C++单例模式及其析构

最新推荐文章于 2024-03-13 15:49:01 发布

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#Qt #Singleton #Destory

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本文介绍了一个使用Qt库中的QMutex实现静态互斥锁管理的C++类。该类确保了对共享资源的安全访问，并通过析构函数自动清理互斥锁资源，避免资源泄露。

utilities.h

=====================================================

#ifndef UTILITIES_H
#define UTILITIES_H

#include <QMutex>

class Utilities
{
public:
static QMutex *getRegisterMutex();

private:
Utilities();

private:
static QMutex *m_mutex;
static int m_fd;

class Garbo
{
public:
~Garbo()
{
if (Utilities::m_mutex)
{
delete Utilities::m_mutex;
}

}

};

static Garbo m_garbo;
};

#endif // UTILITIES_H

utilities.cpp

=====================================================

#include "utilities.h"

QMutex *Utilities::m_mutex = 0;

Utilities::Utilities()
{
}

QMutex* Utilities::getRegisterMutex()
{
if (!m_mutex)
{
m_mutex = new QMutex();
}

return m_mutex;
}