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Review request for mesos, Benjamin Hindman and Joris Van Remoortere. Repository: mesos Description ------- The initialization synchronization logic contains three conditions, which check: 1) Was `initialize` called and is it done? 2) Was `initialize` called and is it not done? 3) Are you the first to call `initialize`? Condition (3) uses `compare_exchange_strong` between `initialized` and `false`. This returns `true` (and sets `initialized` to true) iff the caller is the first to reach that expression. The second simultaneous caller of `initialize` will either satisify condition (2) or (3) and then wait on `initializing`. For the second caller, (2) and (3) are identical because `compare_exchange_strong` between `true` and `false` will always return false, thereby putting the second caller into the waiting loop. Diffs ----- 3rdparty/libprocess/src/process.cpp a94712b9ac3b60fb047b3a5a4d84a56fa4d02313 Diff: https://reviews.apache.org/r/39949/diff/ Testing ------- `make check` Thanks, Joseph Wu
