diff options
| author | Martin Lucina <martin@lucina.net> | 2012-05-20 11:24:59 +0200 |
|---|---|---|
| committer | Martin Lucina <martin@lucina.net> | 2012-05-20 11:24:59 +0200 |
| commit | 56619463ac26dc6c3e576d2fbf6b544eebeb5148 (patch) | |
| tree | f23e0eed3e7d347e71e5a6b4f983692bdec2078d /doc/zmq_getsockopt.html | |
| parent | 4016b657973bba87caf75168ba70aaa85d556487 (diff) | |
Imported Upstream version 2.2.0upstream
Diffstat (limited to 'doc/zmq_getsockopt.html')
| -rw-r--r-- | doc/zmq_getsockopt.html | 343 |
1 files changed, 258 insertions, 85 deletions
diff --git a/doc/zmq_getsockopt.html b/doc/zmq_getsockopt.html index 18c64b1..f726b0b 100644 --- a/doc/zmq_getsockopt.html +++ b/doc/zmq_getsockopt.html @@ -2,15 +2,28 @@ "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<title>zmq_getsockopt(3)</title>
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<div id="header">
<h1>
zmq_getsockopt(3) Manual Page
@@ -580,10 +596,13 @@ zmq_getsockopt(3) Manual Page </div>
</div>
<div id="content">
+<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="paragraph"><p><strong>int zmq_getsockopt (void <em>*socket</em>, int <em>option_name</em>, void <em>*option_value</em>, size_t <em>*option_len</em>);</strong></p></div>
</div>
+</div>
+<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>The <em>zmq_getsockopt()</em> function shall retrieve the value for the option
@@ -594,7 +613,8 @@ to by <em>option_value</em>; upon successful completion <em>zmq_getsockopt()</em modify the <em>option_len</em> argument to indicate the actual size of the option
value stored in the buffer.</p></div>
<div class="paragraph"><p>The following options can be retrieved with the <em>zmq_getsockopt()</em> function:</p></div>
-<h3 id="_zmq_type_retrieve_socket_type">ZMQ_TYPE: Retrieve socket type</h3><div style="clear:left"></div>
+<div class="sect2">
+<h3 id="_zmq_type_retrieve_socket_type">ZMQ_TYPE: Retrieve socket type</h3>
<div class="paragraph"><p>The <em>ZMQ_TYPE</em> option shall retrieve the socket type for the specified
<em>socket</em>. The socket type is specified at socket creation time and
cannot be modified afterwards.</p></div>
@@ -644,7 +664,9 @@ all </td>
</tr>
</table></div>
-<h3 id="_zmq_rcvmore_more_message_parts_to_follow">ZMQ_RCVMORE: More message parts to follow</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvmore_more_message_parts_to_follow">ZMQ_RCVMORE: More message parts to follow</h3>
<div class="paragraph"><p>The <em>ZMQ_RCVMORE</em> option shall return a boolean value indicating if the
multi-part message currently being read from the specified <em>socket</em> has more
message parts to follow. If there are no message parts to follow or if the
@@ -698,7 +720,9 @@ all </td>
</tr>
</table></div>
-<h3 id="_zmq_hwm_retrieve_high_water_mark">ZMQ_HWM: Retrieve high water mark</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_hwm_retrieve_high_water_mark">ZMQ_HWM: Retrieve high water mark</h3>
<div class="paragraph"><p>The <em>ZMQ_HWM</em> option shall retrieve the high water mark for the specified
<em>socket</em>. The high water mark is a hard limit on the maximum number of
outstanding messages ØMQ shall queue in memory for any single peer that the
@@ -755,7 +779,117 @@ all </td>
</tr>
</table></div>
-<h3 id="_zmq_swap_retrieve_disk_offload_size">ZMQ_SWAP: Retrieve disk offload size</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvtimeo_maximum_time_before_a_socket_operation_returns_with_eagain">ZMQ_RCVTIMEO: Maximum time before a socket operation returns with EAGAIN</h3>
+<div class="paragraph"><p>Retrieve the timeout for recv operation on the socket. If the value is <tt>0</tt>,
+<em>zmq_recv(3)</em> will return immediately, with a EAGAIN error if there is no
+message to receive. If the value is <tt>-1</tt>, it will block until a message is
+available. For all other values, it will wait for a message for that amount
+of time before returning with an EAGAIN error.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (infinite)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_sndtimeo_maximum_time_before_a_socket_operation_returns_with_eagain">ZMQ_SNDTIMEO: Maximum time before a socket operation returns with EAGAIN</h3>
+<div class="paragraph"><p>Retrieve the timeout for send operation on the socket. If the value is <tt>0</tt>,
+<em>zmq_send(3)</em> will return immediately, with a EAGAIN error if the message
+cannot be sent. If the value is <tt>-1</tt>, it will block until the message is sent.
+For all other values, it will try to send the message for that amount of time
+before returning with an EAGAIN error.</p></div>
+<div class="hdlist"><table>
+<tr>
+<td class="hdlist1">
+Option value type
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+int
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Option value unit
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+milliseconds
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Default value
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+-1 (infinite)
+</p>
+</td>
+</tr>
+<tr>
+<td class="hdlist1">
+Applicable socket types
+<br />
+</td>
+<td class="hdlist2">
+<p style="margin-top: 0;">
+all
+</p>
+</td>
+</tr>
+</table></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_swap_retrieve_disk_offload_size">ZMQ_SWAP: Retrieve disk offload size</h3>
<div class="paragraph"><p>The <em>ZMQ_SWAP</em> option shall retrieve the disk offload (swap) size for the
specified <em>socket</em>. A socket which has <em>ZMQ_SWAP</em> set to a non-zero value may
exceed its high water mark; in this case outstanding messages shall be
@@ -807,7 +941,9 @@ all </td>
</tr>
</table></div>
-<h3 id="_zmq_affinity_retrieve_i_o_thread_affinity">ZMQ_AFFINITY: Retrieve I/O thread affinity</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_affinity_retrieve_i_o_thread_affinity">ZMQ_AFFINITY: Retrieve I/O thread affinity</h3>
<div class="paragraph"><p>The <em>ZMQ_AFFINITY</em> option shall retrieve the I/O thread affinity for newly
created connections on the specified <em>socket</em>.</p></div>
<div class="paragraph"><p>Affinity determines which threads from the ØMQ I/O thread pool associated with
@@ -865,7 +1001,9 @@ N/A </td>
</tr>
</table></div>
-<h3 id="_zmq_identity_retrieve_socket_identity">ZMQ_IDENTITY: Retrieve socket identity</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_identity_retrieve_socket_identity">ZMQ_IDENTITY: Retrieve socket identity</h3>
<div class="paragraph"><p>The <em>ZMQ_IDENTITY</em> option shall retrieve the identity of the specified
<em>socket</em>. Socket identity determines if existing ØMQ infrastructure (<em>message
queues</em>, <em>forwarding devices</em>) shall be identified with a specific application
@@ -923,7 +1061,9 @@ all </td>
</tr>
</table></div>
-<h3 id="_zmq_rate_retrieve_multicast_data_rate">ZMQ_RATE: Retrieve multicast data rate</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rate_retrieve_multicast_data_rate">ZMQ_RATE: Retrieve multicast data rate</h3>
<div class="paragraph"><p>The <em>ZMQ_RATE</em> option shall retrieve the maximum send or receive data rate for
multicast transports using the specified <em>socket</em>.</p></div>
<div class="hdlist"><table>
@@ -972,7 +1112,9 @@ all, when using multicast transports </td>
</tr>
</table></div>
-<h3 id="_zmq_recovery_ivl_get_multicast_recovery_interval">ZMQ_RECOVERY_IVL: Get multicast recovery interval</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_recovery_ivl_get_multicast_recovery_interval">ZMQ_RECOVERY_IVL: Get multicast recovery interval</h3>
<div class="paragraph"><p>The <em>ZMQ_RECOVERY_IVL</em> option shall retrieve the recovery interval for
multicast transports using the specified <em>socket</em>. The recovery interval
determines the maximum time in seconds that a receiver can be absent from a
@@ -1023,7 +1165,9 @@ all, when using multicast transports </td>
</tr>
</table></div>
-<h3 id="_zmq_recovery_ivl_msec_get_multicast_recovery_interval_in_milliseconds">ZMQ_RECOVERY_IVL_MSEC: Get multicast recovery interval in milliseconds</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_recovery_ivl_msec_get_multicast_recovery_interval_in_milliseconds">ZMQ_RECOVERY_IVL_MSEC: Get multicast recovery interval in milliseconds</h3>
<div class="paragraph"><p>The <em>ZMQ_RECOVERY_IVL’_MSEC option shall retrieve the recovery interval, in
milliseconds, for multicast transports using the specified 'socket</em>. The
recovery interval determines the maximum time in seconds that a receiver
@@ -1079,7 +1223,9 @@ all, when using multicast transports </td>
</tr>
</table></div>
-<h3 id="_zmq_mcast_loop_control_multicast_loop_back">ZMQ_MCAST_LOOP: Control multicast loop-back</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_mcast_loop_control_multicast_loop_back">ZMQ_MCAST_LOOP: Control multicast loop-back</h3>
<div class="paragraph"><p>The <em>ZMQ_MCAST_LOOP</em> option controls whether data sent via multicast
transports can also be received by the sending host via loop-back. A value of
zero indicates that the loop-back functionality is disabled, while the default
@@ -1133,7 +1279,9 @@ all, when using multicast transports </td>
</tr>
</table></div>
-<h3 id="_zmq_sndbuf_retrieve_kernel_transmit_buffer_size">ZMQ_SNDBUF: Retrieve kernel transmit buffer size</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_sndbuf_retrieve_kernel_transmit_buffer_size">ZMQ_SNDBUF: Retrieve kernel transmit buffer size</h3>
<div class="paragraph"><p>The <em>ZMQ_SNDBUF</em> option shall retrieve the underlying kernel transmit buffer
size for the specified <em>socket</em>. A value of zero means that the OS default is
in effect. For details refer to your operating system documentation for the
@@ -1184,7 +1332,9 @@ all </td>
</tr>
</table></div>
-<h3 id="_zmq_rcvbuf_retrieve_kernel_receive_buffer_size">ZMQ_RCVBUF: Retrieve kernel receive buffer size</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_rcvbuf_retrieve_kernel_receive_buffer_size">ZMQ_RCVBUF: Retrieve kernel receive buffer size</h3>
<div class="paragraph"><p>The <em>ZMQ_RCVBUF</em> option shall retrieve the underlying kernel receive buffer
size for the specified <em>socket</em>. A value of zero means that the OS default is
in effect. For details refer to your operating system documentation for the
@@ -1235,7 +1385,9 @@ all </td>
</tr>
</table></div>
-<h3 id="_zmq_linger_retrieve_linger_period_for_socket_shutdown">ZMQ_LINGER: Retrieve linger period for socket shutdown</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_linger_retrieve_linger_period_for_socket_shutdown">ZMQ_LINGER: Retrieve linger period for socket shutdown</h3>
<div class="paragraph"><p>The <em>ZMQ_LINGER</em> option shall retrieve the linger period for the specified
<em>socket</em>. The linger period determines how long pending messages which have
yet to be sent to a peer shall linger in memory after a socket is closed with
@@ -1313,7 +1465,9 @@ all </table></div>
</li>
</ul></div>
-<h3 id="_zmq_reconnect_ivl_retrieve_reconnection_interval">ZMQ_RECONNECT_IVL: Retrieve reconnection interval</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_reconnect_ivl_retrieve_reconnection_interval">ZMQ_RECONNECT_IVL: Retrieve reconnection interval</h3>
<div class="paragraph"><p>The <em>ZMQ_RECONNECT_IVL</em> option shall retrieve the initial reconnection interval
for the specified <em>socket</em>. The reconnection interval is the period ØMQ shall
wait between attempts to reconnect disconnected peers when using
@@ -1373,7 +1527,9 @@ all, only for connection-oriented transports </td>
</tr>
</table></div>
-<h3 id="_zmq_reconnect_ivl_max_retrieve_maximum_reconnection_interval">ZMQ_RECONNECT_IVL_MAX: Retrieve maximum reconnection interval</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_reconnect_ivl_max_retrieve_maximum_reconnection_interval">ZMQ_RECONNECT_IVL_MAX: Retrieve maximum reconnection interval</h3>
<div class="paragraph"><p>The <em>ZMQ_RECONNECT_IVL_MAX</em> option shall retrieve the maximum reconnection
interval for the specified <em>socket</em>. This is the maximum period ØMQ shall wait
between attempts to reconnect. On each reconnect attempt, the previous interval
@@ -1434,7 +1590,9 @@ all, only for connection-oriented transport </td>
</tr>
</table></div>
-<h3 id="_zmq_backlog_retrieve_maximum_length_of_the_queue_of_outstanding_connections">ZMQ_BACKLOG: Retrieve maximum length of the queue of outstanding connections</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_backlog_retrieve_maximum_length_of_the_queue_of_outstanding_connections">ZMQ_BACKLOG: Retrieve maximum length of the queue of outstanding connections</h3>
<div class="paragraph"><p>The <em>ZMQ_BACKLOG</em> option shall retrieve the maximum length of the queue of
outstanding peer connections for the specified <em>socket</em>; this only applies to
connection-oriented transports. For details refer to your operating system
@@ -1485,7 +1643,9 @@ all, only for connection-oriented transports </td>
</tr>
</table></div>
-<h3 id="_zmq_fd_retrieve_file_descriptor_associated_with_the_socket">ZMQ_FD: Retrieve file descriptor associated with the socket</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_fd_retrieve_file_descriptor_associated_with_the_socket">ZMQ_FD: Retrieve file descriptor associated with the socket</h3>
<div class="paragraph"><p>The <em>ZMQ_FD</em> option shall retrieve the file descriptor associated with the
specified <em>socket</em>. The returned file descriptor can be used to integrate the
socket into an existing event loop; the ØMQ library shall signal any pending
@@ -1558,7 +1718,9 @@ all </td>
</tr>
</table></div>
-<h3 id="_zmq_events_retrieve_socket_event_state">ZMQ_EVENTS: Retrieve socket event state</h3><div style="clear:left"></div>
+</div>
+<div class="sect2">
+<h3 id="_zmq_events_retrieve_socket_event_state">ZMQ_EVENTS: Retrieve socket event state</h3>
<div class="paragraph"><p>The <em>ZMQ_EVENTS</em> option shall retrieve the event state for the specified
<em>socket</em>. The returned value is a bit mask constructed by OR’ing a combination
of the following event flags:</p></div>
@@ -1633,11 +1795,16 @@ all </tr>
</table></div>
</div>
+</div>
+</div>
+<div class="sect1">
<h2 id="_return_value">RETURN VALUE</h2>
<div class="sectionbody">
<div class="paragraph"><p>The <em>zmq_getsockopt()</em> function shall return zero if successful. Otherwise it
shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
</div>
+</div>
+<div class="sect1">
<h2 id="_errors">ERRORS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
@@ -1678,6 +1845,8 @@ The operation was interrupted by delivery of a signal. </dd>
</dl></div>
</div>
+</div>
+<div class="sect1">
<h2 id="_example">EXAMPLE</h2>
<div class="sectionbody">
<div class="listingblock">
@@ -1690,23 +1859,27 @@ rc = zmq_getsockopt (socket, ZMQ_HWM, &hwm, &hwm_size); assert (rc == 0);</tt></pre>
</div></div>
</div>
+</div>
+<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph"><p><a href="zmq_setsockopt.html">zmq_setsockopt(3)</a>
<a href="zmq_socket.html">zmq_socket(3)</a>
<a href="zmq.html">zmq(7)</a></p></div>
</div>
+</div>
+<div class="sect1">
<h2 id="_authors">AUTHORS</h2>
<div class="sectionbody">
-<div class="paragraph"><p>This ØMQ manual page was written by Martin Sustrik <<a href="mailto:sustrik@250bpm.com">sustrik@250bpm.com</a>> and
-Martin Lucina <<a href="mailto:mato@kotelna.sk">mato@kotelna.sk</a>>.</p></div>
+<div class="paragraph"><p>This manual page was written by the ØMQ community.</p></div>
+</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
-ØMQ 2.1.10<br />
-Last updated 2011-08-23 16:01:49 CDT
+ØMQ 2.2.0<br />
+Last updated 2012-04-04 13:05:24 CEST
</div>
</div>
</body>
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