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Wed Mar 17 00:39:23 2021 UTC (3 years, 7 months ago) by misho
Branches: mpd, MAIN
CVS tags: v5_9p16, v5_9, HEAD
mpd 5.9

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    2: <HTML>
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    4: <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
    5: <TITLE>Hints for developers</TITLE>
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    8: 
    9: <A HREF="mpd.html"><EM>Mpd 5.9 User Manual</EM></A>
   10:  <b>:</b> <A HREF="mpd64.html"><EM>Internals</EM></A>
   11:  <b>:</b> <EM>Hints for developers</EM><BR>
   12: <b>Previous:</b> <A HREF="mpd66.html"><EM>Authentication</EM></A><BR>
   13: <b>Next:</b> <A HREF="mpd68.html"><EM>References</EM></A>
   14: 
   15: 
   16: <HR NOSHADE>
   17:   <H2><A NAME="67"></A>8.3. Hints for developers<A NAME="developer"></A></H2>
   18: <p>This chapter describes describes some hints for developers.</p>
   19: <p>
   20: <dl>
   21: 
   22: <dt><b>Source-Code-Style</b><dd><p>There is not so much to say about that, just take a look at the existing 
   23: source files. <br>
   24: The Tab-Width is eight with an indent of fore. Please make a space between 
   25: operators and operands.</p>
   26: 
   27: <dt><b>NgFuncGetStats</b><dd><p>NEVER call NgFuncGetStats() with the <em>clear</em> parameter set to true, because 
   28: there are other functions (echo requests/replies, bandwidth management) 
   29: wich relies on increasing link-stats. Mpd carries a copy of the netgraph 
   30: link-stats at link-level, just use these instead. You can call 
   31: LinkUpdateStats() for updating the internal stats-struct.</p>
   32: 
   33: <dt><b>New Authentication-Backends</b><dd><p>Authentication backends must run independently from the rest of Mpd, i.e. 
   34: you must not access any Mpd resource, because 
   35: the authentication process is started in its own thread (you have to 
   36: take care about thread-safety). An <code>AuthData</code> object is passed 
   37: to your authenticating function which carries a copy of all required
   38: information. If your backend provides other parameters, like MTU, IP, etc. 
   39: then put these at the appropriate place into <code>AuthData</code> or 
   40: <code>Auth</code>.</p>
   41: <p>If you can not avoid reading from Mpd's internal data, then acquire the 
   42: Giant Mutex:
   43: <hr>
   44: <pre>
   45: [...]
   46:   pthread_mutex_lock(&amp;gGiantMutex);
   47:   [do whatever]
   48:   pthread_mutex_unlock(&amp;gGiantMutex);
   49: [...]
   50: </pre>
   51: <hr>
   52: </p>
   53: 
   54: </dl>
   55: </p>
   56: 
   57: 
   58:  <HR NOSHADE>
   59: <A HREF="mpd.html"><EM>Mpd 5.9 User Manual</EM></A>
   60:  <b>:</b> <A HREF="mpd64.html"><EM>Internals</EM></A>
   61:  <b>:</b> <EM>Hints for developers</EM><BR>
   62: <b>Previous:</b> <A HREF="mpd66.html"><EM>Authentication</EM></A><BR>
   63: <b>Next:</b> <A HREF="mpd68.html"><EM>References</EM></A>
   64: 
   65: 
   66: 
   67: </BODY>
   68: </HTML>
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