Is armadillo C++ matrix thread safe

Question

Armadillo is a C++ linear algebra library. I wonder if its implementation is thread safe? For example, I have a matrix A, and there are 2 threads modifying it. I looked at its documentation but this is not mentioned.

For all C++ libraries... if it isn't mentioned, it's probably not thread safe. — Alessandro Pezzato, Sep 04 '14 at 08:09
Related: [Is armadillo solve() thread safe?](http://stackoverflow.com/questions/30063240/is-armadillo-solve-thread-safe) — Brent Bradburn, Oct 22 '15 at 00:29

score 3 · Accepted Answer · answered Sep 04 '14 at 08:58

You can safely assume that everything is not thread-safe by default, unless stated otherwise.

This is because thread-safety adds overhead (locking) that would penalize single-threaded usage for no good reason. E.g. you can use a matrix in a multi-threaded application without ever sharing it with other threads.

Is armadillo C++ matrix thread safe

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