From 42fcdbf1a85c8e23ccc25a0e7e66b3a51b8f11dd Mon Sep 17 00:00:00 2001 From: Valentin Rothberg Date: Tue, 7 Apr 2020 12:09:48 +0200 Subject: vendor c/image v5.4.2 Signed-off-by: Valentin Rothberg --- vendor/golang.org/x/time/rate/rate.go | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) (limited to 'vendor/golang.org/x/time') diff --git a/vendor/golang.org/x/time/rate/rate.go b/vendor/golang.org/x/time/rate/rate.go index ae93e2471..563f70429 100644 --- a/vendor/golang.org/x/time/rate/rate.go +++ b/vendor/golang.org/x/time/rate/rate.go @@ -223,7 +223,12 @@ func (lim *Limiter) Wait(ctx context.Context) (err error) { // canceled, or the expected wait time exceeds the Context's Deadline. // The burst limit is ignored if the rate limit is Inf. func (lim *Limiter) WaitN(ctx context.Context, n int) (err error) { - if n > lim.burst && lim.limit != Inf { + lim.mu.Lock() + burst := lim.burst + limit := lim.limit + lim.mu.Unlock() + + if n > burst && limit != Inf { return fmt.Errorf("rate: Wait(n=%d) exceeds limiter's burst %d", n, lim.burst) } // Check if ctx is already cancelled @@ -281,6 +286,23 @@ func (lim *Limiter) SetLimitAt(now time.Time, newLimit Limit) { lim.limit = newLimit } +// SetBurst is shorthand for SetBurstAt(time.Now(), newBurst). +func (lim *Limiter) SetBurst(newBurst int) { + lim.SetBurstAt(time.Now(), newBurst) +} + +// SetBurstAt sets a new burst size for the limiter. +func (lim *Limiter) SetBurstAt(now time.Time, newBurst int) { + lim.mu.Lock() + defer lim.mu.Unlock() + + now, _, tokens := lim.advance(now) + + lim.last = now + lim.tokens = tokens + lim.burst = newBurst +} + // reserveN is a helper method for AllowN, ReserveN, and WaitN. // maxFutureReserve specifies the maximum reservation wait duration allowed. // reserveN returns Reservation, not *Reservation, to avoid allocation in AllowN and WaitN. @@ -370,5 +392,9 @@ func (limit Limit) durationFromTokens(tokens float64) time.Duration { // tokensFromDuration is a unit conversion function from a time duration to the number of tokens // which could be accumulated during that duration at a rate of limit tokens per second. func (limit Limit) tokensFromDuration(d time.Duration) float64 { - return d.Seconds() * float64(limit) + // Split the integer and fractional parts ourself to minimize rounding errors. + // See golang.org/issues/34861. + sec := float64(d/time.Second) * float64(limit) + nsec := float64(d%time.Second) * float64(limit) + return sec + nsec/1e9 } -- cgit v1.2.3-54-g00ecf