fix async thread cancellation stack alignment

[musl] / src / thread / pthread_barrier_destroy.c

#include "pthread_impl.h"

int pthread_barrier_destroy(pthread_barrier_t *b)
{
        if (b->_b_limit < 0) {
                if (b->_b_lock) {
                        int v;
                        a_or(&b->_b_lock, INT_MIN);
                        while ((v = b->_b_lock) & INT_MAX)
                                __wait(&b->_b_lock, 0, v, 0);
                }
                __vm_wait();
        }
        return 0;
}