library/cpp/retry/utils.cpp


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#include "utils.h" 
 
#include <util/random/random.h> 
 
TDuration NRetryPrivate::AddRandomDelta(TDuration maxDelta) {
    if (maxDelta == TDuration::Zero()) { 
        return TDuration::Zero();
    } 
 
    const TDuration delta = TDuration::MicroSeconds(RandomNumber(2 * maxDelta.MicroSeconds())); 
    return delta - maxDelta;
} 

TDuration NRetryPrivate::AddIncrement(ui32 attempt, TDuration increment) {
    return TDuration::MicroSeconds(attempt * increment.MicroSeconds());
}

TDuration NRetryPrivate::AddExponentialMultiplier(ui32 attempt, TDuration exponentialMultiplier) {
    return TDuration::MicroSeconds((1ull << Min(63u, attempt)) * exponentialMultiplier.MicroSeconds());
}