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

[musl] / src / thread / __lock.c

#include "pthread_impl.h"

void __lock(volatile int *l)
{
        while (a_swap(l, 1)) __wait(l, l+1, 1, 1);
}

void __unlock(volatile int *l)
{
        a_store(l, 0);
        if (l[1]) __wake(l, 1, 1);
}