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#include <semaphore.h>
#include <limits.h>
#include <errno.h>
int sem_init(sem_t *sem, int pshared, unsigned value)
{
if (value > SEM_VALUE_MAX) {
errno = EINVAL;
return -1;
}
sem->__val[0] = value;
sem->__val[1] = 0;
sem->__val[2] = pshared ? 0 : 128;
return 0;
}