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|
(*
* Copyright (c) 2013 Jeremy Yallop.
*
* This file is distributed under the terms of the MIT License.
* See the file LICENSE for details.
*)
[@@@warning "-33-35"]
open Ctypes
open OUnit2
open Foreign
let () =
(* temporary workaround due to flexlink limitations *)
if Sys.os_type = "Win32" then
ignore (Dl.(dlopen ~filename:"../clib/clib.so" ~flags:[RTLD_NOW]))
let callback_with_pointers = Foreign.foreign "passing_pointers_to_callback"
~release_runtime_lock:true
(Foreign.funptr ~runtime_lock:true
(ptr int @-> ptr int @-> returning int) @-> returning int)
module Common_tests(S : Cstubs.FOREIGN with type 'a result = 'a
and type 'a return = 'a) =
struct
module M = Functions.Stubs(S)
(*
Ensure that passing ~release_runtime_lock releases the runtime lock.
*)
let test_release_runtime_lock _ =
begin
M.initialize_waiters ();
let t1 = Thread.create M.post1_wait2 () in
let t2 = Thread.create M.post2_wait1 () in
Thread.join t1;
Thread.join t2;
end
end
module Foreign_tests = Common_tests(struct
type 'a fn = 'a Ctypes.fn
type 'a return = 'a
let (@->) = Ctypes.(@->)
let returning = Ctypes.returning
type 'a result = 'a
let foreign name fn = Foreign.foreign name fn
~release_runtime_lock:true
let foreign_value name fn = Foreign.foreign_value name fn
end)
module Stub_tests = Common_tests(Generated_bindings)
(*
Ensure that passing ~runtime_lock to funptr causes a callback to acquire
the runtime lock.
*)
let test_acquire_runtime_lock _ =
begin
let f x y = let _ = Gc.full_major () in !@x + !@y in
let t1 = Thread.create Gc.full_major () in
assert (callback_with_pointers f = 7);
Thread.join t1
end
(*
Acquire the runtime lock in a callback while other threads execute OCaml
code.
*)
let test_acquire_runtime_lock_parallel _ =
begin
let r = ref None in
let g size n =
for i = 0 to n do
r := Some (CArray.make float size ~initial:0.0);
Thread.yield ();
done
in
let f x y = let _ = Gc.compact () in !@x + !@y in
let threads = ref [] in
for i = 0 to 10 do
threads := Thread.create (g 100) 10000 :: !threads;
done;
for i = 0 to 10 do
assert (callback_with_pointers f = 7);
Thread.yield ();
done;
List.iter Thread.join !threads;
end
(*
Ensure that threads created by external code are registered with
caml_c_thread_register
*)
let create_threads_that_call_back =
Foreign.foreign "foreign_thread_registration_test"
(Foreign.funptr ~thread_registration:true ~runtime_lock:true
(uint64_t @-> returning void) @-> uint @-> uint @->
returning int)
~release_runtime_lock:true
let test_register_thread _ =
begin
(* number of threads to create *)
let n_threads = 25 in
(* how often each thread calls back *)
let n_callback = 3 in
let protect =
let m = Mutex.create () in
fun f ->
Mutex.lock m;
let r = try f () with x -> Mutex.unlock m; raise x in
Mutex.unlock m;
r
in
let rs = Random.State.make_self_init () in
let htl_res = Hashtbl.create (succ n_threads) in
let cb d =
let cnt,delay = protect @@ fun () ->
let c = try Hashtbl.find htl_res d with Not_found -> 0 in
Hashtbl.replace htl_res d (succ c);
let d = Random.State.float rs 0.1 in
c,d
in
Thread.delay (if cnt <> 0 then delay else delay +. 0.2)
in
let un_threads = Unsigned.UInt.of_int n_threads in
let un_callback = Unsigned.UInt.of_int n_callback in
let result =
if create_threads_that_call_back cb un_threads un_callback <> 0 then
false
else if Hashtbl.length htl_res <> succ n_threads then
false
else
Hashtbl.fold ( fun _k v ac ->
if v = n_callback then ac else false
) htl_res true
in
OUnit2.assert_equal true result
end
let suite = "Thread tests" >:::
["test_release_runtime_lock (foreign)"
>:: Foreign_tests.test_release_runtime_lock;
"test_release_runtime_lock (stubs)"
>:: Stub_tests.test_release_runtime_lock;
"test_acquire_runtime_lock (foreign)"
>:: test_acquire_runtime_lock;
"test_acquire_runtime_lock_parallel (foreign)"
>:: test_acquire_runtime_lock_parallel;
"test_register_thread (foreign)"
>:: test_register_thread;
]
let _ =
run_test_tt_main suite
|
