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FengJungle 2019-10-20 19:00:21 +08:00
parent 28da931795
commit 72d156e4c0
6 changed files with 0 additions and 166 deletions
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6.SingletonPattern/1.Picture/单例模式.vsdx
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33
6.SingletonPattern/2.Code/Singleton.h
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#ifndef __SINGLETON_H__
#define __SINGLETON_H__
#include <iostream>
#include <string.h>
#include <mutex>
using namespace std;
class Singleton
{
public:
static Singleton* getInstance(){
if (instance == NULL){
m_mutex.lock();
if (instance == NULL){
printf("´´½¨ÐµÄʵÀý\n");
instance = new Singleton();
}
m_mutex.unlock();
}
return instance;
}
private:
Singleton(){}
static Singleton* instance;
static std::mutex m_mutex;
};
Singleton* Singleton::instance = NULL;
std::mutex Singleton::m_mutex;
#endif //__SINGLETON_H__

33
6.SingletonPattern/2.Code/Singleton/Singleton.h
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#ifndef __SINGLETON_H__
#define __SINGLETON_H__
#include <iostream>
#include <string.h>
#include <mutex>
using namespace std;
class Singleton
{
public:
static Singleton* getInstance(){
if (instance == NULL){
m_mutex.lock();
if (instance == NULL){
printf("´´½¨ÐµÄʵÀý\n");
instance = new Singleton();
}
m_mutex.unlock();
}
return instance;
}
private:
Singleton(){}
static Singleton* instance;
static std::mutex m_mutex;
};
Singleton* Singleton::instance = NULL;
std::mutex Singleton::m_mutex;
#endif //__SINGLETON_H__

50
6.SingletonPattern/2.Code/Singleton/main.cpp
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#include <iostream>
#include "Singleton.h"
/*单例模式简单实现*/
/*
int main()
{
Singleton *s1 = Singleton::getInstance();
Singleton *s2 = Singleton::getInstance();
system("pause");
return 0;
}
*/
/*非线程安全 单例模式*/
#include <process.h>
#include <Windows.h>
//多线程，线程数目：5
#define THREAD_NUM 5
unsigned int __stdcall CallSingleton(void *pPM)
{
Singleton *s = Singleton::getInstance();
int nThreadNum = *(int *)pPM;
Sleep(50);
//printf("线程编号为%d\n", nThreadNum);
return 0;
}
int main()
{
HANDLE handle[THREAD_NUM];
//线程编号
int threadNum = 0;
while (threadNum < THREAD_NUM)
{
handle[threadNum] = (HANDLE)_beginthreadex(NULL, 0, CallSingleton, &threadNum, 0, NULL);
//等子线程接收到参数时主线程可能改变了这个i的值
threadNum++;
}
//保证子线程已全部运行结束
WaitForMultipleObjects(THREAD_NUM, handle, TRUE, INFINITE);
system("pause");
return 0;
}

50
6.SingletonPattern/2.Code/main.cpp
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@ -1,50 +0,0 @@
#include <iostream>
#include "Singleton.h"
/*单例模式简单实现*/
/*
int main()
{
Singleton *s1 = Singleton::getInstance();
Singleton *s2 = Singleton::getInstance();
system("pause");
return 0;
}
*/
/*非线程安全 单例模式*/
#include <process.h>
#include <Windows.h>
//多线程，线程数目：5
#define THREAD_NUM 5
unsigned int __stdcall CallSingleton(void *pPM)
{
Singleton *s = Singleton::getInstance();
int nThreadNum = *(int *)pPM;
Sleep(50);
//printf("线程编号为%d\n", nThreadNum);
return 0;
}
int main()
{
HANDLE handle[THREAD_NUM];
//线程编号
int threadNum = 0;
while (threadNum < THREAD_NUM)
{
handle[threadNum] = (HANDLE)_beginthreadex(NULL, 0, CallSingleton, &threadNum, 0, NULL);
//等子线程接收到参数时主线程可能改变了这个i的值
threadNum++;
}
//保证子线程已全部运行结束
WaitForMultipleObjects(THREAD_NUM, handle, TRUE, INFINITE);
system("pause");
return 0;
}