classpqueuechannel.html

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Low level read from the file channel. The read timeout is ignored for file I/O. The <a class="el" href="classPChannel.html#z49_3">GetLastReadCount()</a> function returns the actual number of bytes read.
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The <a class="el" href="classPChannel.html#z55_2">GetErrorCode()</a> function should be consulted after <a class="el" href="classPQueueChannel.html#z501_0">Read()</a> returns FALSE to determine what caused the failure.
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<dl compact><dt><b>Returns: </b></dt><dd>
 TRUE indicates that at least one character was read from the channel. FALSE means no bytes were read due to timeout or some other I/O error. </dl><dl compact><dt><b>Parameters: </b></dt><dd>
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<tr><td valign=top><em>len</em>&nbsp;</td><td>
Pointer to a block of memory to receive the read bytes. Maximum number of bytes to read into the buffer. </td></tr>
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Reimplemented from <a class="el" href="classPChannel.html#z49_2">PChannel</a>.    </td>
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<a name="z501_1" doxytag="PQueueChannel::Write"></a><p>
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          <td class="md" nowrap valign="top"> virtual BOOL PQueueChannel::Write </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const void *&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>buf</em>, </td>
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          <td class="md" nowrap>PINDEX&nbsp;</td>
          <td class="mdname" nowrap>&nbsp; <em>len</em></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [virtual]</code></td>
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Low level write to the file channel. The write timeout is ignored for file I/O. The <a class="el" href="classPChannel.html#z51_3">GetLastWriteCount()</a> function returns the actual number of bytes written.
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The <a class="el" href="classPChannel.html#z55_2">GetErrorCode()</a> function should be consulted after <a class="el" href="classPQueueChannel.html#z501_1">Write()</a> returns FALSE to determine what caused the failure.
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<dl compact><dt><b>Returns: </b></dt><dd>
TRUE if at least len bytes were written to the channel. </dl><dl compact><dt><b>Parameters: </b></dt><dd>
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Pointer to a block of memory to write. Number of bytes to write. </td></tr>
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Reimplemented from <a class="el" href="classPChannel.html#z51_2">PChannel</a>.    </td>
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<hr><h2>Member Data Documentation</h2>
<a name="n5" doxytag="PQueueChannel::dequeuePos"></a><p>
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          <td class="md" nowrap valign="top"> PINDEX PQueueChannel::dequeuePos<code> [protected]</code>
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<a name="n4" doxytag="PQueueChannel::enqueuePos"></a><p>
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          <td class="md" nowrap valign="top"> PINDEX PQueueChannel::enqueuePos<code> [protected]</code>
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<a name="n0" doxytag="PQueueChannel::mutex"></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="classPMutex.html">PMutex</a> PQueueChannel::mutex<code> [protected]</code>
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<a name="n1" doxytag="PQueueChannel::queueBuffer"></a><p>
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          <td class="md" nowrap valign="top"> BYTE* PQueueChannel::queueBuffer<code> [protected]</code>
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<a name="n3" doxytag="PQueueChannel::queueLength"></a><p>
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          <td class="md" nowrap valign="top"> PINDEX PQueueChannel::queueLength<code> [protected]</code>
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<a name="n2" doxytag="PQueueChannel::queueSize"></a><p>
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          <td class="md" nowrap valign="top"> PINDEX PQueueChannel::queueSize<code> [protected]</code>
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<a name="n6" doxytag="PQueueChannel::unempty"></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="classPSyncPoint.html">PSyncPoint</a> PQueueChannel::unempty<code> [protected]</code>
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<a name="n7" doxytag="PQueueChannel::unfull"></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="classPSyncPoint.html">PSyncPoint</a> PQueueChannel::unfull<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="qchannel_8h-source.html">qchannel.h</a></ul>
<hr><address style="align: right;"><small>Generated on Wed Sep 29 22:44:18 2004 for PWLib by
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