From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Date: Sat, 6 Nov 2010 19:09:29 +0000 (-0400)
Subject: Add compiler barriers to read-side for mutex ordering
X-Git-Tag: v0.5.0~6
X-Git-Url: https://git.lttng.org/?p=urcu.git;a=commitdiff_plain;h=42a3f1f99827c1bd73270966d4fffd6157809a7c;hp=42a3f1f99827c1bd73270966d4fffd6157809a7c

Add compiler barriers to read-side for mutex ordering

Ensure that mutex acquisition/release is not reordered wrt rcu read lock/unlock.
No impact in practice because pthreads lock/unlock primitives act as memory
barriers. But we should provide the same guarantees we are expecting from other
locking primitives, hence this modification.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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