Sleep for a given number of microseconds.
Sleep for a given number of microseconds.Some systems lack this particularly useful function. This is how we define it (the standard way, drawn from the standard include files). This is the actual documentation of the function from the person pages:
The usleep() function suspends execution of the calling process for __usec microseconds. The sleep may be lengthened slightly by any system activity or by the time spent processing the call.