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QMutex
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com.trolltech.qt.core</FONT>
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Class QMutex</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/trolltech/qt/QSignalEmitter.html" title="class in com.trolltech.qt">com.trolltech.qt.QSignalEmitter</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/trolltech/qt/QtJambiObject.html" title="class in com.trolltech.qt">com.trolltech.qt.QtJambiObject</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.trolltech.qt.core.QMutex</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../com/trolltech/qt/QtJambiInterface.html" title="interface in com.trolltech.qt">QtJambiInterface</A></DD>
</DL>
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<DL>
<DT><PRE>public class <B>QMutex</B><DT>extends <A HREF="../../../../com/trolltech/qt/QtJambiObject.html" title="class in com.trolltech.qt">QtJambiObject</A></DL>
</PRE>
<P>
<p>The <a href="QMutex.html#QMutex(com.trolltech.qt.core.QMutex.RecursionMode)"><tt>QMutex</tt></a> class provides access serialization between threads.</p>
<p>The purpose of a <a href="QMutex.html#QMutex(com.trolltech.qt.core.QMutex.RecursionMode)"><tt>QMutex</tt></a> is to protect an object, data structure or section of code so that only one thread can access it at a time (this is similar to the Java <tt>synchronized</tt> keyword). It is usually best to use a mutex with a QMutexLocker since this makes it easy to ensure that locking and unlocking are performed consistently.</p>
<p>For example, say there is a method that prints a message to the user on two lines:</p>
<pre> int number = 6;
void method1()
{
number *= 5;
number /= 4;
}
void method2()
{
number *= 3;
number /= 2;
}</pre>
<p>If these two methods are called in succession, the following happens:</p>
<pre><span class="comment"> // method1()</span>
number *= 5; <span class="comment">// number is now 30</span>
number /= 4; <span class="comment">// number is now 7</span>
<span class="comment"> // method2()</span>
number *= 3; <span class="comment">// number is now 21</span>
number /= 2; <span class="comment">// number is now 10</span></pre>
<p>If these two methods are called simultaneously from two threads then the following sequence could result:</p>
<pre><span class="comment"> // Thread 1 calls method1()</span>
number *= 5; <span class="comment">// number is now 30</span>
<span class="comment"> // Thread 2 calls method2().</span>
<span class="comment"> //</span>
<span class="comment"> // Most likely Thread 1 has been put to sleep by the operating</span>
<span class="comment"> // system to allow Thread 2 to run.</span>
number *= 3; <span class="comment">// number is now 90</span>
number /= 2; <span class="comment">// number is now 45</span>
<span class="comment"> // Thread 1 finishes executing.</span>
number /= 4; <span class="comment">// number is now 11, instead of 10</span></pre>
<p>If we add a mutex, we should get the result we want:</p>
<pre> QMutex mutex;
int number = 6;
void method1()
{
mutex.lock();
number *= 5;
number /= 4;
mutex.unlock();
}
void method2()
{
mutex.lock();
number *= 3;
number /= 2;
mutex.unlock();
}</pre>
<p>Then only one thread can modify <tt>number</tt> at any given time and the result is correct. This is a trivial example, of course, but applies to any other case where things need to happen in a particular sequence.</p>
<p>When you call <a href="QMutex.html#lock()"><tt>lock</tt></a> in a thread, other threads that try to call <a href="QMutex.html#lock()"><tt>lock</tt></a> in the same place will block until the thread that got the lock calls <a href="QMutex.html#unlock()"><tt>unlock</tt></a>. A non-blocking alternative to <a href="QMutex.html#lock()"><tt>lock</tt></a> is <a href="QMutex.html#tryLock(int)"><tt>tryLock</tt></a>.</p>
<P>
<P>
<DL>
<DT><B>See Also:</B><DD><tt>QMutexLocker</tt>,
<a href="%2E%2E/gui/QReadWriteLock.html"><tt>QReadWriteLock</tt></a>,
<a href="QSemaphore.html"><tt>QSemaphore</tt></a>,
<a href="QWaitCondition.html"><tt>QWaitCondition</tt></a></DL>
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<CODE>static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QMutex.RecursionMode.html" title="enum in com.trolltech.qt.core">QMutex.RecursionMode</A></B></CODE>
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Press link for info on QMutex.RecursionMode</TD>
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<TH ALIGN="left"><B>Nested classes/interfaces inherited from class com.trolltech.qt.<A HREF="../../../../com/trolltech/qt/QSignalEmitter.html" title="class in com.trolltech.qt">QSignalEmitter</A></B></TH>
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<TD><CODE><A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal0.html" title="class in com.trolltech.qt">QSignalEmitter.Signal0</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal1.html" title="class in com.trolltech.qt">QSignalEmitter.Signal1</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal1.html" title="type parameter in QSignalEmitter.Signal1">A</A>>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal2.html" title="class in com.trolltech.qt">QSignalEmitter.Signal2</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal2.html" title="type parameter in QSignalEmitter.Signal2">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal2.html" title="type parameter in QSignalEmitter.Signal2">B</A>>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal3.html" title="class in com.trolltech.qt">QSignalEmitter.Signal3</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal3.html" title="type parameter in QSignalEmitter.Signal3">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal3.html" title="type parameter in QSignalEmitter.Signal3">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal3.html" title="type parameter in QSignalEmitter.Signal3">C</A>>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="class in com.trolltech.qt">QSignalEmitter.Signal4</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="type parameter in QSignalEmitter.Signal4">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="type parameter in QSignalEmitter.Signal4">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="type parameter in QSignalEmitter.Signal4">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal4.html" title="type parameter in QSignalEmitter.Signal4">D</A>>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="class in com.trolltech.qt">QSignalEmitter.Signal5</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal5.html" title="type parameter in QSignalEmitter.Signal5">E</A>>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="class in com.trolltech.qt">QSignalEmitter.Signal6</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">E</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal6.html" title="type parameter in QSignalEmitter.Signal6">F</A>>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="class in com.trolltech.qt">QSignalEmitter.Signal7</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">E</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">F</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal7.html" title="type parameter in QSignalEmitter.Signal7">G</A>>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="class in com.trolltech.qt">QSignalEmitter.Signal8</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">E</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">F</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">G</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal8.html" title="type parameter in QSignalEmitter.Signal8">H</A>>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="class in com.trolltech.qt">QSignalEmitter.Signal9</A><<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">A</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">B</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">C</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">D</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">E</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">F</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">G</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">H</A>,<A HREF="../../../../com/trolltech/qt/QSignalEmitter.Signal9.html" title="type parameter in QSignalEmitter.Signal9">I</A>></CODE></TD>
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<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QMutex.html#QMutex()">QMutex</A></B>()</CODE>
<BR>
Equivalent to <a href="QMutex.html#QMutex(com.trolltech.qt.core.QMutex.RecursionMode)"><tt>QMutex</tt></a>(NonRecursive).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QMutex.html#QMutex(com.trolltech.qt.core.QMutex.RecursionMode)">QMutex</A></B>(<A HREF="../../../../com/trolltech/qt/core/QMutex.RecursionMode.html" title="enum in com.trolltech.qt.core">QMutex.RecursionMode</A> mode)</CODE>
<BR>
Constructs a new mutex.</TD>
</TR>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../../com/trolltech/qt/core/QMutex.html" title="class in com.trolltech.qt.core">QMutex</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QMutex.html#fromNativePointer(com.trolltech.qt.QNativePointer)">fromNativePointer</A></B>(<A HREF="../../../../com/trolltech/qt/QNativePointer.html" title="class in com.trolltech.qt">QNativePointer</A> nativePointer)</CODE>
<BR>
This function returns the QMutex instance pointed to by nativePointer</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QMutex.html#lock()">lock</A></B>()</CODE>
<BR>
Locks the mutex.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QMutex.html#tryLock()">tryLock</A></B>()</CODE>
<BR>
Attempts to lock the mutex.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QMutex.html#tryLock(int)">tryLock</A></B>(int timeout)</CODE>
<BR>
Attempts to lock the mutex.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/trolltech/qt/core/QMutex.html#unlock()">unlock</A></B>()</CODE>
<BR>
Unlocks the mutex.</TD>
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<A NAME="methods_inherited_from_class_com.trolltech.qt.QtJambiObject"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TH ALIGN="left"><B>Methods inherited from class com.trolltech.qt.<A HREF="../../../../com/trolltech/qt/QtJambiObject.html" title="class in com.trolltech.qt">QtJambiObject</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../com/trolltech/qt/QtJambiObject.html#dispose()">dispose</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#disposed()">disposed</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#finalize()">finalize</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#reassignNativeResources(com.trolltech.qt.QtJambiObject, java.lang.Class)">reassignNativeResources</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#tr(java.lang.String)">tr</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#tr(java.lang.String, java.lang.String)">tr</A>, <A HREF="../../../../com/trolltech/qt/QtJambiObject.html#tr(java.lang.String, java.lang.String, int)">tr</A></CODE></TD>
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<A NAME="methods_inherited_from_class_com.trolltech.qt.QSignalEmitter"><!-- --></A>
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<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class com.trolltech.qt.<A HREF="../../../../com/trolltech/qt/QSignalEmitter.html" title="class in com.trolltech.qt">QSignalEmitter</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#blockSignals(boolean)">blockSignals</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#disconnect()">disconnect</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#disconnect(java.lang.Object)">disconnect</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#signalsBlocked()">signalsBlocked</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#signalSender()">signalSender</A>, <A HREF="../../../../com/trolltech/qt/QSignalEmitter.html#thread()">thread</A></CODE></TD>
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<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_com.trolltech.qt.QtJambiInterface"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from interface com.trolltech.qt.<A HREF="../../../../com/trolltech/qt/QtJambiInterface.html" title="interface in com.trolltech.qt">QtJambiInterface</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#disableGarbageCollection()">disableGarbageCollection</A>, <A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#nativeId()">nativeId</A>, <A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#nativePointer()">nativePointer</A>, <A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#reenableGarbageCollection()">reenableGarbageCollection</A>, <A HREF="../../../../com/trolltech/qt/QtJambiInterface.html#setJavaOwnership()">setJavaOwnership</A></CODE></TD>
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<A NAME="QMutex()"><!-- --></A><H3>
QMutex</H3>
<PRE>
public <B>QMutex</B>()</PRE>
<DL>
<DD><p>Equivalent to <a href="QMutex.html#QMutex(com.trolltech.qt.core.QMutex.RecursionMode)"><tt>QMutex</tt></a>(NonRecursive).
<P>
</DL>
<HR>
<A NAME="QMutex(com.trolltech.qt.core.QMutex.RecursionMode)"><!-- --></A><H3>
QMutex</H3>
<PRE>
public <B>QMutex</B>(<A HREF="../../../../com/trolltech/qt/core/QMutex.RecursionMode.html" title="enum in com.trolltech.qt.core">QMutex.RecursionMode</A> mode)</PRE>
<DL>
<DD><p>Constructs a new mutex. The mutex is created in an unlocked state.</p>
<p>If <tt>mode</tt> is QMutex::Recursive, a thread can lock the same mutex multiple times and the mutex won't be unlocked until a corresponding number of <a href="QMutex.html#unlock()"><tt>unlock</tt></a> calls have been made. The default is QMutex::NonRecursive.</p>
<P>
<DL>
<DT><B>See Also:</B><DD><a href="QMutex.html#lock()"><tt>lock</tt></a>,
<a href="QMutex.html#unlock()"><tt>unlock</tt></a></DL>
</DL>
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<A NAME="lock()"><!-- --></A><H3>
lock</H3>
<PRE>
public final void <B>lock</B>()</PRE>
<DL>
<DD><p>Locks the mutex. If another thread has locked the mutex then this call will block until that thread has unlocked it.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QMutex.html#unlock()"><tt>unlock</tt></a></DL>
</DD>
</DL>
<HR>
<A NAME="tryLock()"><!-- --></A><H3>
tryLock</H3>
<PRE>
public final boolean <B>tryLock</B>()</PRE>
<DL>
<DD><p>Attempts to lock the mutex. If the lock was obtained, this function returns true. If another thread has locked the mutex, this function returns false immediately.</p>
<p>If the lock was obtained, the mutex must be unlocked with <a href="QMutex.html#unlock()"><tt>unlock</tt></a> before another thread can successfully lock it.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QMutex.html#lock()"><tt>lock</tt></a>,
<a href="QMutex.html#unlock()"><tt>unlock</tt></a></DL>
</DD>
</DL>
<HR>
<A NAME="tryLock(int)"><!-- --></A><H3>
tryLock</H3>
<PRE>
public final boolean <B>tryLock</B>(int timeout)</PRE>
<DL>
<DD><p>Attempts to lock the mutex. This function returns true if the lock was obtained; otherwise it returns false. If another thread has locked the mutex, this function will wait for at most <tt>timeout</tt> milliseconds for the mutex to become available.</p>
<p>Note: Passing a negative number as the <tt>timeout</tt> is equivalent to calling <a href="QMutex.html#lock()"><tt>lock</tt></a>, i.e. this function will wait forever until mutex can be locked if <tt>timeout</tt> is negative.</p>
<p>If the lock was obtained, the mutex must be unlocked with <a href="QMutex.html#unlock()"><tt>unlock</tt></a> before another thread can successfully lock it.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QMutex.html#lock()"><tt>lock</tt></a>,
<a href="QMutex.html#unlock()"><tt>unlock</tt></a></DL>
</DD>
</DL>
<HR>
<A NAME="unlock()"><!-- --></A><H3>
unlock</H3>
<PRE>
public final void <B>unlock</B>()</PRE>
<DL>
<DD><p>Unlocks the mutex. Attempting to unlock a mutex in a different thread to the one that locked it results in an error. Unlocking a mutex that is not locked results in undefined behavior.</p>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><a href="QMutex.html#lock()"><tt>lock</tt></a></DL>
</DD>
</DL>
<HR>
<A NAME="fromNativePointer(com.trolltech.qt.QNativePointer)"><!-- --></A><H3>
fromNativePointer</H3>
<PRE>
public static <A HREF="../../../../com/trolltech/qt/core/QMutex.html" title="class in com.trolltech.qt.core">QMutex</A> <B>fromNativePointer</B>(<A HREF="../../../../com/trolltech/qt/QNativePointer.html" title="class in com.trolltech.qt">QNativePointer</A> nativePointer)</PRE>
<DL>
<DD>This function returns the QMutex instance pointed to by nativePointer
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>nativePointer</CODE> - the QNativePointer of which object should be returned.</DL>
</DD>
</DL>
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