From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 3 Jul 2023 15:17:04 +0000 (-0400)
Subject: compiler.h: Introduce caa_container_of_check_null
X-Git-Url: https://git.liburcu.org/?a=commitdiff_plain;h=4b3a7ebd5597b5e241c39110eb426f7832066308;hp=4b3a7ebd5597b5e241c39110eb426f7832066308;p=urcu.git

compiler.h: Introduce caa_container_of_check_null

The approach taken by caa_unqual_scalar_typeof requires use of _Generic
which requires full C11 support. Currently liburcu supports C99.
Therefore, this approach is not appropriate for now.

Instead, introduce caa_container_of_check_null which returns NULL if the
ptr is NULL before offsetting by the member offset.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I0ac1cacc67d83bd3dad6fb6cd2e6595190735441
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