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| <div id="toctitle">Index</div> |
| <ul class="sectlevel1"><li><a style="" href="../index.html">Home</a></li><li><a style="" href="../site/download.html">Download</a></li><li><a style="" href="../site/developers.html">Developers</a></li><li><a style="" href="../user_guide.html">User guide</a><ul class="sectlevel2"><li><a style="" href="../overview/intro.html">Language overview</a><ul class="sectlevel3"><li><a style="" href="../overview/gettingstarted.html">Getting started</a><ul class="sectlevel4"></ul></li><li><a style="" href="language.html">Language</a><ul class="sectlevel4"><li><a style="" href="types.html">Types</a><ul class="sectlevel5"></ul></li><li><a style="font-weight: bold" href="interfaces.html">Interface signatures</a><ul class="sectlevel5"></ul></li><li><a style="" href="statemachines.html">Interfaces</a><ul class="sectlevel5"><li><a style="" href="states.html">States</a><ul class="sectlevel6"></ul></li><li><a style="" href="transitions.html">Transitions</a><ul class="sectlevel6"></ul></li><li><a style="" 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href="../tutorial/activity4.html">Activity 4: Extend the specification of the service interface</a><ul class="sectlevel5"></ul></li><li><a style="" href="../tutorial/activity5.html">Activity 5: Add a time constraint</a><ul class="sectlevel5"></ul></li><li><a style="" href="../tutorial/activity6.html">Activity 6: Documentation generation</a><ul class="sectlevel5"></ul></li></ul></li><li><a style="" href="../tutorial/coincheckinterface.html">Coin checker interface</a><ul class="sectlevel4"><li><a style="" href="../tutorial/activity7.html">Activity 7: State machine of the coin checker</a><ul class="sectlevel5"></ul></li><li><a style="" href="../tutorial/activity8.html">Activity 8: Check the specified interfaces by monitoring</a><ul class="sectlevel5"></ul></li></ul></li><li><a style="" href="../tutorial/userinterface.html">User interface</a><ul class="sectlevel4"><li><a style="" href="../tutorial/activity9.html">Activity 9: State machine of the user interface</a><ul 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| </div> |
| </div> |
| <div id="content"> |
| <div class="sect1"> |
| <h2 id="_interface_signatures"><a class="anchor" href="#_interface_signatures"></a>Interface Signatures</h2> |
| <div class="sectionbody"> |
| <div class="paragraph normal"> |
| <p>Signatures are defined in files with extension '.signature'. A signature model may optionally:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>import existing <a href="types.html">type models</a></p> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>import "myTypes.types"</pre> |
| </div> |
| </div> |
| </li> |
| <li> |
| <p>define new <a href="types.html">types</a> visible only in the interface model.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>An example signature:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>signature myFirstInterface</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Optionally, define local <a href="types.html">types</a>, for instance,</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>types // local to this interface |
| type Command |
| type MyType |
| vector Requests = Command []</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Optionally define</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Commands: synchronous input calls that require a reply possibly with a value. The caller is blocked until the reply is received</p> |
| </li> |
| <li> |
| <p>Signals: asynchronous input calls, no reply is required. The caller is not blocked.</p> |
| </li> |
| <li> |
| <p>Notifications: asynchronous output - not blocking.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>The example below contains all three parts; note that commands start with the type of the return value. Commands may have <span class="maroon"><strong>in</strong></span>, <span class="maroon"><strong>inout</strong></span>, and <span class="maroon"><strong>out</strong></span> parameters. When the direction is not explicitly given <span class="maroon"><strong>in</strong></span> is assumed as default. Signals and notifications can only have <span class="maroon"><strong>in</strong></span> parameters.</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>commands |
| Time CurrentTime ( Status st, string info, out bool error ) |
| string Command (Request req, inout int result) |
| void Null |
| int Reset |
| real Value (in int something) |
| |
| signals |
| start (real val) |
| doIt (in Request req) |
| go |
| |
| notifications |
| myState (Status s) |
| error |
| no</pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
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| </html> |
