classpsemaphore.html

pwlib开发文档

          <td class="md" nowrap valign="top">ThreadQueue&nbsp;</td>
          <td class="mdname" nowrap>&nbsp;, </td>
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          <td class="md" nowrap><a class="el" href="classPThread.html">PThread</a>&nbsp;</td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [protected]</code></td>
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<a name="z347_2" doxytag="PSemaphore::Signal"></a><p>
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          <td class="md" nowrap valign="top"> virtual void PSemaphore::Signal </td>
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          <td class="md" nowrap><code> [virtual]</code></td>
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If there are waiting (blocked) threads then unblock the first one that was blocked. If no waiting threads and the count is less than the maximum then increment the semaphore. 
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Reimplemented in <a class="el" href="classPSyncPointAck.html#a0">PSyncPointAck</a>, and <a class="el" href="classPCondMutex.html#a1">PCondMutex</a>.    </td>
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<a name="z347_1" doxytag="PSemaphore::Wait"></a><p>
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          <td class="md" nowrap valign="top"> virtual BOOL PSemaphore::Wait </td>
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          <td class="md" nowrap valign="top">const <a class="el" href="classPTimeInterval.html">PTimeInterval</a> &amp;&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>&nbsp; <em>timeout</em>          </td>
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If the semaphore count is &gt; 0, decrement the semaphore and return. If if is = 0 then wait (block) for the specified amount of time.
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<dl compact><dt><b>Returns: </b></dt><dd>
 TRUE if semaphore was signalled, FALSE if timed out. </dl>    </td>
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<a name="z347_0" doxytag="PSemaphore::Wait"></a><p>
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          <td class="md" nowrap valign="top"> virtual void PSemaphore::Wait </td>
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          <td class="md" nowrap><code> [virtual]</code></td>
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If the semaphore count is &gt; 0, decrement the semaphore and return. If if is = 0 then wait (block).     </td>
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<a name="z347_3" doxytag="PSemaphore::WillBlock"></a><p>
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          <td class="md" nowrap valign="top"> virtual BOOL PSemaphore::WillBlock </td>
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          <td class="mdname1" valign="top" nowrap>&nbsp;          </td>
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          <td class="md" nowrap><code> [virtual]</code></td>
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Determine if the semaphore would block if the <a class="el" href="classPSemaphore.html#z347_0">Wait()</a># function were called.
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<dl compact><dt><b>Returns: </b></dt><dd>
 TRUE if semaphore will block when <a class="el" href="classPSemaphore.html#z347_0">Wait()</a> is called. </dl>    </td>
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<hr><h2>Member Data Documentation</h2>
<a name="n0" doxytag="PSemaphore::initialVar"></a><p>
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          <td class="md" nowrap valign="top"> unsigned PSemaphore::initialVar<code> [protected]</code>
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<a name="n1" doxytag="PSemaphore::maxCountVar"></a><p>
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          <td class="md" nowrap valign="top"> unsigned PSemaphore::maxCountVar<code> [protected]</code>
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<a name="n2" doxytag="PSemaphore::waitQueue"></a><p>
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          <td class="md" nowrap valign="top"> ThreadQueue PSemaphore::waitQueue<code> [protected]</code>
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<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="semaphor_8h-source.html">semaphor.h</a></ul>
<hr><address style="align: right;"><small>Generated on Wed Sep 29 22:44:19 2004 for PWLib by
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