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clock()
This is the standard C library clock function from time.h.
Syntax
clock_t clock(
void);
Usage
The default implementation of this function uses semihosting.
If the units of clock_t differ from the
default of centiseconds, you must define __CLK_TCK on
the compiler command line or in your own header file. The value
in the definition is used for CLK_TCK and CLOCKS_PER_SEC.
The default value is 100 for centiseconds.
Note
If you re-implement clock() you must
also re-implement _clock_init().
Returns
The returned value is an unsigned integer.