pthread_spin_unlock(2)                           pthread_spin_unlock(2)

  pthread_spin_unlock()

  NAME

    pthread_spin_unlock() - unlock a spin lock

  SYNOPSIS

    #include 

    int pthread_spin_unlock(pthread_spinlock_t *lock);

  DESCRIPTION

    The pthread_spin_unlock(2) function releases a lock held by the calling
    thread on the spin lock referenced by the lock argument. The lock must be
    held by the calling thread.

  RETURN VALUES

    On success, the function returns 0; otherwise, an error code is returned.

  ERRORS

    The pthread_spin_unlock() function can fail for the following reasons:

    [EINVAL]
        The lock argument does not refer to a valid spin lock.

    [EPERM]
        The calling thread does not hold the spin lock.

    This function does not return [EINTR].

  SEE ALSO

    pthread_spin_destroy(2)

    pthread_spin_lock(2)

  USAGE NOTES

    The pthread_spin_unlock function is thread safe.

    The pthread_spin_unlock function is not async-signal safe.