span><span class="p">)</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="mi">13</span><span class="w"> </span><span class="n">+</span><span class="w"> </span><span class="n">Real</span><span class="p">.</span><span class="n">floor</span><span class="w"> </span><span class="n">x</span><span class="w"> </span><span class="n">+</span><span class="w"> </span><span class="n">Char</span><span class="p">.</span><span class="n">ord</span><span class="w"> </span><span class="n">c</span><span class="p">)</span><span class="w"></span>\r | |
53 | </pre></div></div></div>\r | |
54 | <div class="paragraph"><p>The general form of an <span class="monospaced">_export</span> expression is</p></div>\r | |
55 | <div class="listingblock">\r | |
56 | <div class="content monospaced">\r | |
57 | <pre>_export "C function name" attr... : cFuncTy -> unit;</pre>\r | |
58 | </div></div>\r | |
59 | <div class="paragraph"><p>The type and the semicolon are not optional. As with <span class="monospaced">_import</span>, a\r | |
60 | sequence of attributes may follow the function name.</p></div>\r | |
61 | <div class="paragraph"><p>MLton’s <span class="monospaced">-export-header</span> option generates a C header file with\r | |
62 | prototypes for all of the functions exported from SML. Include this\r | |
63 | header file in your C files to type check calls to functions exported\r | |
64 | from SML. This header file includes <span class="monospaced">typedef</span>s for the\r | |
65 | <a href="ForeignFunctionInterfaceTypes"> types that can be passed between SML and C</a>.</p></div>\r | |
66 | </div>\r | |
67 | </div>\r | |
68 | <div class="sect1">\r | |
69 | <h2 id="_example">Example</h2>\r | |
70 | <div class="sectionbody">\r | |
71 | <div class="paragraph"><p>Suppose that <span class="monospaced">export.sml</span> is</p></div>\r | |
72 | <div class="listingblock">\r | |
73 | <div class="content"><div class="highlight"><pre><span class="k">val</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">export</span><span class="w"> </span><span class="s">"f"</span><span class="p">:</span><span class="w"> </span><span class="p">(</span><span class="n">int</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">real</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">char</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">char</span><span class="p">)</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
74 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">(</span><span class="k">fn</span><span class="w"> </span><span class="p">(</span><span class="n">i</span><span class="p">,</span><span class="w"> </span><span class="n">r</span><span class="p">,</span><span class="w"> </span><span class="p">_)</span><span class="w"> </span><span class="p">=></span><span class="w"></span>\r | |
75 | <span class="w"> </span><span class="p">(</span><span class="n">print</span><span class="w"> </span><span class="p">(</span><span class="n">concat</span><span class="w"> </span><span class="p">[</span><span class="s">"i = "</span><span class="p">,</span><span class="w"> </span><span class="n">Int</span><span class="p">.</span><span class="n">toString</span><span class="w"> </span><span class="n">i</span><span class="p">,</span><span class="w"></span>\r | |
76 | <span class="w"> </span><span class="s">" r = "</span><span class="p">,</span><span class="w"> </span><span class="n">Real</span><span class="p">.</span><span class="n">toString</span><span class="w"> </span><span class="n">r</span><span class="p">,</span><span class="w"> </span><span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">])</span><span class="w"></span>\r | |
77 | <span class="w"> </span><span class="p">;</span><span class="w"> </span><span class="p">#</span><span class="s">"g"</span><span class="p">))</span><span class="w"></span>\r | |
78 | <span class="k">val</span><span class="w"> </span><span class="n">g</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">import</span><span class="w"> </span><span class="s">"g"</span><span class="w"> </span><span class="n">public</span><span class="w"> </span><span class="n">reentrant</span><span class="p">:</span><span class="w"> </span><span class="n">unit</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
79 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">g</span><span class="w"> </span><span class="p">()</span><span class="w"></span>\r | |
80 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">g</span><span class="w"> </span><span class="p">()</span><span class="w"></span>\r | |
81 | \r | |
82 | <span class="k">val</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">export</span><span class="w"> </span><span class="s">"f2"</span><span class="p">:</span><span class="w"> </span><span class="p">(</span><span class="n">Word8</span><span class="p">.</span><span class="n">word</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">word</span><span class="w"> </span><span class="n">array</span><span class="p">)</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
83 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">(</span><span class="k">fn</span><span class="w"> </span><span class="n">w</span><span class="w"> </span><span class="p">=></span><span class="w"></span>\r | |
84 | <span class="w"> </span><span class="n">Array</span><span class="p">.</span><span class="n">tabulate</span><span class="w"> </span><span class="p">(</span><span class="mi">10</span><span class="p">,</span><span class="w"> </span><span class="k">fn</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="n">Word</span><span class="p">.</span><span class="n">fromLargeWord</span><span class="w"> </span><span class="p">(</span><span class="n">Word8</span><span class="p">.</span><span class="n">toLargeWord</span><span class="w"> </span><span class="n">w</span><span class="p">)))</span><span class="w"></span>\r | |
85 | <span class="k">val</span><span class="w"> </span><span class="n">g2</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">import</span><span class="w"> </span><span class="s">"g2"</span><span class="w"> </span><span class="n">public</span><span class="w"> </span><span class="n">reentrant</span><span class="p">:</span><span class="w"> </span><span class="n">unit</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">word</span><span class="w"> </span><span class="n">array</span><span class="p">;</span><span class="w"></span>\r | |
86 | <span class="k">val</span><span class="w"> </span><span class="n">a</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">g2</span><span class="w"> </span><span class="p">()</span><span class="w"></span>\r | |
87 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">print</span><span class="w"> </span><span class="p">(</span><span class="n">concat</span><span class="w"> </span><span class="p">[</span><span class="s">"0wx"</span><span class="p">,</span><span class="w"> </span><span class="n">Word</span><span class="p">.</span><span class="n">toString</span><span class="w"> </span><span class="p">(</span><span class="n">Array</span><span class="p">.</span><span class="n">sub</span><span class="w"> </span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">)),</span><span class="w"> </span><span class="s">"</span><span class="se">\n</span><span class="s">"</span><span class="p">])</span><span class="w"></span>\r | |
88 | \r | |
89 | <span class="k">val</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">export</span><span class="w"> </span><span class="s">"f3"</span><span class="p">:</span><span class="w"> </span><span class="p">(</span><span class="n">unit</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">)</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
90 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">(</span><span class="k">fn</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="n">print</span><span class="w"> </span><span class="s">"hello</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span><span class="w"></span>\r | |
91 | <span class="k">val</span><span class="w"> </span><span class="n">g3</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">import</span><span class="w"> </span><span class="s">"g3"</span><span class="w"> </span><span class="n">public</span><span class="w"> </span><span class="n">reentrant</span><span class="p">:</span><span class="w"> </span><span class="n">unit</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
92 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">g3</span><span class="w"> </span><span class="p">()</span><span class="w"></span>\r | |
93 | \r | |
94 | <span class="cm">(* This example demonstrates mutual recursion between C and SML. *)</span><span class="w"></span>\r | |
95 | <span class="k">val</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">export</span><span class="w"> </span><span class="s">"f4"</span><span class="p">:</span><span class="w"> </span><span class="p">(</span><span class="n">int</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">)</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
96 | <span class="k">val</span><span class="w"> </span><span class="n">g4</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">import</span><span class="w"> </span><span class="s">"g4"</span><span class="w"> </span><span class="n">public</span><span class="w"> </span><span class="n">reentrant</span><span class="p">:</span><span class="w"> </span><span class="n">int</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
97 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">e</span><span class="w"> </span><span class="p">(</span><span class="k">fn</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">i</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="k">then</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="n">g4</span><span class="w"> </span><span class="p">(</span><span class="n">i</span><span class="w"> </span><span class="n">-</span><span class="w"> </span><span class="mi">1</span><span class="p">))</span><span class="w"></span>\r | |
98 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">g4</span><span class="w"> </span><span class="mi">13</span><span class="w"></span>\r | |
99 | \r | |
100 | <span class="k">val</span><span class="w"> </span><span class="p">(_,</span><span class="w"> </span><span class="n">zzzSet</span><span class="p">)</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">symbol</span><span class="w"> </span><span class="s">"zzz"</span><span class="w"> </span><span class="n">alloc</span><span class="p">:</span><span class="w"> </span><span class="p">(</span><span class="n">unit</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">int</span><span class="p">)</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="p">(</span><span class="n">int</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">);</span><span class="w"></span>\r | |
101 | <span class="k">val</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">zzzSet</span><span class="w"> </span><span class="mi">42</span><span class="w"></span>\r | |
102 | <span class="k">val</span><span class="w"> </span><span class="n">g5</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="p">_</span><span class="n">import</span><span class="w"> </span><span class="s">"g5"</span><span class="w"> </span><span class="n">public</span><span class="p">:</span><span class="w"> </span><span class="n">unit</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="p">;</span><span class="w"></span>\r | |
103 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">g5</span><span class="w"> </span><span class="p">()</span><span class="w"></span>\r | |
104 | \r | |
105 | <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">print</span><span class="w"> </span><span class="s">"success</span><span class="se">\n</span><span class="s">"</span><span class="w"></span>\r | |
106 | </pre></div></div></div>\r | |
107 | <div class="paragraph"><p>Note that the the <span class="monospaced">reentrant</span> attribute is used for <span class="monospaced">_import</span>-ing the\r | |
108 | C functions that will call the <span class="monospaced">_export</span>-ed SML functions.</p></div>\r | |
109 | <div class="paragraph"><p>Create the header file with <span class="monospaced">-export-header</span>.</p></div>\r | |
110 | <div class="listingblock">\r | |
111 | <div class="content monospaced">\r | |
112 | <pre>% mlton -default-ann 'allowFFI true' \\r | |
113 | -export-header export.h \\r | |
114 | -stop tc \\r | |
115 | export.sml</pre>\r | |
116 | </div></div>\r | |
117 | <div class="paragraph"><p><span class="monospaced">export.h</span> now contains the following C prototypes.</p></div>\r | |
118 | <div class="listingblock">\r | |
119 | <div class="content monospaced">\r | |
120 | <pre>Int8 f (Int32 x0, Real64 x1, Int8 x2);\r | |
121 | Pointer f2 (Word8 x0);\r | |
122 | void f3 ();\r | |
123 | void f4 (Int32 x0);\r | |
124 | extern Int32 zzz;</pre>\r | |
125 | </div></div>\r | |
126 | <div class="paragraph"><p>Use <span class="monospaced">export.h</span> in a C program, <span class="monospaced">ffi-export.c</span>, as follows.</p></div>\r | |
127 | <div class="listingblock">\r | |
128 | <div class="content"><div class="highlight"><pre><span class="cp">#include</span> <span class="cpf"><stdio.h></span><span class="cp"></span>\r | |
129 | <span class="cp">#include</span> <span class="cpf">"export.h"</span><span class="cp"></span>\r | |
130 | \r | |
131 | <span class="cm">/* Functions in C are by default PUBLIC symbols */</span>\r | |
132 | <span class="kt">void</span> <span class="nf">g</span> <span class="p">()</span> <span class="p">{</span>\r | |
133 | <span class="n">Char8</span> <span class="n">c</span><span class="p">;</span>\r | |
134 | \r | |
135 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g starting</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>\r | |
136 | <span class="n">c</span> <span class="o">=</span> <span class="n">f</span> <span class="p">(</span><span class="mi">13</span><span class="p">,</span> <span class="mf">17.15</span><span class="p">,</span> <span class="sc">'a'</span><span class="p">);</span>\r | |
137 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g done char = %c</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">c</span><span class="p">);</span>\r | |
138 | <span class="p">}</span>\r | |
139 | \r | |
140 | <span class="n">Pointer</span> <span class="nf">g2</span> <span class="p">()</span> <span class="p">{</span>\r | |
141 | <span class="n">Pointer</span> <span class="n">res</span><span class="p">;</span>\r | |
142 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g2 starting</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>\r | |
143 | <span class="n">res</span> <span class="o">=</span> <span class="n">f2</span> <span class="p">(</span><span class="mh">0xFF</span><span class="p">);</span>\r | |
144 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g2 done</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>\r | |
145 | <span class="k">return</span> <span class="n">res</span><span class="p">;</span>\r | |
146 | <span class="p">}</span>\r | |
147 | \r | |
148 | <span class="kt">void</span> <span class="nf">g3</span> <span class="p">()</span> <span class="p">{</span>\r | |
149 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g3 starting</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>\r | |
150 | <span class="n">f3</span> <span class="p">();</span>\r | |
151 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g3 done</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>\r | |
152 | <span class="p">}</span>\r | |
153 | \r | |
154 | <span class="kt">void</span> <span class="nf">g4</span> <span class="p">(</span><span class="n">Int32</span> <span class="n">i</span><span class="p">)</span> <span class="p">{</span>\r | |
155 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g4 (%d)</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">i</span><span class="p">);</span>\r | |
156 | <span class="n">f4</span> <span class="p">(</span><span class="n">i</span><span class="p">);</span>\r | |
157 | <span class="p">}</span>\r | |
158 | \r | |
159 | <span class="kt">void</span> <span class="nf">g5</span> <span class="p">()</span> <span class="p">{</span>\r | |
160 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g5 ()</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>\r | |
161 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"zzz = %i</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">zzz</span><span class="p">);</span>\r | |
162 | <span class="n">fprintf</span> <span class="p">(</span><span class="n">stderr</span><span class="p">,</span> <span class="s">"g5 done</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span>\r | |
163 | <span class="p">}</span>\r | |
164 | </pre></div></div></div>\r | |
165 | <div class="paragraph"><p>Compile <span class="monospaced">ffi-export.c</span> and <span class="monospaced">export.sml</span>.</p></div>\r | |
166 | <div class="listingblock">\r | |
167 | <div class="content monospaced">\r | |
168 | <pre>% gcc -c ffi-export.c\r | |
169 | % mlton -default-ann 'allowFFI true' \\r | |
170 | export.sml ffi-export.o</pre>\r | |
171 | </div></div>\r | |
172 | <div class="paragraph"><p>Finally, run <span class="monospaced">export</span>.</p></div>\r | |
173 | <div class="listingblock">\r | |
174 | <div class="content monospaced">\r | |
175 | <pre>% ./export\r | |
176 | g starting\r | |
177 | ...\r | |
178 | g4 (0)\r | |
179 | success</pre>\r | |
180 | </div></div>\r | |
181 | </div>\r | |
182 | </div>\r | |
183 | <div class="sect1">\r | |
184 | <h2 id="_download">Download</h2>\r | |
185 | <div class="sectionbody">\r | |
186 | <div class="ulist"><ul>\r | |
187 | <li>\r | |
188 | <p>\r | |
189 | <a href="https://raw.github.com/MLton/mlton/master/doc/examples/ffi/export.sml"><span class="monospaced">export.sml</span></a>\r | |
190 | </p>\r | |
191 | </li>\r | |
192 | <li>\r | |
193 | <p>\r | |
194 | <a href="https://raw.github.com/MLton/mlton/master/doc/examples/ffi/ffi-export.c"><span class="monospaced">ffi-export.c</span></a>\r | |
195 | </p>\r | |
196 | </li>\r | |
197 | </ul></div>\r | |
198 | </div>\r | |
199 | </div>\r | |
200 | </div>\r | |
201 | <div id="footnotes"><hr></div>\r | |
202 | <div id="footer">\r | |
203 | <div id="footer-text">\r | |
204 | </div>\r | |
205 | <div id="footer-badges">\r | |
206 | </div>\r | |
207 | </div>\r | |
208 | </body>\r | |
209 | </html>\r |