From 4f262d6540281487f79870aff589ca92f5d2f6c6 Mon Sep 17 00:00:00 2001
From: Sébastien Dailly <sebastien@chimrod.com>
Date: Wed, 16 Dec 2020 14:39:42 +0100
Subject: Initial commit

---
 events/dune      |  7 +++++++
 events/timer.ml  | 24 ++++++++++++++++++++++++
 events/timer.mli |  7 +++++++
 3 files changed, 38 insertions(+)
 create mode 100755 events/dune
 create mode 100755 events/timer.ml
 create mode 100755 events/timer.mli

(limited to 'events')

diff --git a/events/dune b/events/dune
new file mode 100755
index 0000000..68e2dd2
--- /dev/null
+++ b/events/dune
@@ -0,0 +1,7 @@
+(library
+ (name events)
+ (libraries 
+   brr
+   brr.note
+   )
+)
diff --git a/events/timer.ml b/events/timer.ml
new file mode 100755
index 0000000..def9a81
--- /dev/null
+++ b/events/timer.ml
@@ -0,0 +1,24 @@
+type t = Brr.G.timer_id ref * unit Note.E.send
+
+let create
+  : unit -> (t * unit Note.E.t)
+  = fun () ->
+    let event, send = Note.E.create () in
+    (ref (-1), send), event
+
+let stop
+  : t -> unit
+  = fun (id, _) ->
+    Brr.G.stop_timer !id
+
+let start
+  : t -> float -> unit
+  = fun (id, send) d ->
+
+    Brr.G.stop_timer !id;
+    let timer_id = Brr.G.set_interval
+        ~ms:(int_of_float @@ d *. 1000.)
+        (fun () -> send ()) in
+    ignore @@ Brr.G.set_timeout ~ms:0 send;
+    id:= timer_id;
+
diff --git a/events/timer.mli b/events/timer.mli
new file mode 100755
index 0000000..4bf8a9b
--- /dev/null
+++ b/events/timer.mli
@@ -0,0 +1,7 @@
+type t
+
+val create : unit -> t * unit Note.E.t
+
+val start: t -> float -> unit
+
+val stop: t -> unit
-- 
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