mfbt/Likely.h
author Felipe Gomes <felipc@gmail.com>
Tue, 12 Jun 2012 17:47:40 -0300
changeset 99917 621324aea1931c103f34bef2537c64e0829317b4
parent 92606 17c65d32c7b891e70435561b965b71c355bd28ac
child 100672 1a0f4431003105008d31616e75b8db2d3291d54f
permissions -rw-r--r--
Bug 761516. Rename webapprt/linux to webapprt/gtk2 as we are building for all gtk2 platforms. r=marco a=gavin

/* 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 Likely_h_
#define Likely_h_

#if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 2))
#  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 /* Likely_h_ */