remove CCAllocCache

This commit is contained in:
Simon Cruanes 2016-11-03 23:49:50 +01:00
parent d849b51892
commit 6943771bdf
4 changed files with 1 additions and 112 deletions

2
_oasis
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@ -59,7 +59,7 @@ Library "containers_data"
CCPersistentHashtbl, CCDeque, CCFQueue, CCBV, CCMixtbl, CCPersistentHashtbl, CCDeque, CCFQueue, CCBV, CCMixtbl,
CCMixmap, CCRingBuffer, CCIntMap, CCPersistentArray, CCMixmap, CCRingBuffer, CCIntMap, CCPersistentArray,
CCMixset, CCHashconsedSet, CCGraph, CCHashSet, CCBitField, CCMixset, CCHashconsedSet, CCGraph, CCHashSet, CCBitField,
CCHashTrie, CCWBTree, CCRAL, CCAllocCache, CCHashTrie, CCWBTree, CCRAL,
CCImmutArray, CCHet, CCZipper CCImmutArray, CCHet, CCZipper
BuildDepends: bytes BuildDepends: bytes
# BuildDepends: bytes, bisect_ppx # BuildDepends: bytes, bisect_ppx

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@ -70,7 +70,6 @@ such as:
Various data structures. Various data structures.
{!modules: {!modules:
CCAllocCache
CCBitField CCBitField
CCBV CCBV
CCCache CCCache

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@ -1,75 +0,0 @@
(* This file is free software, part of Logtk. See file "license" for more details. *)
(** {1 Simple Cache for Allocations} *)
module Arr = struct
type 'a t = {
caches: 'a array array;
(* 2-dim array of cached arrays. The 2-dim array is flattened into
one dimension *)
max_buck_size: int;
(* number of cached arrays per length *)
sizes: int array;
(* number of cached arrays in each bucket *)
}
let create ?(buck_size=16) n =
if n<1 then invalid_arg "AllocCache.Arr.create";
{ max_buck_size=buck_size;
sizes=Array.make n 0;
caches=Array.make (n * buck_size) [||];
}
let make c i x =
if i=0 then [||]
else if i<Array.length c.sizes then (
let bs = c.sizes.(i) in
if bs = 0 then Array.make i x
else (
(* remove last array *)
let ret = c.caches.(i * c.max_buck_size + bs-1) in
c.sizes.(i) <- bs - 1;
ret
)
) else Array.make i x
let free c a =
let n = Array.length a in
if n > 0 && n < Array.length c.sizes then (
let bs = c.sizes.(n) in
if bs < c.max_buck_size then (
(* store [a] *)
c.caches.(n * c.max_buck_size + bs) <- a;
c.sizes.(n) <- bs + 1
)
)
let with_ c i x ~f =
let a = make c i x in
try
let ret = f a in
free c a;
ret
with e ->
free c a;
raise e
end
(*$inject
let c = Arr.create ~buck_size:2 20
*)
(*$Q
Q.small_int (fun n -> Array.length (Arr.make c n '_') = n)
*)
(*$T
let a = Arr.make c 1 '_' in Array.length a = 1
let a = Arr.make c 2 '_' in Array.length a = 2
let a = Arr.make c 3 '_' in Array.length a = 3
let a = Arr.make c 4 '_' in Array.length a = 4
*)

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@ -1,35 +0,0 @@
(* This file is free software, part of Logtk. See file "license" for more details. *)
(** {1 Simple Cache for Allocations}
Be very careful not to use-after-free or double-free.
{b NOT THREAD SAFE}
{b status: experimental}
@since 0.15
*)
module Arr : sig
type 'a t
(** Cache for 'a arrays *)
val create: ?buck_size:int -> int -> 'a t
(** [create n] makes a new cache of arrays up to length [n]
@param buck_size number of arrays cached for each array length
@param n maximum size of arrays put in cache *)
val make : 'a t -> int -> 'a -> 'a array
(** [make cache i x] is like [Array.make i x],
but might return a cached array instead of allocating one.
{b NOTE}: if the array is already allocated then it
will NOT be filled with [x] *)
val free : 'a t -> 'a array -> unit
(** Return array to the cache. The array's elements will not be GC'd *)
val with_ : 'a t -> int -> 'a -> f:('a array -> 'b) -> 'b
(** Combines {!make} and {!free} *)
end