mfbt/Likely.h
author Geoff Brown <gbrown@mozilla.com>
Mon, 06 May 2019 18:53:55 +0000
changeset 472757 7a580c406283099dae7a2abcc483e16f17d6d51f
parent 454538 5f4630838d46dd81dadb13220a4af0da9e23a619
permissions -rw-r--r--
Bug 1545226 - Enable some android gtests in netwerk/test/gtest/parse-ftp; r=jmaher With changes from bug 1548555, one of the gtests previously disabled on Android can be re-enabled, but most of the tests in netwerk/test/gtest are still problematic (some won't build for me). Differential Revision: https://phabricator.services.mozilla.com/D30081

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 */