Change priority of the current process in C

On Windows I can do:

HANDLE hCurrentProcess = GetCurrentProcess();

SetPriorityClass(hCurrentProcess, ABOVE_NORMAL_PRIORITY_CLASS);

How can I do the same thing on *nix?

Try:

#include <sys/time.h>
#include <sys/resource.h>

int main(){
    setpriority(PRIO_PROCESS, 0, -20);
}

Note that you must be running as superuser for this to work.

(for more info, type 'man setpriority' at a prompt.)