split internal lock API out of libc.h, creating lock.h

[musl] / src / thread / pthread_setschedparam.c

#include "pthread_impl.h"
#include "lock.h"

int pthread_setschedparam(pthread_t t, int policy, const struct sched_param *param)
{
        int r;
        LOCK(t->killlock);
        r = !t->tid ? ESRCH : -__syscall(SYS_sched_setscheduler, t->tid, policy, param);
        UNLOCK(t->killlock);
        return r;
}