On Tue, 2017-03-14 at 12:34 +0200, Grazvydas Ignotas wrote: > It's not a good practice to srand() in libraries [1]. Not sure what > to > suggest though, maybe rand_r() but "POSIX.1-2008 marks rand_r() as > obsolete". Maybe somebody else (Emil?) has some ideas? > > [1] http://stackoverflow.com/questions/14883035/problems-of-using-sra > nd-in-libraries
You just need to ensure it's (re)seeded with something unique to avoid reusing the same generated sequence over different processes or threads that have called srand(time(NULL)) within the same second due to the second granularity of time(). srand(time(NULL) + getpid() + clock()); Would be pretty unique. Don't think there is anyway to determine if srand has been previously called so calling it once only in a library is the only option. -- Alan. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
