C语言找到下一个2的幂

详情：https://seekstar.github.io/2020/03/22/c语言取二进制最高位1/

uint32_t next_pow_of_2(uint32_t x) {
	x = x | (x >> 1);
	x = x | (x >> 2);
	x = x | (x >> 4);
	x = x | (x >> 8);
	x = x | (x >> 16);
	return x + 1;
}