WebSVN – HelenOS-doc – Diff – /design/trunk/src/ch_synchronization.xml



      <example>
        <title>Use of <code>condvar_wait_timeout()</code>.</title>
 
        <programlisting language="C"><function>mutex_lock</function>(<varname>mtx</varname>);
while (!<varname>condition</varname>)
        <function>condvar_wait_timeout</function>(<varname>cv</varname>, <varname>mtx</varname>); /* <remark>the condition is true, do something</remark> */
 
<function>mutex_unlock</function>(<varname>mtx</varname>);</programlisting>
      </example>
 
      <para>A thread that causes the condition become true signals this event
      like this:</para>
 
      <example>
        <title>Use of <code>condvar_signal</code>.</title>
 
        <programlisting language="C"><function>mutex_lock</function>(<varname>mtx</varname>);
<varname>condition</varname> = <constant>true</constant>;
<function>condvar_signal</function>(<varname>cv</varname>);  /* <remark>condvar_broadcast(cv);</remark> */
<function>mutex_unlock</function>(<varname>mtx</varname>);</programlisting>
      </example>
 

Subversion Repositories HelenOS-doc

(root)/design/trunk/src/ch_synchronization.xml @ 132 – Rev 86 → 102

Rev 86		Rev 102
Line 334...		Line 334...
334	<example>	334	<example>
335	<title>Use of <code>condvar_wait_timeout()</code>.</title>	335	<title>Use of <code>condvar_wait_timeout()</code>.</title>
336		336
337	<programlisting language="C"><function>mutex_lock</function>(<varname>mtx</varname>);	337	<programlisting language="C"><function>mutex_lock</function>(<varname>mtx</varname>);
338	while (!<varname>condition</varname>)	338	while (!<varname>condition</varname>)
339	<function>condvar_wait_timeout</function>(<varname>cv</varname>, <varname>mtx</varname>);	339	<function>condvar_wait_timeout</function>(<varname>cv</varname>, <varname>mtx</varname>); /* <remark>the condition is true, do something</remark> */
340	/* <remark>the condition is true, do something</remark> */	-
341	<function>mutex_unlock</function>(<varname>mtx</varname>);</programlisting>	340	<function>mutex_unlock</function>(<varname>mtx</varname>);</programlisting>
342	</example>	341	</example>
343		342
344	<para>A thread that causes the condition become true signals this event	343	<para>A thread that causes the condition become true signals this event
345	like this:</para>	344	like this:</para>
346		345
347	<example>	346	<example>
348	<title>Use of <code>condvar_signal</code>.</title>	347	<title>Use of <code>condvar_signal</code>.</title>
349		348
350	<programlisting><function>mutex_lock</function>(<varname>mtx</varname>);	349	<programlisting language="C"><function>mutex_lock</function>(<varname>mtx</varname>);
351	<varname>condition</varname> = <constant>true</constant>;	350	<varname>condition</varname> = <constant>true</constant>;
352	<function>condvar_signal</function>(<varname>cv</varname>); /* <remark>condvar_broadcast(cv);</remark> */	351	<function>condvar_signal</function>(<varname>cv</varname>); /* <remark>condvar_broadcast(cv);</remark> */
353	<function>mutex_unlock</function>(<varname>mtx</varname>);</programlisting>	352	<function>mutex_unlock</function>(<varname>mtx</varname>);</programlisting>
354	</example>	353	</example>
355		354