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Moses, the machine translation system
38d790cac0
The code uses two mechanisms for generating random numbers: srand()/rand(), which is not thread-safe, and srandom()/random(), which is POSIX-specific. Here I add a util/random.cc module that centralizes these calls, and unifies some common usage patterns. If the implementation is not good enough, we can now change it in a single place. To keep things simple, this uses the portable srand()/rand() but protects them with a lock to avoid concurrency problems. The hard part was to keep the regression tests passing: they rely on fixed sequences of random numbers, so a small code change could break them very thoroughly. Util::rand(), for wide types like size_t, calls std::rand() not once but twice. This behaviour was generalized into utils::wide_rand() and friends. |
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| biconcor | ||
| contrib | ||
| cruise-control | ||
| defer | ||
| doc | ||
| jam-files | ||
| lm | ||
| mert | ||
| mingw | ||
| misc | ||
| moses | ||
| moses-cmd | ||
| OnDiskPt | ||
| phrase-extract | ||
| regression-testing | ||
| scripts | ||
| search | ||
| symal | ||
| util | ||
| vw | ||
| .gitignore | ||
| .gitmodules | ||
| bjam | ||
| BUILD-INSTRUCTIONS.txt | ||
| Jamroot | ||