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There are also other smart pointers, like std::'s weak ptr and proprietary stuff. You can avoid multi-ownership problems of shared ptrs with weak pointer membe

by clnq 4y ago

There are also other smart pointers, like std::'s weak ptr and proprietary stuff. You can avoid multi-ownership problems of shared ptrs with weak pointer member variables (which only need to be turned into shared in a given {} scope). Some other problems can be solved by marking objects as pending kill without destroying them immediately and ensuring all threads finish access before actual deletion. Unreal Engine uses both weak pointers and object marking in a global object array. It also uses GC but that's besides the point. Would the same approach to modern memory management not help Android?

UncleMeat 4y ago
Of course there are designs that help prevent bugs. Chrome is doing plenty of stuff like this but the ownership and lifetime design for something like a JIT are complex as hell and problems happen. We've got like 30 years of people insisting that it really is possible to write safe C and C++ programs if you just follow the One True Way (TM) and its never been the case. Each new One True Way helps, but it sure as hell doesn't solve the problem altogether.