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<p class=MsoNormal>Hello,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have a custom module, that exports foo(), the problem is
that foo() is not safe-thread, i.e. calls to it should be serialized.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I tried to do it with ast_mutex like following:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>AST_MUTEX_DEFINE_STATIC(mp);<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>static int foo(…..)<o:p></o:p></p>
<p class=MsoNormal>{<o:p></o:p></p>
<p class=MsoNormal>….<o:p></o:p></p>
<p class=MsoNormal>ast_mutex_lock(&mp);<o:p></o:p></p>
<p class=MsoNormal>[non-reentrant code here]<o:p></o:p></p>
<p class=MsoNormal>ast_mutex_unlock(&mp);<o:p></o:p></p>
<p class=MsoNormal>…..<o:p></o:p></p>
<p class=MsoNormal>}<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>But I still see that [non-reentrant] part is entered
more than once concurrently. Each channel can call foo() only once in dialplan,
so it looks like other threads/channels are entering it.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Do I miss something please? Maybe there’re a better
ways to serialize a calls to module function?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>--<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Best
Regards,</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Alex
Massover</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>VoIP
R&D TL</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Jajah
Inc.</span><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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