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| author | Craig Jennings <c@cjennings.net> | 2024-04-07 13:41:34 -0500 |
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| committer | Craig Jennings <c@cjennings.net> | 2024-04-07 13:41:34 -0500 |
| commit | 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 (patch) | |
| tree | f1190704f78f04a2b0b4c977d20fe96a828377f1 /devdocs/c/program%2Fsig_atomic_t.html | |
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diff --git a/devdocs/c/program%2Fsig_atomic_t.html b/devdocs/c/program%2Fsig_atomic_t.html new file mode 100644 index 00000000..f791b620 --- /dev/null +++ b/devdocs/c/program%2Fsig_atomic_t.html @@ -0,0 +1,41 @@ + <h1 id="firstHeading" class="firstHeading">sig_atomic_t</h1> <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code><signal.h></code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl"> <td class="t-dcl-nopad"> <pre data-language="c">typedef /* unspecified */ sig_atomic_t;</pre> +</td> <td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> </table> <p>An integer type which can be accessed as an atomic entity even in the presence of asynchronous interrupts made by signals.</p> +<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include <signal.h> +#include <stdio.h> + +volatile sig_atomic_t gSignalStatus = 0; + +void signal_handler(int status) +{ + gSignalStatus = status; +} + +int main(void) +{ + /* Install a signal handler. */ + signal(SIGINT, signal_handler); + + printf("SignalValue: %d\n", gSignalStatus); + printf("Sending signal: %d\n", SIGINT); + raise(SIGINT); + printf("SignalValue: %d\n", gSignalStatus); +}</pre></div> <p>Possible output:</p> +<div class="text source-text"><pre data-language="c">SignalValue: 0 +Sending signal: 2 +SignalValue: 2</pre></div> </div> <h3 id="References"> References</h3> <ul> +<li> C17 standard (ISO/IEC 9899:2018): </li> +<ul><li> 7.14/2 Signal handling <signal.h> (p: 194-195) </li></ul> +<li> C11 standard (ISO/IEC 9899:2011): </li> +<ul><li> 7.14/2 Signal handling <signal.h> (p: 265) </li></ul> +<li> C99 standard (ISO/IEC 9899:1999): </li> +<ul><li> 7.14/2 Signal handling <signal.h> (p: 246) </li></ul> +<li> C89/C90 standard (ISO/IEC 9899:1990): </li> +<ul><li> 4.7 SIGNAL HANDLING <signal.h> </li></ul> +</ul> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="signal" title="c/program/signal"> <span class="t-lines"><span>signal</span></span></a></div> </td> <td> sets a signal handler for particular signal <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/utility/program/sig_atomic_t" title="cpp/utility/program/sig atomic t">C++ documentation</a></span> for <code>sig_atomic_t</code> </td> +</tr> </table> <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/program/sig_atomic_t" class="_attribution-link">https://en.cppreference.com/w/c/program/sig_atomic_t</a> + </p> +</div> |