摘要：
c++中的new会返回NULL空指针吗 "https://stackoverflow.com/questions/3389420/will new operator return null" On a standards conforming C++ implementation, no. The 阅读全文
摘要：
"https://stackoverflow.com/questions/4424193/what happens to mutex when the thread which acquired it exits?noredirect=1&lq=1" 解释当一个lock了mutex的线程退出了，却没 阅读全文