(**
 * Copyright (c) 2015, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the "hack" directory of this source tree.
 *
 *)

type record
type record_data

val create: unit -> record

val push_global: unit -> unit
val pop_global: unit -> record

val serialize: record -> record_data
val deserialize: record_data -> record

val track_distribution: ?record:record -> string -> bucket_size:float -> unit

val sample: ?record:record -> ?weight:float -> string -> float -> unit
val time: ?record:record -> string -> (unit -> 'a) -> 'a

val merge: ?record:record -> from:record -> unit

val get_sum: ?record:record -> string -> float option
val get_mean: ?record:record -> string -> float option
val get_count: ?record:record -> string -> float option

val print_entry_stats: ?record:record -> ?print_raw:(string -> unit) -> string -> unit
val print_stats: ?record:record -> ?print_raw:(string -> unit) -> unit -> unit
val print_entry_distribution: ?record:record -> string -> unit
val print_distributions: ?record:record -> unit -> unit
