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<h2>
<a name="1209326"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">task_lock</font>
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<p>
<a name="1209327"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Prevent task rescheduling</font>
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<a name="1209328"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
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<a name="1209329"> </a><font size=2 face=Courier><strong>#include <task.h><br></strong></font>
<a name="1209330"> </a><font size=2 face=Courier><strong>void task_lock( void );<br></strong></font>
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<a name="1209331"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
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<a name="1209332"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<h3>
<a name="1209334"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Results</font>
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<a name="1209335"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<a name="1209336"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Errors</font>
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<a name="1209337"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<a name="1209338"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
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<p>
<a name="1209339"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">This function prevents the kernel scheduler from preempting or timeslicing the current task, although the task can still be interrupted by interrupt handlers (and high-priority processes on the ST20C2).</font>
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<p>
<a name="1209340"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">This function should always be called as a pair with <font size=2 face=Courier><strong>task_unlock()</strong></font>, so that it can be used to create a critical region in which the task cannot be preempted by another task. If the task deschedules, the lock is terminated. Calls to <font size=2 face=Courier><strong>task_lock()</strong></font> can be nested, and the lock not be released until an equal number of calls to <font size=2 face=Courier><strong>task_unlock()</strong></font> have been made.</font>
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<h3>
<a name="1209341"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Callable from</font>
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<a name="1209342"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Tasks only</font>
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<a name="1209343"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">See also</font>
</h3>
<p>
<a name="1209344"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><a href="libs46.htm#1206908"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>interrupt_lock</i></font></a>, <a href="libs136.htm#1209719"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>task_unlock</i></font></a></font>
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<font size=1 face="Verdana, Arial, Helvetica, sans-serif"> © 2001, 2002, 2003 STMicroelectronics. All Rights Reserved.<br>
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