44  * Due to the first byte in a stream of bytes being more costly on
46  * amortize the cost of the first byte.
58  * of the first byte on nRF52.
125 	uint32_t first, available;  in rng_pool_get()  local
130 	first = rngp->first_alloc;  in rng_pool_get()
133 	 * The other_read_in_progress is non-zero if rngp->first_read != first,  in rng_pool_get()
137 	other_read_in_progress = (rngp->first_read ^ first);  in rng_pool_get()
139 	available = (last - first) & mask;  in rng_pool_get()
148 	rngp->first_alloc = (first + len) & mask;  in rng_pool_get()
152 		*dst++ = rngp->buffer[first];  in rng_pool_get()
153 		first = (first + 1) & mask;  in rng_pool_get()
178 	uint8_t first = rngp->first_read;  in rng_pool_put()  local
183 	if (((last - first) & mask) == mask) {  in rng_pool_put()