Marc Glisse bf0a42d740 lock-like protection for update_exact ... The exact choice of memory_order_* is hard, and even for versions that seem to work on x86_64 TSAN complains like crazy. TODO: a version that, instead of blocking if another thread is updating, also does the computation, with suitable protection to ensure that pruning the tree cannot happen while anyone is computing on it. TODO: try having AT in Lazy instead of Lazy_rep (i.e. not shared) to avoid the indirection. We can possibly choose one or the other depending on the type.		2020-11-13 19:39:24 +01:00
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CGAL	lock-like protection for update_exact	2020-11-13 19:39:24 +01:00