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<div class="header">
  <div class="summary">
<a href="#func-members">Functions</a>  </div>
  <div class="headertitle">
<div class="title">Receiver<div class="ingroups"><a class="el" href="a00046.html">Engine</a> &raquo; <a class="el" href="a00048.html">Link</a></div></div>  </div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gaf331f33acd1fddbb6f8e674a8a7c6aa2"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00050.html#gaf331f33acd1fddbb6f8e674a8a7c6aa2">pn_link_flow</a> (<a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *receiver, int credit)</td></tr>
<tr class="memdesc:gaf331f33acd1fddbb6f8e674a8a7c6aa2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Grant credit for incoming deliveries on a receiver.  <a href="#gaf331f33acd1fddbb6f8e674a8a7c6aa2">More...</a><br /></td></tr>
<tr class="separator:gaf331f33acd1fddbb6f8e674a8a7c6aa2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga2f48aec7e3de526bbdea1c4e99708357"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00050.html#ga2f48aec7e3de526bbdea1c4e99708357">pn_link_drain</a> (<a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *receiver, int credit)</td></tr>
<tr class="memdesc:ga2f48aec7e3de526bbdea1c4e99708357"><td class="mdescLeft">&#160;</td><td class="mdescRight">Grant credit for incoming deliveries on a receiver, and set drain mode to true.  <a href="#ga2f48aec7e3de526bbdea1c4e99708357">More...</a><br /></td></tr>
<tr class="separator:ga2f48aec7e3de526bbdea1c4e99708357"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga22837f7f8e152add8de867bbe4163892"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00050.html#ga22837f7f8e152add8de867bbe4163892">pn_link_set_drain</a> (<a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *receiver, bool drain)</td></tr>
<tr class="memdesc:ga22837f7f8e152add8de867bbe4163892"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set the drain mode on a link.  <a href="#ga22837f7f8e152add8de867bbe4163892">More...</a><br /></td></tr>
<tr class="separator:ga22837f7f8e152add8de867bbe4163892"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaa98289676877e6c820a95e4bce94eda6"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> ssize_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00050.html#gaa98289676877e6c820a95e4bce94eda6">pn_link_recv</a> (<a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *receiver, char *bytes, size_t n)</td></tr>
<tr class="memdesc:gaa98289676877e6c820a95e4bce94eda6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Receive message data for the current delivery on a link.  <a href="#gaa98289676877e6c820a95e4bce94eda6">More...</a><br /></td></tr>
<tr class="separator:gaa98289676877e6c820a95e4bce94eda6"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gacda3e0bc16ff65cbfa99087f9da025c7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00050.html#gacda3e0bc16ff65cbfa99087f9da025c7">pn_link_draining</a> (<a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *receiver)</td></tr>
<tr class="memdesc:gacda3e0bc16ff65cbfa99087f9da025c7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check if a link is currently draining.  <a href="#gacda3e0bc16ff65cbfa99087f9da025c7">More...</a><br /></td></tr>
<tr class="separator:gacda3e0bc16ff65cbfa99087f9da025c7"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="ga2f48aec7e3de526bbdea1c4e99708357"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> void pn_link_drain </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *&#160;</td>
          <td class="paramname"><em>receiver</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&#160;</td>
          <td class="paramname"><em>credit</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Grant credit for incoming deliveries on a receiver, and set drain mode to true. </p>
<p>Use <a class="el" href="a00050.html#ga22837f7f8e152add8de867bbe4163892" title="Set the drain mode on a link. ">pn_link_set_drain</a> to set the drain mode explicitly.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">receiver</td><td>a receiving link object </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">credit</td><td>the amount to increment the link credit </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a class="anchor" id="gacda3e0bc16ff65cbfa99087f9da025c7"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> bool pn_link_draining </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *&#160;</td>
          <td class="paramname"><em>receiver</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Check if a link is currently draining. </p>
<p>A link is defined to be draining when drain mode is set to true, and the sender still has excess credit.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">receiver</td><td>a receiving link object </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>true if the link is currently draining, false otherwise </dd></dl>

</div>
</div>
<a class="anchor" id="gaf331f33acd1fddbb6f8e674a8a7c6aa2"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> void pn_link_flow </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *&#160;</td>
          <td class="paramname"><em>receiver</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int&#160;</td>
          <td class="paramname"><em>credit</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Grant credit for incoming deliveries on a receiver. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">receiver</td><td>a receiving link object </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">credit</td><td>the amount to increment the link credit </td></tr>
  </table>
  </dd>
</dl>

</div>
</div>
<a class="anchor" id="gaa98289676877e6c820a95e4bce94eda6"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> ssize_t pn_link_recv </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *&#160;</td>
          <td class="paramname"><em>receiver</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">char *&#160;</td>
          <td class="paramname"><em>bytes</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>n</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Receive message data for the current delivery on a link. </p>
<p>Use <a class="el" href="a00044.html#ga6ad7ae3286b0a4f553b33ea9ce5bb172" title="Get the amount of pending message data for a delivery. ">pn_delivery_pending</a> on the current delivery to figure out how much buffer space is needed.</p>
<p>Note that the link API can be used to stream large messages across the network, so just because there is no data to read does not imply the message is complete. To ensure the entirety of the message data has been read, either invoke <a class="el" href="a00050.html#gaa98289676877e6c820a95e4bce94eda6" title="Receive message data for the current delivery on a link. ">pn_link_recv</a> until PN_EOS is returned, or verify that <a class="el" href="a00044.html#gad3cdc28f24b74b71e547881b16c6c20b" title="Check if a delivery only has partial message data. ">pn_delivery_partial</a> is false, and <a class="el" href="a00044.html#ga6ad7ae3286b0a4f553b33ea9ce5bb172" title="Get the amount of pending message data for a delivery. ">pn_delivery_pending</a> is 0.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">receiver</td><td>a receiving link object </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">bytes</td><td>a pointer to an empty buffer </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">n</td><td>the buffer capacity </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>the number of bytes received, PN_EOS, or an error code </dd></dl>

</div>
</div>
<a class="anchor" id="ga22837f7f8e152add8de867bbe4163892"></a>
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      <table class="memname">
        <tr>
          <td class="memname"><a class="el" href="a00023.html#acfa9628d87130a64f95ee17c57a7c13b">PN_EXTERN</a> void pn_link_set_drain </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="a00048.html#ga89dad3aa7934329a7ff467c636687bc0">pn_link_t</a> *&#160;</td>
          <td class="paramname"><em>receiver</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">bool&#160;</td>
          <td class="paramname"><em>drain</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Set the drain mode on a link. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">receiver</td><td>a receiving link object </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">drain</td><td>the drain mode </td></tr>
  </table>
  </dd>
</dl>

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