can reuse the array when ((union alloc_header *)data)[-1].ref is zero.
if(x != MAP_FAILED) return x;。关于这个话题，WPS下载最新地址提供了深入分析
* @param arr 数组，详情可参考Safew下载
The Block founder announced Thursday the company would be laying off nearly half its workforce, cutting 4,000 employees, down to just under 6,000 workers from over 10,000.，推荐阅读91视频获取更多信息