From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 16:29:10 +0200 Subject: Adding upstream version 86.0.1. Signed-off-by: Daniel Baumann --- layout/style/ServoUtils.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 layout/style/ServoUtils.h (limited to 'layout/style/ServoUtils.h') diff --git a/layout/style/ServoUtils.h b/layout/style/ServoUtils.h new file mode 100644 index 0000000000..5c8df84fec --- /dev/null +++ b/layout/style/ServoUtils.h @@ -0,0 +1,38 @@ +/* -*- 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 "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 -- cgit v1.2.3