new repository

1 files changed, 24 insertions, 0 deletions

diff --git a/devdocs/c/atomic%2Fatomic_exchange.html b/devdocs/c/atomic%2Fatomic_exchange.html
new file mode 100644
index 00000000..d508573b
--- /dev/null
+++ b/devdocs/c/atomic%2Fatomic_exchange.html
@@ -0,0 +1,24 @@
+    <h1 id="firstHeading" class="firstHeading">atomic_exchange, atomic_exchange_explicit</h1>            <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code>&lt;stdatomic.h&gt;</code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl t-since-c11"> <td> <pre data-language="c">C atomic_exchange( volatile A* obj, C desired );</pre>
+</td> <td> (1) </td> <td> <span class="t-mark-rev t-since-c11">(since C11)</span> </td> </tr> <tr class="t-dcl t-since-c11"> <td> <pre data-language="c">C atomic_exchange_explicit( volatile A* obj, C desired, memory_order order );</pre>
+</td> <td> (2) </td> <td> <span class="t-mark-rev t-since-c11">(since C11)</span> </td> </tr>  </table> <p>Atomically replaces the value pointed by <code>obj</code> with <code>desired</code> and returns the value <code>obj</code> held previously. The operation is read-modify-write operation. The first version orders memory accesses according to <code><a href="memory_order" title="c/atomic/memory order">memory_order_seq_cst</a></code>, the second version orders memory accesses according to <code>order</code>.</p>
+<p>This is a <a href="../language/generic" title="c/language/generic">generic function</a> defined for all <a href="../language/atomic" title="c/language/atomic">atomic object types</a> <code>A</code>. The argument is pointer to a volatile atomic type to accept addresses of both non-volatile and <a href="../language/volatile" title="c/language/volatile">volatile</a> (e.g. memory-mapped I/O) atomic objects, and volatile semantic is preserved when applying this operation to volatile atomic objects. <code>C</code> is the non-atomic type corresponding to <code>A</code>.</p>
+<p>It is unspecified whether the name of a generic function is a macro or an identifier declared with external linkage. If a macro definition is suppressed in order to access an actual function (e.g. parenthesized like <code>(atomic_exchange)(...)</code>), or a program defines an external identifier with the name of a generic function, the behavior is undefined..</p>
+<h3 id="Parameters"> Parameters</h3> <table class="t-par-begin"> <tr class="t-par"> <td> obj </td> <td> - </td> <td> pointer to the atomic object to modify </td>
+</tr> <tr class="t-par"> <td> desired </td> <td> - </td> <td> the value to replace the atomic object with </td>
+</tr> <tr class="t-par"> <td> order </td> <td> - </td> <td> the memory synchronization ordering for this operation: all values are permitted </td>
+</tr>
+</table> <h3 id="Return_value"> Return value</h3> <p>The value held previously be the atomic object pointed to by <code>obj</code>.</p>
+<h3 id="References"> References</h3>  <ul>
+<li> C17 standard (ISO/IEC 9899:2018): </li>
+<ul><li> 7.17.7.3 The atomic_exchange generic functions (p: 207) </li></ul>
+<li> C11 standard (ISO/IEC 9899:2011): </li>
+<ul><li> 7.17.7.3 The atomic_exchange generic functions (p: 283) </li></ul>
+</ul>       <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="atomic_compare_exchange" title="c/atomic/atomic compare exchange"> <span class="t-lines"><span>atomic_compare_exchange_strong</span><span>atomic_compare_exchange_strong_explicit</span><span>atomic_compare_exchange_weak</span><span>atomic_compare_exchange_weak_explicit</span></span></a></div>
+<div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div> </td> <td> swaps a value with an atomic object if the old value is what is expected, otherwise reads the old value <br> <span class="t-mark">(function)</span>  </td>
+</tr> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/atomic/atomic_exchange" title="cpp/atomic/atomic exchange">C++ documentation</a></span> for <code>atomic_exchange, atomic_exchange_explicit</code> </td>
+</tr> </table>           <div class="_attribution">
+  <p class="_attribution-p">
+    &copy; cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br>
+    <a href="https://en.cppreference.com/w/c/atomic/atomic_exchange" class="_attribution-link">https://en.cppreference.com/w/c/atomic/atomic_exchange</a>
+  </p>
+</div>