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<a href="useful_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright 2015 gRPC authors.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * you may not use this file except in compliance with the License.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> *     http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> * limitations under the License.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#ifndef GRPC_SUPPORT_USEFUL_H</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define GRPC_SUPPORT_USEFUL_H</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="useful_8h.html#a298322c952526928cf8dbc7aaba7b84d">   24</a></span>&#160;<span class="preprocessor">#define GPR_MIN(a, b) ((a) &lt; (b) ? (a) : (b))</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"><a class="line" href="useful_8h.html#af50c518bb1183da84adb7d8a86cd568a">   25</a></span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define GPR_MAX(a, b) ((a) &gt; (b) ? (a) : (b))</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="useful_8h.html#ac974b8c13ee716193e0ee30d9513672c">   26</a></span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define GPR_CLAMP(a, min, max) ((a) &lt; (min) ? (min) : (a) &gt; (max) ? (max) : (a))</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="useful_8h.html#a6f7a8aba8e044f6b20fc8a7560f28f85">   28</a></span>&#160;<span class="preprocessor">#define GPR_ROTL(x, n) (((x) &lt;&lt; (n)) | ((x) &gt;&gt; (sizeof(x) * 8 - (n))))</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="useful_8h.html#a5ff4b278972e799dc134963a0249f316">   29</a></span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define GPR_ROTR(x, n) (((x) &gt;&gt; (n)) | ((x) &lt;&lt; (sizeof(x) * 8 - (n))))</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="useful_8h.html#a0e411d4f81a169c97c319d4e84df5747">   31</a></span>&#160;<span class="preprocessor">#define GPR_ARRAY_SIZE(array) (sizeof(array) / sizeof(*(array)))</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="useful_8h.html#a9f884f8218a97ed9739e2dac467f0719">   33</a></span>&#160;<span class="preprocessor">#define GPR_SWAP(type, a, b) \</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">  do {                       \</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">    type x = a;              \</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">    a = b;                   \</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor">    b = x;                   \</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="preprocessor">  } while (0)</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="useful_8h.html#a28de4ed955bfc2bff309061b7820a37a">   41</a></span>&#160;<span class="preprocessor">#define GPR_BITSET(i, n) ((*(i)) |= (1u &lt;&lt; (n)))</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="useful_8h.html#af797bf1803f9809b3ccceaa619078c89">   44</a></span>&#160;<span class="preprocessor">#define GPR_BITCLEAR(i, n) ((*(i)) &amp;= ~(1u &lt;&lt; (n)))</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="useful_8h.html#a7c54bb2fffdaae24ba38ca5e5c53ab41">   47</a></span>&#160;<span class="preprocessor">#define GPR_BITGET(i, n) (((i) &amp; (1u &lt;&lt; (n))) != 0)</span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="useful_8h.html#a601e1be692fe7922b52991a5d410b945">   49</a></span>&#160;<span class="preprocessor">#define GPR_INTERNAL_HEXDIGIT_BITCOUNT(x)                        \</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="preprocessor">  ((x) - (((x) &gt;&gt; 1) &amp; 0x77777777) - (((x) &gt;&gt; 2) &amp; 0x33333333) - \</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="preprocessor">   (((x) &gt;&gt; 3) &amp; 0x11111111))</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="useful_8h.html#a8f51444fe97eb3f83184b98035e3357f">   54</a></span>&#160;<span class="preprocessor">#define GPR_BITCOUNT(i)                          \</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="preprocessor">  (((GPR_INTERNAL_HEXDIGIT_BITCOUNT(i) +         \</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="preprocessor">     (GPR_INTERNAL_HEXDIGIT_BITCOUNT(i) &gt;&gt; 4)) &amp; \</span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="preprocessor">    0x0f0f0f0f) %                                \</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="preprocessor">   255)</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="useful_8h.html#a0f5453aa5dc6d3314ad8a894177d257b">   60</a></span>&#160;<span class="preprocessor">#define GPR_ICMP(a, b) ((a) &lt; (b) ? -1 : ((a) &gt; (b) ? 1 : 0))</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="useful_8h.html#ac303d133f8b8a8d81799ae11d00ae1d3">   62</a></span>&#160;<span class="preprocessor">#define GPR_HASH_POINTER(x, range) \</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="preprocessor">  ((((size_t)x) &gt;&gt; 4) ^ (((size_t)x) &gt;&gt; 9) ^ (((size_t)x) &gt;&gt; 14)) % (range)</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* GRPC_SUPPORT_USEFUL_H */</span><span class="preprocessor"></span></div>
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