Defined in header <time.h> | ||
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#define CLOCKS_PER_SEC /*implementation defined*/ |
Expands to an expression (not necessarily a compile-time constant) of type clock_t equal to the number of clock ticks per second, as returned by clock().
POSIX defines CLOCKS_PER_SEC as one million, regardless of the actual precision of clock.
Until standardized as CLOCKS_PER_SEC in C89, this macro was sometimes known by its IEEE std 1003.1-1988 name CLK_TCK: that name was not included in C89 and was removed from POSIX itself in 1996 over ambiguity with _SC_CLK_TCK, which gives number of clocks per second for the function times()).
| returns raw processor clock time since the program is started (function) |
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| processor time since era type (typedef) |
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C++ documentation for CLOCKS_PER_SEC |
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