<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="generator" content="AsciiDoc 8.6.8"> <title>ConcurrentML</title> <link rel="stylesheet" href="./asciidoc.css" type="text/css"> <link rel="stylesheet" href="./pygments.css" type="text/css"> <script type="text/javascript" src="./asciidoc.js"></script> <script type="text/javascript"> /*<![CDATA[*/ asciidoc.install(); /*]]>*/ </script> <link rel="stylesheet" href="./mlton.css" type="text/css"/> </head> <body class="article"> <div id="banner"> <div id="banner-home"> <a href="./Home">MLton 20130715</a> </div> </div> <div id="header"> <h1>ConcurrentML</h1> </div> <div id="content"> <div id="preamble"> <div class="sectionbody"> <div class="paragraph"><p><a href="http://cml.cs.uchicago.edu/">Concurrent ML</a> is an SML concurrency library based on synchronous message passing. MLton has an initial port of CML from SML/NJ, but is missing a thread-safe wrapper around the Basis Library and event-based equivalents to <span class="monospaced">IO</span> and <span class="monospaced">OS</span> functions.</p></div> <div class="paragraph"><p>All of the core CML functionality is present.</p></div> <div class="listingblock"> <div class="content"><div class="highlight"><pre><span class="k">structure</span><span class="w"> </span><span class="n">CML</span><span class="p">:</span><span class="w"> </span><span class="n">CML</span><span class="w"></span> <span class="k">structure</span><span class="w"> </span><span class="n">SyncVar</span><span class="p">:</span><span class="w"> </span><span class="n">SYNC_VAR</span><span class="w"></span> <span class="k">structure</span><span class="w"> </span><span class="n">Mailbox</span><span class="p">:</span><span class="w"> </span><span class="n">MAILBOX</span><span class="w"></span> <span class="k">structure</span><span class="w"> </span><span class="n">Multicast</span><span class="p">:</span><span class="w"> </span><span class="n">MULTICAST</span><span class="w"></span> <span class="k">structure</span><span class="w"> </span><span class="n">SimpleRPC</span><span class="p">:</span><span class="w"> </span><span class="n">SIMPLE_RPC</span><span class="w"></span> <span class="k">structure</span><span class="w"> </span><span class="n">RunCML</span><span class="p">:</span><span class="w"> </span><span class="n">RUN_CML</span><span class="w"></span> </pre></div></div></div> <div class="paragraph"><p>The <span class="monospaced">RUN_CML</span> signature is minimal.</p></div> <div class="listingblock"> <div class="content"><div class="highlight"><pre><span class="k">signature</span><span class="w"> </span><span class="n">RUN_CML</span><span class="w"> </span><span class="p">=</span><span class="w"></span> <span class="w"> </span><span class="k">sig</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">isRunning</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">bool</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">doit</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="n">*</span><span class="w"> </span><span class="n">Time</span><span class="p">.</span><span class="n">time</span><span class="w"> </span><span class="n">option</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">OS</span><span class="p">.</span><span class="n">Process</span><span class="p">.</span><span class="n">status</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">shutdown</span><span class="p">:</span><span class="w"> </span><span class="n">OS</span><span class="p">.</span><span class="n">Process</span><span class="p">.</span><span class="n">status</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">'a</span><span class="w"></span> <span class="w"> </span><span class="k">end</span><span class="w"></span> </pre></div></div></div> <div class="paragraph"><p>MLton’s <span class="monospaced">RunCML</span> structure does not include all of the cleanup and logging operations of SML/NJ’s <span class="monospaced">RunCML</span> structure. However, the implementation does include the <span class="monospaced">CML.timeOutEvt</span> and <span class="monospaced">CML.atTimeEvt</span> functions, and a preemptive scheduler that knows to sleep when there are no ready threads and some threads blocked on time events.</p></div> <div class="paragraph"><p>Because MLton does not wrap the Basis Library for CML, the "right" way to call a Basis Library function that is stateful is to wrap the call with <span class="monospaced">MLton.Thread.atomically</span>.</p></div> </div> </div> <div class="sect1"> <h2 id="_usage">Usage</h2> <div class="sectionbody"> <div class="ulist"><ul> <li> <p> You can import the CML Library into an MLB file with: </p> <table class="tableblock frame-all grid-all" style=" width:100%; "> <col style="width:50%;"> <col style="width:50%;"> <thead> <tr> <th class="tableblock halign-left valign-top" >MLB file</th> <th class="tableblock halign-left valign-top" >Description</th> </tr> </thead> <tbody> <tr> <td class="tableblock halign-left valign-top" ><p class="tableblock"><span class="monospaced">$(SML_LIB)/cml/cml.mlb</span></p></td> <td class="tableblock halign-left valign-top" ><p class="tableblock"></p></td> </tr> </tbody> </table> </li> <li> <p> If you are porting a project from SML/NJ’s <a href="CompilationManager">CompilationManager</a> to MLton’s <a href="MLBasis"> ML Basis system</a> using <span class="monospaced">cm2mlb</span>, note that the following map is included by default: </p> <div class="listingblock"> <div class="content monospaced"> <pre># CML Library $cml $(SML_LIB)/cml $cml/cml.cm $(SML_LIB)/cml/cml.mlb</pre> </div></div> <div class="paragraph"><p>This will automatically convert a <span class="monospaced">$cml/cml.cm</span> import in an input <span class="monospaced">.cm</span> file into a <span class="monospaced">$(SML_LIB)/cml/cml.mlb</span> import in the output <span class="monospaced">.mlb</span> file.</p></div> </li> </ul></div> </div> </div> <div class="sect1"> <h2 id="_also_see">Also see</h2> <div class="sectionbody"> <div class="ulist"><ul> <li> <p> <a href="ConcurrentMLImplementation">ConcurrentMLImplementation</a> </p> </li> <li> <p> <a href="eXene">eXene</a> </p> </li> </ul></div> </div> </div> </div> <div id="footnotes"><hr></div> <div id="footer"> <div id="footer-text"> </div> <div id="footer-badges"> </div> </div> </body> </html>
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