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[scudo] Condition variable can be disabled by setting the flag to off (#77532)

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To enable the condition variable, you have to define both
UseConditionVariable and the ConditionVariableT. Otherwise, it'll be
disabled. However, you may want to disable the condition variable by
setting UseConditionVariable=false, for example, while measuring the
performance and you want to turn it off temporarily. Instead of
requiring the removal of the variable, examining its value makes more
sense.
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ChiaHungDuan 2024-01-10 11:03:28 -08:00 committed by GitHub
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commit e6c2952eb5
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compiler-rt/lib/scudo/standalone/condition_variable.h
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@ -51,7 +51,7 @@ struct ConditionVariableState {
template <typename Config>
struct ConditionVariableState<Config, decltype(Config::UseConditionVariable)> {
static constexpr bool enabled() { return true; }
static constexpr bool enabled() { return Config::UseConditionVariable; }
using ConditionVariableT = typename Config::ConditionVariableT;
};