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<title>LCOV - coverage.info - usr/include/c++/13/ext/atomicity.h</title>
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<tr><td class="title">LCOV - code coverage report</td></tr>
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<td width="10%" class="headerValue"><a href="../../../../../index.html">top level</a> - <a href="index.html">/usr/include/c++/13/ext</a> - atomicity.h<span style="font-size: 80%;"> (source / <a href="atomicity.h.func-c.html">functions</a>)</span></td>
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<td width="5%" class="headerCovTableHead">Coverage</td>
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<td width="5%" class="headerCovTableHead" title="Covered + Uncovered code">Total</td>
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<td width="5%" class="headerCovTableHead" title="Exercised code only">Hit</td>
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<tr>
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<td class="headerItem">Test:</td>
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<td class="headerValue">coverage.info</td>
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<td></td>
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<td class="headerItem">Lines:</td>
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<td class="headerCovTableEntryHi">100.0 %</td>
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<td class="headerCovTableEntry">12</td>
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<td class="headerCovTableEntry">12</td>
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</tr>
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<tr>
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<td class="headerItem">Test Date:</td>
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<td class="headerValue">2024-04-30 13:17:26</td>
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<td></td>
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<td class="headerItem">Functions:</td>
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<td class="headerCovTableEntryHi">-</td>
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<td class="headerCovTableEntry">0</td>
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<td class="headerCovTableEntry">0</td>
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<tr><td><img src="../../../../../glass.png" width=3 height=3 alt=""></td></tr>
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<pre class="sourceHeading"> Line data Source code</pre>
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<pre class="source">
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<span id="L1"><span class="lineNum"> 1</span> : // Support for atomic operations -*- C++ -*-</span>
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<span id="L2"><span class="lineNum"> 2</span> : </span>
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<span id="L3"><span class="lineNum"> 3</span> : // Copyright (C) 2004-2023 Free Software Foundation, Inc.</span>
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<span id="L4"><span class="lineNum"> 4</span> : //</span>
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<span id="L5"><span class="lineNum"> 5</span> : // This file is part of the GNU ISO C++ Library. This library is free</span>
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<span id="L6"><span class="lineNum"> 6</span> : // software; you can redistribute it and/or modify it under the</span>
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<span id="L7"><span class="lineNum"> 7</span> : // terms of the GNU General Public License as published by the</span>
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<span id="L8"><span class="lineNum"> 8</span> : // Free Software Foundation; either version 3, or (at your option)</span>
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<span id="L9"><span class="lineNum"> 9</span> : // any later version.</span>
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<span id="L10"><span class="lineNum"> 10</span> : </span>
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<span id="L11"><span class="lineNum"> 11</span> : // This library is distributed in the hope that it will be useful,</span>
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<span id="L12"><span class="lineNum"> 12</span> : // but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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<span id="L13"><span class="lineNum"> 13</span> : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
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<span id="L14"><span class="lineNum"> 14</span> : // GNU General Public License for more details.</span>
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<span id="L15"><span class="lineNum"> 15</span> : </span>
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<span id="L16"><span class="lineNum"> 16</span> : // Under Section 7 of GPL version 3, you are granted additional</span>
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<span id="L17"><span class="lineNum"> 17</span> : // permissions described in the GCC Runtime Library Exception, version</span>
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<span id="L18"><span class="lineNum"> 18</span> : // 3.1, as published by the Free Software Foundation.</span>
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<span id="L19"><span class="lineNum"> 19</span> : </span>
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<span id="L20"><span class="lineNum"> 20</span> : // You should have received a copy of the GNU General Public License and</span>
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<span id="L21"><span class="lineNum"> 21</span> : // a copy of the GCC Runtime Library Exception along with this program;</span>
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<span id="L22"><span class="lineNum"> 22</span> : // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span>
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<span id="L23"><span class="lineNum"> 23</span> : // <http://www.gnu.org/licenses/>.</span>
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<span id="L24"><span class="lineNum"> 24</span> : </span>
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<span id="L25"><span class="lineNum"> 25</span> : /** @file ext/atomicity.h</span>
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<span id="L26"><span class="lineNum"> 26</span> : * This file is a GNU extension to the Standard C++ Library.</span>
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<span id="L27"><span class="lineNum"> 27</span> : */</span>
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<span id="L28"><span class="lineNum"> 28</span> : </span>
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<span id="L29"><span class="lineNum"> 29</span> : #ifndef _GLIBCXX_ATOMICITY_H</span>
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<span id="L30"><span class="lineNum"> 30</span> : #define _GLIBCXX_ATOMICITY_H 1</span>
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<span id="L31"><span class="lineNum"> 31</span> : </span>
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<span id="L32"><span class="lineNum"> 32</span> : #pragma GCC system_header</span>
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<span id="L33"><span class="lineNum"> 33</span> : </span>
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<span id="L34"><span class="lineNum"> 34</span> : #include <bits/c++config.h></span>
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<span id="L35"><span class="lineNum"> 35</span> : #include <bits/gthr.h></span>
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<span id="L36"><span class="lineNum"> 36</span> : #include <bits/atomic_word.h></span>
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<span id="L37"><span class="lineNum"> 37</span> : #if __has_include(<sys/single_threaded.h>)</span>
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<span id="L38"><span class="lineNum"> 38</span> : # include <sys/single_threaded.h></span>
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<span id="L39"><span class="lineNum"> 39</span> : #endif</span>
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<span id="L40"><span class="lineNum"> 40</span> : </span>
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<span id="L41"><span class="lineNum"> 41</span> : namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)</span>
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<span id="L42"><span class="lineNum"> 42</span> : {</span>
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<span id="L43"><span class="lineNum"> 43</span> : _GLIBCXX_BEGIN_NAMESPACE_VERSION</span>
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<span id="L44"><span class="lineNum"> 44</span> : </span>
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<span id="L45"><span class="lineNum"> 45</span> : __attribute__((__always_inline__))</span>
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<span id="L46"><span class="lineNum"> 46</span> : inline bool</span>
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<span id="L47"><span class="lineNum"> 47</span> : __is_single_threaded() _GLIBCXX_NOTHROW</span>
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<span id="L48"><span class="lineNum"> 48</span> : {</span>
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<span id="L49"><span class="lineNum"> 49</span> : #ifndef __GTHREADS</span>
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<span id="L50"><span class="lineNum"> 50</span> : return true;</span>
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<span id="L51"><span class="lineNum"> 51</span> : #elif __has_include(<sys/single_threaded.h>)</span>
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<span id="L52"><span class="lineNum"> 52</span> <span class="tlaGNC tlaBgGNC"> 74550334 : return ::__libc_single_threaded;</span></span>
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<span id="L53"><span class="lineNum"> 53</span> : #else</span>
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<span id="L54"><span class="lineNum"> 54</span> : return !__gthread_active_p();</span>
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<span id="L55"><span class="lineNum"> 55</span> : #endif</span>
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<span id="L56"><span class="lineNum"> 56</span> : }</span>
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<span id="L57"><span class="lineNum"> 57</span> : </span>
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<span id="L58"><span class="lineNum"> 58</span> : // Functions for portable atomic access.</span>
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<span id="L59"><span class="lineNum"> 59</span> : // To abstract locking primitives across all thread policies, use:</span>
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<span id="L60"><span class="lineNum"> 60</span> : // __exchange_and_add_dispatch</span>
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<span id="L61"><span class="lineNum"> 61</span> : // __atomic_add_dispatch</span>
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<span id="L62"><span class="lineNum"> 62</span> : #ifdef _GLIBCXX_ATOMIC_BUILTINS</span>
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<span id="L63"><span class="lineNum"> 63</span> : inline _Atomic_word</span>
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<span id="L64"><span class="lineNum"> 64</span> : __attribute__((__always_inline__))</span>
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<span id="L65"><span class="lineNum"> 65</span> : __exchange_and_add(volatile _Atomic_word* __mem, int __val)</span>
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<span id="L66"><span class="lineNum"> 66</span> <span class="tlaGNC"> 36925450 : { return __atomic_fetch_add(__mem, __val, __ATOMIC_ACQ_REL); }</span></span>
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<span id="L67"><span class="lineNum"> 67</span> : </span>
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<span id="L68"><span class="lineNum"> 68</span> : inline void</span>
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<span id="L69"><span class="lineNum"> 69</span> : __attribute__((__always_inline__))</span>
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<span id="L70"><span class="lineNum"> 70</span> : __atomic_add(volatile _Atomic_word* __mem, int __val)</span>
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<span id="L71"><span class="lineNum"> 71</span> <span class="tlaGNC"> 36925448 : { __atomic_fetch_add(__mem, __val, __ATOMIC_ACQ_REL); }</span></span>
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<span id="L72"><span class="lineNum"> 72</span> : #else</span>
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<span id="L73"><span class="lineNum"> 73</span> : _Atomic_word</span>
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<span id="L74"><span class="lineNum"> 74</span> : __exchange_and_add(volatile _Atomic_word*, int) _GLIBCXX_NOTHROW;</span>
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<span id="L75"><span class="lineNum"> 75</span> : </span>
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<span id="L76"><span class="lineNum"> 76</span> : void</span>
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<span id="L77"><span class="lineNum"> 77</span> : __atomic_add(volatile _Atomic_word*, int) _GLIBCXX_NOTHROW;</span>
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<span id="L78"><span class="lineNum"> 78</span> : #endif</span>
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<span id="L79"><span class="lineNum"> 79</span> : </span>
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<span id="L80"><span class="lineNum"> 80</span> : inline _Atomic_word</span>
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<span id="L81"><span class="lineNum"> 81</span> : __attribute__((__always_inline__))</span>
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<span id="L82"><span class="lineNum"> 82</span> : __exchange_and_add_single(_Atomic_word* __mem, int __val)</span>
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<span id="L83"><span class="lineNum"> 83</span> : {</span>
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<span id="L84"><span class="lineNum"> 84</span> <span class="tlaGNC"> 699398 : _Atomic_word __result = *__mem;</span></span>
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<span id="L85"><span class="lineNum"> 85</span> <span class="tlaGNC"> 699398 : *__mem += __val;</span></span>
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<span id="L86"><span class="lineNum"> 86</span> <span class="tlaGNC"> 699398 : return __result;</span></span>
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<span id="L87"><span class="lineNum"> 87</span> : }</span>
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<span id="L88"><span class="lineNum"> 88</span> : </span>
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<span id="L89"><span class="lineNum"> 89</span> : inline void</span>
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<span id="L90"><span class="lineNum"> 90</span> : __attribute__((__always_inline__))</span>
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<span id="L91"><span class="lineNum"> 91</span> : __atomic_add_single(_Atomic_word* __mem, int __val)</span>
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<span id="L92"><span class="lineNum"> 92</span> <span class="tlaGNC"> 38 : { *__mem += __val; }</span></span>
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<span id="L93"><span class="lineNum"> 93</span> : </span>
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<span id="L94"><span class="lineNum"> 94</span> : inline _Atomic_word</span>
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<span id="L95"><span class="lineNum"> 95</span> : __attribute__ ((__always_inline__))</span>
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<span id="L96"><span class="lineNum"> 96</span> : __exchange_and_add_dispatch(_Atomic_word* __mem, int __val)</span>
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<span id="L97"><span class="lineNum"> 97</span> : {</span>
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<span id="L98"><span class="lineNum"> 98</span> <span class="tlaGNC"> 37624848 : if (__is_single_threaded())</span></span>
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<span id="L99"><span class="lineNum"> 99</span> <span class="tlaGNC"> 699398 : return __exchange_and_add_single(__mem, __val);</span></span>
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<span id="L100"><span class="lineNum"> 100</span> : else</span>
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<span id="L101"><span class="lineNum"> 101</span> <span class="tlaGNC"> 36925450 : return __exchange_and_add(__mem, __val);</span></span>
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<span id="L102"><span class="lineNum"> 102</span> : }</span>
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<span id="L103"><span class="lineNum"> 103</span> : </span>
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<span id="L104"><span class="lineNum"> 104</span> : inline void</span>
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<span id="L105"><span class="lineNum"> 105</span> : __attribute__ ((__always_inline__))</span>
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<span id="L106"><span class="lineNum"> 106</span> : __atomic_add_dispatch(_Atomic_word* __mem, int __val)</span>
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<span id="L107"><span class="lineNum"> 107</span> : {</span>
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<span id="L108"><span class="lineNum"> 108</span> <span class="tlaGNC"> 36925486 : if (__is_single_threaded())</span></span>
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<span id="L109"><span class="lineNum"> 109</span> : __atomic_add_single(__mem, __val);</span>
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<span id="L110"><span class="lineNum"> 110</span> : else</span>
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<span id="L111"><span class="lineNum"> 111</span> : __atomic_add(__mem, __val);</span>
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<span id="L112"><span class="lineNum"> 112</span> <span class="tlaGNC"> 36925486 : }</span></span>
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<span id="L113"><span class="lineNum"> 113</span> : </span>
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<span id="L114"><span class="lineNum"> 114</span> : _GLIBCXX_END_NAMESPACE_VERSION</span>
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<span id="L115"><span class="lineNum"> 115</span> : } // namespace</span>
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<span id="L116"><span class="lineNum"> 116</span> : </span>
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<span id="L117"><span class="lineNum"> 117</span> : // Even if the CPU doesn't need a memory barrier, we need to ensure</span>
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<span id="L118"><span class="lineNum"> 118</span> : // that the compiler doesn't reorder memory accesses across the</span>
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<span id="L119"><span class="lineNum"> 119</span> : // barriers.</span>
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<span id="L120"><span class="lineNum"> 120</span> : #ifndef _GLIBCXX_READ_MEM_BARRIER</span>
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<span id="L121"><span class="lineNum"> 121</span> : #define _GLIBCXX_READ_MEM_BARRIER __atomic_thread_fence (__ATOMIC_ACQUIRE)</span>
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<span id="L122"><span class="lineNum"> 122</span> : #endif</span>
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<span id="L123"><span class="lineNum"> 123</span> : #ifndef _GLIBCXX_WRITE_MEM_BARRIER</span>
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<span id="L124"><span class="lineNum"> 124</span> : #define _GLIBCXX_WRITE_MEM_BARRIER __atomic_thread_fence (__ATOMIC_RELEASE)</span>
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<span id="L125"><span class="lineNum"> 125</span> : #endif</span>
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<span id="L126"><span class="lineNum"> 126</span> : </span>
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<span id="L127"><span class="lineNum"> 127</span> : #endif </span>
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</pre>
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<table width="100%" border=0 cellspacing=0 cellpadding=0>
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<tr><td class="ruler"><img src="../../../../../glass.png" width=3 height=3 alt=""></td></tr>
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<tr><td class="versionInfo">Generated by: <a href="https://github.com//linux-test-project/lcov" target="_parent">LCOV version 2.0-1</a></td></tr>
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