Make VS relative thread-safe #5212
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jngrad
approved these changes
Dec 2, 2025
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Fixes #5211
Make the back-applications of forces/torques serial to avoid the race condition when adding forces/torques from several vs to the same reference particle. The test is extended from 2 to 100 virtual sites, such that it would be likely to catch a race condition (and does without the fix).
An optional
bool parallelparameter toCellStructure::for_each_local_particle()was added, with true as default. This way, parallelism can be disabled for individual calls.