From edee36d00147dfaa99acf52a7b4d7ebf329b013f Mon Sep 17 00:00:00 2001
From: Enrico Tassi
Date: Thu, 26 Jun 2014 15:37:46 +0200
Subject: check_for_interrupt: better (but slower) in threading mode

Experimenting with PIDE I discovered that yield is not sufficient
to have a rescheduling, hence the delay.
---
 tactics/rewrite.ml | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'tactics/rewrite.ml')

diff --git a/tactics/rewrite.ml b/tactics/rewrite.ml
index 171b1f75a8..2e9d30dfc4 100644
--- a/tactics/rewrite.ml
+++ b/tactics/rewrite.ml
@@ -1213,9 +1213,13 @@ module Strategies =
 
     let try_ str : strategy = choice str id
 
+    let check_interrupt str e l c t r ev =
+      Control.check_for_interrupt ();
+      str  e l c t r ev
+    
     let fix (f : strategy -> strategy) : strategy =
-      let rec aux env = f (fun env -> aux env) env in aux
-
+      let rec aux env = f (fun env -> check_interrupt aux env) env in aux
+    
     let any (s : strategy) : strategy =
       fix (fun any -> try_ (seq s any))
 
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