80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_ipc_Neutering_h
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#define mozilla_ipc_Neutering_h
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#include "mozilla/GuardObjects.h"
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/**
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* This header declares RAII wrappers for Window neutering. See
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* WindowsMessageLoop.cpp for more details.
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*/
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namespace mozilla {
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namespace ipc {
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/**
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* This class is a RAII wrapper around Window neutering. As long as a
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* NeuteredWindowRegion object is instantiated, Win32 windows belonging to the
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* current thread will be neutered. It is safe to nest multiple instances of
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* this class.
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*/
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class MOZ_RAII NeuteredWindowRegion
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{
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public:
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explicit NeuteredWindowRegion(bool aDoNeuter MOZ_GUARD_OBJECT_NOTIFIER_PARAM);
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~NeuteredWindowRegion();
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/**
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* This function clears any backlog of nonqueued messages that are pending for
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* the current thread.
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*/
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void PumpOnce();
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private:
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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bool mNeuteredByThis;
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};
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/**
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* This class is analagous to MutexAutoUnlock for Mutex; it is an RAII class
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* that is to be instantiated within a NeuteredWindowRegion, thus temporarily
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* disabling neutering for the remainder of its enclosing block.
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* @see NeuteredWindowRegion
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*/
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class MOZ_RAII DeneuteredWindowRegion
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{
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public:
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DeneuteredWindowRegion(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM);
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~DeneuteredWindowRegion();
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private:
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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bool mReneuter;
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};
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class MOZ_RAII SuppressedNeuteringRegion
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{
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public:
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SuppressedNeuteringRegion(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM);
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~SuppressedNeuteringRegion();
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static inline bool IsNeuteringSuppressed() { return sSuppressNeutering; }
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private:
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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bool mReenable;
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static bool sSuppressNeutering;
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};
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} // namespace ipc
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} // namespace mozilla
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#endif // mozilla_ipc_Neutering_h
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