Differential D3091 Diff 7495 src/solid/devices/backends/win/winutils_p.h

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src/solid/devices/backends/win/winutils_p.h

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		1		/*
		2		Copyright 2016 Kevin Funk <kfunk@kde.org>
		3
		4		This library is free software; you can redistribute it and/or
		5		modify it under the terms of the GNU Lesser General Public
		6		License as published by the Free Software Foundation; either
		7		version 2.1 of the License, or (at your option) version 3, or any
		8		later version accepted by the membership of KDE e.V. (or its
		9		successor approved by the membership of KDE e.V.), which shall
		10		act as a proxy defined in Section 6 of version 3 of the license.
		11
		12		This library is distributed in the hope that it will be useful,
		13		but WITHOUT ANY WARRANTY; without even the implied warranty of
		14		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		15		Lesser General Public License for more details.
		16
		17		You should have received a copy of the GNU Lesser General Public
		18		License along with this library. If not, see <http://www.gnu.org/licenses/>.
		19		*/
		20
		21		#ifndef WINUTILS_P_H
		22		#define WINUTILS_P_H
		23
		24		#include "windevicemanager.h" // for qGetLastError
		25
		26		#include <qt_windows.h>
		27
		28		/**
		29		* @brief RAII class for blocking Windows from reporting errors
		30		*
		31		* Internally calls GetThreadErrorMode + SetErrorMode. This class stores the
		32		* current error mode on construction and disables certain error reportings
		33		* during the life time of this object
		34		*
		35		* @code
		36		* {
		37		* WinErrorBlocker blocker; // custom error mode is set
		38		* // Your Windows API calls...
		39		* } // end of scope: original error mode is restored
		40		* @endcode
		41		*
		42		* Note that qstorageinfo_win.cpp (qtbase) does something similar to silence errors
		43		*
		44		* See MSDN documentation: https://msdn.microsoft.com/en-us/library/windows/desktop/dd553630(v=vs.85).aspx
		45		*/
		46		class WinErrorBlocker
		47		{
		48		public:
		49		WinErrorBlocker()
		50		{
		51		if (!::SetThreadErrorMode(SEM_FAILCRITICALERRORS \| SEM_NOOPENFILEERRORBOX, &m_oldmode)) {
		52		qWarning() << "Failed to call SetThreadErrorMode:" << qGetLastError();
		53		}
		54		}
		55		~WinErrorBlocker()
		56		{
		57		if (!::SetThreadErrorMode(m_oldmode, NULL)) {
		58		qWarning() << "Failed to call SetThreadErrorMode:" << qGetLastError();
		59		}
		60		}
		61
		62		private:
		63		Q_DISABLE_COPY(WinErrorBlocker)
		64		DWORD m_oldmode;
		65		};
		66
		67		#endif