From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Fri, 18 Jun 2010 16:26:20 +0000 (-0400)
Subject: Force build failure on unknown architectures
X-Git-Tag: v0.4.5~2
X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=commitdiff_plain;h=c53cf27f54bfb914e874ddb82a54653b6ccee276;hp=c53cf27f54bfb914e874ddb82a54653b6ccee276

Force build failure on unknown architectures

Create urcu/arch_unknown.h and urcu/uatomic_arch_unknown.h, which
contain only #error statements and explanatory comments.  This forces
build failures on unrecognized architectures in preference to trying
to guess at what operations might be safe on such architectures.

One other semi-feasible alternative is to use hashed arrays of locks
that are acquired with signals disabled.  However, this seems a bit
too ornate, especially for architectures for which the gcc __sync_
primitives work correctly.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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