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std::timespec_get(3) C++ Standard Libary std::timespec_get(3) NAME std::timespec_get - std::timespec_get Synopsis Defined in header <ctime> int timespec_get( std::timespec* ts, int base ); (1) (since C++17) #define TIME_UTC /* implementation-defined */ (2) (since C++17) 1) Modifies the std::timespec object pointed to by ts to hold the current calendar time in the time base base. 2) Expands to a value suitable for use as the base argument of std::timespec_get Other macro constants beginning with TIME_ may be provided by the implementation to indicate additional time bases If base is TIME_UTC, then * ts->tv_sec is set to the number of seconds since an implementa- tion defined epoch, truncated to a whole value * ts->tv_nsec member is set to the integral number of nanoseconds, rounded to the resolution of the system clock Parameters ts - pointer to an object of type std::timespec base - TIME_UTC or another nonzero integer value indicating the time base Return value The value of base if successful, zero otherwise. Notes The POSIX function clock_gettime(CLOCK_REALTIME, ts) may also be used to populate a std::timespec with the time since the Epoch. Example // Run this code #include <iostream> #include <ctime> int main() { std::timespec ts; std::timespec_get(&ts, TIME_UTC); char buf[100]; std::strftime(buf, sizeof buf, "%D %T", std::gmtime(&ts.tv_sec)); std::cout << "Current time: " << buf << '.' << ts.tv_nsec << " UTC\n"; } Possible output: Current time: 06/24/16 20:07:42.949494132 UTC See also timespec time in seconds and nanoseconds (C++17) (struct) time returns the current time of the system as time since epoch (function) http://cppreference.com 2022.07.31 std::timespec_get(3)
NAME | Synopsis | Parameters | Return value | Notes | Example | Possible output: | See also
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