mfbt/Likely.h@deefc01c0e14
mfbt/Likely.h
Thu, 15 Jan 2015 21:03:48 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 21:03:48 +0100
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
- permissions
- -rw-r--r--
Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 /*
8 * MOZ_LIKELY and MOZ_UNLIKELY macros to hint to the compiler how a
9 * boolean predicate should be branch-predicted.
10 */
12 #ifndef mozilla_Likely_h
13 #define mozilla_Likely_h
15 #if defined(__clang__) || defined(__GNUC__)
16 # define MOZ_LIKELY(x) (__builtin_expect(!!(x), 1))
17 # define MOZ_UNLIKELY(x) (__builtin_expect(!!(x), 0))
18 #else
19 # define MOZ_LIKELY(x) (!!(x))
20 # define MOZ_UNLIKELY(x) (!!(x))
21 #endif
23 #endif /* mozilla_Likely_h */
