From ac409f51f185a4654f9a5c38ab5d1652824836f6 Mon Sep 17 00:00:00 2001 From: Gael Guennebaud Date: Tue, 7 Jan 2014 20:17:59 +0100 Subject: Document the fact that Random and setRandom are not reentrant (so not thread-safe) --- doc/TopicMultithreading.dox | 2 ++ 1 file changed, 2 insertions(+) (limited to 'doc/TopicMultithreading.dox') diff --git a/doc/TopicMultithreading.dox b/doc/TopicMultithreading.dox index f7d082668..fb944af29 100644 --- a/doc/TopicMultithreading.dox +++ b/doc/TopicMultithreading.dox @@ -39,6 +39,8 @@ int main(int argc, char** argv) } \endcode +\warning note that all functions generating random matrices are \b not re-entrant nor thread-safe. Those include DenseBase::Random(), and DenseBase::setRandom() despite a call to Eigen::initParallel(). This is because these functions are based on std::rand which is not re-entrant. For thread-safe random generator, we recommend the use of boost::random of c++11 random feature. + In the case your application is parallelized with OpenMP, you might want to disable Eigen's own parallization as detailed in the previous section. */ -- cgit v1.2.3