Struct timespec
struct timespec is a C structure type representing a time value with integral seconds and a fractional nanosecond component.
Modern C, Third Edition
struct timespec is a C structure type representing a time value with seconds and a nanosecond component.
- How it is used
- Represents time values when the one-second granularity of time_t is insufficient.
- How deep it goes
- Defines the two fields and their value ranges, then connects the type to acquisition, resolution, and difference operations.
- Examples
- Uses a declaration listing tv_sec and tv_nsec, plus timespec_get and timespec_getres function prototypes.
- What you can do after
- Apply it via timespec_get to obtain nanosecond-precision time values and implement portable differences between them.
Modern C
struct timespec is a C structure type that represents a time interval or timestamp with integral seconds and fractional nanoseconds.
- How it is used
- Represents timestamps or intervals when second-level time_t precision is insufficient.
- How deep it goes
- Defines nanosecond precision and timespec_get usage, but does not explain representation or arithmetic internals.
- Examples
- Uses a timespec_get declaration and contrasts wall-clock, monotonic, and processor-time clocks.
- What you can do after
- Operate timespec_get with TIME_UTC to obtain a timestamp containing nanosecond precision.
Related concepts
- timespec_getused by · timespec_get is a C standard library function that obtains calendar time for a specified time base and stores it in a struct timespec object.
- longhas part · A long is a language-designated integer type whose precision, range, and representation are defined by the language or implementation.
- structkind of · A struct is a composite data type or structure that groups related fields or values into a single unit.
- time_thas part · time_t is an implementation-defined C arithmetic type used to represent calendar time or elapsed-time values.
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