DB2 needs a contiguous address space for the Shared memory area.
DB 2需要一个连续的地址空间来作为共享内存区域。
The earlier example was watching the memory that held the namestr pointer itself; therefore, the address of the watched area is given by &namestr.
先前的例子是关注支持 namestr 指针本身的内存；因此这个被关注区域是由 &namestr 提供的。
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