使用std :: string键增强共享内存中的无序映射

Question

Is it possible to use std::string or other complex structure key type with boost unordered map on shared memory? If so, can I find some sample code? I found some sample code for using unordered map on shared memory but were unable to change the key type to complex structure. Thanks

Answer 1

Yes.

You can see an example here:

• Boost interprocess unordered_map compilation

You will want to watch the overhead when doing lookups. Using non-standard key equality/hash functions can solve this:

• want to efficiently overcome mismatch between key types in a map in Boost.Interprocess shared memory

  Note that that answer concerns itself with ordered containers