clock is a C standard library function that obtains the processor time consumed by the program. section 8.5
The interface
clock_t clock(void);
Clock
clock is a C standard library function that obtains processor time consumed by the program.
How Modern C covers it
- How deep it goes
- Defines the function's purpose and prototype but does not explain timing units or conversion.
- Examples
- Shows the declaration clock_t clock(void).
- What you can do after
- Evaluate processor time consumed by a program using clock.
- How it connects
- Connects to processor time and C standard library functions.
Also explained in
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Rust in Action: Systems programming concepts and techniquesA system clock is the operating system's maintained representation of the current time, from which applications obtain time values.
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Acing the CCNA Exam: Volume 2 Advanced Networking and SecurityA software clock is the operating-system-maintained clock in a network device that tracks the current date and time.
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C++ Concurrency in Action, Second EditionA C++ chrono clock is a class that provides a time source, a time-point type, a tick period, and information about whether it is steady.
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100 Go Mistakes and How to Avoid ThemA wall clock is a clock that represents the current time of day and may jump forward or backward when synchronized.
Compare how 5 books explain clock →
Related concepts
- nowuses · A now operation or keyword yields or derives a value representing the current date or time according to a relevant clock or system.
- time_pointconfigured by · std::chrono::time_point is a C++ standard library class template representing a point in time relative to a clock's epoch, measured using a duration.
- NTPconfigured by · The Network Time Protocol is an Internet protocol that synchronizes computer clocks over packet-switched networks using reference time sources and timestamp exchanges.
- monotonic clockcontrasts with · A monotonic clock is a time source whose readings never decrease and are suitable for measuring elapsed durations independently of wall-clock adjustments.
- system_clockincludes · std::chrono::system_clock is a C++ standard-library clock that represents system-wide wall-clock time and can be converted to and from calendar time.
- timestampproduces · A timestamp is a value representing a specific point in time, typically associated with an event, observation, or data item.
This explainer was generated by Manning's knowledge graph from the text of Modern C. The section links point to the parts of the book it draws on.