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<h2>
<a name="1206908"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">interrupt_lock</font>
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<p>
<a name="1206909"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Lock all interrupts</font>
</p>
<h3>
<a name="1206910"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
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<a name="1206911"> </a><font size=2 face=Courier><strong>#include <interrup.h><br></strong></font>
<a name="1271116"> </a><font size=2 face=Courier><strong>void interrupt_lock( void );<br></strong></font>
<h3>
<a name="1206912"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
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<a name="1206913"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<h3>
<a name="1206915"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Results</font>
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<a name="1206916"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<h3>
<a name="1206917"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Errors</font>
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<a name="1206918"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<h3>
<a name="1206919"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
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<p>
<a name="1206920"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">This function disables all interrupts to the CPU. This prevents any interrupts from the interrupt controller having any effect on the currently executing task. In addition, on the ST20C2 this also disables high priority processes, channels and timers.</font>
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<p>
<a name="1206921"> </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>interrupt_unlock()</strong></font>, so that it can be used to create a critical region in which the task cannot be preempted by any other task or interrupt. Calls to <font size=2 face=Courier><strong>interrupt_lock()</strong></font> can be nested, and the lock will not be released until an equal number of calls to <font size=2 face=Courier><strong>interrupt_unlock()</strong></font> have been made.</font>
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<p>
<a name="1206922"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">A task must not deschedule while an interrupt lock is in effect. When interrupts are locked calling any function that may not be called by an interrupt service routine is illegal.</font>
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<h3>
<a name="1206923"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Applies to</font>
</h3>
<p>
<a name="1206924"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">ILC-None, ILC-1, ILC-2, ILC-3.</font>
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<h3>
<a name="1206925"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Callable from</font>
</h3>
<p>
<a name="1206926"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">A task, interrupt service routine or a high priority process (on an ST20C2).</font>
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<h3>
<a name="1206927"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">See also</font>
</h3>
<p>
<a name="1206928"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><a href="libs56.htm#1207243"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>interrupt_unlock</i></font></a>, <a href="libs123.htm#1209326"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>task_lock</i></font></a></font>
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