mfbt/Likely.h
author Simon Montagu <smontagu@smontagu.org>
Wed, 27 Feb 2013 09:32:53 +0200
changeset 123137 d28370e774b7fcb622a56bd79353abafff625b0b
parent 117173 4ebea4d88d4872cce65c9913492e8e2389e4e107
child 139679 f55906cadf07a9ef44cc4ce2574fe35f3dc85672
permissions -rw-r--r--
When unsetting dir=auto, don't clear the AncestorHasDirAuto flag on descendants if the parent itself has AncestorHasDirAuto set. Bug 844404, r=ehsan

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * MOZ_LIKELY and MOZ_UNLIKELY macros to hint to the compiler how a
 * boolean predicate should be branch-predicted.
 */

#ifndef mozilla_Likely_h_
#define mozilla_Likely_h_

#if defined(__clang__) || defined(__GNUC__)
#  define MOZ_LIKELY(x)   (__builtin_expect(!!(x), 1))
#  define MOZ_UNLIKELY(x) (__builtin_expect(!!(x), 0))
#else
#  define MOZ_LIKELY(x)   (!!(x))
#  define MOZ_UNLIKELY(x) (!!(x))
#endif

#endif /* mozilla_Likely_h_ */