| <html lang="en"> |
| <head> |
| <title>clock - Untitled</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="Untitled"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Timefns.html#Timefns" title="Timefns"> |
| <link rel="prev" href="asctime.html#asctime" title="asctime"> |
| <link rel="next" href="ctime.html#ctime" title="ctime"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="clock"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="ctime.html#ctime">ctime</a>, |
| Previous: <a rel="previous" accesskey="p" href="asctime.html#asctime">asctime</a>, |
| Up: <a rel="up" accesskey="u" href="Timefns.html#Timefns">Timefns</a> |
| <hr> |
| </div> |
| |
| <h3 class="section">8.2 <code>clock</code>—cumulative processor time</h3> |
| |
| <p><a name="index-clock-430"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <time.h> |
| clock_t clock(void); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| Calculates the best available approximation of the cumulative amount |
| of time used by your program since it started. To convert the result |
| into seconds, divide by the macro <code>CLOCKS_PER_SEC</code>. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| The amount of processor time used so far by your program, in units |
| defined by the machine-dependent macro <code>CLOCKS_PER_SEC</code>. If no |
| measurement is available, the result is (clock_t)<code>-1</code>. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| ANSI C requires <code>clock</code> and <code>CLOCKS_PER_SEC</code>. |
| |
| <p>Supporting OS subroutine required: <code>times</code>. |
| |
| <p><br> |
| |
| </body></html> |
| |
