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<p>Non-Standard (or Nagios) utility functions and macros.  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;sys/types.h&gt;</code><br/>
<code>#include &lt;sys/time.h&gt;</code><br/>
</div>
<p><a href="nsutils_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="memitem:a96824974fc1cbb6da7418f3ac5e4d57d"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a96824974fc1cbb6da7418f3ac5e4d57d"></a>
#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="nsutils_8h.html#a96824974fc1cbb6da7418f3ac5e4d57d">alloc_nr</a>(x)&#160;&#160;&#160;(((x)+16)*3/2)</td></tr>
<tr class="memdesc:a96824974fc1cbb6da7418f3ac5e4d57d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Macro for dynamically increasing vector lengths. <br/></td></tr>
<tr class="separator:a96824974fc1cbb6da7418f3ac5e4d57d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7674c6154264b62f100ad41863e64dee"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="nsutils_8h.html#a7674c6154264b62f100ad41863e64dee">real_online_cpus</a> (void)</td></tr>
<tr class="memdesc:a7674c6154264b62f100ad41863e64dee"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get number of online cpus.  <a href="#a7674c6154264b62f100ad41863e64dee">More...</a><br/></td></tr>
<tr class="separator:a7674c6154264b62f100ad41863e64dee"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a60a5912bf88ddfa4c6cbf1faa0b2ef9a"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="nsutils_8h.html#a60a5912bf88ddfa4c6cbf1faa0b2ef9a">online_cpus</a> (void)</td></tr>
<tr class="memdesc:a60a5912bf88ddfa4c6cbf1faa0b2ef9a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Wrapper for <a class="el" href="nsutils_8h.html#a7674c6154264b62f100ad41863e64dee" title="Get number of online cpus. ">real_online_cpus()</a>, returning 1 in case we can't detect any active cpus.  <a href="#a60a5912bf88ddfa4c6cbf1faa0b2ef9a">More...</a><br/></td></tr>
<tr class="separator:a60a5912bf88ddfa4c6cbf1faa0b2ef9a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a48c79bbb0b4bb978a529835c3b17d6a2"><td class="memItemLeft" align="right" valign="top">const char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="nsutils_8h.html#a48c79bbb0b4bb978a529835c3b17d6a2">mkstr</a> (const char *fmt,...) __attribute__((__format__(__printf__</td></tr>
<tr class="memdesc:a48c79bbb0b4bb978a529835c3b17d6a2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Create a short-lived string in stack-allocated memory The number and size of strings is limited (currently to 256 strings of 32 bytes each), so beware and use this sensibly.  <a href="#a48c79bbb0b4bb978a529835c3b17d6a2">More...</a><br/></td></tr>
<tr class="separator:a48c79bbb0b4bb978a529835c3b17d6a2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a89bdd94baabcc0743a916ef7fcf75532"><td class="memItemLeft" align="right" valign="top">const char int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="nsutils_8h.html#a89bdd94baabcc0743a916ef7fcf75532">tv_delta_msec</a> (const struct timeval *start, const struct timeval *stop)</td></tr>
<tr class="memdesc:a89bdd94baabcc0743a916ef7fcf75532"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculate the millisecond delta between two timeval structs.  <a href="#a89bdd94baabcc0743a916ef7fcf75532">More...</a><br/></td></tr>
<tr class="separator:a89bdd94baabcc0743a916ef7fcf75532"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a231490982ef814eed7b04ba16edc5520"><td class="memItemLeft" align="right" valign="top">float&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="nsutils_8h.html#a231490982ef814eed7b04ba16edc5520">tv_delta_f</a> (const struct timeval *start, const struct timeval *stop)</td></tr>
<tr class="memdesc:a231490982ef814eed7b04ba16edc5520"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get timeval delta as seconds.  <a href="#a231490982ef814eed7b04ba16edc5520">More...</a><br/></td></tr>
<tr class="separator:a231490982ef814eed7b04ba16edc5520"><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>Non-Standard (or Nagios) utility functions and macros. </p>
<p>This is where we house all helpers and macros that fall outside the "standard-ish" norm. The prefixes "nsu_" and NSU_ are reserved for this purpose, so we avoid clashing with other applications that may have similarly-acting functions with identical names.</p>
<p>The functions already here lack the nsu_ prefix for backwards compatibility reasons. It's possible we'll have to fix that some day, but let's leave that for later. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="a48c79bbb0b4bb978a529835c3b17d6a2"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">const char* mkstr </td>
          <td>(</td>
          <td class="paramtype">const char *&#160;</td>
          <td class="paramname"><em>fmt</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">&#160;</td>
          <td class="paramname"><em>...</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Create a short-lived string in stack-allocated memory The number and size of strings is limited (currently to 256 strings of 32 bytes each), so beware and use this sensibly. </p>
<p>Intended for number-to-string conversion and other short strings. </p>
<dl class="section note"><dt>Note</dt><dd>The returned string must <em>not</em> be free()'d! </dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">fmt</td><td>The format string </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>A pointer to the formatted string on success. Undefined on errors </dd></dl>

</div>
</div>
<a class="anchor" id="a60a5912bf88ddfa4c6cbf1faa0b2ef9a"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int online_cpus </td>
          <td>(</td>
          <td class="paramtype">void&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Wrapper for <a class="el" href="nsutils_8h.html#a7674c6154264b62f100ad41863e64dee" title="Get number of online cpus. ">real_online_cpus()</a>, returning 1 in case we can't detect any active cpus. </p>
<dl class="section return"><dt>Returns</dt><dd>Number of active cpu cores on success. 1 on failure. </dd></dl>

</div>
</div>
<a class="anchor" id="a7674c6154264b62f100ad41863e64dee"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int real_online_cpus </td>
          <td>(</td>
          <td class="paramtype">void&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Get number of online cpus. </p>
<dl class="section return"><dt>Returns</dt><dd>Active cpu cores detected on success. 0 on failure. </dd></dl>

</div>
</div>
<a class="anchor" id="a231490982ef814eed7b04ba16edc5520"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">float tv_delta_f </td>
          <td>(</td>
          <td class="paramtype">const struct timeval *&#160;</td>
          <td class="paramname"><em>start</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const struct timeval *&#160;</td>
          <td class="paramname"><em>stop</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Get timeval delta as seconds. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">start</td><td>The start time </td></tr>
    <tr><td class="paramname">stop</td><td>The stop time </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>time difference in fractions of seconds </dd></dl>

</div>
</div>
<a class="anchor" id="a89bdd94baabcc0743a916ef7fcf75532"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">const char int tv_delta_msec </td>
          <td>(</td>
          <td class="paramtype">const struct timeval *&#160;</td>
          <td class="paramname"><em>start</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const struct timeval *&#160;</td>
          <td class="paramname"><em>stop</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Calculate the millisecond delta between two timeval structs. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">start</td><td>The start time </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">stop</td><td>The stop time </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The millisecond delta between the two structs </dd></dl>

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