通过对死锁检测程序设计来进一步理解死锁检测的实现原理，通过对进程、资源和对进程资源的操作（即请求、获取、释放），对每一个系统状态都可以用一张进程资源图来表示，通过进程资源图进行死锁检测。-Through to the deadlock detection procedure designed to achieve a better understanding of deadlock detection principle, through the process, resources and operational resources to the process (that request, acquire, release), on each system state can use a process of resource map to express, through the process of resource plans for deadlock detection.