function::local_clock_us - Linux
Overview
local_clock_us is a system call that retrieves the current time in microseconds since epoch. It is intended to be used for precise timing and synchronization tasks in user-space applications.
Syntax
long local_clock_us(void);
Return Value
On success, it returns the current time in microseconds since epoch. On error, it returns -1 and sets errno to indicate the error.
Options/Flags
This command does not take any options or flags.
Examples
Get the current time in microseconds:
#include <time.h>
#include <stdio.h>
int main() {
long microseconds = local_clock_us();
printf("Current time in microseconds since epoch: %ld\n", microseconds);
return 0;
}
Common Issues
-
Incorrect usage: Ensure that the command is called correctly without any syntax errors.
-
Insufficient permissions: The user running the command must have appropriate permissions to access the system time.
-
Unsupported platform: This system call is not available on all platforms. Refer to the system documentation for availability information.
Integration
local_clock_us can be combined with other timing functions, such as gettimeofday and clock_gettime, to achieve high-precision timing and synchronization in custom applications.
Related Commands
gettimeofdayclock_gettimeclock