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[C++0x] fix lock_guard's adopt_lock_t constructor

From: Jonathan Wakely <jwakely dot gcc at gmail dot com>
To: "libstdc++" <libstdc++ at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Tue, 2 Mar 2010 23:02:06 +0000
Subject: [C++0x] fix lock_guard's adopt_lock_t constructor

2010-03-02  Jonathan Wakely  <jwakely.gcc@gmail.com>

        * include/std/mutex (lock_guard::lock_guard): Do not lock mutex when
        adopt_lock_t constructor is used.
        * testsuite/30_threads/lock_guard/cons/1.cc: New.

Tested Linux/x86_64 and committed.

Attachment: adopt_lock.txt
Description: Text document

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