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<h1>Poll Routines<br>
<small>
[<a class="el" href="group__APR.html">Apache Portability Runtime library</a>]</small>
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<tr><td colspan="2"><br><h2>Data Structures</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">union </td><td class="memItemRight" valign="bottom"><a class="el" href="unionapr__descriptor.html">apr_descriptor</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a></td></tr>
<tr><td colspan="2"><br><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga8">APR_POLLIN</a> 0x001</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga9">APR_POLLPRI</a> 0x002</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga10">APR_POLLOUT</a> 0x004</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga11">APR_POLLERR</a> 0x010</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga12">APR_POLLHUP</a> 0x020</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga13">APR_POLLNVAL</a> 0x040</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga14">APR_POLLSET_THREADSAFE</a> 0x001</td></tr>
<tr><td colspan="2"><br><h2>Typedefs</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga0">apr_pollfd_t</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a></td></tr>
<tr><td colspan="2"><br><h2>Enumerations</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga15">apr_datatype_e</a> { <a class="el" href="group__apr__poll.html#gga15a9">APR_NO_DESC</a>,
<a class="el" href="group__apr__poll.html#gga15a10">APR_POLL_SOCKET</a>,
<a class="el" href="group__apr__poll.html#gga15a11">APR_POLL_FILE</a>,
<a class="el" href="group__apr__poll.html#gga15a12">APR_POLL_LASTDESC</a>
}</td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga2">apr_pollset_create</a> (<a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> **pollset, apr_uint32_t size, <a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a> *p, apr_uint32_t flags)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga3">apr_pollset_destroy</a> (<a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> *pollset)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga4">apr_pollset_add</a> (<a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> *pollset, const <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> *descriptor)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga5">apr_pollset_remove</a> (<a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> *pollset, const <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> *descriptor)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga6">apr_pollset_poll</a> (<a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> *pollset, <a class="el" href="group__apr__time.html#ga3">apr_interval_time_t</a> timeout, apr_int32_t *num, const <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> **descriptors)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__poll.html#ga7">apr_poll</a> (<a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> *aprset, apr_int32_t numsock, apr_int32_t *nsds, <a class="el" href="group__apr__time.html#ga3">apr_interval_time_t</a> timeout)</td></tr>
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<hr><h2>Define Documentation</h2>
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<td class="md" nowrap valign="top">#define APR_POLLERR 0x010 </td>
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Pending error </td>
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<td class="md" nowrap valign="top">#define APR_POLLHUP 0x020 </td>
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Hangup occurred </td>
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<a class="anchor" name="ga8" doxytag="apr_poll.h::APR_POLLIN"></a><p>
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<td class="md" nowrap valign="top">#define APR_POLLIN 0x001 </td>
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Can read without blocking </td>
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<a class="anchor" name="ga13" doxytag="apr_poll.h::APR_POLLNVAL"></a><p>
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<td class="md" nowrap valign="top">#define APR_POLLNVAL 0x040 </td>
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Descriptior invalid </td>
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<a class="anchor" name="ga10" doxytag="apr_poll.h::APR_POLLOUT"></a><p>
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<td class="md" nowrap valign="top">#define APR_POLLOUT 0x004 </td>
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Can write without blocking </td>
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<a class="anchor" name="ga9" doxytag="apr_poll.h::APR_POLLPRI"></a><p>
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<td class="md" nowrap valign="top">#define APR_POLLPRI 0x002 </td>
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Priority data available </td>
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<a class="anchor" name="ga14" doxytag="apr_poll.h::APR_POLLSET_THREADSAFE"></a><p>
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<td class="md" nowrap valign="top">#define APR_POLLSET_THREADSAFE 0x001 </td>
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Adding or Removing a Descriptor is thread safe </td>
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<hr><h2>Typedef Documentation</h2>
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<td class="md" nowrap valign="top">typedef struct <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> </td>
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<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> </dd></dl>
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<a class="anchor" name="ga1" doxytag="apr_poll.h::apr_pollset_t"></a><p>
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<td class="md" nowrap valign="top">typedef struct <a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> <a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> </td>
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Opaque structure used for pollset API </td>
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<hr><h2>Enumeration Type Documentation</h2>
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<td class="md" nowrap valign="top">enum <a class="el" href="group__apr__poll.html#ga15">apr_datatype_e</a> </td>
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Used in <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> to determine what the <a class="el" href="unionapr__descriptor.html">apr_descriptor</a> is <dl compact><dt><b>Enumeration values: </b></dt><dd>
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<tr><td valign="top"><em><a class="anchor" name="gga15a9" doxytag="APR_NO_DESC"></a>APR_NO_DESC</em> </td><td>
nothing here </td></tr>
<tr><td valign="top"><em><a class="anchor" name="gga15a10" doxytag="APR_POLL_SOCKET"></a>APR_POLL_SOCKET</em> </td><td>
descriptor refers to a socket </td></tr>
<tr><td valign="top"><em><a class="anchor" name="gga15a11" doxytag="APR_POLL_FILE"></a>APR_POLL_FILE</em> </td><td>
descriptor refers to a file </td></tr>
<tr><td valign="top"><em><a class="anchor" name="gga15a12" doxytag="APR_POLL_LASTDESC"></a>APR_POLL_LASTDESC</em> </td><td>
descriptor is the last one in the list </td></tr>
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<hr><h2>Function Documentation</h2>
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<td class="md" nowrap valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> apr_poll </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> * </td>
<td class="mdname" nowrap> <em>aprset</em>, </td>
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<td class="md" nowrap>apr_int32_t </td>
<td class="mdname" nowrap> <em>numsock</em>, </td>
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<td class="mdname" nowrap> <em>nsds</em>, </td>
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<td class="md" nowrap><a class="el" href="group__apr__time.html#ga3">apr_interval_time_t</a> </td>
<td class="mdname" nowrap> <em>timeout</em></td>
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<td class="md">) </td>
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Poll the sockets in the poll structure <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>aprset</em> </td><td>The poll structure we will be using. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>numsock</em> </td><td>The number of sockets we are polling </td></tr>
<tr><td valign="top"></td><td valign="top"><em>nsds</em> </td><td>The number of sockets signalled. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>timeout</em> </td><td>The amount of time in microseconds to wait. This is a maximum, not a minimum. If a socket is signalled, we will wake up before this time. A negative number means wait until a socket is signalled. </td></tr>
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<dl compact><dt><b>Remarks:</b></dt><dd>The number of sockets signalled is returned in the third argument. This is a blocking call, and it will not return until either a socket has been signalled, or the timeout has expired. </dd></dl>
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<td class="md" nowrap valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> apr_pollset_add </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> * </td>
<td class="mdname" nowrap> <em>pollset</em>, </td>
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<td class="mdname" nowrap> <em>descriptor</em></td>
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Add a socket or file descriptor to a pollset <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>pollset</em> </td><td>The pollset to which to add the descriptor </td></tr>
<tr><td valign="top"></td><td valign="top"><em>descriptor</em> </td><td>The descriptor to add </td></tr>
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<dl compact><dt><b>Remarks:</b></dt><dd>If you set client_data in the descriptor, that value will be returned in the client_data field whenever this descriptor is signalled in <a class="el" href="group__apr__poll.html#ga6">apr_pollset_poll()</a>. </dd></dl>
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<a class="anchor" name="ga2" doxytag="apr_poll.h::apr_pollset_create"></a><p>
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<td class="md" nowrap valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> apr_pollset_create </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> ** </td>
<td class="mdname" nowrap> <em>pollset</em>, </td>
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<td class="md" nowrap><a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a> * </td>
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Setup a pollset object <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>pollset</em> </td><td>The pointer in which to return the newly created object </td></tr>
<tr><td valign="top"></td><td valign="top"><em>size</em> </td><td>The maximum number of descriptors that this pollset can hold </td></tr>
<tr><td valign="top"></td><td valign="top"><em>p</em> </td><td>The pool from which to allocate the pollset </td></tr>
<tr><td valign="top"></td><td valign="top"><em>flags</em> </td><td>Optional flags to modify the operation of the pollset.</td></tr>
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<dl compact><dt><b>Remarks:</b></dt><dd>If flags equals APR_POLLSET_THREADSAFE, then a pollset is created on which it is safe to make concurrent calls to <a class="el" href="group__apr__poll.html#ga4">apr_pollset_add()</a>, <a class="el" href="group__apr__poll.html#ga5">apr_pollset_remove()</a> and <a class="el" href="group__apr__poll.html#ga6">apr_pollset_poll()</a> from separate threads. This feature is only supported on some platforms; the <a class="el" href="group__apr__poll.html#ga2">apr_pollset_create()</a> call will fail with APR_ENOTIMPL on platforms where it is not supported. </dd></dl>
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<a class="anchor" name="ga3" doxytag="apr_poll.h::apr_pollset_destroy"></a><p>
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<td class="md" nowrap valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> apr_pollset_destroy </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> * </td>
<td class="mdname1" valign="top" nowrap> <em>pollset</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
</tr>
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</td>
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</table>
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<tr>
<td>
</td>
<td>
<p>
Destroy a pollset object <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>pollset</em> </td><td>The pollset to destroy </td></tr>
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</dl>
</td>
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<a class="anchor" name="ga6" doxytag="apr_poll.h::apr_pollset_poll"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
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<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> apr_pollset_poll </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> * </td>
<td class="mdname" nowrap> <em>pollset</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap><a class="el" href="group__apr__time.html#ga3">apr_interval_time_t</a> </td>
<td class="mdname" nowrap> <em>timeout</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>apr_int32_t * </td>
<td class="mdname" nowrap> <em>num</em>, </td>
</tr>
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<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> ** </td>
<td class="mdname" nowrap> <em>descriptors</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
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</tr>
</table>
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<td>
</td>
<td>
<p>
Block for activity on the descriptor(s) in a pollset <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pollset</em> </td><td>The pollset to use </td></tr>
<tr><td valign="top"></td><td valign="top"><em>timeout</em> </td><td>Timeout in microseconds </td></tr>
<tr><td valign="top"></td><td valign="top"><em>num</em> </td><td>Number of signalled descriptors (output parameter) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>descriptors</em> </td><td>Array of signalled descriptors (output parameter) </td></tr>
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</dl>
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<a class="anchor" name="ga5" doxytag="apr_poll.h::apr_pollset_remove"></a><p>
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<td class="md" nowrap valign="top"><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> apr_pollset_remove </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__apr__poll.html#ga1">apr_pollset_t</a> * </td>
<td class="mdname" nowrap> <em>pollset</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const <a class="el" href="structapr__pollfd__t.html">apr_pollfd_t</a> * </td>
<td class="mdname" nowrap> <em>descriptor</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
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</td>
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<td>
<p>
Remove a descriptor from a pollset <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pollset</em> </td><td>The pollset from which to remove the descriptor </td></tr>
<tr><td valign="top"></td><td valign="top"><em>descriptor</em> </td><td>The descriptor to remove </td></tr>
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</dl>
</td>
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</table>
<hr size="1"><address style="align: right;"><small>Generated on Sun Mar 20 19:52:27 2005 for Apache Portable Runtime by
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