How to Create High-Resolution Timers in Linux with C ?
Nov 13, 2024 pm 02:39 PMHigh-Resolution Timers in Linux with C
In the Windows operating system, QueryPerformanceCounter from the mmsystem.h header provides an efficient way to create high-resolution timers. This functionality is often sought after in C development for various purposes. However, a comparable solution is required in Linux for similar timing needs.
POSIX Clock and Boost ptime
To create high-resolution timers in Linux, C developers can utilize two primary approaches:
- POSIX clock_gettime() Function: This function is part of the POSIX standard and offers a way to obtain the current time with nanosecond precision. It can be accessed using the following code:
#include <time.h> void get_time() { timespec ts; clock_gettime(CLOCK_REALTIME, &ts); printf("Current time: %ld.%ld seconds\n", ts.tv_sec, ts.tv_nsec); }
- Boost ptime Library: The Boost C library provides a comprehensive ptime library for handling time-related tasks. It includes the high_resolution_clock class, which offers nanosecond-level resolution. Here's an example using Boost ptime:
#include <boost/date_time/posix_time/posix_time_types.hpp> void get_time() { boost::posix_time::ptime now = boost::posix_time::microsec_clock::local_time(); printf("Current time: %ld.%ld seconds\n", now.date().time_of_day().hours(), now.date().time_of_day().fractional_seconds()); }
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