package core_kernel

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A Throttled_rate_limiter combines a Token_bucket and a Throttle. Unlike a Token_bucket, jobs cannot consume variable numbers of tokens, but the number of outstanding jobs is also limited to max_concurrent_jobs. Like a Throttle, finish_job must be called once, and only once, when a job is completed.

type t = private limiter
val create_exn : now:Core_kernel.Time_ns.t -> burst_size:int -> sustained_rate_per_sec:float -> max_concurrent_jobs:int -> t
val try_start_job : t -> now:Core_kernel.Time_ns.t -> [ `Start | `Max_concurrent_jobs_running | `Unable_until_at_least of Core_kernel.Time_ns.t ]
val finish_job : t -> now:Core_kernel.Time_ns.t -> unit
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