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apache / kudu-site / 1c9b84bc079a2d043bce7b1d7d4f2594eaa185d1 / . / releases / 1.11.0 / cpp-client-api / status_8h.html
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<div class="textblock"><code>#include &lt;errno.h&gt;</code><br />
<code>#include &lt;stdint.h&gt;</code><br />
<code>#include &lt;cstddef&gt;</code><br />
<code>#include &lt;string&gt;</code><br />
<code>#include &quot;kudu/client/stubs.h&quot;</code><br />
<code>#include &quot;kudu/util/kudu_export.h&quot;</code><br />
<code>#include &quot;kudu/util/slice.h&quot;</code><br />
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Include dependency graph for status.h:</div>
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<p><a href="status_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classkudu_1_1Status.html">kudu::Status</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">A representation of an operation's outcome. <a href="classkudu_1_1Status.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:a0de56a3f0e9d83b8ffdd63eac83c54ab"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#a0de56a3f0e9d83b8ffdd63eac83c54ab">KUDU_RETURN_NOT_OK</a>(s)</td></tr>
<tr class="memdesc:a0de56a3f0e9d83b8ffdd63eac83c54ab"><td class="mdescLeft">&#160;</td><td class="mdescRight">Return the given status if it is not <code>OK</code>. <a href="#a0de56a3f0e9d83b8ffdd63eac83c54ab">More...</a><br /></td></tr>
<tr class="separator:a0de56a3f0e9d83b8ffdd63eac83c54ab"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af66b8458f1d3f1264c1da86744e29e46"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#af66b8458f1d3f1264c1da86744e29e46">KUDU_RETURN_NOT_OK_PREPEND</a>(s, msg)</td></tr>
<tr class="memdesc:af66b8458f1d3f1264c1da86744e29e46"><td class="mdescLeft">&#160;</td><td class="mdescRight">Return the given status if it is not OK, but first clone it and prepend the given message. <a href="#af66b8458f1d3f1264c1da86744e29e46">More...</a><br /></td></tr>
<tr class="separator:af66b8458f1d3f1264c1da86744e29e46"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a58d31c81bf1101a3ead737e9a4a4f223"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#a58d31c81bf1101a3ead737e9a4a4f223">KUDU_RETURN_NOT_OK_RET</a>(to_call, to_return)</td></tr>
<tr class="memdesc:a58d31c81bf1101a3ead737e9a4a4f223"><td class="mdescLeft">&#160;</td><td class="mdescRight">Return <code>to_return</code> if <code>to_call</code> returns a bad status. The substitution for 'to_return' may reference the variable <code>s</code> for the bad status. <a href="#a58d31c81bf1101a3ead737e9a4a4f223">More...</a><br /></td></tr>
<tr class="separator:a58d31c81bf1101a3ead737e9a4a4f223"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8fd1f0d6a9b2457c18e218d3540c4b3e"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#a8fd1f0d6a9b2457c18e218d3540c4b3e">KUDU_RETURN_NOT_OK_EVAL</a>(s, on_error)</td></tr>
<tr class="memdesc:a8fd1f0d6a9b2457c18e218d3540c4b3e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Return the given status if it is not OK, evaluating <code>on_error</code> if so. <a href="#a8fd1f0d6a9b2457c18e218d3540c4b3e">More...</a><br /></td></tr>
<tr class="separator:a8fd1f0d6a9b2457c18e218d3540c4b3e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1e64fec5ef85c0c738f6ac3f398f607e"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#a1e64fec5ef85c0c738f6ac3f398f607e">KUDU_WARN_NOT_OK</a>(to_call, warning_prefix)</td></tr>
<tr class="memdesc:a1e64fec5ef85c0c738f6ac3f398f607e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Emit a warning if <code>to_call</code> returns a bad status. <a href="#a1e64fec5ef85c0c738f6ac3f398f607e">More...</a><br /></td></tr>
<tr class="separator:a1e64fec5ef85c0c738f6ac3f398f607e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abbd85cc2c5535627091bb06a21918150"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#abbd85cc2c5535627091bb06a21918150">KUDU_LOG_AND_RETURN</a>(level, status)</td></tr>
<tr class="memdesc:abbd85cc2c5535627091bb06a21918150"><td class="mdescLeft">&#160;</td><td class="mdescRight">Log the given status and return immediately. <a href="#abbd85cc2c5535627091bb06a21918150">More...</a><br /></td></tr>
<tr class="separator:abbd85cc2c5535627091bb06a21918150"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af09a6a2eca53c9424d74c7fd9f39c5ce"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#af09a6a2eca53c9424d74c7fd9f39c5ce">KUDU_RETURN_NOT_OK_LOG</a>(s, level, msg)</td></tr>
<tr class="memdesc:af09a6a2eca53c9424d74c7fd9f39c5ce"><td class="mdescLeft">&#160;</td><td class="mdescRight">If the given status is not OK, log it and 'msg' at 'level' and return the status. <a href="#af09a6a2eca53c9424d74c7fd9f39c5ce">More...</a><br /></td></tr>
<tr class="separator:af09a6a2eca53c9424d74c7fd9f39c5ce"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a706c9f6ef1715b8f7a9185fb3c247d3f"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#a706c9f6ef1715b8f7a9185fb3c247d3f">KUDU_CHECK_OK_PREPEND</a>(to_call, msg)</td></tr>
<tr class="memdesc:a706c9f6ef1715b8f7a9185fb3c247d3f"><td class="mdescLeft">&#160;</td><td class="mdescRight">If <code>to_call</code> returns a bad status, CHECK immediately with a logged message of <code>msg</code> followed by the status. <a href="#a706c9f6ef1715b8f7a9185fb3c247d3f">More...</a><br /></td></tr>
<tr class="separator:a706c9f6ef1715b8f7a9185fb3c247d3f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac503ba85e942147294cdc82087da60f6"><td class="memItemLeft" align="right" valign="top"><a id="ac503ba85e942147294cdc82087da60f6"></a>
#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#ac503ba85e942147294cdc82087da60f6">KUDU_CHECK_OK</a>(s)&#160;&#160;&#160;<a class="el" href="status_8h.html#a706c9f6ef1715b8f7a9185fb3c247d3f">KUDU_CHECK_OK_PREPEND</a>(s, &quot;Bad status&quot;)</td></tr>
<tr class="memdesc:ac503ba85e942147294cdc82087da60f6"><td class="mdescLeft">&#160;</td><td class="mdescRight">If the status is bad, CHECK immediately, appending the status to the logged message. <br /></td></tr>
<tr class="separator:ac503ba85e942147294cdc82087da60f6"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a2b360b53025724bb97d1dc21e25e26cc"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#a2b360b53025724bb97d1dc21e25e26cc">KUDU_DCHECK_OK_PREPEND</a>(to_call, msg)</td></tr>
<tr class="memdesc:a2b360b53025724bb97d1dc21e25e26cc"><td class="mdescLeft">&#160;</td><td class="mdescRight">If <code>to_call</code> returns a bad status, DCHECK immediately with a logged message of <code>msg</code> followed by the status. <a href="#a2b360b53025724bb97d1dc21e25e26cc">More...</a><br /></td></tr>
<tr class="separator:a2b360b53025724bb97d1dc21e25e26cc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a99332afa18f00de3c7fcf3e76949df9d"><td class="memItemLeft" align="right" valign="top"><a id="a99332afa18f00de3c7fcf3e76949df9d"></a>
#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="status_8h.html#a99332afa18f00de3c7fcf3e76949df9d">KUDU_DCHECK_OK</a>(s)&#160;&#160;&#160;<a class="el" href="status_8h.html#a2b360b53025724bb97d1dc21e25e26cc">KUDU_DCHECK_OK_PREPEND</a>(s, &quot;Bad status&quot;)</td></tr>
<tr class="memdesc:a99332afa18f00de3c7fcf3e76949df9d"><td class="mdescLeft">&#160;</td><td class="mdescRight">If the status is bad, DCHECK immediately, appending the status to the logged 'Bad status' message. <br /></td></tr>
<tr class="separator:a99332afa18f00de3c7fcf3e76949df9d"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>This header is used in both the Kudu build as well as in builds of applications that use the Kudu C++ client. In the latter we need to be careful to "namespace" our macros, to avoid colliding or overriding with similarly named macros belonging to the application.</p>
<p>KUDU_HEADERS_USE_SHORT_STATUS_MACROS handles this behavioral change. When defined, we're building Kudu and: </p><ul>
<li>Non-namespaced macros are allowed and mapped to the namespaced versions defined above. </li>
<li>Namespaced versions of glog macros are mapped to the real glog macros (otherwise the macros are defined in the C++ client stubs). </li>
</ul>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a id="a706c9f6ef1715b8f7a9185fb3c247d3f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a706c9f6ef1715b8f7a9185fb3c247d3f">&#9670;&nbsp;</a></span>KUDU_CHECK_OK_PREPEND</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define KUDU_CHECK_OK_PREPEND</td>
<td>(</td>
<td class="paramtype">&#160;</td>
<td class="paramname">to_call, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">msg&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; _s = (to_call); \</div><div class="line"> KUDU_CHECK(_s.ok()) &lt;&lt; (msg) &lt;&lt; <span class="stringliteral">&quot;: &quot;</span> &lt;&lt; _s.ToString(); \</div><div class="line"> } <span class="keywordflow">while</span> (0)</div></div><!-- fragment -->
<p>If <code>to_call</code> returns a bad status, CHECK immediately with a logged message of <code>msg</code> followed by the status. </p>
</div>
</div>
<a id="a2b360b53025724bb97d1dc21e25e26cc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a2b360b53025724bb97d1dc21e25e26cc">&#9670;&nbsp;</a></span>KUDU_DCHECK_OK_PREPEND</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define KUDU_DCHECK_OK_PREPEND</td>
<td>(</td>
<td class="paramtype">&#160;</td>
<td class="paramname">to_call, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">msg&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; _s = (to_call); \</div><div class="line"> KUDU_DCHECK(_s.ok()) &lt;&lt; (msg) &lt;&lt; <span class="stringliteral">&quot;: &quot;</span> &lt;&lt; _s.ToString(); \</div><div class="line"> } <span class="keywordflow">while</span> (0)</div></div><!-- fragment -->
<p>If <code>to_call</code> returns a bad status, DCHECK immediately with a logged message of <code>msg</code> followed by the status. </p>
</div>
</div>
<a id="abbd85cc2c5535627091bb06a21918150"></a>
<h2 class="memtitle"><span class="permalink"><a href="#abbd85cc2c5535627091bb06a21918150">&#9670;&nbsp;</a></span>KUDU_LOG_AND_RETURN</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define KUDU_LOG_AND_RETURN</td>
<td>(</td>
<td class="paramtype">&#160;</td>
<td class="paramname">level, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">status&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; _s = (status); \</div><div class="line"> KUDU_LOG(level) &lt;&lt; _s.ToString(); \</div><div class="line"> return _s; \</div><div class="line"> } <span class="keywordflow">while</span> (0)</div></div><!-- fragment -->
<p>Log the given status and return immediately. </p>
</div>
</div>
<a id="a0de56a3f0e9d83b8ffdd63eac83c54ab"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0de56a3f0e9d83b8ffdd63eac83c54ab">&#9670;&nbsp;</a></span>KUDU_RETURN_NOT_OK</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">#define KUDU_RETURN_NOT_OK</td>
<td>(</td>
<td class="paramtype">&#160;</td>
<td class="paramname">s</td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; _s = (s); \</div><div class="line"> if (PREDICT_FALSE(!_s.ok())) return _s; \</div><div class="line"> } while (0)</div></div><!-- fragment -->
<p>Return the given status if it is not <code>OK</code>. </p>
</div>
</div>
<a id="a8fd1f0d6a9b2457c18e218d3540c4b3e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a8fd1f0d6a9b2457c18e218d3540c4b3e">&#9670;&nbsp;</a></span>KUDU_RETURN_NOT_OK_EVAL</h2>
<div class="memitem">
<div class="memproto">
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<td class="memname">#define KUDU_RETURN_NOT_OK_EVAL</td>
<td>(</td>
<td class="paramtype">&#160;</td>
<td class="paramname">s, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">on_error&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; _s = (s); \</div><div class="line"> if (PREDICT_FALSE(!_s.ok())) { \</div><div class="line"> (on_error); \</div><div class="line"> return _s; \</div><div class="line"> } \</div><div class="line"> } <span class="keywordflow">while</span> (0)</div></div><!-- fragment -->
<p>Return the given status if it is not OK, evaluating <code>on_error</code> if so. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#af09a6a2eca53c9424d74c7fd9f39c5ce">&#9670;&nbsp;</a></span>KUDU_RETURN_NOT_OK_LOG</h2>
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<td class="memname">#define KUDU_RETURN_NOT_OK_LOG</td>
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<td class="paramname">s, </td>
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<td class="paramtype">&#160;</td>
<td class="paramname">level, </td>
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<td class="paramtype">&#160;</td>
<td class="paramname">msg&#160;</td>
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<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; _s = (s); \</div><div class="line"> if (PREDICT_FALSE(!_s.ok())) { \</div><div class="line"> KUDU_LOG(level) &lt;&lt; <span class="stringliteral">&quot;Status: &quot;</span> &lt;&lt; _s.ToString() &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; (msg); \</div><div class="line"> return _s; \</div><div class="line"> } \</div><div class="line"> } <span class="keywordflow">while</span> (0)</div></div><!-- fragment -->
<p>If the given status is not OK, log it and 'msg' at 'level' and return the status. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#af66b8458f1d3f1264c1da86744e29e46">&#9670;&nbsp;</a></span>KUDU_RETURN_NOT_OK_PREPEND</h2>
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<td class="memname">#define KUDU_RETURN_NOT_OK_PREPEND</td>
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<td class="paramname">s, </td>
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<td class="paramtype">&#160;</td>
<td class="paramname">msg&#160;</td>
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<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; _s = (s); \</div><div class="line"> if (PREDICT_FALSE(!_s.ok())) return _s.CloneAndPrepend(msg); \</div><div class="line"> } while (0)</div></div><!-- fragment -->
<p>Return the given status if it is not OK, but first clone it and prepend the given message. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a58d31c81bf1101a3ead737e9a4a4f223">&#9670;&nbsp;</a></span>KUDU_RETURN_NOT_OK_RET</h2>
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<td class="memname">#define KUDU_RETURN_NOT_OK_RET</td>
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<td class="paramname">to_call, </td>
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<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; s = (to_call); \</div><div class="line"> if (PREDICT_FALSE(!s.ok())) return (to_return); \</div><div class="line"> } while (0)</div></div><!-- fragment -->
<p>Return <code>to_return</code> if <code>to_call</code> returns a bad status. The substitution for 'to_return' may reference the variable <code>s</code> for the bad status. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a1e64fec5ef85c0c738f6ac3f398f607e">&#9670;&nbsp;</a></span>KUDU_WARN_NOT_OK</h2>
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<td class="memname">#define KUDU_WARN_NOT_OK</td>
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<td class="paramname">to_call, </td>
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<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div><div class="line"> const ::kudu::Status&amp; _s = (to_call); \</div><div class="line"> if (PREDICT_FALSE(!_s.ok())) { \</div><div class="line"> KUDU_LOG(WARNING) &lt;&lt; (warning_prefix) &lt;&lt; <span class="stringliteral">&quot;: &quot;</span> &lt;&lt; _s.ToString(); \</div><div class="line"> } \</div><div class="line"> } <span class="keywordflow">while</span> (0)</div></div><!-- fragment -->
<p>Emit a warning if <code>to_call</code> returns a bad status. </p>
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