minor locking optimizations

[musl] / src / thread / pthread_mutexattr_setpshared.c

#include "pthread_impl.h"

int pthread_mutexattr_setpshared(pthread_mutexattr_t *a, int pshared)
{
        if (pshared > 1U) return EINVAL;
        *a &= 0x7fffffff;
        *a |= pshared<<31;
        return 0;
}