From: Simon Marlow <simonmar@microsoft.com>
Date: Tue, 6 Mar 2007 14:31:12 +0000 (+0000)
Subject: add noDuplicate#
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;h=78c491b13bd3afea76a8bb3f30d13e417c768941;hp=78c491b13bd3afea76a8bb3f30d13e417c768941;p=ghc-hetmet.git

add noDuplicate#
This primop ensures that the current computation is not being
duplicated, by calling threadPaused().  The idea is to use it inside
unsafePerformIO/unsafeInterleaveIO (see #986).
---