On 08/22/13 10:38, Thorsten Ottosen wrote: [snip]
OTOH, if only offsets were used, then wouldn't simply using the vector<char>::swap work?
Doesn't that have the same problems as memcpy'ing? That is, if we don't call the constructor, we don't get the implicit stuff inside the classes properly constructed.
OK. Maybe so. I was still under the impression that the only problem with simply copying the old std::vector<char>::data() to a new std::vector<char>::data() is that this could copy the raw pointers verbatim which would mean those raw pointers in the new std::vector<char>::data() would point somewhere still in the old std::vector<char>::data(), which would be invalid after the resize. OTOH, with offsets instead of raw pointers, the offsets would be w.r.t. the existing std::vector<char>::data(); hence, would still be valid since offsets would remain invariant. Although I haven't looked at, this looks like something that could be used: http://www.boost.org/doc/html/interprocess/offset_ptr.html (Thanks to Bjorn Reese for sending me a private email pointing to this reference). -regards,
regards
Thorsten
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