From: Simon Marlow <marlowsd@gmail.com>
Date: Tue, 15 Jun 2010 11:27:20 +0000 (+0000)
Subject: Add a note about the interruptibility of throwTo.
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;ds=sidebyside;h=cdd378d922a7bc4995c21643bf5d4d19581692ab;p=ghc-base.git

Add a note about the interruptibility of throwTo.
---

diff --git a/GHC/Conc.lhs b/GHC/Conc.lhs
index c1b2107..ec6e064 100644
--- a/GHC/Conc.lhs
+++ b/GHC/Conc.lhs
@@ -310,7 +310,8 @@ In the paper, 'throwTo' is non-blocking; but the library implementation adopts
 a more synchronous design in which 'throwTo' does not return until the exception
 is received by the target thread.  The trade-off is discussed in Section 9 of the paper.
 Like any blocking operation, 'throwTo' is therefore interruptible (see Section 5.3 of
-the paper).
+the paper).  Unlike other interruptible operations, however, 'throwTo'
+is /always/ interruptible, even if it does not actually block.
 
 There is no guarantee that the exception will be delivered promptly,
 although the runtime will endeavour to ensure that arbitrary