CLOCKS_PER_SEC
From cppreference.com
C
Date and time utilities
| Functions | ||||
| Time manipulation | ||||
(C11) | ||||
(C23) | ||||
| Format conversions | ||||
(deprecated in C23)(C11) | ||||
(deprecated in C23)(C11) | ||||
(C95) | ||||
(C23)(C11) | ||||
(C23)(C11) | ||||
| Constants | ||||
CLOCKS_PER_SEC | ||||
| Types | ||||
(C11) |
| Defined in header <time.h>
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| #define CLOCKS_PER_SEC /* implementation-defined */ |
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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().
[edit] Notes
POSIX defines CLOCKS_PER_SEC as 1'000'000, 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).
[edit] References
- C23 standard (ISO/IEC 9899:2024):
- 7.27.1/2 Components of time (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.27.1/2 Components of time (p: 284)
- C11 standard (ISO/IEC 9899:2011):
- 7.27.1/2 Components of time (p: 388)
- C99 standard (ISO/IEC 9899:1999):
- 7.23.1/2 Components of time (p: 338)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.12.1 Components of time
[edit] See also
| returns raw processor clock time since the program is started (function) [edit] | |
| processor time since era type (typedef) [edit] | |
| C++ documentation for CLOCKS_PER_SEC
| |
