mirror of
https://github.com/cmclark00/retro-imager.git
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57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
/*
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* SPDX-License-Identifier: Apache-2.0
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* Copyright (C) 2020 Raspberry Pi (Trading) Limited
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*/
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#include "powersaveblocker.h"
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#include <QDebug>
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#include <string>
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PowerSaveBlocker::PowerSaveBlocker(QObject *parent) :
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QObject(parent), _stayingAwake(false)
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{
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}
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PowerSaveBlocker::~PowerSaveBlocker()
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{
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if (_stayingAwake)
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removeBlock();
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}
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void PowerSaveBlocker::applyBlock(const QString &reason)
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{
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if (_stayingAwake)
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return;
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#ifdef Q_OS_WIN
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REASON_CONTEXT rc;
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std::wstring wreason = reason.toStdWString();
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rc.Version = POWER_REQUEST_CONTEXT_VERSION;
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rc.Flags = POWER_REQUEST_CONTEXT_SIMPLE_STRING;
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rc.Reason.SimpleReasonString = (wchar_t *) wreason.c_str();
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_powerRequest = PowerCreateRequest(&rc);
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if (_powerRequest == INVALID_HANDLE_VALUE)
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{
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qDebug() << "Error creating power request:" << GetLastError();
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return;
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}
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_stayingAwake = PowerSetRequest(_powerRequest, PowerRequestDisplayRequired);
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if (!_stayingAwake)
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{
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qDebug() << "Error running PowerSetRequest():" << GetLastError();
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}
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#endif
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}
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void PowerSaveBlocker::removeBlock()
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{
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if (!_stayingAwake)
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return;
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#ifdef Q_OS_WIN
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PowerClearRequest(_powerRequest, PowerRequestDisplayRequired);
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CloseHandle(_powerRequest);
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#endif
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}
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