source: azure_iot_hub/trunk/musl-1.1.18/src/thread/sem_getvalue.c@ 389

#include <semaphore.h>

int sem_getvalue(sem_t *restrict sem, int *restrict valp)
{
        int val = sem->__val[0];
        *valp = val < 0 ? 0 : val;
        return 0;
}