layout/style/ServoUtils.h
author Xianzhu Wang <wangxianzhu@chromium.org>
Tue, 05 Mar 2019 12:18:01 +0000
changeset 464575 4325ba7b38576495a78289c2a8f4dff391922e66
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1529059 [wpt PR 15420] - [BlinkGenPropertyTrees] Initiailize double_sided of synthetic effect, a=testonly Automatic update from web-platform-tests [BlinkGenPropertyTrees] Initiailize double_sided of synthetic effect Previously synthetic effects always had double_sided==false, causing the layer disappear when the backface was facing forward. Bug: 928190 Change-Id: I35534b40346d5c5918bc99c00a4ca6b4e3b68796 Reviewed-on: https://chromium-review.googlesource.com/c/1475815 Reviewed-by: Philip Rogers <pdr@chromium.org> Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org> Cr-Commit-Position: refs/heads/master@{#632764} -- wpt-commits: a89467050deaf1dcbd9140a2f0670b1b85e518ee wpt-pr: 15420

/* -*- 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/. */

/* some utilities for Gecko to use for Servo initialization and assertions */

#ifndef mozilla_ServoUtils_h
#define mozilla_ServoUtils_h

#include "mozilla/Assertions.h"
#include "mozilla/TypeTraits.h"
#include "MainThreadUtils.h"

namespace mozilla {

// Defined in GeckoBindings.cpp.
void InitializeServo();
void ShutdownServo();
void AssertIsMainThreadOrServoFontMetricsLocked();

class ServoStyleSet;
extern ServoStyleSet* sInServoTraversal;
inline bool IsInServoTraversal() {
  // The callers of this function are generally main-thread-only _except_
  // for potentially running during the Servo traversal, in which case they may
  // take special paths that avoid writing to caches and the like. In order
  // to allow those callers to branch efficiently without checking TLS, we
  // maintain this static boolean. However, the danger is that those callers
  // are generally unprepared to deal with non-Servo-but-also-non-main-thread
  // callers, and are likely to take the main-thread codepath if this function
  // returns false. So we assert against other non-main-thread callers here.
  MOZ_ASSERT(sInServoTraversal || NS_IsMainThread());
  return sInServoTraversal;
}
}  // namespace mozilla

#endif  // mozilla_ServoUtils_h