363 int devfs_alloc_unique_number (struct unique_numspace *space)  in devfs_alloc_unique_number()  argument
369     spin_lock (&space->init_lock);  in devfs_alloc_unique_number()
370     if (!space->sem_initialised)  in devfs_alloc_unique_number()
372 	sema_init (&space->semaphore, 1);  in devfs_alloc_unique_number()
373 	space->sem_initialised = 1;  in devfs_alloc_unique_number()
375     spin_unlock (&space->init_lock);  in devfs_alloc_unique_number()
376     down (&space->semaphore);  in devfs_alloc_unique_number()
377     if (space->num_free < 1)  in devfs_alloc_unique_number()
381 	if (space->length < 16) length = 16;  in devfs_alloc_unique_number()
382 	else length = space->length << 1;  in devfs_alloc_unique_number()
385 	    up (&space->semaphore);  in devfs_alloc_unique_number()
388 	if (space->bits != NULL)  in devfs_alloc_unique_number()
390 	    memcpy (bits, space->bits, space->length);  in devfs_alloc_unique_number()
391 	    vfree (space->bits);  in devfs_alloc_unique_number()
393 	space->num_free = (length - space->length) << 3;  in devfs_alloc_unique_number()
394 	space->bits = bits;  in devfs_alloc_unique_number()
395 	memset (bits + space->length, 0, length - space->length);  in devfs_alloc_unique_number()
396 	space->length = length;  in devfs_alloc_unique_number()
398     number = find_first_zero_bit (space->bits, space->length << 3);  in devfs_alloc_unique_number()
399     --space->num_free;  in devfs_alloc_unique_number()
400     __set_bit (number, space->bits);  in devfs_alloc_unique_number()
401     up (&space->semaphore);  in devfs_alloc_unique_number()
415 void devfs_dealloc_unique_number (struct unique_numspace *space, int number)  in devfs_dealloc_unique_number()  argument
420     down (&space->semaphore);  in devfs_dealloc_unique_number()
421     was_set = __test_and_clear_bit (number, space->bits);  in devfs_dealloc_unique_number()
422     if (was_set) ++space->num_free;  in devfs_dealloc_unique_number()
423     up (&space->semaphore);  in devfs_dealloc_unique_number()