mfbt/Likely.h@97036ab72558
mfbt/Likely.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
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 */
