diff options
| author | Craig Jennings <c@cjennings.net> | 2024-04-07 13:41:34 -0500 |
|---|---|---|
| committer | Craig Jennings <c@cjennings.net> | 2024-04-07 13:41:34 -0500 |
| commit | 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 (patch) | |
| tree | f1190704f78f04a2b0b4c977d20fe96a828377f1 /devdocs/c/atomic%2Fatomic_lock_free_consts.html | |
new repository
Diffstat (limited to 'devdocs/c/atomic%2Fatomic_lock_free_consts.html')
| -rw-r--r-- | devdocs/c/atomic%2Fatomic_lock_free_consts.html | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/devdocs/c/atomic%2Fatomic_lock_free_consts.html b/devdocs/c/atomic%2Fatomic_lock_free_consts.html new file mode 100644 index 00000000..ad4bd120 --- /dev/null +++ b/devdocs/c/atomic%2Fatomic_lock_free_consts.html @@ -0,0 +1,27 @@ + <h1 id="firstHeading" class="firstHeading">ATOMIC_*_LOCK_FREE</h1> <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code><stdatomic.h></code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl t-since-c11"> <td> <pre data-language="c">#define ATOMIC_BOOL_LOCK_FREE /* implementation-defined */ +#define ATOMIC_CHAR_LOCK_FREE /* implementation-defined */ +#define ATOMIC_CHAR16_T_LOCK_FREE /* implementation-defined */ +#define ATOMIC_CHAR32_T_LOCK_FREE /* implementation-defined */ +#define ATOMIC_WCHAR_T_LOCK_FREE /* implementation-defined */ +#define ATOMIC_SHORT_LOCK_FREE /* implementation-defined */ +#define ATOMIC_INT_LOCK_FREE /* implementation-defined */ +#define ATOMIC_LONG_LOCK_FREE /* implementation-defined */ +#define ATOMIC_LLONG_LOCK_FREE /* implementation-defined */ +#define ATOMIC_POINTER_LOCK_FREE /* implementation-defined */</pre> +</td> <td class="t-dcl-nopad"> </td> <td> <span class="t-mark-rev t-since-c11">(since C11)</span> </td> </tr> <tr class="t-dcl t-since-c23"> <td> <pre data-language="c">#define ATOMIC_CHAR8_T_LOCK_FREE /* implementation-defined */</pre> +</td> <td class="t-dcl-nopad"> </td> <td> <span class="t-mark-rev t-since-c23">(since C23)</span> </td> </tr> </table> <p>Expands to <a href="../language/constant_expression" title="c/language/constant expression">preprocessor constant expressions</a> that evaluate to either <code>0</code>, <code>1</code>, or <code>2</code> which indicate the lock-free property of the corresponding <a href="../thread#Atomic_operations" title="c/thread">atomic types</a> (both signed and unsigned).</p> +<table class="t-dsc-begin"> <tr class="t-dsc-hitem"> <th> Value </th> <th> Explanation </th> +</tr> <tr class="t-dsc"> <td> <code>0</code> </td> <td> The atomic type is never lock-free </td> +</tr> <tr class="t-dsc"> <td> <code>1</code> </td> <td> The atomic type is sometimes lock-free </td> +</tr> <tr class="t-dsc"> <td> <code>2</code> </td> <td> The atomic type is always lock-free </td> +</tr> </table> <h3 id="References"> References</h3> <ul> +<li> C17 standard (ISO/IEC 9899:2018): </li> +<ul><li> 7.17.1/3 atomic lock-free macros (p: 200) </li></ul> +<li> C11 standard (ISO/IEC 9899:2011): </li> +<ul><li> 7.17.1/3 atomic lock-free macros (p: 273) </li></ul> +</ul> <div class="_attribution"> + <p class="_attribution-p"> + © 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_LOCK_FREE_consts" class="_attribution-link">https://en.cppreference.com/w/c/atomic/ATOMIC_LOCK_FREE_consts</a> + </p> +</div> |