clock_settime()

Set clock to a specified value 

clock_gettime()

Get value of clock 

clock_getres()

Get resolution of clock 

nanosleep()

Delay the current thread with high resolution 

timer_create()

Create a timer 

timer_delete()

Delete a timer 

timer_settime()

Set and arm or disarm a timer 

timer_gettime()

Get remaining interval for an active timer 

timer_getoverrun()

Get current overrun count for a timer