49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
/*
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* Copyright (C) by Michael Schuster <michael.schuster@nextcloud.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "SimpleNamedMutex.h"
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SimpleNamedMutex::SimpleNamedMutex(const std::wstring &name)
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{
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_name = name;
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}
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bool SimpleNamedMutex::lock()
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{
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if (_name.empty() || _hMutex) {
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return false;
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}
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// Mutex
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_hMutex = CreateMutex(nullptr, TRUE, _name.data());
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if (GetLastError() == ERROR_ALREADY_EXISTS) {
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CloseHandle(_hMutex);
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_hMutex = nullptr;
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return false;
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}
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return true;
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}
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void SimpleNamedMutex::unlock()
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{
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// Release mutex
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if (_hMutex) {
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ReleaseMutex(_hMutex);
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CloseHandle(_hMutex);
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_hMutex = nullptr;
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}
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}
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