mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-23 21:01:08 +00:00
16b2bfd512
Differential Revision: https://phabricator.services.mozilla.com/D59160 --HG-- extra : moz-landing-system : lando
39 lines
1.5 KiB
C++
39 lines
1.5 KiB
C++
/* -*- 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
|