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/* -*- 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/. */
#ifndef mozilla_ipc_Neutering_h
#define mozilla_ipc_Neutering_h
#include "mozilla/GuardObjects.h"
/**
* This header declares RAII wrappers for Window neutering. See
* WindowsMessageLoop.cpp for more details.
*/
namespace mozilla {
namespace ipc {
/**
* This class is a RAII wrapper around Window neutering. As long as a
* NeuteredWindowRegion object is instantiated, Win32 windows belonging to the
* current thread will be neutered. It is safe to nest multiple instances of
* this class.
*/
class MOZ_RAII NeuteredWindowRegion
{
public:
explicit NeuteredWindowRegion(bool aDoNeuter MOZ_GUARD_OBJECT_NOTIFIER_PARAM);
~NeuteredWindowRegion();
/**
* This function clears any backlog of nonqueued messages that are pending for
* the current thread.
*/
void PumpOnce();
private:
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
bool mNeuteredByThis;
};
/**
* This class is analagous to MutexAutoUnlock for Mutex; it is an RAII class
* that is to be instantiated within a NeuteredWindowRegion, thus temporarily
* disabling neutering for the remainder of its enclosing block.
* @see NeuteredWindowRegion
*/
class MOZ_RAII DeneuteredWindowRegion
{
public:
DeneuteredWindowRegion(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM);
~DeneuteredWindowRegion();
private:
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
bool mReneuter;
};
class MOZ_RAII SuppressedNeuteringRegion
{
public:
SuppressedNeuteringRegion(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM);
~SuppressedNeuteringRegion();
static inline bool IsNeuteringSuppressed() { return sSuppressNeutering; }
private:
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
bool mReenable;
static bool sSuppressNeutering;
};
} // namespace ipc
} // namespace mozilla
#endif // mozilla_ipc_Neutering_h
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