mirror of
https://github.com/c-cube/ocaml-containers.git
synced 2025-12-06 11:15:31 -05:00
removed useless Lwt-related module
This commit is contained in:
Simon Cruanes
parent
7d3fd8a45a
commit
78ff35154b
5 changed files with 3 additions and 401 deletions
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@ -169,12 +169,7 @@ access to elements by their index.
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- `Future`, a set of tools for preemptive threading, including a thread pool,
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monadic futures, and MVars (concurrent boxes)
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Some serialisation formats are also implemented, with a streaming, non-blocking
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interface that allows the user to feed the input in chunk by chunk (useful
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in combination with Lwt/Async). Currently, the modules are:
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- `Bencode`, for the [B-encode format](http://en.wikipedia.org/wiki/Bencode),
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- `Sexp`, for S-expressions.
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- `containers.lwt` contains [Lwt](http://ocsigen.org/lwt/)-related modules (experimental)
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There is a QuickCheck-like library called `QCheck` (now in its own repo).
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12
_oasis
12
_oasis
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@ -120,13 +120,13 @@ Library "containers_thread"
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Library "containers_lwt"
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Path: lwt
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Modules: Behavior, Lwt_automaton, Lwt_actor
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Modules: Lwt_automaton, Lwt_actor
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Pack: true
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FindlibName: lwt
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FindlibParent: containers
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Build$: flag(lwt) && flag(misc)
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Install$: flag(lwt) && flag(misc)
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BuildDepends: containers, lwt, lwt.unix, containers.misc
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BuildDepends: containers, lwt, containers.misc
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Library "containers_cgi"
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Path: cgi
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@ -185,14 +185,6 @@ Executable test_levenshtein
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MainIs: test_levenshtein.ml
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BuildDepends: containers,qcheck,containers.string
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Executable test_lwt
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Path: tests/lwt/
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Install: false
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CompiledObject: best
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Build$: flag(tests) && flag(lwt)
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MainIs: test_Behavior.ml
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BuildDepends: containers,lwt,lwt.unix,oUnit,containers.lwt
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Executable test_threads
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Path: tests/lwt/
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Install: false
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164
lwt/behavior.ml
164
lwt/behavior.ml
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@ -1,164 +0,0 @@
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(*
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Copyright (c) 2013, Simon Cruanes
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer. Redistributions in binary
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form must reproduce the above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other materials provided with
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the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*)
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(** {1 Behavior Trees for React} *)
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(** {2 Behavior tree} *)
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type tree =
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| Test of (unit -> bool) (* call and test value *)
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| Wait of (unit -> bool Lwt.t) (* wait for the future to complete *)
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| Do of (unit -> bool) (* perform an action *)
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| If of (unit -> bool) * tree * tree (* switch *)
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| Sequence of bool * tree list (* yield to subtrees sequentially. bool: loop? *)
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| Select of select_strategy * tree list (* select one subtree *)
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| Parallel of parallel_strategy * tree list (* run all subtrees in parallel *)
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| Closure of (unit -> tree) (* build a tree dynamically *)
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| Succeed (* always succeed *)
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| Fail (* always fail *)
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(** A behavior tree *)
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and select_strategy = tree list -> (unit -> tree option)
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(** How to select a subtree to run. It yields a subtree until it
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decides to fail *)
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and parallel_strategy =
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| PSForall (** succeeds when all subtrees succeed *)
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| PSExists (** succeeds when some subtree succeeds *)
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let strategy_inorder l =
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let cur = ref l in
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fun () -> match !cur with
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| [] -> None
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| t::l' ->
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cur := l';
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Some t
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let strategy_random ?(proba_fail=0.05) l =
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let a = Array.of_list l in
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fun () ->
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if Random.float 1. < proba_fail
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then None
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else (* choose in array *)
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let t = a.(Random.int (Array.length a)) in
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Some t
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let succeed = Succeed
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let fail = Fail
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let test f = Test f
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let wait fut = Wait (fun () -> fut)
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let wait_ fut = Wait (fun () -> Lwt.bind fut (fun () -> Lwt.return_true))
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let wait_closure f = Wait f
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let timeout f = Wait (fun () -> Lwt.bind (Lwt_unix.sleep f) (fun () -> Lwt.return_false))
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let delay f = Wait (fun () -> Lwt.bind (Lwt_unix.sleep f) (fun () -> Lwt.return_true))
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let do_ act = Do act
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let do_succeed act = Do (fun () -> act (); true)
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let if_ s then_ else_ = If (s, then_, else_)
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let when_ s t = if_ s t succeed
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let while_ f l = Sequence (true, (test f) :: l)
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let sequence ?(loop=false) l =
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assert (l <> []);
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Sequence (loop, l)
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let repeat t = sequence ~loop:true [t]
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let select ?(strat=strategy_inorder) l =
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assert (l <> []);
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Select (strat, l)
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let or_else t1 t2 =
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select ~strat:strategy_inorder [t1; t2]
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let parallel ?(strat=PSForall) l =
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assert (l <> []);
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Parallel (strat, l)
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let closure f =
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Closure f
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(** {2 Run a tree} *)
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type result = bool Lwt.t
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let run tree =
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let (>>=) = Lwt.(>>=) in
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(* run given tree *)
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let rec run tree =
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match tree with
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| Test f -> Lwt.return (f ())
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| Wait f -> f ()
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| Do act -> if act () then Lwt.return_true else Lwt.return_false
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| If (s, then_, else_) -> (* depends on value returned by [s] *)
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if s () then run then_ else run else_
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| Sequence (loop, l) -> run_sequence ~loop l
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| Select (strat, l) -> run_select ~strat l
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| Parallel (strat, l) -> run_parallel ~strat l
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| Closure f -> let tree' = f () in run tree'
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| Succeed -> Lwt.return_true
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| Fail -> Lwt.return_false
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and run_sequence ~loop start =
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let rec process l = match l with
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| [] when loop -> run_sequence ~loop start
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| [] -> Lwt.return_true (* success *)
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| t::l' ->
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let res_t = run t in
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res_t >>= fun t_succeeded ->
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if t_succeeded
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then process l'
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else Lwt.return_false
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in
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process start
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and run_select ~strat l =
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(* choice function *)
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let choose = strat l in
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(* try a subtree *)
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let rec try_one () =
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match choose () with
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| None -> Lwt.return_false (* failure *)
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| Some t ->
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run t >>= fun t_succeeded ->
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if t_succeeded
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then Lwt.return_true
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else try_one ()
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in
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try_one ()
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and run_parallel ~strat l =
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let results = List.map run l in
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match strat with
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| PSExists -> Lwt_list.exists_p (fun x -> x) results
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| PSForall -> Lwt_list.for_all_p (fun x -> x) results
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in
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run tree
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142
lwt/behavior.mli
142
lwt/behavior.mli
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@ -1,142 +0,0 @@
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(*
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Copyright (c) 2013, Simon Cruanes
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer. Redistributions in binary
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form must reproduce the above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other materials provided with
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the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*)
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(** {1 Behavior Trees for Lwt} *)
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(** Behavior trees are a modular alternative to state machines for controlling
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dynamic behavior in time. They are primarily used in video games to
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implement non-player AI.
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A tree is composed of basic actions, basic tests, and combinators. During
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execution, some subset of the nodes of a tree may be {b running}; at some
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point the execution of a given node will terminate with either
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{b success} or {b failure}. Depending on the kind of node, this result
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may propagate to parent nodes, or set other nodes running.
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For instance, a {i sequence} node runs its subtrees one by one. If a
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subtree succeeds, the next one is activated; if it fails, the whole
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sequence will fail.
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Here, we build them on top of
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{{: http://ocsigen.org/lwt/} Lwt}.
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Documentation source:
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{{: http://aigamedev.com/open/article/bt-overview/} aigamedev (and links)}
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*)
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(** {2 Behavior tree} *)
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(** A behavior tree *)
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type tree = private
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| Test of (unit -> bool) (* call and test value *)
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| Wait of (unit -> bool Lwt.t) (* wait for the future to complete *)
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| Do of (unit -> bool) (* perform an action *)
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| If of (unit -> bool) * tree * tree (* switch *)
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| Sequence of bool * tree list (* yield to subtrees sequentially. bool: loop? *)
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| Select of select_strategy * tree list (* select one subtree *)
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| Parallel of parallel_strategy * tree list (* run all subtrees in parallel *)
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| Closure of (unit -> tree) (* build a tree dynamically *)
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| Succeed (* always succeed *)
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| Fail (* always fail *)
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and select_strategy = tree list -> (unit -> tree option)
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(** How to select a subtree to run. It may yield a different result each
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time it is called. *)
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and parallel_strategy =
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| PSForall (** succeeds when all subtrees succeed *)
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| PSExists (** succeeds when some subtree succeeds (kill the others) *)
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val strategy_inorder : select_strategy
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(** Select subnodes one after the other, then fails *)
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val strategy_random : ?proba_fail:float -> select_strategy
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(** Randomly chooses a subtree. May fail at each point with
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a probability of [proba_fail]. *)
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val succeed : tree
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(** Behavior that always succeeds *)
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val fail : tree
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(** Behavior that always fails *)
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val test : (unit -> bool) -> tree
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(** Fails or succeeds based on the next occurrence of the event *)
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val wait : bool Lwt.t -> tree
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(** Returns the same result as the future *)
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val wait_ : unit Lwt.t -> tree
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(** Wait for the future to complete, then succeed *)
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val wait_closure : (unit -> bool Lwt.t) -> tree
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val timeout : float -> tree
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(** Fails after the given amount of seconds *)
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val delay : float -> tree
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(** Wait for the given amount of seconds, then succeed *)
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val do_ : (unit -> bool) -> tree
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(** Perform an action, then succeed iff it returned true *)
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val do_succeed : (unit -> unit) -> tree
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(** Perform an action and succeed (unless it raises an exception) *)
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val if_ : (unit -> bool) -> tree -> tree -> tree
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(** Conditional choice, based on the current value of the signal *)
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val when_ : (unit -> bool) -> tree -> tree
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(** Run the given tree if the signal is true, else succeed *)
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val while_ : (unit -> bool) -> tree list -> tree
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(** While the signal is true, run the subtrees *)
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val sequence : ?loop:bool -> tree list -> tree
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(** Sequence of sub-trees to run *)
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val repeat : tree -> tree
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(** Repeat the same tree indefinitely *)
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val select : ?strat:select_strategy -> tree list -> tree
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(** Choice among the subtrees. The strategy defines in which order subtrees
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are tried. *)
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val or_else : tree -> tree -> tree
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(** Binary choice, favoring the left one *)
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val parallel : ?strat:parallel_strategy -> tree list -> tree
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(** Run subtrees in parallel (default strat: PSForall) *)
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val closure : (unit -> tree) -> tree
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(** Produce a tree dynamically, at each call. *)
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(** {2 Run a tree} *)
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type result = bool Lwt.t
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val run : tree -> result
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(** Run the tree. It returns a {! result}, which wraps
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either true (success) or false (failure). *)
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@ -1,79 +0,0 @@
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open OUnit
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module B = Behavior
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let lwt_get fut = match Lwt.state fut with
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| Lwt.Sleep
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| Lwt.Fail _ -> None
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| Lwt.Return x -> Some x
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let test_do () =
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let r = ref false in
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let t = B.do_succeed (fun () -> r := true) in
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let res = B.run t in
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OUnit.assert_equal true !r;
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OUnit.assert_equal (Some true) (lwt_get res);
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()
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let test_seq () =
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let l = ref [] in
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(* add int to [l] *)
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let add x = l := x :: !l in
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let t = B.sequence
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[ B.do_ (fun () -> add 3; true);
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B.do_ (fun () -> add 2; true);
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B.test (fun () -> List.length !l = 2);
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B.do_ (fun () -> add 1; true);
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] in
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let res = B.run t in
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OUnit.assert_equal [1;2;3] !l;
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OUnit.assert_equal (Some true) (lwt_get res);
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()
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let test_wait () =
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let e, send_e = Lwt.wait () in
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let t = B.run (B.sequence [B.wait_ e; B.succeed]) in
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OUnit.assert_equal None (lwt_get t);
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Lwt.wakeup send_e ();
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OUnit.assert_equal (Some true) (lwt_get t);
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()
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let test_parallel () =
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(* forall fails *)
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let e, send_e = Lwt.wait () in
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let t =
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B.parallel ~strat:B.PSForall
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[ B.sequence [B.wait_ e; B.succeed];
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B.fail
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] in
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let t = B.run t in
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let res = Lwt_main.run
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(let open Lwt in
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choose [t; Lwt_unix.sleep 0.1 >>= fun () -> (Lwt.wakeup send_e (); return true)])
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in
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OUnit.assert_equal false res;
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(* exists succeeds *)
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let e, send_e = Lwt.wait () in
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let t =
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B.parallel ~strat:B.PSExists
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[ B.sequence [B.wait_ e; B.succeed];
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B.fail
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] in
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let t = B.run t in
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let res = Lwt_main.run
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(let open Lwt in
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choose [t; Lwt_unix.sleep 0.1 >>= fun () -> (Lwt.wakeup send_e ();
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Lwt_unix.sleep 0.1 >>= (fun () -> return true))])
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in
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OUnit.assert_equal true res;
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()
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let suite =
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"test_behavior" >:::
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[ "test_do" >:: test_do;
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"test_seq" >:: test_seq;
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"test_wait" >:: test_wait;
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"test_parallel" >:: test_parallel;
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]
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