Intel TBB 提供高并发的容器类，Windows或者Linux线程能使用这些容器类或者和基于task编程相结合(TBB)。
concurrent_hash_map<Key,T,HashCompare>是一个hash表，允许并行访问，表是一个从Key到类型T的映射，类型HashCompare定义怎样hash一个Key和怎样比较2个Key。
concurrent_hash_map is a class template for an unordered associative container that holds key-value pairs with unique keys and supports concurrent insertion, lookup, and erasure.
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