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Moses, the machine translation system
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 |