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  <a name="1204431"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">16.2 	 Concurrency support</font>
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  <a name="1209860"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">The debugger can only service one request at a time and so only one debug function can be executing at any time. To prevent multiple debug functions executing simultaneously, for example from different concurrent threads of execution, each debug function immediately returns with the value <font size=2 face=Courier><strong>DEBUG_FN_REENTERED</strong></font> if it detects that another debug function is already running.</font>
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  <a name="1204433"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">To use the debug functions in a concurrent environment, a function pointer can be registered with the debug library that ensures exclusion. This is done using the function <font size=2 face=Courier><strong>debugsetmutexfn</strong></font> which is described in <a href="libsdeb7.htm#1204631"><font  color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Section

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