rework langinfo code for ABI compat and for use by time code

[musl] / src / thread / pthread_setschedprio.c

#include "pthread_impl.h"

int pthread_setschedprio(pthread_t t, int prio)
{
        int r;
        __lock(t->killlock);
        r = t->dead ? ESRCH : -__syscall(SYS_sched_setparam, t->tid, &prio);
        __unlock(t->killlock);
        return r;
}