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docs/api-2.1/ucx_8h.html

Sun, 24 Apr 2022 17:29:34 +0200

author
Mike Becker <universe@uap-core.de>
date
Sun, 24 Apr 2022 17:29:34 +0200
changeset 533
8d70ad8da899
parent 390
d345541018fa
permissions
-rw-r--r--

do not implicitly zero freshly allocated memory

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<p>Main UCX Header providing most common definitions.  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;stdlib.h&gt;</code><br />
<code>#include &lt;stdint.h&gt;</code><br />
<code>#include &lt;sys/types.h&gt;</code><br />
</div>
<p><a href="ucx_8h_source.html">Go to the source code of this file.</a></p>
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Macros</h2></td></tr>
<tr class="memitem:aa57e5dd22d42387d748cc16777df1383"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#aa57e5dd22d42387d748cc16777df1383">UCX_VERSION_MAJOR</a>&#160;&#160;&#160;2</td></tr>
<tr class="memdesc:aa57e5dd22d42387d748cc16777df1383"><td class="mdescLeft">&#160;</td><td class="mdescRight">Major UCX version as integer constant.  <a href="#aa57e5dd22d42387d748cc16777df1383">More...</a><br /></td></tr>
<tr class="separator:aa57e5dd22d42387d748cc16777df1383"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a9ac10d6353e23d4615a87fc737c65eb0"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#a9ac10d6353e23d4615a87fc737c65eb0">UCX_VERSION_MINOR</a>&#160;&#160;&#160;1</td></tr>
<tr class="memdesc:a9ac10d6353e23d4615a87fc737c65eb0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Minor UCX version as integer constant.  <a href="#a9ac10d6353e23d4615a87fc737c65eb0">More...</a><br /></td></tr>
<tr class="separator:a9ac10d6353e23d4615a87fc737c65eb0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af12001920ca2fc1405615684e4dea284"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#af12001920ca2fc1405615684e4dea284">UCX_VERSION</a>&#160;&#160;&#160;(((<a class="el" href="ucx_8h.html#aa57e5dd22d42387d748cc16777df1383">UCX_VERSION_MAJOR</a>)&lt;&lt;16)|<a class="el" href="ucx_8h.html#a9ac10d6353e23d4615a87fc737c65eb0">UCX_VERSION_MINOR</a>)</td></tr>
<tr class="memdesc:af12001920ca2fc1405615684e4dea284"><td class="mdescLeft">&#160;</td><td class="mdescRight">Version constant which ensures to increase monotonically.  <a href="#af12001920ca2fc1405615684e4dea284">More...</a><br /></td></tr>
<tr class="separator:af12001920ca2fc1405615684e4dea284"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0b5ed6c1a0b15356f4f948acfd32a4cc"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#a0b5ed6c1a0b15356f4f948acfd32a4cc">ucx_szmul</a>(a,  b,  result)&#160;&#160;&#160;<a class="el" href="ucx_8h.html#a6637171cc0ec097b297f731a3036dd3b">ucx_szmul_impl</a>(a, b, result)</td></tr>
<tr class="memdesc:a0b5ed6c1a0b15356f4f948acfd32a4cc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs a multiplication of size_t values and checks for overflow.  <a href="#a0b5ed6c1a0b15356f4f948acfd32a4cc">More...</a><br /></td></tr>
<tr class="separator:a0b5ed6c1a0b15356f4f948acfd32a4cc"><td class="memSeparator" colspan="2">&#160;</td></tr>
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Typedefs</h2></td></tr>
<tr class="memitem:ad2b370c2809914c8b7fedab163c266b3"><td class="memItemLeft" align="right" valign="top">typedef void(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#ad2b370c2809914c8b7fedab163c266b3">ucx_destructor</a>) (void *)</td></tr>
<tr class="memdesc:ad2b370c2809914c8b7fedab163c266b3"><td class="mdescLeft">&#160;</td><td class="mdescRight">A function pointer to a destructor function.  <a href="#ad2b370c2809914c8b7fedab163c266b3">More...</a><br /></td></tr>
<tr class="separator:ad2b370c2809914c8b7fedab163c266b3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:afe5e2d5dbf34778e0e97852051570791"><td class="memItemLeft" align="right" valign="top">typedef int(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#afe5e2d5dbf34778e0e97852051570791">cmp_func</a>) (const void *, const void *, void *)</td></tr>
<tr class="memdesc:afe5e2d5dbf34778e0e97852051570791"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function pointer to a compare function.  <a href="#afe5e2d5dbf34778e0e97852051570791">More...</a><br /></td></tr>
<tr class="separator:afe5e2d5dbf34778e0e97852051570791"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0bc5bf89e556c1d45d10863d52728ac9"><td class="memItemLeft" align="right" valign="top">typedef intmax_t(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#a0bc5bf89e556c1d45d10863d52728ac9">distance_func</a>) (const void *, const void *, void *)</td></tr>
<tr class="memdesc:a0bc5bf89e556c1d45d10863d52728ac9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function pointer to a distance function.  <a href="#a0bc5bf89e556c1d45d10863d52728ac9">More...</a><br /></td></tr>
<tr class="separator:a0bc5bf89e556c1d45d10863d52728ac9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aab917a5fe0965673c73e8ebd0a1fc967"><td class="memItemLeft" align="right" valign="top">typedef void *(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#aab917a5fe0965673c73e8ebd0a1fc967">copy_func</a>) (const void *, void *)</td></tr>
<tr class="memdesc:aab917a5fe0965673c73e8ebd0a1fc967"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function pointer to a copy function.  <a href="#aab917a5fe0965673c73e8ebd0a1fc967">More...</a><br /></td></tr>
<tr class="separator:aab917a5fe0965673c73e8ebd0a1fc967"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a989b3f0fa4d307d278378fde435641ed"><td class="memItemLeft" align="right" valign="top">typedef size_t(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#a989b3f0fa4d307d278378fde435641ed">write_func</a>) (const void *, size_t, size_t, void *)</td></tr>
<tr class="memdesc:a989b3f0fa4d307d278378fde435641ed"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function pointer to a write function.  <a href="#a989b3f0fa4d307d278378fde435641ed">More...</a><br /></td></tr>
<tr class="separator:a989b3f0fa4d307d278378fde435641ed"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6a67e255e460acb58f802067b3ff5fd5"><td class="memItemLeft" align="right" valign="top">typedef size_t(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#a6a67e255e460acb58f802067b3ff5fd5">read_func</a>) (void *, size_t, size_t, void *)</td></tr>
<tr class="memdesc:a6a67e255e460acb58f802067b3ff5fd5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function pointer to a read function.  <a href="#a6a67e255e460acb58f802067b3ff5fd5">More...</a><br /></td></tr>
<tr class="separator:a6a67e255e460acb58f802067b3ff5fd5"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a6637171cc0ec097b297f731a3036dd3b"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="ucx_8h.html#a6637171cc0ec097b297f731a3036dd3b">ucx_szmul_impl</a> (size_t a, size_t b, size_t *result)</td></tr>
<tr class="memdesc:a6637171cc0ec097b297f731a3036dd3b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs a multiplication of size_t values and checks for overflow.  <a href="#a6637171cc0ec097b297f731a3036dd3b">More...</a><br /></td></tr>
<tr class="separator:a6637171cc0ec097b297f731a3036dd3b"><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>Main UCX Header providing most common definitions. </p>
<dl class="section author"><dt>Author</dt><dd>Mike Becker </dd>
<dd>
Olaf Wintermann </dd></dl>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a id="a0b5ed6c1a0b15356f4f948acfd32a4cc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0b5ed6c1a0b15356f4f948acfd32a4cc">&#9670;&nbsp;</a></span>ucx_szmul</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define ucx_szmul</td>
          <td>(</td>
          <td class="paramtype">&#160;</td>
          <td class="paramname">a, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">&#160;</td>
          <td class="paramname">b, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">&#160;</td>
          <td class="paramname">result&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td>&#160;&#160;&#160;<a class="el" href="ucx_8h.html#a6637171cc0ec097b297f731a3036dd3b">ucx_szmul_impl</a>(a, b, result)</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Performs a multiplication of size_t values and checks for overflow. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">a</td><td>first operand </td></tr>
    <tr><td class="paramname">b</td><td>second operand </td></tr>
    <tr><td class="paramname">result</td><td>a pointer to a size_t, where the result should be stored </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>zero, if no overflow occurred and the result is correct, non-zero otherwise </dd></dl>

</div>
</div>
<a id="af12001920ca2fc1405615684e4dea284"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af12001920ca2fc1405615684e4dea284">&#9670;&nbsp;</a></span>UCX_VERSION</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define UCX_VERSION&#160;&#160;&#160;(((<a class="el" href="ucx_8h.html#aa57e5dd22d42387d748cc16777df1383">UCX_VERSION_MAJOR</a>)&lt;&lt;16)|<a class="el" href="ucx_8h.html#a9ac10d6353e23d4615a87fc737c65eb0">UCX_VERSION_MINOR</a>)</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Version constant which ensures to increase monotonically. </p>

</div>
</div>
<a id="aa57e5dd22d42387d748cc16777df1383"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa57e5dd22d42387d748cc16777df1383">&#9670;&nbsp;</a></span>UCX_VERSION_MAJOR</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define UCX_VERSION_MAJOR&#160;&#160;&#160;2</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Major UCX version as integer constant. </p>

</div>
</div>
<a id="a9ac10d6353e23d4615a87fc737c65eb0"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a9ac10d6353e23d4615a87fc737c65eb0">&#9670;&nbsp;</a></span>UCX_VERSION_MINOR</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define UCX_VERSION_MINOR&#160;&#160;&#160;1</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Minor UCX version as integer constant. </p>

</div>
</div>
<h2 class="groupheader">Typedef Documentation</h2>
<a id="afe5e2d5dbf34778e0e97852051570791"></a>
<h2 class="memtitle"><span class="permalink"><a href="#afe5e2d5dbf34778e0e97852051570791">&#9670;&nbsp;</a></span>cmp_func</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">typedef int(* cmp_func) (const void *, const void *, void *)</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Function pointer to a compare function. </p>
<p>The compare function shall take three arguments: the two values that shall be compared and optional additional data. The function shall then return -1 if the first argument is less than the second argument, 1 if the first argument is greater than the second argument and 0 if both arguments are equal. If the third argument is <code>NULL</code>, it shall be ignored. </p>

</div>
</div>
<a id="aab917a5fe0965673c73e8ebd0a1fc967"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aab917a5fe0965673c73e8ebd0a1fc967">&#9670;&nbsp;</a></span>copy_func</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">typedef void*(* copy_func) (const void *, void *)</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Function pointer to a copy function. </p>
<p>The copy function shall create a copy of the first argument and may use additional data provided by the second argument. If the second argument is <code>NULL</code>, it shall be ignored.</p>
<p><b>Attention:</b> if pointers returned by functions of this type may be passed to <code>free()</code> depends on the implementation of the respective <code>copy_func</code>. </p>

</div>
</div>
<a id="a0bc5bf89e556c1d45d10863d52728ac9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0bc5bf89e556c1d45d10863d52728ac9">&#9670;&nbsp;</a></span>distance_func</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">typedef intmax_t(* distance_func) (const void *, const void *, void *)</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Function pointer to a distance function. </p>
<p>The distance function shall take three arguments: the two values for which the distance shall be computed and optional additional data. The function shall then return the signed distance as integer value. </p>

</div>
</div>
<a id="a6a67e255e460acb58f802067b3ff5fd5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a6a67e255e460acb58f802067b3ff5fd5">&#9670;&nbsp;</a></span>read_func</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">typedef size_t(* read_func) (void *, size_t, size_t, void *)</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Function pointer to a read function. </p>
<p>The signature of the read function shall be compatible to the signature of standard <code>fread</code>, though it may use arbitrary data types for source and destination.</p>
<p>The arguments shall contain (in ascending order): a pointer to the destination, the length of one element, the element count and a pointer to the source. </p>

</div>
</div>
<a id="ad2b370c2809914c8b7fedab163c266b3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad2b370c2809914c8b7fedab163c266b3">&#9670;&nbsp;</a></span>ucx_destructor</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">typedef void(* ucx_destructor) (void *)</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>A function pointer to a destructor function. </p>
<dl class="section see"><dt>See also</dt><dd>ucx_mempool_setdestr() </dd>
<dd>
ucx_mempool_regdestr() </dd></dl>

</div>
</div>
<a id="a989b3f0fa4d307d278378fde435641ed"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a989b3f0fa4d307d278378fde435641ed">&#9670;&nbsp;</a></span>write_func</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">typedef size_t(* write_func) (const void *, size_t, size_t, void *)</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Function pointer to a write function. </p>
<p>The signature of the write function shall be compatible to the signature of standard <code>fwrite</code>, though it may use arbitrary data types for source and destination.</p>
<p>The arguments shall contain (in ascending order): a pointer to the source, the length of one element, the element count and a pointer to the destination. </p>

</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="a6637171cc0ec097b297f731a3036dd3b"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a6637171cc0ec097b297f731a3036dd3b">&#9670;&nbsp;</a></span>ucx_szmul_impl()</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int ucx_szmul_impl </td>
          <td>(</td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>a</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>b</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">size_t *&#160;</td>
          <td class="paramname"><em>result</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Performs a multiplication of size_t values and checks for overflow. </p>
<p>This is a custom implementation in case there is no compiler builtin available.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">a</td><td>first operand </td></tr>
    <tr><td class="paramname">b</td><td>second operand </td></tr>
    <tr><td class="paramname">result</td><td>a pointer to a size_t where the result should be stored </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>zero, if no overflow occurred and the result is correct, non-zero otherwise </dd></dl>

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