Shared memory can give strong performance advantages that the alternatives don't have. You pay for this in implementation complexity. Each can decide how much h

Shared memory can give strong performance advantages that the alternatives don't have. You pay for this in implementation complexity. Each can decide how much he or she wants to pay. The price could be lowered by some trivially better support functions. Why for example C++0x doesn't have lockless concurrent containers in the standard library is beyond me.